Move AppListGroup to PreferenceController

Move the app list in battery settings to PreferenceController. So that
we can:
1. Clean the code in PowerUsageSummary
2. Make it easy to add/move the app list to other place in furture.

This cl:
1. Move and make it invisible since in P we don't show app list in
battery main page.
2. Move related test to BatteryAppListPreferenceControllerTest

Bug: 70234293
Test: RunSettingsRoboTests
Change-Id: Ice7a42394916ff5e71305bfe22f5c35868d87fc7

res/color/battery_icon_color_error.xml

@@ -14,6 +14,6 @@
      limitations under the License.
 -->
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:alpha="@*android:dimen/secondary_content_alpha_material_dark"
+    <item android:alpha="?android:attr/secondaryContentAlpha"
           android:color="?android:attr/colorError"/>
 </selector>

src/com/android/settings/fuelgauge/BatteryAppListPreferenceController.java

@@ -0,0 +1,482 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+
+package com.android.settings.fuelgauge;
+
+import android.app.Activity;
+import android.app.Fragment;
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.os.BatteryStats;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Process;
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.support.annotation.VisibleForTesting;
+import android.support.v14.preference.PreferenceFragment;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceGroup;
+import android.support.v7.preference.PreferenceManager;
+import android.support.v7.preference.PreferenceScreen;
+import android.text.TextUtils;
+import android.text.format.DateUtils;
+import android.util.ArrayMap;
+import android.util.Log;
+import android.util.SparseArray;
+
+import com.android.internal.os.BatterySipper;
+import com.android.internal.os.BatterySipper.DrainType;
+import com.android.internal.os.BatteryStatsHelper;
+import com.android.internal.os.PowerProfile;
+import com.android.settings.R;
+import com.android.settings.SettingsActivity;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settings.Utils;
+import com.android.settings.core.instrumentation.MetricsFeatureProvider;
+import com.android.settings.fuelgauge.anomaly.Anomaly;
+import com.android.settings.overlay.FeatureFactory;
+import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnDestroy;
+import com.android.settingslib.core.lifecycle.events.OnPause;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Controller that update the battery header view
+ */
+public class BatteryAppListPreferenceController extends AbstractPreferenceController
+        implements PreferenceControllerMixin, LifecycleObserver, OnPause, OnDestroy {
+    private static final boolean USE_FAKE_DATA = true;
+    private static final int MAX_ITEMS_TO_LIST = USE_FAKE_DATA ? 30 : 10;
+    private static final int MIN_AVERAGE_POWER_THRESHOLD_MILLI_AMP = 10;
+    private static final int STATS_TYPE = BatteryStats.STATS_SINCE_CHARGED;
+
+    private final String mPreferenceKey;
+    @VisibleForTesting
+    PreferenceGroup mAppListGroup;
+    private BatteryStatsHelper mBatteryStatsHelper;
+    private ArrayMap<String, Preference> mPreferenceCache;
+    @VisibleForTesting
+    BatteryUtils mBatteryUtils;
+    private UserManager mUserManager;
+    private SettingsActivity mActivity;
+    private PreferenceFragment mFragment;
+    private Context mPrefContext;
+    SparseArray<List<Anomaly>> mAnomalySparseArray;
+
+    private Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message msg) {
+            switch (msg.what) {
+                case BatteryEntry.MSG_UPDATE_NAME_ICON:
+                    BatteryEntry entry = (BatteryEntry) msg.obj;
+                    PowerGaugePreference pgp =
+                            (PowerGaugePreference) mAppListGroup.findPreference(
+                                    Integer.toString(entry.sipper.uidObj.getUid()));
+                    if (pgp != null) {
+                        final int userId = UserHandle.getUserId(entry.sipper.getUid());
+                        final UserHandle userHandle = new UserHandle(userId);
+                        pgp.setIcon(mUserManager.getBadgedIconForUser(entry.getIcon(), userHandle));
+                        pgp.setTitle(entry.name);
+                        if (entry.sipper.drainType == DrainType.APP) {
+                            pgp.setContentDescription(entry.name);
+                        }
+                    }
+                    break;
+                case BatteryEntry.MSG_REPORT_FULLY_DRAWN:
+                    Activity activity = mActivity;
+                    if (activity != null) {
+                        activity.reportFullyDrawn();
+                    }
+                    break;
+            }
+            super.handleMessage(msg);
+        }
+    };
+
+    public BatteryAppListPreferenceController(Context context, String preferenceKey,
+            Lifecycle lifecycle, SettingsActivity activity, PreferenceFragment fragment) {
+        super(context);
+
+        if (lifecycle != null) {
+            lifecycle.addObserver(this);
+        }
+
+        mPreferenceKey = preferenceKey;
+        mBatteryUtils = BatteryUtils.getInstance(context);
+        mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
+        mActivity = activity;
+        mFragment = fragment;
+    }
+
+    @Override
+    public void onPause() {
+        BatteryEntry.stopRequestQueue();
+        mHandler.removeMessages(BatteryEntry.MSG_UPDATE_NAME_ICON);
+    }
+
+    @Override
+    public void onDestroy() {
+        if (mActivity.isChangingConfigurations()) {
+            BatteryEntry.clearUidCache();
+        }
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPrefContext = screen.getContext();
+        mAppListGroup = (PreferenceGroup) screen.findPreference(mPreferenceKey);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return false;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return mPreferenceKey;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (preference instanceof PowerGaugePreference) {
+            PowerGaugePreference pgp = (PowerGaugePreference) preference;
+            BatteryEntry entry = pgp.getInfo();
+            AdvancedPowerUsageDetail.startBatteryDetailPage(mActivity,
+                    mFragment, mBatteryStatsHelper, STATS_TYPE, entry, pgp.getPercent(),
+                    mAnomalySparseArray != null ? mAnomalySparseArray.get(entry.sipper.getUid())
+                            : null);
+            return true;
+        }
+        return false;
+    }
+
+    public void refreshAnomalyIcon(final SparseArray<List<Anomaly>> anomalySparseArray) {
+        if (!isAvailable()) {
+            return;
+        }
+        mAnomalySparseArray = anomalySparseArray;
+        for (int i = 0, size = anomalySparseArray.size(); i < size; i++) {
+            final String key = extractKeyFromUid(anomalySparseArray.keyAt(i));
+            final PowerGaugePreference pref = (PowerGaugePreference) mAppListGroup.findPreference(
+                    key);
+            if (pref != null) {
+                pref.shouldShowAnomalyIcon(true);
+            }
+        }
+    }
+
+    public void refreshAppListGroup(BatteryStatsHelper statsHelper, boolean showAllApps,
+            CharSequence timeSequence) {
+        if (!isAvailable()) {
+            return;
+        }
+        mBatteryStatsHelper = statsHelper;
+        final int resId = showAllApps ? R.string.power_usage_list_summary_device
+                : R.string.power_usage_list_summary;
+        mAppListGroup.setTitle(TextUtils.expandTemplate(mContext.getText(resId), timeSequence));
+
+        final PowerProfile powerProfile = statsHelper.getPowerProfile();
+        final BatteryStats stats = statsHelper.getStats();
+        final double averagePower = powerProfile.getAveragePower(PowerProfile.POWER_SCREEN_FULL);
+        boolean addedSome = false;
+        final int dischargeAmount = USE_FAKE_DATA ? 5000
+                : stats != null ? stats.getDischargeAmount(STATS_TYPE) : 0;
+
+        cacheRemoveAllPrefs(mAppListGroup);
+        mAppListGroup.setOrderingAsAdded(false);
+
+        if (averagePower >= MIN_AVERAGE_POWER_THRESHOLD_MILLI_AMP || USE_FAKE_DATA) {
+            final List<BatterySipper> usageList = getCoalescedUsageList(
+                    USE_FAKE_DATA ? getFakeStats() : statsHelper.getUsageList());
+            double hiddenPowerMah = showAllApps ? 0 :
+                    mBatteryUtils.removeHiddenBatterySippers(usageList);
+            mBatteryUtils.sortUsageList(usageList);
+
+            final int numSippers = usageList.size();
+            for (int i = 0; i < numSippers; i++) {
+                final BatterySipper sipper = usageList.get(i);
+                double totalPower = USE_FAKE_DATA ? 4000 : statsHelper.getTotalPower();
+
+                final double percentOfTotal = mBatteryUtils.calculateBatteryPercent(
+                        sipper.totalPowerMah, totalPower, hiddenPowerMah, dischargeAmount);
+
+                if (((int) (percentOfTotal + .5)) < 1) {
+                    continue;
+                }
+                if (shouldHideSipper(sipper)) {
+                    continue;
+                }
+                final UserHandle userHandle = new UserHandle(UserHandle.getUserId(sipper.getUid()));
+                final BatteryEntry entry = new BatteryEntry(mActivity, mHandler, mUserManager,
+                        sipper);
+                final Drawable badgedIcon = mUserManager.getBadgedIconForUser(entry.getIcon(),
+                        userHandle);
+                final CharSequence contentDescription = mUserManager.getBadgedLabelForUser(
+                        entry.getLabel(),
+                        userHandle);
+
+                final String key = extractKeyFromSipper(sipper);
+                PowerGaugePreference pref = (PowerGaugePreference) getCachedPreference(key);
+                if (pref == null) {
+                    pref = new PowerGaugePreference(mPrefContext, badgedIcon,
+                            contentDescription, entry);
+                    pref.setKey(key);
+                }
