Ui changes in battery main page

1. Refine the battery header view
2. Move stats section to the place above power management
3. Add last full charge battery stat
4. Add the disclaimer as a footer

Also update the method name in test file, and this ui changes
also fix the header flash problem.

Bug: 36576021
Bug: 36494178
Test: RunSettingsRoboTests
Change-Id: I9784dbbbe16e61da7287f300183347dd4eee6a2b
(cherry picked from commit edfd09d590)

res/layout/battery_header.xml

@@ -27,44 +27,35 @@
     android:background="@drawable/selectable_card_grey"
     style="@style/EntityHeader">
 
-    <com.android.settings.fuelgauge.BatteryMeterView
-        android:id="@+id/battery_header_icon"
-        android:layout_width="@dimen/battery_meter_width"
-        android:layout_height="@dimen/battery_meter_height"/>
-
     <LinearLayout
-        android:layout_width="wrap_content"
+        android:layout_width="216dp"
         android:layout_height="wrap_content"
-        android:layout_marginStart="12dp"
+        android:layout_marginStart="48dp"
         android:layout_marginEnd="12dp"
         android:orientation="vertical">
 
         <TextView
-            android:id="@+id/time"
+            android:id="@+id/battery_percent"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="12dp"
-            android:gravity="center"
+            android:textAppearance="@android:style/TextAppearance.Material.Display1"/>
-            android:textAppearance="@android:style/TextAppearance.Material.Medium"/>
 
         <TextView
             android:id="@+id/summary1"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="12dp"
-            android:gravity="center"
             android:textAppearance="@android:style/TextAppearance.Material.Small"
             android:text="@string/estimated_time_left"/>
 
-        <TextView
-            android:id="@+id/summary2"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginTop="12dp"
-            android:gravity="center"
-            android:textAppearance="@android:style/TextAppearance.Material.Small"
-            android:text="@string/estimated_time_description"/>
-
     </LinearLayout>
 
+    <com.android.settings.fuelgauge.BatteryMeterView
+        android:id="@+id/battery_header_icon"
+        android:layout_width="@dimen/battery_meter_width"
+        android:layout_height="@dimen/battery_meter_height"
+        android:layout_gravity="end"
+        android:layout_marginEnd="24dp"/>
+
 </LinearLayout>

res/xml/power_usage_summary.xml

@@ -25,6 +25,19 @@
         android:selectable="true"
         android:layout="@layout/battery_header"/>
 
+    <PreferenceCategory
+        android:key="device_usage_list">
+
+        <com.android.settings.fuelgauge.PowerGaugePreference
+            android:key="last_full_charge"
+            android:title="@string/battery_last_full_charge"/>
+
+        <com.android.settings.fuelgauge.PowerGaugePreference
+            android:key="screen_usage"
+            android:title="@string/device_screen_usage"/>
+
+    </PreferenceCategory>
+
     <PreferenceCategory
         android:key="power_management"
         android:title="@string/battery_power_management">
@@ -60,22 +73,4 @@
         android:key="app_list"
         android:title="@string/power_usage_list_summary"/>
 
-    <PreferenceCategory
-        android:key="device_usage_list"
-        android:title="@string/device_usage_list_summary">
-
-        <Preference
-            android:key="screen_usage"
-            android:title="@string/device_screen_usage"/>
-
-        <Preference
-            android:key="screen_consumption"
-            android:title="@string/device_screen_consumption"/>
-
-        <Preference
-            android:key="cellular_network"
-            android:title="@string/device_cellular_network"/>
-
-    </PreferenceCategory>
-
 </PreferenceScreen>

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

@@ -46,7 +46,7 @@ public class BatteryMeterView extends ImageView {
 
         mDrawable = new BatteryMeterDrawable(context, frameColor);
         mDrawable.setColorFilter(new PorterDuffColorFilter(tintColor, PorterDuff.Mode.SRC_IN));
-        mDrawable.setShowPercent(true);
+        mDrawable.setShowPercent(false);
         setImageDrawable(mDrawable);
     }
 

