1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file 5 * except in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the 10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 11 * KIND, either express or implied. See the License for the specific language governing 12 * permissions and limitations under the License. 13 */ 14 15 package com.android.settings.fuelgauge; 16 17 import android.content.Context; 18 import android.database.ContentObserver; 19 import android.os.Handler; 20 import android.os.PowerManager; 21 import android.provider.Settings; 22 import android.provider.Settings.Global; 23 import android.support.v7.preference.Preference; 24 import android.util.AttributeSet; 25 import android.view.View; 26 import com.android.settings.R; 27 import com.android.settings.Utils; 28 29 public class BatterySaverPreference extends Preference { 30 31 private PowerManager mPowerManager; 32 BatterySaverPreference(Context context, AttributeSet attrs)33 public BatterySaverPreference(Context context, AttributeSet attrs) { 34 super(context, attrs); 35 } 36 37 @Override performClick(View view)38 protected void performClick(View view) { 39 Utils.startWithFragment(getContext(), getFragment(), null, null, 0, 0, getTitle()); 40 } 41 42 @Override onAttached()43 public void onAttached() { 44 super.onAttached(); 45 mPowerManager = (PowerManager) getContext().getSystemService(Context.POWER_SERVICE); 46 mObserver.onChange(true); 47 getContext().getContentResolver().registerContentObserver( 48 Settings.Global.getUriFor(Global.LOW_POWER_MODE_TRIGGER_LEVEL), true, mObserver); 49 getContext().getContentResolver().registerContentObserver( 50 Settings.Global.getUriFor(Global.LOW_POWER_MODE), true, mObserver); 51 } 52 53 @Override onDetached()54 public void onDetached() { 55 super.onDetached(); 56 getContext().getContentResolver().unregisterContentObserver(mObserver); 57 } 58 updateSwitch()59 private void updateSwitch() { 60 final Context context = getContext(); 61 final boolean mode = mPowerManager.isPowerSaveMode(); 62 int format = mode ? R.string.battery_saver_on_summary 63 : R.string.battery_saver_off_summary; 64 int percent = Settings.Global.getInt(context.getContentResolver(), 65 Global.LOW_POWER_MODE_TRIGGER_LEVEL, 0); 66 int percentFormat = percent > 0 ? R.string.battery_saver_desc_turn_on_auto_pct 67 : R.string.battery_saver_desc_turn_on_auto_never; 68 setSummary(context.getString(format, context.getString(percentFormat, 69 Utils.formatPercentage(percent)))); 70 } 71 72 private final ContentObserver mObserver = new ContentObserver(new Handler()) { 73 @Override 74 public void onChange(boolean selfChange) { 75 updateSwitch(); 76 } 77 }; 78 79 } 80