+                sipper.percent = percentOfTotal;
+                pref.setTitle(entry.getLabel());
+                pref.setOrder(i + 1);
+                pref.setPercent(percentOfTotal);
+                pref.shouldShowAnomalyIcon(false);
+                if (sipper.usageTimeMs == 0 && sipper.drainType == DrainType.APP) {
+                    sipper.usageTimeMs = mBatteryUtils.getProcessTimeMs(
+                            BatteryUtils.StatusType.FOREGROUND, sipper.uidObj, STATS_TYPE);
+                }
+                setUsageSummary(pref, sipper);
+                addedSome = true;
+                mAppListGroup.addPreference(pref);
+                if (mAppListGroup.getPreferenceCount() - getCachedCount()
+                        > (MAX_ITEMS_TO_LIST + 1)) {
+                    break;
+                }
+            }
+        }
+        if (!addedSome) {
+            addNotAvailableMessage();
+        }
+        removeCachedPrefs(mAppListGroup);
+
+        BatteryEntry.startRequestQueue();
+    }
+
+    /**
+     * We want to coalesce some UIDs. For example, dex2oat runs under a shared gid that
+     * exists for all users of the same app. We detect this case and merge the power use
+     * for dex2oat to the device OWNER's use of the app.
+     *
+     * @return A sorted list of apps using power.
+     */
+    private List<BatterySipper> getCoalescedUsageList(final List<BatterySipper> sippers) {
+        final SparseArray<BatterySipper> uidList = new SparseArray<>();
+
+        final ArrayList<BatterySipper> results = new ArrayList<>();
+        final int numSippers = sippers.size();
+        for (int i = 0; i < numSippers; i++) {
+            BatterySipper sipper = sippers.get(i);
+            if (sipper.getUid() > 0) {
+                int realUid = sipper.getUid();
+
+                // Check if this UID is a shared GID. If so, we combine it with the OWNER's
+                // actual app UID.
+                if (isSharedGid(sipper.getUid())) {
+                    realUid = UserHandle.getUid(UserHandle.USER_SYSTEM,
+                            UserHandle.getAppIdFromSharedAppGid(sipper.getUid()));
+                }
+
+                // Check if this UID is a system UID (mediaserver, logd, nfc, drm, etc).
+                if (isSystemUid(realUid)
+                        && !"mediaserver".equals(sipper.packageWithHighestDrain)) {
+                    // Use the system UID for all UIDs running in their own sandbox that
+                    // are not apps. We exclude mediaserver because we already are expected to
+                    // report that as a separate item.
+                    realUid = Process.SYSTEM_UID;
+                }
+
+                if (realUid != sipper.getUid()) {
+                    // Replace the BatterySipper with a new one with the real UID set.
+                    BatterySipper newSipper = new BatterySipper(sipper.drainType,
+                            new FakeUid(realUid), 0.0);
+                    newSipper.add(sipper);
+                    newSipper.packageWithHighestDrain = sipper.packageWithHighestDrain;
+                    newSipper.mPackages = sipper.mPackages;
+                    sipper = newSipper;
+                }
+
+                int index = uidList.indexOfKey(realUid);
+                if (index < 0) {
+                    // New entry.
+                    uidList.put(realUid, sipper);
+                } else {
+                    // Combine BatterySippers if we already have one with this UID.
+                    final BatterySipper existingSipper = uidList.valueAt(index);
+                    existingSipper.add(sipper);
+                    if (existingSipper.packageWithHighestDrain == null
+                            && sipper.packageWithHighestDrain != null) {
+                        existingSipper.packageWithHighestDrain = sipper.packageWithHighestDrain;
+                    }
+
+                    final int existingPackageLen = existingSipper.mPackages != null ?
+                            existingSipper.mPackages.length : 0;
+                    final int newPackageLen = sipper.mPackages != null ?
+                            sipper.mPackages.length : 0;
+                    if (newPackageLen > 0) {
+                        String[] newPackages = new String[existingPackageLen + newPackageLen];
+                        if (existingPackageLen > 0) {
+                            System.arraycopy(existingSipper.mPackages, 0, newPackages, 0,
+                                    existingPackageLen);
+                        }
+                        System.arraycopy(sipper.mPackages, 0, newPackages, existingPackageLen,
+                                newPackageLen);
+                        existingSipper.mPackages = newPackages;
+                    }
+                }
+            } else {
+                results.add(sipper);
+            }
+        }
+
+        final int numUidSippers = uidList.size();
+        for (int i = 0; i < numUidSippers; i++) {
+            results.add(uidList.valueAt(i));
+        }
+
+        // The sort order must have changed, so re-sort based on total power use.
+        mBatteryUtils.sortUsageList(results);
+        return results;
+    }
+
+    @VisibleForTesting
+    void setUsageSummary(Preference preference, BatterySipper sipper) {
+        // Only show summary when usage time is longer than one minute
+        final long usageTimeMs = sipper.usageTimeMs;
+        if (usageTimeMs >= DateUtils.MINUTE_IN_MILLIS) {
+            final CharSequence timeSequence = Utils.formatElapsedTime(mContext, usageTimeMs,
+                    false);
+            preference.setSummary(
+                    (sipper.drainType != DrainType.APP || mBatteryUtils.shouldHideSipper(sipper))
+                            ? timeSequence
+                            : TextUtils.expandTemplate(mContext.getText(R.string.battery_used_for),
+                                    timeSequence));
+        }
+    }
+
+    @VisibleForTesting
+    boolean shouldHideSipper(BatterySipper sipper) {
+        // Don't show over-counted and unaccounted in any condition
+        return sipper.drainType == BatterySipper.DrainType.OVERCOUNTED
+                || sipper.drainType == BatterySipper.DrainType.UNACCOUNTED;
+    }
+
+    @VisibleForTesting
+    String extractKeyFromSipper(BatterySipper sipper) {
+        if (sipper.uidObj != null) {
+            return extractKeyFromUid(sipper.getUid());
+        } else if (sipper.drainType == DrainType.USER) {
+            return sipper.drainType.toString() + sipper.userId;
+        } else if (sipper.drainType != DrainType.APP) {
+            return sipper.drainType.toString();
+        } else if (sipper.getPackages() != null) {
+            return TextUtils.concat(sipper.getPackages()).toString();
+        } else {
+            Log.w(TAG, "Inappropriate BatterySipper without uid and package names: " + sipper);
+            return "-1";
+        }
+    }
+
+    @VisibleForTesting
+    String extractKeyFromUid(int uid) {
+        return Integer.toString(uid);
+    }
+
+    private void cacheRemoveAllPrefs(PreferenceGroup group) {
+        mPreferenceCache = new ArrayMap<>();
+        final int N = group.getPreferenceCount();
+        for (int i = 0; i < N; i++) {
+            Preference p = group.getPreference(i);
+            if (TextUtils.isEmpty(p.getKey())) {
+                continue;
+            }
+            mPreferenceCache.put(p.getKey(), p);
+        }
+    }
+
+    private static boolean isSharedGid(int uid) {
+        return UserHandle.getAppIdFromSharedAppGid(uid) > 0;
+    }
+
+    private static boolean isSystemUid(int uid) {
+        final int appUid = UserHandle.getAppId(uid);
+        return appUid >= Process.SYSTEM_UID && appUid < Process.FIRST_APPLICATION_UID;
+    }
+
+    private static List<BatterySipper> getFakeStats() {
+        ArrayList<BatterySipper> stats = new ArrayList<>();
+        float use = 5;
+        for (DrainType type : DrainType.values()) {
+            if (type == DrainType.APP) {
+                continue;
+            }
+            stats.add(new BatterySipper(type, null, use));
+            use += 5;
+        }
+        for (int i = 0; i < 100; i++) {
+            stats.add(new BatterySipper(DrainType.APP,
+                    new FakeUid(Process.FIRST_APPLICATION_UID + i), use));
+        }
+        stats.add(new BatterySipper(DrainType.APP,
+                new FakeUid(0), use));
+
+        // Simulate dex2oat process.
+        BatterySipper sipper = new BatterySipper(DrainType.APP,
+                new FakeUid(UserHandle.getSharedAppGid(Process.FIRST_APPLICATION_UID)), 10.0f);
+        sipper.packageWithHighestDrain = "dex2oat";
+        stats.add(sipper);
+
+        sipper = new BatterySipper(DrainType.APP,
+                new FakeUid(UserHandle.getSharedAppGid(Process.FIRST_APPLICATION_UID + 1)), 10.0f);
+        sipper.packageWithHighestDrain = "dex2oat";
+        stats.add(sipper);
+
+        sipper = new BatterySipper(DrainType.APP,
+                new FakeUid(UserHandle.getSharedAppGid(Process.LOG_UID)), 9.0f);
+        stats.add(sipper);
+
+        return stats;
+    }
+
+    private Preference getCachedPreference(String key) {
+        return mPreferenceCache != null ? mPreferenceCache.remove(key) : null;
+    }
+
+    private void removeCachedPrefs(PreferenceGroup group) {
+        for (Preference p : mPreferenceCache.values()) {
+            group.removePreference(p);
+        }
+        mPreferenceCache = null;
+    }
+
+    private int getCachedCount() {
+        return mPreferenceCache != null ? mPreferenceCache.size() : 0;
+    }
+
+    private void addNotAvailableMessage() {
+        final String NOT_AVAILABLE = "not_available";
+        Preference notAvailable = getCachedPreference(NOT_AVAILABLE);
+        if (notAvailable == null) {
+            notAvailable = new Preference(mPrefContext);
+            notAvailable.setKey(NOT_AVAILABLE);
+            notAvailable.setTitle(R.string.power_usage_not_available);
+            mAppListGroup.addPreference(notAvailable);
+        }
+    }
+}