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

@@ -29,8 +29,11 @@ import com.android.settings.TintablePreference;
 import com.android.settings.Utils;
 
 /**
- * Custom preference for displaying power consumption as a bar and an icon on
+ * Custom preference for displaying battery usage info as a bar and an icon on
  * the left for the subsystem/app type.
+ *
+ * The battery usage info could be usage percentage or usage time. The preference
+ * won't show any icon if it is null.
  */
 public class PowerGaugePreference extends TintablePreference {
     private final int mIconSize;
@@ -41,7 +44,20 @@ public class PowerGaugePreference extends TintablePreference {
 
     public PowerGaugePreference(Context context, Drawable icon, CharSequence contentDescription,
             BatteryEntry info) {
-        super(context, null);
+        this(context, null, icon, contentDescription, info);
+    }
+
+    public PowerGaugePreference(Context context) {
+        this(context, null, null, null, null);
+    }
+
+    public PowerGaugePreference(Context context, AttributeSet attrs) {
+        this(context, attrs, null, null, null);
+    }
+
+    private PowerGaugePreference(Context context, AttributeSet attrs, Drawable icon,
+            CharSequence contentDescription, BatteryEntry info) {
+        super(context, attrs);
         setIcon(icon != null ? icon : new ColorDrawable(0));
         setWidgetLayoutResource(R.layout.preference_widget_summary);
         mInfo = info;
@@ -49,10 +65,6 @@ public class PowerGaugePreference extends TintablePreference {
         mIconSize = context.getResources().getDimensionPixelSize(R.dimen.app_icon_size);
     }
 
-    public PowerGaugePreference(Context context) {
-        this(context, null, null, null);
-    }
-
     public void setContentDescription(String name) {
         mContentDescription = name;
         notifyChanged();
@@ -67,6 +79,11 @@ public class PowerGaugePreference extends TintablePreference {
         return mProgress.toString();
     }
 
+    public void setSubtitle(String subtitle) {
+        mProgress = subtitle;
+        notifyChanged();
+    }
+
     BatteryEntry getInfo() {
         return mInfo;
     }

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

@@ -16,7 +16,6 @@
 
 package com.android.settings.fuelgauge;
 
-import android.annotation.StringRes;
 import android.app.Activity;
 import android.content.Context;
 import android.graphics.drawable.Drawable;
@@ -26,6 +25,7 @@ import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.os.Process;
+import android.os.SystemClock;
 import android.os.UserHandle;
 import android.provider.SearchIndexableResource;
 import android.support.annotation.VisibleForTesting;
@@ -39,7 +39,6 @@ import android.util.TypedValue;
 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.MetricsEvent;
@@ -60,6 +59,7 @@ import com.android.settings.display.BatteryPercentagePreferenceController;
 import com.android.settings.display.TimeoutPreferenceController;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settings.widget.FooterPreferenceMixin;
 import com.android.settingslib.BatteryInfo;
 
 import java.util.ArrayList;
@@ -87,8 +87,7 @@ public class PowerUsageSummary extends PowerUsageBase {
     private static final int SECONDS_IN_HOUR = 60 * 60;
 
     private static final String KEY_SCREEN_USAGE = "screen_usage";
-    private static final String KEY_SCREEN_CONSUMPTION = "screen_consumption";
+    private static final String KEY_TIME_SINCE_LAST_FULL_CHARGE = "last_full_charge";
-    private static final String KEY_CELLULAR_NETWORK = "cellular_network";
 
 
     private static final int MENU_STATS_TYPE = Menu.FIRST;
@@ -100,14 +99,15 @@ public class PowerUsageSummary extends PowerUsageBase {
     static final int MENU_TOGGLE_APPS = Menu.FIRST + 5;
     private static final int MENU_HELP = Menu.FIRST + 6;
 
