Makoto Onuki | 66a7812 | 2017-11-14 15:03:21 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | package com.android.server.power.batterysaver; |
| 17 | |
| 18 | import android.Manifest; |
| 19 | import android.content.BroadcastReceiver; |
| 20 | import android.content.Context; |
| 21 | import android.content.Intent; |
| 22 | import android.content.IntentFilter; |
| 23 | import android.hardware.power.V1_0.PowerHint; |
| 24 | import android.os.Handler; |
| 25 | import android.os.Looper; |
| 26 | import android.os.Message; |
| 27 | import android.os.PowerManager; |
| 28 | import android.os.PowerManagerInternal.LowPowerModeListener; |
| 29 | import android.os.PowerSaveState; |
| 30 | import android.os.UserHandle; |
| 31 | import android.util.ArrayMap; |
| 32 | import android.util.Slog; |
| 33 | import android.widget.Toast; |
| 34 | |
| 35 | import com.android.internal.annotations.GuardedBy; |
| 36 | import com.android.internal.util.Preconditions; |
| 37 | import com.android.server.power.BatterySaverPolicy; |
| 38 | import com.android.server.power.BatterySaverPolicy.BatterySaverPolicyListener; |
| 39 | import com.android.server.power.PowerManagerService; |
| 40 | |
| 41 | import java.util.ArrayList; |
| 42 | |
| 43 | /** |
| 44 | * Responsible for battery saver mode transition logic. |
| 45 | */ |
| 46 | public class BatterySaverController implements BatterySaverPolicyListener { |
| 47 | static final String TAG = "BatterySaverController"; |
| 48 | |
| 49 | static final boolean DEBUG = false; // DO NOT MERGE WITH TRUE |
| 50 | |
| 51 | private final Object mLock = new Object(); |
| 52 | private final Context mContext; |
| 53 | private final MyHandler mHandler; |
| 54 | private final FileUpdater mFileUpdater; |
| 55 | |
| 56 | private PowerManager mPowerManager; |
| 57 | |
| 58 | private final BatterySaverPolicy mBatterySaverPolicy; |
| 59 | |
| 60 | @GuardedBy("mLock") |
| 61 | private final ArrayList<LowPowerModeListener> mListeners = new ArrayList<>(); |
| 62 | |
| 63 | @GuardedBy("mLock") |
| 64 | private boolean mEnabled; |
| 65 | |
| 66 | /** |
| 67 | * Keep track of the previous enabled state, which we use to decide when to send broadcasts, |
| 68 | * which we don't want to send only when the screen state changes. |
| 69 | */ |
| 70 | @GuardedBy("mLock") |
| 71 | private boolean mWasEnabled; |
| 72 | |
| 73 | private final BroadcastReceiver mReceiver = new BroadcastReceiver() { |
| 74 | @Override |
| 75 | public void onReceive(Context context, Intent intent) { |
| 76 | switch (intent.getAction()) { |
| 77 | case Intent.ACTION_SCREEN_ON: |
| 78 | case Intent.ACTION_SCREEN_OFF: |
| 79 | mHandler.postStateChanged(); |
| 80 | break; |
| 81 | } |
| 82 | } |
| 83 | }; |
| 84 | |
| 85 | /** |
| 86 | * Constructor. |
| 87 | */ |
| 88 | public BatterySaverController(Context context, Looper looper, BatterySaverPolicy policy) { |
| 89 | mContext = context; |
| 90 | mHandler = new MyHandler(looper); |
| 91 | mBatterySaverPolicy = policy; |
| 92 | mBatterySaverPolicy.addListener(this); |
| 93 | mFileUpdater = new FileUpdater(context); |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Add a listener. |
| 98 | */ |
| 99 | public void addListener(LowPowerModeListener listener) { |
| 100 | synchronized (mLock) { |
| 101 | mListeners.add(listener); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Called by {@link PowerManagerService} on system ready.. |
| 107 | */ |
| 108 | public void systemReady() { |
| 109 | final IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON); |
| 110 | filter.addAction(Intent.ACTION_SCREEN_OFF); |
| 111 | mContext.registerReceiver(mReceiver, filter); |
| 112 | } |
| 113 | |
| 114 | private PowerManager getPowerManager() { |
| 115 | if (mPowerManager == null) { |
| 116 | mPowerManager = |
| 117 | Preconditions.checkNotNull(mContext.getSystemService(PowerManager.class)); |
| 118 | } |
| 119 | return mPowerManager; |
| 120 | } |
| 121 | |
| 122 | @Override |
| 123 | public void onBatterySaverPolicyChanged(BatterySaverPolicy policy) { |