src/com/android/settings/fuelgauge/PowerUsageSummary.java

@@ -21,21 +21,13 @@ import android.app.LoaderManager;
 import android.app.LoaderManager.LoaderCallbacks;
 import android.content.Context;
 import android.content.Loader;
-import android.graphics.drawable.Drawable;
 import android.os.BatteryStats;
 import android.os.Bundle;
-import android.os.Handler;
-import android.os.Message;
-import android.os.Process;
-import android.os.UserHandle;
 import android.provider.SearchIndexableResource;
 import android.support.annotation.VisibleForTesting;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceGroup;
-import android.text.TextUtils;
-import android.text.format.DateUtils;
 import android.text.format.Formatter;
-import android.util.Log;
 import android.util.SparseArray;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -49,7 +41,6 @@ import com.android.internal.hardware.AmbientDisplayConfiguration;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.internal.os.BatterySipper;
 import com.android.internal.os.BatterySipper.DrainType;
-import com.android.internal.os.PowerProfile;
 import com.android.settings.R;
 import com.android.settings.Settings.HighPowerApplicationsActivity;
 import com.android.settings.SettingsActivity;
@@ -71,6 +62,7 @@ import com.android.settings.fuelgauge.anomaly.AnomalyUtils;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -86,12 +78,9 @@ public class PowerUsageSummary extends PowerUsageBase implements
     static final String TAG = "PowerUsageSummary";
 
     private static final boolean DEBUG = false;
-    private static final boolean USE_FAKE_DATA = false;
     private static final String KEY_APP_LIST = "app_list";
     private static final String KEY_BATTERY_HEADER = "battery_header";
     private static final String KEY_SHOW_ALL_APPS = "show_all_apps";
-    private static final int MAX_ITEMS_TO_LIST = USE_FAKE_DATA ? 30 : 10;
-    private static final int MIN_AVERAGE_POWER_THRESHOLD_MILLI_AMP = 10;
 
     private static final String KEY_SCREEN_USAGE = "screen_usage";
     private static final String KEY_TIME_SINCE_LAST_FULL_CHARGE = "last_full_charge";
@@ -136,6 +125,7 @@ public class PowerUsageSummary extends PowerUsageBase implements
     PreferenceGroup mAppListGroup;
     @VisibleForTesting
     BatteryHeaderPreferenceController mBatteryHeaderPreferenceController;
+    private BatteryAppListPreferenceController mBatteryAppListPreferenceController;
     private AnomalySummaryPreferenceController mAnomalySummaryPreferenceController;
     private int mStatsType = BatteryStats.STATS_SINCE_CHARGED;
 
@@ -157,7 +147,7 @@ public class PowerUsageSummary extends PowerUsageBase implements
                     mAnomalySummaryPreferenceController.updateAnomalySummaryPreference(data);
 
                     updateAnomalySparseArray(data);
-                    refreshAnomalyIcon();
+                    mBatteryAppListPreferenceController.refreshAnomalyIcon(mAnomalySparseArray);
                 }
 
                 @Override
@@ -235,7 +225,6 @@ public class PowerUsageSummary extends PowerUsageBase implements
         initFeatureProvider();
         mBatteryLayoutPref = (LayoutPreference) findPreference(KEY_BATTERY_HEADER);
 
-        mAppListGroup = (PreferenceGroup) findPreference(KEY_APP_LIST);
         mScreenUsagePref = (PowerGaugePreference) findPreference(KEY_SCREEN_USAGE);
         mLastFullChargePref = (PowerGaugePreference) findPreference(
                 KEY_TIME_SINCE_LAST_FULL_CHARGE);
@@ -254,21 +243,6 @@ public class PowerUsageSummary extends PowerUsageBase implements
         return MetricsEvent.FUELGAUGE_POWER_USAGE_SUMMARY_V2;
     }
 
-    @Override
-    public void onPause() {
-        BatteryEntry.stopRequestQueue();
-        mHandler.removeMessages(BatteryEntry.MSG_UPDATE_NAME_ICON);
-        super.onPause();
-    }
-
-    @Override
-    public void onDestroy() {
-        super.onDestroy();
-        if (getActivity().isChangingConfigurations()) {
-            BatteryEntry.clearUidCache();
-        }
-    }
-
     @Override
     public void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
@@ -283,14 +257,7 @@ public class PowerUsageSummary extends PowerUsageBase implements
         if (KEY_BATTERY_HEADER.equals(preference.getKey())) {
             performBatteryHeaderClick();
             return true;
-        } else if (!(preference instanceof PowerGaugePreference)) {
-            return super.onPreferenceTreeClick(preference);
         }
-        PowerGaugePreference pgp = (PowerGaugePreference) preference;
-        BatteryEntry entry = pgp.getInfo();
-        AdvancedPowerUsageDetail.startBatteryDetailPage((SettingsActivity) getActivity(),
-                this, mStatsHelper, mStatsType, entry, pgp.getPercent(),
-                mAnomalySparseArray.get(entry.sipper.getUid()));
         return super.onPreferenceTreeClick(preference);
     }
 