+    private final FooterPreferenceMixin mFooterPreferenceMixin =
+            new FooterPreferenceMixin(this, getLifecycle());
+
     @VisibleForTesting
     boolean mShowAllApps = false;
     @VisibleForTesting
-    Preference mScreenUsagePref;
+    PowerGaugePreference mScreenUsagePref;
     @VisibleForTesting
-    Preference mScreenConsumptionPref;
+    PowerGaugePreference mLastFullChargePref;
-    @VisibleForTesting
-    Preference mCellularNetworkPref;
     @VisibleForTesting
     PowerUsageFeatureProvider mPowerFeatureProvider;
 
@@ -122,9 +122,10 @@ public class PowerUsageSummary extends PowerUsageBase {
 
         mBatteryLayoutPref = (LayoutPreference) findPreference(KEY_BATTERY_HEADER);
         mAppListGroup = (PreferenceGroup) findPreference(KEY_APP_LIST);
-        mScreenUsagePref = findPreference(KEY_SCREEN_USAGE);
+        mScreenUsagePref = (PowerGaugePreference) findPreference(KEY_SCREEN_USAGE);
-        mScreenConsumptionPref = findPreference(KEY_SCREEN_CONSUMPTION);
+        mLastFullChargePref = (PowerGaugePreference) findPreference(
-        mCellularNetworkPref = findPreference(KEY_CELLULAR_NETWORK);
+                KEY_TIME_SINCE_LAST_FULL_CHARGE);
+        mFooterPreferenceMixin.createFooterPreference().setTitle(R.string.battery_footer_summary);
 
         initFeatureProvider();
     }
@@ -417,8 +418,11 @@ public class PowerUsageSummary extends PowerUsageBase {
         final int dischargeAmount = USE_FAKE_DATA ? 5000
                 : stats != null ? stats.getDischargeAmount(mStatsType) : 0;
 
-        updateScreenPreference(dischargeAmount);
+        final long runningTime = calculateRunningTimeBasedOnStatsType();
-        updateCellularPreference(dischargeAmount);
+        updateScreenPreference();
+        updateLastFullChargePreference(runningTime);
+        mAppListGroup.setTitle(getString(R.string.power_usage_list_summary,
+                Utils.formatElapsedTime(context, runningTime, false)));
 
         if (averagePower >= MIN_AVERAGE_POWER_THRESHOLD_MILLI_AMP || USE_FAKE_DATA) {
             final List<BatterySipper> usageList = getCoalescedUsageList(
@@ -527,28 +531,27 @@ public class PowerUsageSummary extends PowerUsageBase {
     }
 
     @VisibleForTesting
-    void updateScreenPreference(final int dischargeAmount) {
+    void updateScreenPreference() {
         final BatterySipper sipper = findBatterySipperByType(
                 mStatsHelper.getUsageList(), DrainType.SCREEN);
         final Context context = getContext();
-        final double totalPowerMah = sipper != null ? sipper.totalPowerMah : 0;
         final long usageTimeMs = sipper != null ? sipper.usageTimeMs : 0;
-        final double percentOfTotal = calculatePercentage(totalPowerMah, dischargeAmount);
 
-        mScreenUsagePref.setSummary(getString(R.string.battery_used_for,
+        mScreenUsagePref.setSubtitle(Utils.formatElapsedTime(context, usageTimeMs, false));
-                Utils.formatElapsedTime(context, usageTimeMs, false)));
-        mScreenConsumptionPref.setSummary(getString(R.string.battery_overall_usage,
-                Utils.formatPercentage(percentOfTotal, true)));
     }
 
     @VisibleForTesting
-    void updateCellularPreference(final int dischargeAmount) {
+    void updateLastFullChargePreference(long timeMs) {
-        final BatterySipper sipper = findBatterySipperByType(
+        mLastFullChargePref.setSubtitle(getString(R.string.power_last_full_charge_summary,
-                mStatsHelper.getUsageList(), DrainType.CELL);
+                Utils.formatElapsedTime(getContext(), timeMs, false)));
-        final double totalPowerMah = sipper != null ? sipper.totalPowerMah : 0;
+    }
-        final double percentOfTotal = calculatePercentage(totalPowerMah, dischargeAmount);
+
-        mCellularNetworkPref.setSummary(getString(R.string.battery_overall_usage,
+    @VisibleForTesting
-                Utils.formatPercentage(percentOfTotal, true)));
+    long calculateRunningTimeBasedOnStatsType() {
+        final long elapsedRealtimeUs = SystemClock.elapsedRealtime() * 1000;
+        // Return the battery time (millisecond) on status mStatsType
+        return mStatsHelper.getStats().computeBatteryRealtime(elapsedRealtimeUs,
+                mStatsType /* STATS_SINCE_CHARGED */) / 1000;
     }
 
