| // Copyright 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package org.chromium.base; |
| |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.os.BatteryManager; |
| |
| import org.chromium.base.annotations.CalledByNative; |
| import org.chromium.base.annotations.JNINamespace; |
| |
| /** |
| * Integrates native PowerMonitor with the java side. |
| */ |
| @JNINamespace("base::android") |
| public class PowerMonitor { |
| private static PowerMonitor sInstance; |
| |
| private boolean mIsBatteryPower; |
| |
| public static void createForTests() { |
| // Applications will create this once the JNI side has been fully wired up both sides. For |
| // tests, we just need native -> java, that is, we don't need to notify java -> native on |
| // creation. |
| sInstance = new PowerMonitor(); |
| } |
| |
| /** |
| * Create a PowerMonitor instance if none exists. |
| */ |
| public static void create() { |
| ThreadUtils.assertOnUiThread(); |
| |
| if (sInstance != null) return; |
| |
| Context context = ContextUtils.getApplicationContext(); |
| sInstance = new PowerMonitor(); |
| IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); |
| Intent batteryStatusIntent = context.registerReceiver(null, ifilter); |
| if (batteryStatusIntent != null) onBatteryChargingChanged(batteryStatusIntent); |
| |
| IntentFilter powerConnectedFilter = new IntentFilter(); |
| powerConnectedFilter.addAction(Intent.ACTION_POWER_CONNECTED); |
| powerConnectedFilter.addAction(Intent.ACTION_POWER_DISCONNECTED); |
| context.registerReceiver(new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| PowerMonitor.onBatteryChargingChanged(intent); |
| } |
| }, powerConnectedFilter); |
| } |
| |
| private PowerMonitor() { |
| } |
| |
| private static void onBatteryChargingChanged(Intent intent) { |
| assert sInstance != null; |
| int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1); |
| // If we're not plugged, assume we're running on battery power. |
| sInstance.mIsBatteryPower = chargePlug != BatteryManager.BATTERY_PLUGGED_USB |
| && chargePlug != BatteryManager.BATTERY_PLUGGED_AC; |
| nativeOnBatteryChargingChanged(); |
| } |
| |
| @CalledByNative |
| private static boolean isBatteryPower() { |
| // Creation of the PowerMonitor can be deferred based on the browser startup path. If the |
| // battery power is requested prior to the browser triggering the creation, force it to be |
| // created now. |
| if (sInstance == null) create(); |
| |
| return sInstance.mIsBatteryPower; |
| } |
| |
| private static native void nativeOnBatteryChargingChanged(); |
| } |