@@ -306,10 +273,15 @@ public class PowerUsageSummary extends PowerUsageBase implements
 
     @Override
     protected List<AbstractPreferenceController> getPreferenceControllers(Context context) {
+        final Lifecycle lifecycle = getLifecycle();
+        final SettingsActivity activity = (SettingsActivity) getActivity();
         final List<AbstractPreferenceController> controllers = new ArrayList<>();
         mBatteryHeaderPreferenceController = new BatteryHeaderPreferenceController(
-                context, getActivity(), this /* host */, getLifecycle());
+                context, activity, this /* host */, getLifecycle());
         controllers.add(mBatteryHeaderPreferenceController);
+        mBatteryAppListPreferenceController = new BatteryAppListPreferenceController(context,
+                KEY_APP_LIST, lifecycle, activity, this);
+        controllers.add(mBatteryAppListPreferenceController);
         controllers.add(new AutoBrightnessPreferenceController(context, KEY_AUTO_BRIGHTNESS));
         controllers.add(new TimeoutPreferenceController(context, KEY_SCREEN_TIMEOUT));
         controllers.add(new BatterySaverController(context, getLifecycle()));
@@ -388,17 +360,6 @@ public class PowerUsageSummary extends PowerUsageBase implements
         }
     }
 
-    private void addNotAvailableMessage() {
-        final String NOT_AVAILABLE = "not_available";
-        Preference notAvailable = getCachedPreference(NOT_AVAILABLE);
-        if (notAvailable == null) {
-            notAvailable = new Preference(getPrefContext());
-            notAvailable.setKey(NOT_AVAILABLE);
-            notAvailable.setTitle(R.string.power_usage_not_available);
-            mAppListGroup.addPreference(notAvailable);
-        }
-    }
-
     private void performBatteryHeaderClick() {
         if (mPowerFeatureProvider.isAdvancedUiEnabled()) {
             Utils.startWithFragment(getContext(), PowerUsageAdvanced.class.getName(), null,
@@ -415,101 +376,6 @@ public class PowerUsageSummary extends PowerUsageBase implements
         }
     }
 
-    private static boolean isSharedGid(int uid) {
-        return UserHandle.getAppIdFromSharedAppGid(uid) > 0;
-    }
-
-    private static boolean isSystemUid(int uid) {
-        final int appUid = UserHandle.getAppId(uid);
-        return appUid >= Process.SYSTEM_UID && appUid < Process.FIRST_APPLICATION_UID;
-    }
-
-    /**
-     * We want to coalesce some UIDs. For example, dex2oat runs under a shared gid that
-     * exists for all users of the same app. We detect this case and merge the power use
-     * for dex2oat to the device OWNER's use of the app.
-     *
-     * @return A sorted list of apps using power.
-     */
-    private List<BatterySipper> getCoalescedUsageList(final List<BatterySipper> sippers) {
-        final SparseArray<BatterySipper> uidList = new SparseArray<>();
-
-        final ArrayList<BatterySipper> results = new ArrayList<>();
-        final int numSippers = sippers.size();
-        for (int i = 0; i < numSippers; i++) {
-            BatterySipper sipper = sippers.get(i);
-            if (sipper.getUid() > 0) {
-                int realUid = sipper.getUid();
-
-                // Check if this UID is a shared GID. If so, we combine it with the OWNER's
-                // actual app UID.
-                if (isSharedGid(sipper.getUid())) {
-                    realUid = UserHandle.getUid(UserHandle.USER_SYSTEM,
-                            UserHandle.getAppIdFromSharedAppGid(sipper.getUid()));
-                }
-
-                // Check if this UID is a system UID (mediaserver, logd, nfc, drm, etc).
-                if (isSystemUid(realUid)
-                        && !"mediaserver".equals(sipper.packageWithHighestDrain)) {
-                    // Use the system UID for all UIDs running in their own sandbox that
-                    // are not apps. We exclude mediaserver because we already are expected to
-                    // report that as a separate item.
-                    realUid = Process.SYSTEM_UID;
-                }
-
-                if (realUid != sipper.getUid()) {
-                    // Replace the BatterySipper with a new one with the real UID set.
-                    BatterySipper newSipper = new BatterySipper(sipper.drainType,
-                            new FakeUid(realUid), 0.0);
-                    newSipper.add(sipper);
-                    newSipper.packageWithHighestDrain = sipper.packageWithHighestDrain;
-                    newSipper.mPackages = sipper.mPackages;
-                    sipper = newSipper;
-                }
-
-                int index = uidList.indexOfKey(realUid);
-                if (index < 0) {
-                    // New entry.
-                    uidList.put(realUid, sipper);
-                } else {
-                    // Combine BatterySippers if we already have one with this UID.
-                    final BatterySipper existingSipper = uidList.valueAt(index);
-                    existingSipper.add(sipper);
-                    if (existingSipper.packageWithHighestDrain == null
-                            && sipper.packageWithHighestDrain != null) {
-                        existingSipper.packageWithHighestDrain = sipper.packageWithHighestDrain;
-                    }
-
-                    final int existingPackageLen = existingSipper.mPackages != null ?
-                            existingSipper.mPackages.length : 0;
-                    final int newPackageLen = sipper.mPackages != null ?
-                            sipper.mPackages.length : 0;
-                    if (newPackageLen > 0) {
-                        String[] newPackages = new String[existingPackageLen + newPackageLen];
-                        if (existingPackageLen > 0) {
-                            System.arraycopy(existingSipper.mPackages, 0, newPackages, 0,
-                                    existingPackageLen);
-                        }
-                        System.arraycopy(sipper.mPackages, 0, newPackages, existingPackageLen,
-                                newPackageLen);
-                        existingSipper.mPackages = newPackages;
-                    }
-                }
-            } else {
-                results.add(sipper);
-            }
-        }
-
-        final int numUidSippers = uidList.size();
-        for (int i = 0; i < numUidSippers; i++) {
-            results.add(uidList.valueAt(i));
-        }
-
-        // The sort order must have changed, so re-sort based on total power use.
-        mBatteryUtils.sortUsageList(results);
-        return results;
-    }
-
     protected void refreshUi() {
         final Context context = getContext();
         if (context == null) {
@@ -527,102 +393,8 @@ public class PowerUsageSummary extends PowerUsageBase implements
 