     @VisibleForTesting
@@ -559,22 +562,15 @@ public class PowerUsageSummary extends PowerUsageBase {
         }
         final BatteryMeterView batteryView = (BatteryMeterView) mBatteryLayoutPref
                 .findViewById(R.id.battery_header_icon);
-        final TextView timeText = (TextView) mBatteryLayoutPref.findViewById(R.id.time);
+        final TextView timeText = (TextView) mBatteryLayoutPref.findViewById(R.id.battery_percent);
         final TextView summary1 = (TextView) mBatteryLayoutPref.findViewById(R.id.summary1);
-        final TextView summary2 = (TextView) mBatteryLayoutPref.findViewById(R.id.summary2);
+        timeText.setText(Utils.formatPercentage(info.mBatteryLevel));
-        final int visible = info.remainingTimeUs != 0 ? View.VISIBLE : View.INVISIBLE;
+        if (info.remainingLabel == null ) {
-        final int summaryResId = info.mDischarging ?
+            summary1.setText(info.statusLabel);
-                R.string.estimated_time_left : R.string.estimated_charging_time_left;
-
-        if (info.remainingTimeUs != 0) {
-            timeText.setText(Utils.formatElapsedTime(context, info.remainingTimeUs / 1000, false));
         } else {
-            timeText.setText(info.statusLabel);
+            summary1.setText(info.remainingLabel);
         }
 
-        summary1.setText(summaryResId);
-        summary1.setVisibility(visible);
-        summary2.setVisibility(visible);
         batteryView.setBatteryInfo(info.mBatteryLevel);
     }
 

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

@@ -15,19 +15,17 @@
  */
 package com.android.settings.fuelgauge;
 
-import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.os.PowerManager;
 import android.os.Process;
-import android.support.v7.preference.Preference;
 import android.text.TextUtils;
 import android.text.format.DateUtils;
 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;
@@ -40,6 +38,7 @@ import com.android.settings.Utils;
 import com.android.settings.applications.LayoutPreference;
 import com.android.settings.testutils.FakeFeatureFactory;
 import com.android.settingslib.BatteryInfo;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -53,13 +52,15 @@ import org.robolectric.annotation.Config;
 import java.util.ArrayList;
 import java.util.List;
 
-import static com.android.settings.fuelgauge.PowerUsageBase.MENU_STATS_REFRESH;
 import static com.android.settings.fuelgauge.PowerUsageSummary.MENU_ADDITIONAL_BATTERY_INFO;
 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.anyInt;
 import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyLong;
 import static org.mockito.Matchers.anyString;
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.doReturn;
@@ -77,9 +78,13 @@ import static org.mockito.Mockito.when;
 public class PowerUsageSummaryTest {
     private static final String[] PACKAGE_NAMES = {"com.app1", "com.app2"};
     private static final String TIME_LEFT = "2h30min";
+    private static final int BATTERY_LEVEL = 55;
     private static final int UID = 123;
     private static final int POWER_MAH = 100;
     private static final long REMAINING_TIME_US = 100000;
+    private static final long TIME_SINCE_LAST_FULL_CHARGE_MS = 25000;
+    private static final long TIME_SINCE_LAST_FULL_CHARGE_US =
+            TIME_SINCE_LAST_FULL_CHARGE_MS * 1000;
     private static final int DISCHARGE_AMOUNT = 100;
     private static final long USAGE_TIME_MS = 10000;
     private static final double TOTAL_POWER = 200;
@@ -117,20 +122,16 @@ public class PowerUsageSummaryTest {
     @Mock
     private BatteryMeterView mBatteryMeterView;
     @Mock
-    private TextView mTimeText;
+    private TextView mBatteryPercentText;
     @Mock
     private TextView mSummary1;
     @Mock
-    private TextView mSummary2;
-    @Mock
     private BatteryInfo mBatteryInfo;
     @Mock
-    private Preference mScreenUsagePref;
+    private PowerGaugePreference mScreenUsagePref;
-    @Mock
-    private Preference mScreenConsumptionPref;
-    @Mock
-    private Preference mCellularNetworkPref;
     @Mock
+    private PowerGaugePreference mLastFullChargePref;
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
     private BatteryStatsHelper mBatteryHelper;
     @Mock
     private PowerManager mPowerManager;
@@ -162,6 +163,8 @@ public class PowerUsageSummaryTest {
         when(mFeatureFactory.powerUsageFeatureProvider.getAdditionalBatteryInfoIntent())
                 .thenReturn(ADDITIONAL_BATTERY_INFO_INTENT);
         when(mBatteryHelper.getTotalPower()).thenReturn(TOTAL_POWER);
+        when(mBatteryHelper.getStats().computeBatteryRealtime(anyLong(), anyInt())).thenReturn(
+                TIME_SINCE_LAST_FULL_CHARGE_US);
 
