1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.settings.fuelgauge; 18 19 import static android.os.PowerManager.ACTION_POWER_SAVE_MODE_CHANGING; 20 21 import android.content.BroadcastReceiver; 22 import android.content.ContentResolver; 23 import android.content.Context; 24 import android.content.Intent; 25 import android.content.IntentFilter; 26 import android.content.res.Resources; 27 import android.database.ContentObserver; 28 import android.net.Uri; 29 import android.os.AsyncTask; 30 import android.os.Bundle; 31 import android.os.Handler; 32 import android.os.PowerManager; 33 import android.provider.Settings.Global; 34 import android.util.Log; 35 import android.widget.Switch; 36 37 import com.android.settings.R; 38 import com.android.settings.SettingsActivity; 39 import com.android.settings.SettingsPreferenceFragment; 40 import com.android.settings.Utils; 41 import com.android.settings.notification.SettingPref; 42 import com.android.settings.widget.SwitchBar; 43 44 public class BatterySaverSettings extends SettingsPreferenceFragment 45 implements SwitchBar.OnSwitchChangeListener { 46 private static final String TAG = "BatterySaverSettings"; 47 private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG); 48 private static final String KEY_TURN_ON_AUTOMATICALLY = "turn_on_automatically"; 49 private static final long WAIT_FOR_SWITCH_ANIM = 500; 50 51 private final Handler mHandler = new Handler(); 52 private final SettingsObserver mSettingsObserver = new SettingsObserver(mHandler); 53 private final Receiver mReceiver = new Receiver(); 54 55 private Context mContext; 56 private boolean mCreated; 57 private SettingPref mTriggerPref; 58 private SwitchBar mSwitchBar; 59 private Switch mSwitch; 60 private boolean mValidListener; 61 private PowerManager mPowerManager; 62 63 @Override onActivityCreated(Bundle savedInstanceState)64 public void onActivityCreated(Bundle savedInstanceState) { 65 super.onActivityCreated(savedInstanceState); 66 if (mCreated) { 67 mSwitchBar.show(); 68 return; 69 } 70 mCreated = true; 71 addPreferencesFromResource(R.xml.battery_saver_settings); 72 73 mContext = getActivity(); 74 mSwitchBar = ((SettingsActivity) mContext).getSwitchBar(); 75 mSwitch = mSwitchBar.getSwitch(); 76 mSwitchBar.show(); 77 78 mTriggerPref = new SettingPref(SettingPref.TYPE_GLOBAL, KEY_TURN_ON_AUTOMATICALLY, 79 Global.LOW_POWER_MODE_TRIGGER_LEVEL, 80 0, /*default*/ 81 getResources().getIntArray(R.array.battery_saver_trigger_values)) { 82 @Override 83 protected String getCaption(Resources res, int value) { 84 if (value > 0 && value < 100) { 85 return res.getString(R.string.battery_saver_turn_on_automatically_pct, 86 Utils.formatPercentage(value)); 87 } 88 return res.getString(R.string.battery_saver_turn_on_automatically_never); 89 } 90 }; 91 mTriggerPref.init(this); 92 93 mPowerManager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE); 94 } 95 96 @Override onDestroyView()97 public void onDestroyView() { 98 super.onDestroyView(); 99 mSwitchBar.hide(); 100 } 101 102 @Override onResume()103 public void onResume() { 104 super.onResume(); 105 mSettingsObserver.setListening(true); 106 mReceiver.setListening(true); 107 if (!mValidListener) { 108 mSwitchBar.addOnSwitchChangeListener(this); 109 mValidListener = true; 110 } 111 updateSwitch(); 112 } 113 114 @Override onPause()115 public void onPause() { 116 super.onPause(); 117 mSettingsObserver.setListening(false); 118 mReceiver.setListening(false); 119 if (mValidListener) { 120 mSwitchBar.removeOnSwitchChangeListener(this); 121 mValidListener = false; 122 } 123 } 124 125 @Override onSwitchChanged(Switch switchView, boolean isChecked)126 public void onSwitchChanged(Switch switchView, boolean isChecked) { 127 mHandler.removeCallbacks(mStartMode); 128 if (isChecked) { 129 mHandler.postDelayed(mStartMode, WAIT_FOR_SWITCH_ANIM); 130 } else { 131 if (DEBUG) Log.d(TAG, "Stopping low power mode from settings"); 132 trySetPowerSaveMode(false); 133 } 134 } 135 trySetPowerSaveMode(boolean mode)136 private void trySetPowerSaveMode(boolean mode) { 137 if (!mPowerManager.setPowerSaveMode(mode)) { 138 if (DEBUG) Log.d(TAG, "Setting mode failed, fallback to current value"); 139 mHandler.post(mUpdateSwitch); 140 } 141 } 142 updateSwitch()143 private void updateSwitch() { 144 final boolean mode = mPowerManager.isPowerSaveMode(); 145 if (DEBUG) Log.d(TAG, "updateSwitch: isChecked=" + mSwitch.isChecked() + " mode=" + mode); 146 if (mode == mSwitch.isChecked()) return; 147 148 // set listener to null so that that code below doesn't trigger onCheckedChanged() 149 if (mValidListener) { 150 mSwitchBar.removeOnSwitchChangeListener(this); 151 } 152 mSwitch.setChecked(mode); 153 if (mValidListener) { 154 mSwitchBar.addOnSwitchChangeListener(this); 155 } 156 } 157 158 private final Runnable mUpdateSwitch = new Runnable() { 159 @Override 160 public void run() { 161 updateSwitch(); 162 } 163 }; 164 165 private final Runnable mStartMode = new Runnable() { 166 @Override 167 public void run() { 168 AsyncTask.execute(new Runnable() { 169 @Override 170 public void run() { 171 if (DEBUG) Log.d(TAG, "Starting low power mode from settings"); 172 trySetPowerSaveMode(true); 173 } 174 }); 175 } 176 }; 177 178 private final class Receiver extends BroadcastReceiver { 179 private boolean mRegistered; 180 181 @Override onReceive(Context context, Intent intent)182 public void onReceive(Context context, Intent intent) { 183 if (DEBUG) Log.d(TAG, "Received " + intent.getAction()); 184 mHandler.post(mUpdateSwitch); 185 } 186 setListening(boolean listening)187 public void setListening(boolean listening) { 188 if (listening && !mRegistered) { 189 mContext.registerReceiver(this, new IntentFilter(ACTION_POWER_SAVE_MODE_CHANGING)); 190 mRegistered = true; 191 } else if (!listening && mRegistered) { 192 mContext.unregisterReceiver(this); 193 mRegistered = false; 194 } 195 } 196 } 197 198 private final class SettingsObserver extends ContentObserver { 199 private final Uri LOW_POWER_MODE_TRIGGER_LEVEL_URI 200 = Global.getUriFor(Global.LOW_POWER_MODE_TRIGGER_LEVEL); 201 SettingsObserver(Handler handler)202 public SettingsObserver(Handler handler) { 203 super(handler); 204 } 205 206 @Override onChange(boolean selfChange, Uri uri)207 public void onChange(boolean selfChange, Uri uri) { 208 if (LOW_POWER_MODE_TRIGGER_LEVEL_URI.equals(uri)) { 209 mTriggerPref.update(mContext); 210 } 211 } 212 setListening(boolean listening)213 public void setListening(boolean listening) { 214 final ContentResolver cr = getContentResolver(); 215 if (listening) { 216 cr.registerContentObserver(LOW_POWER_MODE_TRIGGER_LEVEL_URI, false, this); 217 } else { 218 cr.unregisterContentObserver(this); 219 } 220 } 221 } 222 } 223