         final CharSequence timeSequence = Utils.formatRelativeTime(context, lastFullChargeTime,
                 false);
-        final int resId = mShowAllApps ? R.string.power_usage_list_summary_device
+        mBatteryAppListPreferenceController.refreshAppListGroup(mStatsHelper, mShowAllApps,
-                : R.string.power_usage_list_summary;
+                timeSequence);
-        mAppListGroup.setTitle(TextUtils.expandTemplate(getText(resId), timeSequence));
-
-        refreshAppListGroup();
-    }
-
-    private void refreshAppListGroup() {
-        final PowerProfile powerProfile = mStatsHelper.getPowerProfile();
-        final BatteryStats stats = mStatsHelper.getStats();
-        final double averagePower = powerProfile.getAveragePower(PowerProfile.POWER_SCREEN_FULL);
-        boolean addedSome = false;
-        final int dischargeAmount = USE_FAKE_DATA ? 5000
-                : stats != null ? stats.getDischargeAmount(mStatsType) : 0;
-
-        cacheRemoveAllPrefs(mAppListGroup);
-        mAppListGroup.setOrderingAsAdded(false);
-
-        if (averagePower >= MIN_AVERAGE_POWER_THRESHOLD_MILLI_AMP || USE_FAKE_DATA) {
-            final List<BatterySipper> usageList = getCoalescedUsageList(
-                    USE_FAKE_DATA ? getFakeStats() : mStatsHelper.getUsageList());
-            double hiddenPowerMah = mShowAllApps ? 0 :
-                    mBatteryUtils.removeHiddenBatterySippers(usageList);
-            mBatteryUtils.sortUsageList(usageList);
-
-            final int numSippers = usageList.size();
-            for (int i = 0; i < numSippers; i++) {
-                final BatterySipper sipper = usageList.get(i);
-                double totalPower = USE_FAKE_DATA ? 4000 : mStatsHelper.getTotalPower();
-
-                final double percentOfTotal = mBatteryUtils.calculateBatteryPercent(
-                        sipper.totalPowerMah, totalPower, hiddenPowerMah, dischargeAmount);
-
-                if (((int) (percentOfTotal + .5)) < 1) {
-                    continue;
-                }
-                if (shouldHideSipper(sipper)) {
-                    continue;
-                }
-                final UserHandle userHandle = new UserHandle(UserHandle.getUserId(sipper.getUid()));
-                final BatteryEntry entry = new BatteryEntry(getActivity(), mHandler, mUm, sipper);
-                final Drawable badgedIcon = mUm.getBadgedIconForUser(entry.getIcon(),
-                        userHandle);
-                final CharSequence contentDescription = mUm.getBadgedLabelForUser(entry.getLabel(),
-                        userHandle);
-
-                final String key = extractKeyFromSipper(sipper);
-                PowerGaugePreference pref = (PowerGaugePreference) getCachedPreference(key);
-                if (pref == null) {
-                    pref = new PowerGaugePreference(getPrefContext(), badgedIcon,
-                            contentDescription, entry);
-                    pref.setKey(key);
-                }
-                sipper.percent = percentOfTotal;
-                pref.setTitle(entry.getLabel());
-                pref.setOrder(i + 1);
-                pref.setPercent(percentOfTotal);
-                pref.shouldShowAnomalyIcon(false);
-                if (sipper.usageTimeMs == 0 && sipper.drainType == DrainType.APP) {
-                    sipper.usageTimeMs = mBatteryUtils.getProcessTimeMs(
-                            BatteryUtils.StatusType.FOREGROUND, sipper.uidObj, mStatsType);
-                }
-                setUsageSummary(pref, sipper);
-                addedSome = true;
-                mAppListGroup.addPreference(pref);
-                if (mAppListGroup.getPreferenceCount() - getCachedCount()
-                        > (MAX_ITEMS_TO_LIST + 1)) {
-                    break;
-                }
-            }
-        }
-        if (!addedSome) {
-            addNotAvailableMessage();
-        }
-        removeCachedPrefs(mAppListGroup);
-
-        BatteryEntry.startRequestQueue();
-    }
-
-    @VisibleForTesting
-    boolean shouldHideSipper(BatterySipper sipper) {
-        // Don't show over-counted and unaccounted in any condition
-        return sipper.drainType == BatterySipper.DrainType.OVERCOUNTED
-                || sipper.drainType == BatterySipper.DrainType.UNACCOUNTED;
-    }
-
-    @VisibleForTesting
-    void refreshAnomalyIcon() {
-        for (int i = 0, size = mAnomalySparseArray.size(); i < size; i++) {
-            final String key = extractKeyFromUid(mAnomalySparseArray.keyAt(i));
-            final PowerGaugePreference pref = (PowerGaugePreference) mAppListGroup.findPreference(
-                    key);
-            if (pref != null) {
-                pref.shouldShowAnomalyIcon(true);
-            }
-        }
     }
 
     @VisibleForTesting
@@ -632,6 +404,11 @@ public class PowerUsageSummary extends PowerUsageBase implements
         }
     }
 
+    @VisibleForTesting
+    void setBatteryLayoutPreference(LayoutPreference layoutPreference) {
+        mBatteryLayoutPref = layoutPreference;
+    }
+
     @VisibleForTesting
     AnomalyDetectionPolicy getAnomalyDetectionPolicy() {
         return new AnomalyDetectionPolicy(getContext());
@@ -674,54 +451,6 @@ public class PowerUsageSummary extends PowerUsageBase implements
                 mBatteryInfoDebugLoaderCallbacks);
     }
 
-    @VisibleForTesting
-    double calculatePercentage(double powerUsage, double dischargeAmount) {
-        final double totalPower = mStatsHelper.getTotalPower();
-        return totalPower == 0 ? 0 :
-                ((powerUsage / totalPower) * dischargeAmount);
-    }
-
-    @VisibleForTesting
-    void setUsageSummary(Preference preference, BatterySipper sipper) {
-        // Only show summary when usage time is longer than one minute
-        final long usageTimeMs = sipper.usageTimeMs;
-        if (usageTimeMs >= DateUtils.MINUTE_IN_MILLIS) {
-            final CharSequence timeSequence = Utils.formatElapsedTime(getContext(), usageTimeMs,
-                    false);
-            preference.setSummary(
-                    (sipper.drainType != DrainType.APP || mBatteryUtils.shouldHideSipper(sipper))
-                            ? timeSequence
-                            : TextUtils.expandTemplate(getText(R.string.battery_used_for),
-                                    timeSequence));
-        }
-    }
-
-    @VisibleForTesting
-    String extractKeyFromSipper(BatterySipper sipper) {
-        if (sipper.uidObj != null) {
-            return extractKeyFromUid(sipper.getUid());
-        } else if (sipper.drainType == DrainType.USER) {
-            return sipper.drainType.toString() + sipper.userId;
-        } else if (sipper.drainType != DrainType.APP) {
-            return sipper.drainType.toString();
-        } else if (sipper.getPackages() != null) {
-            return TextUtils.concat(sipper.getPackages()).toString();
-        } else {
-            Log.w(TAG, "Inappropriate BatterySipper without uid and package names: " + sipper);
-            return "-1";
-        }
-    }
-
-    @VisibleForTesting
-    String extractKeyFromUid(int uid) {
-        return Integer.toString(uid);
-    }
-
-    @VisibleForTesting
-    void setBatteryLayoutPreference(LayoutPreference layoutPreference) {
-        mBatteryLayoutPref = layoutPreference;
-    }
-
     @VisibleForTesting
     void initFeatureProvider() {
         final Context context = getContext();
@@ -755,72 +484,6 @@ public class PowerUsageSummary extends PowerUsageBase implements
         }
     }
 
-    private static List<BatterySipper> getFakeStats() {
-        ArrayList<BatterySipper> stats = new ArrayList<>();
-        float use = 5;
-        for (DrainType type : DrainType.values()) {
-            if (type == DrainType.APP) {
-                continue;
-            }
-            stats.add(new BatterySipper(type, null, use));
-            use += 5;
-        }
-        for (int i = 0; i < 100; i++) {
-            stats.add(new BatterySipper(DrainType.APP,
-                    new FakeUid(Process.FIRST_APPLICATION_UID + i), use));
-        }
-        stats.add(new BatterySipper(DrainType.APP,
-                new FakeUid(0), use));
-
-        // Simulate dex2oat process.
-        BatterySipper sipper = new BatterySipper(DrainType.APP,
-                new FakeUid(UserHandle.getSharedAppGid(Process.FIRST_APPLICATION_UID)), 10.0f);
-        sipper.packageWithHighestDrain = "dex2oat";
-        stats.add(sipper);
-
-        sipper = new BatterySipper(DrainType.APP,
-                new FakeUid(UserHandle.getSharedAppGid(Process.FIRST_APPLICATION_UID + 1)), 10.0f);
-        sipper.packageWithHighestDrain = "dex2oat";
-        stats.add(sipper);
-
-        sipper = new BatterySipper(DrainType.APP,
-                new FakeUid(UserHandle.getSharedAppGid(Process.LOG_UID)), 9.0f);
-        stats.add(sipper);
-
-        return stats;
-    }
-
-    Handler mHandler = new Handler() {
-
-        @Override
-        public void handleMessage(Message msg) {
-            switch (msg.what) {
-                case BatteryEntry.MSG_UPDATE_NAME_ICON:
-                    BatteryEntry entry = (BatteryEntry) msg.obj;
-                    PowerGaugePreference pgp =
-                            (PowerGaugePreference) findPreference(
-                                    Integer.toString(entry.sipper.uidObj.getUid()));
-                    if (pgp != null) {
-                        final int userId = UserHandle.getUserId(entry.sipper.getUid());
-                        final UserHandle userHandle = new UserHandle(userId);
-                        pgp.setIcon(mUm.getBadgedIconForUser(entry.getIcon(), userHandle));
-                        pgp.setTitle(entry.name);
-                        if (entry.sipper.drainType == DrainType.APP) {
-                            pgp.setContentDescription(entry.name);
-                        }
-                    }
-                    break;
-                case BatteryEntry.MSG_REPORT_FULLY_DRAWN:
-                    Activity activity = getActivity();
-                    if (activity != null) {
-                        activity.reportFullyDrawn();
-                    }
-                    break;
-            }
-            super.handleMessage(msg);
-        }
-    };
-
     @Override
     public void onAnomalyHandled(Anomaly anomaly) {
         mAnomalySummaryPreferenceController.hideHighUsagePreference();

tests/robotests/src/com/android/settings/fuelgauge/BatteryAppListPreferenceControllerTest.java

