Settings: Cleanup battery saver settings

* Add back auto battery saver
* Add back support for battery saver on devices without perf profiles

Change-Id: I562420a81592fde54a96dca88a71ed9137bb59a9

2 files changed, 81 insertions, 236 deletions

diff --git a/src/com/android/settings/fuelgauge/BatterySaverSettings.java b/src/com/android/settings/fuelgauge/BatterySaverSettings.java
deleted file mode 100644
index d8a9ca0..0000000
--- a/src/com/android/settings/fuelgauge/BatterySaverSettings.java
+++ /dev/null
@@ -1,228 +0,0 @@
-/*
- * Copyright (C) 2014 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 android.os.PowerManager.ACTION_POWER_SAVE_MODE_CHANGING;
-
-import android.content.BroadcastReceiver;
-import android.content.ContentResolver;
-import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.content.res.Resources;
-import android.database.ContentObserver;
-import android.net.Uri;
-import android.os.AsyncTask;
-import android.os.Bundle;
-import android.os.Handler;
-import android.os.PowerManager;
-import android.provider.Settings.Global;
-import android.util.Log;
-import android.widget.Switch;
-
-import com.android.internal.logging.MetricsLogger;
-import com.android.settings.R;
-import com.android.settings.SettingsActivity;
-import com.android.settings.SettingsPreferenceFragment;
-import com.android.settings.Utils;
-import com.android.settings.notification.SettingPref;
-import com.android.settings.widget.SwitchBar;
-
-public class BatterySaverSettings extends SettingsPreferenceFragment
-        implements SwitchBar.OnSwitchChangeListener {
-    private static final String TAG = "BatterySaverSettings";
-    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
-    private static final String KEY_TURN_ON_AUTOMATICALLY = "turn_on_automatically";
-    private static final long WAIT_FOR_SWITCH_ANIM = 500;
-
-    private final Handler mHandler = new Handler();
-    private final SettingsObserver mSettingsObserver = new SettingsObserver(mHandler);
-    private final Receiver mReceiver = new Receiver();
-
-    private Context mContext;
-    private boolean mCreated;
-    private SettingPref mTriggerPref;
-    private SwitchBar mSwitchBar;
-    private Switch mSwitch;
-    private boolean mValidListener;
-    private PowerManager mPowerManager;
-
-    @Override
-    protected int getMetricsCategory() {
-        return MetricsLogger.FUELGAUGE_BATTERY_SAVER;
-    }
-
-    @Override
-    public void onActivityCreated(Bundle savedInstanceState) {
-        super.onActivityCreated(savedInstanceState);
-        if (mCreated) {
-            mSwitchBar.show();
-            return;
-        }
-        mCreated = true;
-        addPreferencesFromResource(R.xml.battery_saver_settings);
-
-        mContext = getActivity();
-        mSwitchBar = ((SettingsActivity) mContext).getSwitchBar();
-        mSwitch = mSwitchBar.getSwitch();
-        mSwitchBar.show();
-
-        mTriggerPref = new SettingPref(SettingPref.TYPE_GLOBAL, KEY_TURN_ON_AUTOMATICALLY,
-                Global.LOW_POWER_MODE_TRIGGER_LEVEL,
-                0, /*default*/
-                getResources().getIntArray(R.array.battery_saver_trigger_values)) {
-            @Override
-            protected String getCaption(Resources res, int value) {
-                if (value > 0 && value < 100) {
-                    return res.getString(R.string.battery_saver_turn_on_automatically_pct,
-                                         Utils.formatPercentage(value));
-                }
-                return res.getString(R.string.battery_saver_turn_on_automatically_never);
-            }
-        };
-        mTriggerPref.init(this);
-
-        mPowerManager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
-    }
-
-    @Override
-    public void onDestroyView() {
-        super.onDestroyView();
-        mSwitchBar.hide();
-    }
-
-    @Override
-    public void onResume() {
-        super.onResume();
-        mSettingsObserver.setListening(true);
-        mReceiver.setListening(true);
-        if (!mValidListener) {
-            mSwitchBar.addOnSwitchChangeListener(this);
-            mValidListener = true;
-        }
-        updateSwitch();
-    }
-
-    @Override
-    public void onPause() {
-        super.onPause();
-        mSettingsObserver.setListening(false);
-        mReceiver.setListening(false);
-        if (mValidListener) {
-            mSwitchBar.removeOnSwitchChangeListener(this);
-            mValidListener = false;
-        }
-    }
-
-    @Override
-    public void onSwitchChanged(Switch switchView, boolean isChecked) {
-        mHandler.removeCallbacks(mStartMode);
-        if (isChecked) {
-            mHandler.postDelayed(mStartMode, WAIT_FOR_SWITCH_ANIM);
-        } else {
-            if (DEBUG) Log.d(TAG, "Stopping low power mode from settings");
-            trySetPowerSaveMode(false);
-        }
-    }
-
-    private void trySetPowerSaveMode(boolean mode) {
-        if (!mPowerManager.setPowerSaveMode(mode)) {
-            if (DEBUG) Log.d(TAG, "Setting mode failed, fallback to current value");
-            mHandler.post(mUpdateSwitch);
-        }
-    }
-
-    private void updateSwitch() {
-        final boolean mode = mPowerManager.isPowerSaveMode();
-        if (DEBUG) Log.d(TAG, "updateSwitch: isChecked=" + mSwitch.isChecked() + " mode=" + mode);
-        if (mode == mSwitch.isChecked()) return;
-
-        // set listener to null so that that code below doesn't trigger onCheckedChanged()
-        if (mValidListener) {
-            mSwitchBar.removeOnSwitchChangeListener(this);
-        }
-        mSwitch.setChecked(mode);
-        if (mValidListener) {
-            mSwitchBar.addOnSwitchChangeListener(this);
-        }
-    }
-
-    private final Runnable mUpdateSwitch = new Runnable() {
-        @Override
-        public void run() {
-            updateSwitch();
-        }
-    };
-
-    private final Runnable mStartMode = new Runnable() {
-        @Override
-        public void run() {
-            AsyncTask.execute(new Runnable() {
-                @Override
-                public void run() {
-                    if (DEBUG) Log.d(TAG, "Starting low power mode from settings");
-                    trySetPowerSaveMode(true);
-                }
-            });
-        }
-    };
-
-    private final class Receiver extends BroadcastReceiver {
-        private boolean mRegistered;
-
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            if (DEBUG) Log.d(TAG, "Received " + intent.getAction());
-            mHandler.post(mUpdateSwitch);
-        }
-
-        public void setListening(boolean listening) {
-            if (listening && !mRegistered) {
-                mContext.registerReceiver(this, new IntentFilter(ACTION_POWER_SAVE_MODE_CHANGING));
-                mRegistered = true;
-            } else if (!listening && mRegistered) {
-                mContext.unregisterReceiver(this);
-                mRegistered = false;
-            }
-        }
-    }
-
-    private final class SettingsObserver extends ContentObserver {
-        private final Uri LOW_POWER_MODE_TRIGGER_LEVEL_URI
-                = Global.getUriFor(Global.LOW_POWER_MODE_TRIGGER_LEVEL);
-
-        public SettingsObserver(Handler handler) {
-            super(handler);
-        }
-
-        @Override
-        public void onChange(boolean selfChange, Uri uri) {
-            if (LOW_POWER_MODE_TRIGGER_LEVEL_URI.equals(uri)) {
-                mTriggerPref.update(mContext);
-            }
-        }
-
-        public void setListening(boolean listening) {
-            final ContentResolver cr = getContentResolver();
-            if (listening) {
-                cr.registerContentObserver(LOW_POWER_MODE_TRIGGER_LEVEL_URI, false, this);
-            } else {
-                cr.unregisterContentObserver(this);
-            }
-        }
-    }
-}
diff --git a/src/com/android/settings/fuelgauge/PowerUsageSummary.java b/src/com/android/settings/fuelgauge/PowerUsageSummary.java
index 445896d..8f20bce 100644
--- a/src/com/android/settings/fuelgauge/PowerUsageSummary.java
+++ b/src/com/android/settings/fuelgauge/PowerUsageSummary.java
@@ -18,16 +18,25 @@ package com.android.settings.fuelgauge;
 
