Developer settings screen for inactive apps

Show a list of apps and allow toggling their active state.

Bug: 20066058
Change-Id: Id81e95c354a579773d39d3e7d7cfa1ff46df29e9

src/com/android/settings/DevelopmentSettings.java

@@ -73,8 +73,10 @@ import android.widget.Switch;
 import android.widget.TextView;
 
 import com.android.internal.logging.MetricsLogger;
+import com.android.settings.fuelgauge.InactiveApps;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settings.search.Indexable;
+import com.android.settings.users.UserDetailsSettings;
 import com.android.settings.widget.SwitchBar;
 
 import java.lang.Process;
@@ -165,6 +167,8 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
     private static final String WIFI_LEGACY_DHCP_CLIENT_KEY = "legacy_dhcp_client";
     private static final String MOBILE_DATA_ALWAYS_ON = "mobile_data_always_on";
 
+    private static final String INACTIVE_APPS_KEY = "inactive_apps";
+
     private static final String OPENGL_TRACES_KEY = "enable_opengl_traces";
 
     private static final String IMMEDIATELY_DESTROY_ACTIVITIES_KEY
@@ -1728,6 +1732,8 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
             writeUseAwesomePlayerOptions();
         } else if (preference == mUSBAudio) {
             writeUSBAudioOptions();
+        } else if (INACTIVE_APPS_KEY.equals(preference.getKey())) {
+            startInactiveAppsFragment();
         } else {
             return super.onPreferenceTreeClick(preferenceScreen, preference);
         }
@@ -1735,6 +1741,12 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
         return false;
     }
 
+    private void startInactiveAppsFragment() {
+        ((SettingsActivity) getActivity()).startPreferencePanel(
+                InactiveApps.class.getName(),
+                null, R.string.inactive_apps_title, null, null, 0);
+    }
+
     private boolean showKeyguardConfirmation(Resources resources, int requestCode) {
         return new ChooseLockSettingsHelper(getActivity(), this).launchConfirmationActivity(
                 requestCode, resources.getString(R.string.oem_unlock_enable));

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

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2015 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.usage.UsageStatsManager;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.Preference.OnPreferenceClickListener;
+import android.preference.PreferenceGroup;
+
+import com.android.settings.InstrumentedFragment;
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+
+import java.util.List;
+
+public class InactiveApps extends SettingsPreferenceFragment implements OnPreferenceClickListener {
+
+    private UsageStatsManager mUsageStats;
+
+    @Override
+    protected int getMetricsCategory() {
+        return InstrumentedFragment.VIEW_CATEGORY_UNDECLARED;
+    }
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        mUsageStats = getActivity().getSystemService(UsageStatsManager.class);
+        addPreferencesFromResource(R.xml.inactive_apps);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        init();
+    }
+
+    private void init() {
+        PreferenceGroup screen = getPreferenceScreen();
+        screen.removeAll();
+        screen.setOrderingAsAdded(false);
+        final Context context = getActivity();
+        final PackageManager pm = context.getPackageManager();
+        final UsageStatsManager usm = context.getSystemService(UsageStatsManager.class);
+
+        Intent launcherIntent = new Intent(Intent.ACTION_MAIN);
+        launcherIntent.addCategory(Intent.CATEGORY_LAUNCHER);
+        List<ResolveInfo> apps = pm.queryIntentActivities(launcherIntent, 0);
+        for (ResolveInfo app : apps) {
+            String packageName = app.activityInfo.applicationInfo.packageName;
+            Preference p = new Preference(context);
+            p.setTitle(app.loadLabel(pm));
+            p.setIcon(app.loadIcon(pm));
+            p.setKey(packageName);
+            updateSummary(p);
+            p.setOnPreferenceClickListener(this);
+
+            screen.addPreference(p);
+        }
+    }
+
+    private void updateSummary(Preference p) {
+        boolean inactive = mUsageStats.isAppInactive(p.getKey());
+        p.setSummary(inactive
+                ? R.string.inactive_app_inactive_summary
+                : R.string.inactive_app_active_summary);
+    }
+
+    @Override
+    public boolean onPreferenceClick(Preference preference) {
+        String packageName = preference.getKey();
+        mUsageStats.setAppInactive(packageName, !mUsageStats.isAppInactive(packageName));
+        updateSummary(preference);
+        return false;
+    }
+}