@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.fuelgauge;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.support.v14.preference.PreferenceFragment;
+import android.support.v7.preference.PreferenceGroup;
+import android.text.TextUtils;
+import android.text.format.DateUtils;
+import android.util.SparseArray;
+
+import com.android.internal.os.BatterySipper;
+import com.android.internal.os.BatteryStatsImpl;
+import com.android.settings.R;
+import com.android.settings.SettingsActivity;
+import com.android.settings.TestConfig;
+import com.android.settings.fuelgauge.anomaly.Anomaly;
+import com.android.settings.testutils.FakeFeatureFactory;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+import java.util.List;
+
+@RunWith(RobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class BatteryAppListPreferenceControllerTest {
+    private static final String[] PACKAGE_NAMES = {"com.app1", "com.app2"};
+    private static final String KEY_APP_LIST = "app_list";
+    private static final int UID = 123;
+
+    @Mock
+    private BatterySipper mNormalBatterySipper;
+    @Mock
+    private SettingsActivity mSettingsActivity;
+    @Mock
+    private PreferenceGroup mAppListGroup;
+    @Mock
+    private PreferenceFragment mFragment;
+    @Mock
+    private BatteryUtils mBatteryUtils;
+
+    private Context mContext;
+    private PowerGaugePreference mPreference;
+    private BatteryAppListPreferenceController mPreferenceController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mContext = spy(RuntimeEnvironment.application);
+        FakeFeatureFactory.setupForTest();
+
+        mPreference = new PowerGaugePreference(mContext);
+        when(mNormalBatterySipper.getPackages()).thenReturn(PACKAGE_NAMES);
+        when(mNormalBatterySipper.getUid()).thenReturn(UID);
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
+
+        mPreferenceController = new BatteryAppListPreferenceController(mContext, KEY_APP_LIST, null,
+                mSettingsActivity, mFragment);
+        mPreferenceController.mBatteryUtils = mBatteryUtils;
+        mPreferenceController.mAppListGroup = mAppListGroup;
+    }
+
+    @Test
+    public void testExtractKeyFromSipper_typeAPPUidObjectNull_returnPackageNames() {
+        mNormalBatterySipper.uidObj = null;
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
+
+        final String key = mPreferenceController.extractKeyFromSipper(mNormalBatterySipper);
+        assertThat(key).isEqualTo(TextUtils.concat(mNormalBatterySipper.getPackages()).toString());
+    }
+
+    @Test
+    public void testExtractKeyFromSipper_typeOther_returnDrainType() {
+        mNormalBatterySipper.uidObj = null;
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.BLUETOOTH;
+
+        final String key = mPreferenceController.extractKeyFromSipper(mNormalBatterySipper);
+        assertThat(key).isEqualTo(mNormalBatterySipper.drainType.toString());
+    }
+
+    @Test
+    public void testExtractKeyFromSipper_typeUser_returnDrainTypeWithUserId() {
+        mNormalBatterySipper.uidObj = null;
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.USER;
+        mNormalBatterySipper.userId = 2;
+
+        final String key = mPreferenceController.extractKeyFromSipper(mNormalBatterySipper);
+        assertThat(key).isEqualTo("USER2");
+    }
+
+    @Test
+    public void testExtractKeyFromSipper_typeAPPUidObjectNotNull_returnUid() {
+        mNormalBatterySipper.uidObj = new BatteryStatsImpl.Uid(new BatteryStatsImpl(), UID);
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
+
+        final String key = mPreferenceController.extractKeyFromSipper(mNormalBatterySipper);
+        assertThat(key).isEqualTo(Integer.toString(mNormalBatterySipper.getUid()));
+    }
+
+    @Test
+    public void testSetUsageSummary_timeLessThanOneMinute_DoNotSetSummary() {
+        mNormalBatterySipper.usageTimeMs = 59 * DateUtils.SECOND_IN_MILLIS;
+
+        mPreferenceController.setUsageSummary(mPreference, mNormalBatterySipper);
+        assertThat(mPreference.getSummary()).isNull();
+    }
+
+    @Test
+    public void testSetUsageSummary_timeMoreThanOneMinute_normalApp_setScreenSummary() {
+        mNormalBatterySipper.usageTimeMs = 2 * DateUtils.MINUTE_IN_MILLIS;
+        doReturn(mContext.getText(R.string.battery_used_for)).when(mFragment).getText(
+                R.string.battery_used_for);
+        doReturn(mContext).when(mFragment).getContext();
+
+        mPreferenceController.setUsageSummary(mPreference, mNormalBatterySipper);
+
+        assertThat(mPreference.getSummary().toString()).isEqualTo("Used for 2m");
+    }
+
+    @Test
+    public void testSetUsageSummary_timeMoreThanOneMinute_hiddenApp_setUsedSummary() {
+        mNormalBatterySipper.usageTimeMs = 2 * DateUtils.MINUTE_IN_MILLIS;
+        doReturn(true).when(mBatteryUtils).shouldHideSipper(mNormalBatterySipper);
+        doReturn(mContext).when(mFragment).getContext();
+
+        mPreferenceController.setUsageSummary(mPreference, mNormalBatterySipper);
+
+        assertThat(mPreference.getSummary().toString()).isEqualTo("2m");
+    }
+
+    @Test
+    public void testSetUsageSummary_timeMoreThanOneMinute_notApp_setUsedSummary() {
+        mNormalBatterySipper.usageTimeMs = 2 * DateUtils.MINUTE_IN_MILLIS;
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.PHONE;
+        doReturn(mContext).when(mFragment).getContext();
+
+        mPreferenceController.setUsageSummary(mPreference, mNormalBatterySipper);
+
+        assertThat(mPreference.getSummary().toString()).isEqualTo("2m");
+    }
+
+    @Test
+    public void testRefreshAnomalyIcon_containsAnomaly_showAnomalyIcon() {
+        PowerGaugePreference preference = new PowerGaugePreference(mContext);
+        final String key = mPreferenceController.extractKeyFromUid(UID);
+        final SparseArray<List<Anomaly>> anomalySparseArray = new SparseArray<>();
+        anomalySparseArray.append(UID, null);
+        preference.setKey(key);
+        doReturn(preference).when(mAppListGroup).findPreference(key);
+
+        mPreferenceController.refreshAnomalyIcon(anomalySparseArray);
+
+        assertThat(preference.showAnomalyIcon()).isTrue();
+    }
+
+    @Test
+    public void testShouldHideSipper_typeOvercounted_returnTrue() {
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.OVERCOUNTED;
+
+        assertThat(mPreferenceController.shouldHideSipper(mNormalBatterySipper)).isTrue();
+    }
+
+    @Test
+    public void testShouldHideSipper_typeUnaccounted_returnTrue() {
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.UNACCOUNTED;
+
+        assertThat(mPreferenceController.shouldHideSipper(mNormalBatterySipper)).isTrue();
+    }
+
+    @Test
+    public void testShouldHideSipper_typeNormal_returnFalse() {
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
+
+        assertThat(mPreferenceController.shouldHideSipper(mNormalBatterySipper)).isFalse();
+    }
+}