 import android.app.Activity;
 import android.graphics.drawable.Drawable;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.res.Resources;
+import android.os.BatteryManager;
 import android.os.BatteryStats;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
+import android.os.PowerManager;
 import android.os.Process;
 import android.os.UserHandle;
 import android.preference.Preference;
 import android.preference.PreferenceGroup;
 import android.preference.PreferenceScreen;
+import android.preference.SwitchPreference;
+import android.provider.Settings;
 import android.text.TextUtils;
 import android.util.SparseArray;
 import android.util.TypedValue;
@@ -63,8 +72,11 @@ public class PowerUsageSummary extends PowerUsageBase {
     static final String TAG = "PowerUsageSummary";
 
     private static final String KEY_APP_LIST = "app_list";
+
     private static final String KEY_BATTERY_HISTORY = "battery_history";
 
+    private static final String KEY_BATTERY_SAVER = "low_power";
+
     private static final int MENU_STATS_TYPE = Menu.FIRST;
     private static final int MENU_BATTERY_SAVER = Menu.FIRST + 2;
     private static final int MENU_HIGH_POWER_APPS = Menu.FIRST + 3;
@@ -73,6 +85,8 @@ public class PowerUsageSummary extends PowerUsageBase {
     private BatteryHistoryPreference mHistPref;
     private PreferenceGroup mAppListGroup;
 
+    private boolean mBatteryPluggedIn;
+
     private int mStatsType = BatteryStats.STATS_SINCE_CHARGED;
 
     private static final int MIN_POWER_THRESHOLD_MILLI_AMP = 5;
@@ -80,6 +94,10 @@ public class PowerUsageSummary extends PowerUsageBase {
     private static final int MIN_AVERAGE_POWER_THRESHOLD_MILLI_AMP = 10;
     private static final int SECONDS_IN_HOUR = 60 * 60;
 