| 124 | mHandler.postStateChanged(); |
| 125 | } |
| 126 | |
| 127 | private class MyHandler extends Handler { |
| 128 | private final int MSG_STATE_CHANGED = 1; |
| 129 | |
| 130 | public MyHandler(Looper looper) { |
| 131 | super(looper); |
| 132 | } |
| 133 | |
| 134 | public void postStateChanged() { |
| 135 | obtainMessage(MSG_STATE_CHANGED).sendToTarget(); |
| 136 | } |
| 137 | |
| 138 | @Override |
| 139 | public void dispatchMessage(Message msg) { |
| 140 | switch (msg.what) { |
| 141 | case MSG_STATE_CHANGED: |
| 142 | handleBatterySaverStateChanged(); |
| 143 | break; |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Called by {@link PowerManagerService} to update the battery saver stete. |
| 150 | */ |
| 151 | public void enableBatterySaver(boolean enable) { |
| 152 | synchronized (mLock) { |
| 153 | if (mEnabled == enable) { |
| 154 | return; |
| 155 | } |
| 156 | mEnabled = enable; |
| 157 | |
| 158 | mHandler.postStateChanged(); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Dispatch power save events to the listeners. |
| 164 | * |
| 165 | * This is always called on the handler thread. |
| 166 | */ |
| 167 | void handleBatterySaverStateChanged() { |
| 168 | final LowPowerModeListener[] listeners; |
| 169 | |
| 170 | final boolean wasEnabled; |
| 171 | final boolean enabled; |
| 172 | final boolean isScreenOn = getPowerManager().isInteractive(); |
| 173 | final ArrayMap<String, String> fileValues; |
| 174 | |
| 175 | synchronized (mLock) { |
| 176 | Slog.i(TAG, "Battery saver enabled: screen on=" + isScreenOn); |
| 177 | |
| 178 | listeners = mListeners.toArray(new LowPowerModeListener[mListeners.size()]); |
| 179 | wasEnabled = mWasEnabled; |
| 180 | enabled = mEnabled; |
| 181 | |
| 182 | if (enabled) { |
| 183 | fileValues = mBatterySaverPolicy.getFileValues(isScreenOn); |
| 184 | } else { |
| 185 | fileValues = null; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | PowerManagerService.powerHintInternal(PowerHint.LOW_POWER, enabled ? 1 : 0); |
| 190 | |
| 191 | if (enabled) { |
| 192 | // STOPSHIP Remove the toast. |
| 193 | Toast.makeText(mContext, |
| 194 | com.android.internal.R.string.battery_saver_warning, |
| 195 | Toast.LENGTH_LONG).show(); |
| 196 | } |
| 197 | |
| 198 | if (fileValues == null || fileValues.size() == 0) { |
| 199 | mFileUpdater.restoreDefault(); |
| 200 | } else { |
| 201 | mFileUpdater.writeFiles(fileValues); |
| 202 | } |
| 203 | |
| 204 | if (enabled != wasEnabled) { |
| 205 | if (DEBUG) { |
| 206 | Slog.i(TAG, "Sending broadcasts for mode: " + enabled); |
| 207 | } |
| 208 | |
| 209 | // Send the broadcasts and notify the listeners. We only do this when the battery saver |
| 210 | // mode changes, but not when only the screen state changes. |
| 211 | Intent intent = new Intent(PowerManager.ACTION_POWER_SAVE_MODE_CHANGING) |
| 212 | .putExtra(PowerManager.EXTRA_POWER_SAVE_MODE, enabled) |
| 213 | .addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); |
| 214 | mContext.sendBroadcast(intent); |
| 215 | |
| 216 | intent = new Intent(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED); |
| 217 | intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); |
| 218 | mContext.sendBroadcastAsUser(intent, UserHandle.ALL); |
| 219 | |
| 220 | // Send internal version that requires signature permission. |
| 221 | intent = new Intent(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED_INTERNAL); |
| 222 | intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); |
| 223 | mContext.sendBroadcastAsUser(intent, UserHandle.ALL, |
| 224 | Manifest.permission.DEVICE_POWER); |
| 225 | |
| 226 | |
| 227 | for (LowPowerModeListener listener : listeners) { |
| 228 | final PowerSaveState result = |
| 229 | mBatterySaverPolicy.getBatterySaverPolicy( |
| 230 | listener.getServiceType(), enabled); |
| 231 | listener.onLowPowerModeChanged(result); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | synchronized (mLock) { |
| 236 | mWasEnabled = enabled; |
| 237 | } |
| 238 | } |
| 239 | } |