         when(mNormalBatterySipper.getPackages()).thenReturn(PACKAGE_NAMES);
         when(mNormalBatterySipper.getUid()).thenReturn(UID);
@@ -172,8 +175,7 @@ public class PowerUsageSummaryTest {
         mCellBatterySipper.totalPowerMah = POWER_MAH;
 
         when(mBatteryLayoutPref.findViewById(R.id.summary1)).thenReturn(mSummary1);
-        when(mBatteryLayoutPref.findViewById(R.id.summary2)).thenReturn(mSummary2);
+        when(mBatteryLayoutPref.findViewById(R.id.battery_percent)).thenReturn(mBatteryPercentText);
-        when(mBatteryLayoutPref.findViewById(R.id.time)).thenReturn(mTimeText);
         when(mBatteryLayoutPref.findViewById(R.id.battery_header_icon))
                 .thenReturn(mBatteryMeterView);
         mFragment.setBatteryLayoutPreference(mBatteryLayoutPref);
@@ -194,8 +196,9 @@ public class PowerUsageSummaryTest {
         mFragment.mStatsHelper = mBatteryHelper;
         when(mBatteryHelper.getUsageList()).thenReturn(mUsageList);
         mFragment.mScreenUsagePref = mScreenUsagePref;
-        mFragment.mScreenConsumptionPref = mScreenConsumptionPref;
+        mFragment.mLastFullChargePref = mLastFullChargePref;
-        mFragment.mCellularNetworkPref = mCellularNetworkPref;
+
+        mBatteryInfo.mBatteryLevel = BATTERY_LEVEL;
     }
 
     @Test
@@ -226,7 +229,7 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testOptionsMenu_MenuHighPower_MetricEventInvoked() {
+    public void testOptionsMenu_menuHighPower_metricEventInvoked() {
         mFragment.onOptionsItemSelected(mHighPowerMenu);
 
         verify(mFeatureFactory.metricsFeatureProvider).action(mContext,
@@ -234,7 +237,7 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testOptionsMenu_MenuAdditionalBattery_MetricEventInvoked() {
+    public void testOptionsMenu_menuAdditionalBattery_metricEventInvoked() {
         mFragment.onOptionsItemSelected(mAdditionalBatteryInfoMenu);
 
         verify(mFeatureFactory.metricsFeatureProvider).action(mContext,
@@ -242,7 +245,7 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testOptionsMenu_MenuAppToggle_MetricEventInvoked() {
+    public void testOptionsMenu_menuAppToggle_metricEventInvoked() {
         mFragment.onOptionsItemSelected(mToggleAppsMenu);
         mFragment.mShowAllApps = false;
 