tests/robotests/src/com/android/settings/fuelgauge/PowerUsageSummaryTest.java

@@ -0,0 +1,422 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.settings.fuelgauge;
+
+import static com.android.settings.fuelgauge.PowerUsageSummary.MENU_HIGH_POWER_APPS;
+import static com.android.settings.fuelgauge.PowerUsageSummary.MENU_TOGGLE_APPS;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Matchers.anyLong;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.LoaderManager;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.PowerManager;
+import android.support.v7.preference.PreferenceScreen;
+import android.util.SparseArray;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.TextView;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.internal.os.BatterySipper;
+import com.android.internal.os.BatteryStatsHelper;
+import com.android.settings.R;
+import com.android.settings.SettingsActivity;
+import com.android.settings.TestConfig;
+import com.android.settings.Utils;
+import com.android.settings.applications.LayoutPreference;
+import com.android.settings.fuelgauge.anomaly.Anomaly;
+import com.android.settings.fuelgauge.anomaly.AnomalyDetectionPolicy;
+import com.android.settings.testutils.FakeFeatureFactory;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.XmlTestUtils;
+import com.android.settings.testutils.shadow.SettingsShadowResources;
+import com.android.settingslib.core.AbstractPreferenceController;
+
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.Robolectric;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Unit tests for {@link PowerUsageSummary}.
+ */
+// TODO: Improve this test class so that it starts up the real activity and fragment.
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH,
+        sdk = TestConfig.SDK_VERSION_O,
+        shadows = {
+                SettingsShadowResources.class,
+                SettingsShadowResources.SettingsShadowTheme.class,
+        })
+public class PowerUsageSummaryTest {
+    private static final String STUB_STRING = "stub_string";
+    private static final int UID = 123;
+    private static final int UID_2 = 234;
+    private static final int POWER_MAH = 100;
+    private static final long TIME_SINCE_LAST_FULL_CHARGE_MS = 120 * 60 * 1000;
+    private static final long TIME_SINCE_LAST_FULL_CHARGE_US =
+            TIME_SINCE_LAST_FULL_CHARGE_MS * 1000;
+    private static final long USAGE_TIME_MS = 65 * 60 * 1000;
+    private static final double TOTAL_POWER = 200;
+    public static final String NEW_ML_EST_SUFFIX = "(New ML est)";
+    public static final String OLD_EST_SUFFIX = "(Old est)";
+    private static Intent sAdditionalBatteryInfoIntent;
+
+    @BeforeClass
+    public static void beforeClass() {
+        sAdditionalBatteryInfoIntent = new Intent("com.example.app.ADDITIONAL_BATTERY_INFO");
+    }
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Menu mMenu;
+    @Mock
+    private MenuItem mToggleAppsMenu;
+    @Mock
+    private MenuItem mHighPowerMenu;
+    @Mock
+    private MenuInflater mMenuInflater;
+    @Mock
+    private BatterySipper mNormalBatterySipper;
+    @Mock
+    private BatterySipper mScreenBatterySipper;
+    @Mock
+    private BatterySipper mCellBatterySipper;
+    @Mock
+    private LayoutPreference mBatteryLayoutPref;
+    @Mock
+    private TextView mBatteryPercentText;
+    @Mock
+    private TextView mSummary1;
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private BatteryStatsHelper mBatteryHelper;
+    @Mock
+    private PowerManager mPowerManager;
+    @Mock
+    private SettingsActivity mSettingsActivity;
+    @Mock
+    private LoaderManager mLoaderManager;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+    @Mock
+    private AnomalyDetectionPolicy mAnomalyDetectionPolicy;
+    @Mock
+    private BatteryHeaderPreferenceController mBatteryHeaderPreferenceController;
+
+    private List<BatterySipper> mUsageList;
+    private Context mRealContext;
+    private TestFragment mFragment;
+    private FakeFeatureFactory mFeatureFactory;
+    private BatteryMeterView mBatteryMeterView;
+    private PowerGaugePreference mScreenUsagePref;
+    private PowerGaugePreference mLastFullChargePref;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mRealContext = RuntimeEnvironment.application;
+        mFeatureFactory = FakeFeatureFactory.setupForTest();
+        when(mContext.getSystemService(Context.POWER_SERVICE)).thenReturn(mPowerManager);
+
+        mScreenUsagePref = new PowerGaugePreference(mRealContext);
+        mLastFullChargePref = new PowerGaugePreference(mRealContext);
+        mFragment = spy(new TestFragment(mContext));
+        mFragment.initFeatureProvider();
+        mBatteryMeterView = new BatteryMeterView(mRealContext);
+        mBatteryMeterView.mDrawable = new BatteryMeterView.BatteryMeterDrawable(mRealContext, 0);
+        doNothing().when(mFragment).restartBatteryStatsLoader();
+        doReturn(mock(LoaderManager.class)).when(mFragment).getLoaderManager();
+
+        when(mFragment.getActivity()).thenReturn(mSettingsActivity);
+        when(mToggleAppsMenu.getItemId()).thenReturn(MENU_TOGGLE_APPS);
+        when(mHighPowerMenu.getItemId()).thenReturn(MENU_HIGH_POWER_APPS);
+        when(mFeatureFactory.powerUsageFeatureProvider.getAdditionalBatteryInfoIntent())
+                .thenReturn(sAdditionalBatteryInfoIntent);
+        when(mBatteryHelper.getTotalPower()).thenReturn(TOTAL_POWER);
+        when(mBatteryHelper.getStats().computeBatteryRealtime(anyLong(), anyInt())).thenReturn(
+                TIME_SINCE_LAST_FULL_CHARGE_US);
+
+        when(mNormalBatterySipper.getUid()).thenReturn(UID);
+        mNormalBatterySipper.totalPowerMah = POWER_MAH;
+        mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
+
+        mCellBatterySipper.drainType = BatterySipper.DrainType.CELL;
+        mCellBatterySipper.totalPowerMah = POWER_MAH;
+
+        when(mBatteryLayoutPref.findViewById(R.id.summary1)).thenReturn(mSummary1);
+        when(mBatteryLayoutPref.findViewById(R.id.battery_percent)).thenReturn(mBatteryPercentText);
+        when(mBatteryLayoutPref.findViewById(R.id.battery_header_icon))
+                .thenReturn(mBatteryMeterView);
+        mFragment.setBatteryLayoutPreference(mBatteryLayoutPref);
+
+        mScreenBatterySipper.drainType = BatterySipper.DrainType.SCREEN;
+        mScreenBatterySipper.usageTimeMs = USAGE_TIME_MS;
+
+        mUsageList = new ArrayList<>();
+        mUsageList.add(mNormalBatterySipper);
+        mUsageList.add(mScreenBatterySipper);
+        mUsageList.add(mCellBatterySipper);
+
+        mFragment.mStatsHelper = mBatteryHelper;
+        when(mBatteryHelper.getUsageList()).thenReturn(mUsageList);
+        mFragment.mScreenUsagePref = mScreenUsagePref;
+        mFragment.mLastFullChargePref = mLastFullChargePref;
+        mFragment.mBatteryUtils = spy(new BatteryUtils(mRealContext));
+    }
+
+    @Test
+    public void testOptionsMenu_menuHighPower_metricEventInvoked() {
+        mFragment.onOptionsItemSelected(mHighPowerMenu);
+
+        verify(mFeatureFactory.metricsFeatureProvider).action(mContext,
+                MetricsProto.MetricsEvent.ACTION_SETTINGS_MENU_BATTERY_OPTIMIZATION);
+    }
+
+    @Test
+    public void testOptionsMenu_menuAppToggle_metricEventInvoked() {
+        mFragment.onOptionsItemSelected(mToggleAppsMenu);
+        mFragment.mShowAllApps = false;
+
+        verify(mFeatureFactory.metricsFeatureProvider).action(mContext,
+                MetricsProto.MetricsEvent.ACTION_SETTINGS_MENU_BATTERY_APPS_TOGGLE, true);
+    }
+
+    @Test
+    public void testOptionsMenu_toggleAppsEnabled() {