+    private SwitchPreference mBatterySaverPref;
+
+    private PowerManager mPowerManager;
+
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
@@ -87,6 +105,9 @@ public class PowerUsageSummary extends PowerUsageBase {
         addPreferencesFromResource(R.xml.power_usage_summary);
         mHistPref = (BatteryHistoryPreference) findPreference(KEY_BATTERY_HISTORY);
         mAppListGroup = (PreferenceGroup) findPreference(KEY_APP_LIST);
+        mBatterySaverPref = (SwitchPreference) findPreference(KEY_BATTERY_SAVER);
+
+        mPowerManager = (PowerManager)getSystemService(Context.POWER_SERVICE);
     }
 
     @Override
@@ -98,6 +119,10 @@ public class PowerUsageSummary extends PowerUsageBase {
     public void onResume() {
         super.onResume();
         refreshStats();
+
+        if (mBatterySaverPref != null) {
+            refreshBatterySaverOptions();
+        }
     }
 
     @Override
@@ -118,7 +143,7 @@ public class PowerUsageSummary extends PowerUsageBase {
     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
         if (!(preference instanceof PowerGaugePreference)) {
-            return false;
+            return super.onPreferenceTreeClick(preferenceScreen, preference);
         }
         PowerGaugePreference pgp = (PowerGaugePreference) preference;
         BatteryEntry entry = pgp.getInfo();
@@ -143,11 +168,6 @@ public class PowerUsageSummary extends PowerUsageBase {
     }
 
     @Override
-    protected int getHelpResource() {
-        return R.string.help_url_battery;
-    }
-
-    @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         final SettingsActivity sa = (SettingsActivity) getActivity();
         switch (item.getItemId()) {
@@ -160,8 +180,44 @@ public class PowerUsageSummary extends PowerUsageBase {
                 refreshStats();
                 return true;
             case MENU_BATTERY_SAVER:
-                sa.startPreferencePanel(BatterySaverSettings.class.getName(), null,
-                        R.string.battery_saver, null, null, 0);
+                Resources res = getResources();
+
+                final int defWarnLevel = res.getInteger(
+                        com.android.internal.R.integer.config_lowBatteryWarningLevel);
+                final int value = Settings.Global.getInt(getContentResolver(),
+                        Settings.Global.LOW_POWER_MODE_TRIGGER_LEVEL, defWarnLevel);
+
+                int selectedIndex = -1;
+                final int[] intVals = res.getIntArray(R.array.battery_saver_trigger_values);
+                String[] strVals = new String[intVals.length];
+                for (int i = 0; i < intVals.length; i++) {
+                    if (intVals[i] == value) {
+                        selectedIndex = i;
+                    }
+                    if (intVals[i] > 0 && intVals[i] < 100) {
+                        strVals[i] = res.getString(R.string.battery_saver_turn_on_automatically_pct,
+                                intVals[i]);
+                    } else {
+                        strVals[i] =
+                                res.getString(R.string.battery_saver_turn_on_automatically_never);
+                    }
+                }
+
+                AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
+                        .setTitle(R.string.battery_saver_turn_on_automatically_title)
+                        .setSingleChoiceItems(strVals,
+                                selectedIndex,
+                                new DialogInterface.OnClickListener() {
+                                    @Override
+                                    public void onClick(DialogInterface dialog, int which) {
+                                        Settings.Global.putInt(getContentResolver(),
+                                                Settings.Global.LOW_POWER_MODE_TRIGGER_LEVEL,
+                                                intVals[which]);
+                                    }
+                                })
+                        .setPositiveButton(R.string.okay, null);
+                builder.create().show();
+
                 return true;
             case MENU_HIGH_POWER_APPS:
                 Bundle args = new Bundle();
@@ -181,6 +237,16 @@ public class PowerUsageSummary extends PowerUsageBase {
         mAppListGroup.addPreference(notAvailable);
     }
 
+    private void refreshBatterySaverOptions() {
+        if (mBatterySaverPref != null) {
+            mBatterySaverPref.setEnabled(!mBatteryPluggedIn);
+            mBatterySaverPref.setChecked(!mBatteryPluggedIn && mPowerManager.isPowerSaveMode());
+            mBatterySaverPref.setSummary(mBatteryPluggedIn
+                    ? R.string.battery_saver_summary_unavailable
+                    : R.string.battery_saver_summary);
+        }
+    }
+
     private static boolean isSharedGid(int uid) {
         return UserHandle.getAppIdFromSharedAppGid(uid) > 0;
     }
@@ -189,6 +255,13 @@ public class PowerUsageSummary extends PowerUsageBase {
         return uid >= Process.SYSTEM_UID && uid < Process.FIRST_APPLICATION_UID;
     }
 
+    private boolean isBatteryPluggedIn(Intent intent) {
+        int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS,
+                BatteryManager.BATTERY_STATUS_UNKNOWN);
+        return status == BatteryManager.BATTERY_STATUS_CHARGING
+                || status == BatteryManager.BATTERY_STATUS_FULL;
+    }
+
     /**
      * 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