@@ -251,7 +254,7 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testOptionsMenu_ToggleAppsEnabled() {
+    public void testOptionsMenu_toggleAppsEnabled() {
         when(mFeatureFactory.powerUsageFeatureProvider.isPowerAccountingToggleEnabled())
                 .thenReturn(true);
         mFragment.mShowAllApps = false;
@@ -262,13 +265,13 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testOptionsMenu_ClickToggleAppsMenu_DataChanged() {
+    public void testOptionsMenu_clickToggleAppsMenu_dataChanged() {
         testToggleAllApps(true);
         testToggleAllApps(false);
     }
 
     @Test
-    public void testExtractKeyFromSipper_TypeAPPUidObjectNull_ReturnPackageNames() {
+    public void testExtractKeyFromSipper_typeAPPUidObjectNull_returnPackageNames() {
         mNormalBatterySipper.uidObj = null;
         mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
 
@@ -277,7 +280,7 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testExtractKeyFromSipper_TypeOther_ReturnDrainType() {
+    public void testExtractKeyFromSipper_typeOther_returnDrainType() {
         mNormalBatterySipper.uidObj = null;
         mNormalBatterySipper.drainType = BatterySipper.DrainType.BLUETOOTH;
 
@@ -286,7 +289,7 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testExtractKeyFromSipper_TypeAPPUidObjectNotNull_ReturnUid() {
+    public void testExtractKeyFromSipper_typeAPPUidObjectNotNull_returnUid() {
         mNormalBatterySipper.uidObj = new BatteryStatsImpl.Uid(new BatteryStatsImpl(), UID);
         mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
 
@@ -295,7 +298,7 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testRemoveHiddenBatterySippers_ContainsHiddenSippers_RemoveAndReturnValue() {
+    public void testRemoveHiddenBatterySippers_containsHiddenSippers_removeAndReturnValue() {
         final List<BatterySipper> sippers = new ArrayList<>();
         sippers.add(mNormalBatterySipper);
         sippers.add(mScreenBatterySipper);
@@ -309,37 +312,37 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testShouldHideSipper_TypeIdle_ReturnTrue() {
+    public void testShouldHideSipper_typeIdle_returnTrue() {
         mNormalBatterySipper.drainType = BatterySipper.DrainType.IDLE;
         assertThat(mFragment.shouldHideSipper(mNormalBatterySipper)).isTrue();
     }
 
     @Test
-    public void testShouldHideSipper_TypeWifi_ReturnTrue() {
+    public void testShouldHideSipper_typeWifi_returnTrue() {
         mNormalBatterySipper.drainType = BatterySipper.DrainType.WIFI;
         assertThat(mFragment.shouldHideSipper(mNormalBatterySipper)).isTrue();
     }
 
     @Test
-    public void testShouldHideSipper_TypeCell_ReturnTrue() {
+    public void testShouldHideSipper_typeCell_returnTrue() {
         mNormalBatterySipper.drainType = BatterySipper.DrainType.CELL;
         assertThat(mFragment.shouldHideSipper(mNormalBatterySipper)).isTrue();
     }
 
     @Test
-    public void testShouldHideSipper_TypeScreen_ReturnTrue() {
+    public void testShouldHideSipper_typeScreen_returnTrue() {
         mNormalBatterySipper.drainType = BatterySipper.DrainType.SCREEN;
         assertThat(mFragment.shouldHideSipper(mNormalBatterySipper)).isTrue();
     }
 
     @Test
-    public void testShouldHideSipper_TypeBluetooth_ReturnTrue() {
+    public void testShouldHideSipper_typeBluetooth_returnTrue() {
         mNormalBatterySipper.drainType = BatterySipper.DrainType.BLUETOOTH;
         assertThat(mFragment.shouldHideSipper(mNormalBatterySipper)).isTrue();
     }
 