+        when(mFeatureFactory.powerUsageFeatureProvider.isPowerAccountingToggleEnabled())
+                .thenReturn(true);
+        mFragment.mShowAllApps = false;
+
+        mFragment.onCreateOptionsMenu(mMenu, mMenuInflater);
+
+        verify(mMenu).add(Menu.NONE, MENU_TOGGLE_APPS, Menu.NONE, R.string.show_all_apps);
+    }
+
+    @Test
+    public void testOptionsMenu_clickToggleAppsMenu_dataChanged() {
+        testToggleAllApps(true);
+        testToggleAllApps(false);
+    }
+
+    private void testToggleAllApps(final boolean isShowApps) {
+        mFragment.mShowAllApps = isShowApps;
+
+        mFragment.onOptionsItemSelected(mToggleAppsMenu);
+        assertThat(mFragment.mShowAllApps).isEqualTo(!isShowApps);
+    }
+
+    @Test
+    public void testFindBatterySipperByType_findTypeScreen() {
+        BatterySipper sipper = mFragment.findBatterySipperByType(mUsageList,
+                BatterySipper.DrainType.SCREEN);
+
+        assertThat(sipper).isSameAs(mScreenBatterySipper);
+    }
+
+    @Test
+    public void testFindBatterySipperByType_findTypeApp() {
+        BatterySipper sipper = mFragment.findBatterySipperByType(mUsageList,
+                BatterySipper.DrainType.APP);
+
+        assertThat(sipper).isSameAs(mNormalBatterySipper);
+    }
+
+    @Test
+    public void testUpdateScreenPreference_showCorrectSummary() {
+        doReturn(mScreenBatterySipper).when(mFragment).findBatterySipperByType(any(), any());
+        doReturn(mRealContext).when(mFragment).getContext();
+        final CharSequence expectedSummary = Utils.formatElapsedTime(mRealContext, USAGE_TIME_MS,
+                false);
+
+        mFragment.updateScreenPreference();
+
+        assertThat(mScreenUsagePref.getSubtitle()).isEqualTo(expectedSummary);
+    }
+
+    @Test
+    public void testUpdateLastFullChargePreference_showCorrectSummary() {
+        doReturn(mRealContext).when(mFragment).getContext();
+
+        mFragment.updateLastFullChargePreference(TIME_SINCE_LAST_FULL_CHARGE_MS);
+
+        assertThat(mLastFullChargePref.getSubtitle()).isEqualTo("2 hr. ago");
+    }
+
+    @Test
+    public void testUpdatePreference_usageListEmpty_shouldNotCrash() {
+        when(mBatteryHelper.getUsageList()).thenReturn(new ArrayList<BatterySipper>());
+        doReturn(STUB_STRING).when(mFragment).getString(anyInt(), any());
+        doReturn(mRealContext).when(mFragment).getContext();
+
+        // Should not crash when update
+        mFragment.updateScreenPreference();
+    }
+
+    @Test
+    public void testNonIndexableKeys_MatchPreferenceKeys() {
+        final Context context = RuntimeEnvironment.application;
+        final List<String> niks = PowerUsageSummary.SEARCH_INDEX_DATA_PROVIDER
+                .getNonIndexableKeys(context);
+
+        final List<String> keys = XmlTestUtils.getKeysFromPreferenceXml(context,
+                R.xml.power_usage_summary);
+
+        assertThat(keys).containsAllIn(niks);
+    }
+
+    @Test
+    public void testPreferenceControllers_getPreferenceKeys_existInPreferenceScreen() {
+        final Context context = RuntimeEnvironment.application;
+        final PowerUsageSummary fragment = new PowerUsageSummary();
+        final List<String> preferenceScreenKeys = XmlTestUtils.getKeysFromPreferenceXml(context,
+                fragment.getPreferenceScreenResId());
+        final List<String> preferenceKeys = new ArrayList<>();
+
+        for (AbstractPreferenceController controller : fragment.getPreferenceControllers(context)) {
+            preferenceKeys.add(controller.getPreferenceKey());
+        }
+
+        assertThat(preferenceScreenKeys).containsAllIn(preferenceKeys);
+    }
+
+    @Test
+    public void testUpdateAnomalySparseArray() {
+        mFragment.mAnomalySparseArray = new SparseArray<>();
+        final List<Anomaly> anomalies = new ArrayList<>();
+        final Anomaly anomaly1 = new Anomaly.Builder().setUid(UID).build();
+        final Anomaly anomaly2 = new Anomaly.Builder().setUid(UID).build();
+        final Anomaly anomaly3 = new Anomaly.Builder().setUid(UID_2).build();
+        anomalies.add(anomaly1);
+        anomalies.add(anomaly2);
+        anomalies.add(anomaly3);
+
+        mFragment.updateAnomalySparseArray(anomalies);
+
+        assertThat(mFragment.mAnomalySparseArray.get(UID)).containsExactly(anomaly1, anomaly2);
+        assertThat(mFragment.mAnomalySparseArray.get(UID_2)).containsExactly(anomaly3);
+    }
+
+    @Test
+    public void testInitAnomalyDetectionIfPossible_detectionEnabled_init() {
+        doReturn(mLoaderManager).when(mFragment).getLoaderManager();
+        doReturn(mAnomalyDetectionPolicy).when(mFragment).getAnomalyDetectionPolicy();
+        when(mAnomalyDetectionPolicy.isAnomalyDetectionEnabled()).thenReturn(true);
+
+        mFragment.restartAnomalyDetectionIfPossible();
+
+        verify(mLoaderManager).restartLoader(eq(PowerUsageSummary.ANOMALY_LOADER), eq(Bundle.EMPTY),
+                any());
+    }
+
+    @Test
+    public void testShowBothEstimates_summariesAreBothModified() {
+        doReturn(new TextView(mRealContext)).when(mBatteryLayoutPref).findViewById(R.id.summary2);
+        doReturn(new TextView(mRealContext)).when(mBatteryLayoutPref).findViewById(R.id.summary1);
+        mFragment.onLongClick(new View(mRealContext));
+        TextView summary1 = mFragment.mBatteryLayoutPref.findViewById(R.id.summary1);
+        TextView summary2 = mFragment.mBatteryLayoutPref.findViewById(R.id.summary2);
+        Robolectric.flushBackgroundThreadScheduler();
+        assertThat(summary2.getText().toString().contains(NEW_ML_EST_SUFFIX));
+        assertThat(summary1.getText().toString().contains(OLD_EST_SUFFIX));
+    }
+
+    @Test
+    public void testSaveInstanceState_showAllAppsRestored() {
+        Bundle bundle = new Bundle();
+        mFragment.mShowAllApps = true;
+        doReturn(mPreferenceScreen).when(mFragment).getPreferenceScreen();
+
+        mFragment.onSaveInstanceState(bundle);
+        mFragment.restoreSavedInstance(bundle);
+
+        assertThat(mFragment.mShowAllApps).isTrue();
+    }
+
+    @Test
+    public void testDebugMode() {
+        doReturn(true).when(mFeatureFactory.powerUsageFeatureProvider).isEstimateDebugEnabled();
+
+        mFragment.restartBatteryInfoLoader();
+        ArgumentCaptor<View.OnLongClickListener> listener = ArgumentCaptor.forClass(
+                View.OnLongClickListener.class);
+        verify(mSummary1).setOnLongClickListener(listener.capture());
+
+        // Calling the listener should disable it.
+        listener.getValue().onLongClick(mSummary1);
+        verify(mSummary1).setOnLongClickListener(null);
+
+        // Restarting the loader should reset the listener.
+        mFragment.restartBatteryInfoLoader();
+        verify(mSummary1, times(2)).setOnLongClickListener(any(View.OnLongClickListener.class));
+    }
+
+    @Test
+    public void testRestartBatteryStatsLoader_notClearHeader_quickUpdateNotInvoked() {
+        mFragment.mBatteryHeaderPreferenceController = mBatteryHeaderPreferenceController;
+
+        mFragment.restartBatteryStatsLoader(false /* clearHeader */);
+
+        verify(mBatteryHeaderPreferenceController, never()).quickUpdateHeaderPreference();
+    }
+
+    public static class TestFragment extends PowerUsageSummary {
+        private Context mContext;
+
+        public TestFragment(Context context) {
+            mContext = context;
+        }
+
+        @Override
+        public Context getContext() {
+            return mContext;
+        }
+
+
+        @Override
+        protected void refreshUi() {
+            // Leave it empty for toggle apps menu test
+        }
+    }
+}