     @Test
-    public void testShouldHideSipper_TypeSystem_ReturnTrue() {
+    public void testShouldHideSipper_typeSystem_returnTrue() {
         mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
         when(mNormalBatterySipper.getUid()).thenReturn(Process.ROOT_UID);
         when(mFeatureFactory.powerUsageFeatureProvider.isTypeSystem(Matchers.<BatterySipper>any()))
@@ -348,14 +351,14 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testShouldHideSipper_UidNormal_ReturnFalse() {
+    public void testShouldHideSipper_uidNormal_returnFalse() {
         mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
         when(mNormalBatterySipper.getUid()).thenReturn(UID);
         assertThat(mFragment.shouldHideSipper(mNormalBatterySipper)).isFalse();
     }
 
     @Test
-    public void testShouldHideSipper_TypeService_ReturnTrue() {
+    public void testShouldHideSipper_typeService_returnTrue() {
         mNormalBatterySipper.drainType = BatterySipper.DrainType.APP;
         when(mNormalBatterySipper.getUid()).thenReturn(UID);
         when(mFeatureFactory.powerUsageFeatureProvider.isTypeService(Matchers.<BatterySipper>any()))
@@ -365,7 +368,7 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testSetUsageSummary_TimeLessThanOneMinute_DoNotSetSummary() {
+    public void testSetUsageSummary_timeLessThanOneMinute_doNotSetSummary() {
         final long usageTimeMs = 59 * DateUtils.SECOND_IN_MILLIS;
 
         mFragment.setUsageSummary(mPreference, "", usageTimeMs);
@@ -373,7 +376,7 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testSetUsageSummary_TimeMoreThanOneMinute_SetSummary() {
+    public void testSetUsageSummary_timeMoreThanOneMinute_setSummary() {
         final long usageTimeMs = 2 * DateUtils.MINUTE_IN_MILLIS;
 
         mFragment.setUsageSummary(mPreference, "", usageTimeMs);
@@ -381,45 +384,25 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testUpdatePreference_NoEstimatedTime_DoNotShowSummary() {
+    public void testUpdatePreference_hasRemainingTime_showRemainingLabel() {
-        mBatteryInfo.remainingTimeUs = 0;
         mBatteryInfo.remainingLabel = TIME_LEFT;
+
         mFragment.updateHeaderPreference(mBatteryInfo);
 
-        verify(mSummary1).setVisibility(View.INVISIBLE);
+        verify(mSummary1).setText(mBatteryInfo.remainingLabel);
-        verify(mSummary2).setVisibility(View.INVISIBLE);
     }
 
     @Test
-    public void testUpdatePreference_HasEstimatedTime_ShowSummary() {
+    public void testUpdatePreference_noRemainingTime_showStatusLabel() {
-        mBatteryInfo.remainingTimeUs = REMAINING_TIME_US;
+        mBatteryInfo.remainingLabel = null;
-        mBatteryInfo.remainingLabel = TIME_LEFT;
+
         mFragment.updateHeaderPreference(mBatteryInfo);
 
-        verify(mSummary1).setVisibility(View.VISIBLE);
+        verify(mSummary1).setText(mBatteryInfo.statusLabel);
-        verify(mSummary2).setVisibility(View.VISIBLE);
     }
 
     @Test
-    public void testUpdatePreference_Charging_ShowChargingTimeLeft() {
+    public void testUpdateHeaderPreference_asyncUpdate_shouldNotCrash() {
-        mBatteryInfo.remainingTimeUs = REMAINING_TIME_US;
-        mBatteryInfo.mDischarging = false;
-
-        mFragment.updateHeaderPreference(mBatteryInfo);
-        verify(mSummary1).setText(R.string.estimated_charging_time_left);
-    }
-
-    @Test
-    public void testUpdatePreference_NotCharging_ShowTimeLeft() {
-        mBatteryInfo.remainingTimeUs = REMAINING_TIME_US;
-        mBatteryInfo.mDischarging = true;
-
-        mFragment.updateHeaderPreference(mBatteryInfo);
-        verify(mSummary1).setText(R.string.estimated_time_left);
-    }
-
-    @Test
-    public void testUpdateHeaderPreference_AsyncUpdate_ShouldNotCrash() {
         when(mFragment.getContext()).thenReturn(null);
         mBatteryInfo.remainingTimeUs = REMAINING_TIME_US;
 
@@ -451,43 +434,36 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testUpdateCellularPreference_ShowCorrectSummary() {
+    public void testUpdateScreenPreference_showCorrectSummary() {
-        final double percent = POWER_MAH / TOTAL_POWER * DISCHARGE_AMOUNT;
+        final String expectedUsedTime = Utils.formatElapsedTime(mRealContext, USAGE_TIME_MS, false);
-        final String expectedSummary = mRealContext.getString(R.string.battery_overall_usage,
+        doReturn(mScreenBatterySipper).when(mFragment).findBatterySipperByType(any(), any());
-                Utils.formatPercentage((int) percent));
+        doReturn(mRealContext).when(mFragment).getContext();
-        doReturn(expectedSummary).when(mFragment)
-                .getString(eq(R.string.battery_overall_usage), anyInt());
-        mFragment.updateCellularPreference(DISCHARGE_AMOUNT);
 
-        verify(mCellularNetworkPref).setSummary(expectedSummary);
+        mFragment.updateScreenPreference();
+
+        verify(mScreenUsagePref).setSubtitle(expectedUsedTime);
     }
 
     @Test
-    public void testUpdateScreenPreference_ShowCorrectSummary() {
+    public void testUpdateLastFullChargePreference_showCorrectSummary() {
-        final String expectedUsedTime = mRealContext.getString(R.string.battery_used_for,
+        doReturn(mRealContext).when(mFragment).getContext();
-                Utils.formatElapsedTime(mRealContext, USAGE_TIME_MS, false));
+        final String expected = mRealContext.getString(R.string.power_last_full_charge_summary,
-        final double percent = BATTERY_SCREEN_USAGE / TOTAL_POWER * DISCHARGE_AMOUNT;
+                Utils.formatElapsedTime(mRealContext, TIME_SINCE_LAST_FULL_CHARGE_MS, false));
-        final String expectedOverallUsage = mRealContext.getString(R.string.battery_overall_usage,
+        doReturn(expected).when(mFragment).getString(eq(R.string.power_last_full_charge_summary),
-                Utils.formatPercentage((int) percent));
+                any());
-        doReturn(expectedUsedTime).when(mFragment).getString(
-                eq(R.string.battery_used_for), anyInt());
-        doReturn(expectedOverallUsage).when(mFragment).getString(
-                eq(R.string.battery_overall_usage), anyInt());
 
-        mFragment.updateScreenPreference(DISCHARGE_AMOUNT);
+        mFragment.updateLastFullChargePreference(TIME_SINCE_LAST_FULL_CHARGE_MS);
 
-        verify(mScreenUsagePref).setSummary(expectedUsedTime);
+        verify(mLastFullChargePref).setSubtitle(expected);
-        verify(mScreenConsumptionPref).setSummary(expectedOverallUsage);
     }
 
     @Test
-    public void testUpdatePreference_UsageListEmpty_ShouldNotCrash() {
+    public void testUpdatePreference_usageListEmpty_shouldNotCrash() {
         when(mBatteryHelper.getUsageList()).thenReturn(new ArrayList<BatterySipper>());
-        doReturn("").when(mFragment).getString(anyInt(), Matchers.anyObject());
+        doReturn("").when(mFragment).getString(anyInt(), any());
 
         // Should not crash when update
-        mFragment.updateScreenPreference(DISCHARGE_AMOUNT);
+        mFragment.updateScreenPreference();
-        mFragment.updateCellularPreference(DISCHARGE_AMOUNT);
     }
 
     @Test
@@ -496,6 +472,12 @@ public class PowerUsageSummaryTest {
         assertThat(percent).isWithin(PRECISION).of(POWER_USAGE_PERCENTAGE);
     }
 
+    @Test
+    public void testCalculateRunningTimeBasedOnStatsType() {
+        assertThat(mFragment.calculateRunningTimeBasedOnStatsType()).isEqualTo(
+                TIME_SINCE_LAST_FULL_CHARGE_MS);
+    }
+
     public static class TestFragment extends PowerUsageSummary {
 
         private Context mContext;