Android5.1 电池充电剩余时间计算.docVIP

Android5.1 电池充电剩余时间计算 android5.1手机在充电的时候，并且在锁屏界面的时候会显示还剩多少时间电池充满电。我们就这个机制进行下深入分析： 首先对电池的变化都会监听BatteryService发出的Intent.ACTION_BATTERY_CHANGED广播，因此在framework目录下全局有哪些信誉好的足球投注网站，结果发现在./base/packages/Keyguard/src/com/Android/keyguard/KeyguardUpdateMonitor.Java这个目录下，也就是keyguard中有对这个广播的监控 在KeyguardUpdateMonitor.java这个文件中 [java] view plain copy private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { final String action = intent.getAction(); if (DEBUG) Log.d(TAG, received broadcast + action); if (Intent.ACTION_TIME_TICK.equals(action) || Intent.ACTION_TIME_CHANGED.equals(action) || Intent.ACTION_TIMEZONE_CHANGED.equals(action)) { mHandler.sendEmptyMessage(MSG_TIME_UPDATE); } else if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {//监听电池变化的广播 final int status = intent.getIntExtra(EXTRA_STATUS, BATTERY_STATUS_UNKNOWN); final int plugged = intent.getIntExtra(EXTRA_PLUGGED, 0); final int level = intent.getIntExtra(EXTRA_LEVEL, 0); final int health = intent.getIntExtra(EXTRA_HEALTH, BATTERY_HEALTH_UNKNOWN); final Message msg = mHandler.obtainMessage( MSG_BATTERY_UPDATE, new BatteryStatus(status, level, plugged, health)); mHandler.sendMessage(msg);//发消息 } 接下来我们有哪些信誉好的足球投注网站下MSG_BATTERY_UPDATE这个消息， [java] view plain copy private void handleBatteryUpdate(BatteryStatus status) { if (DEBUG) Log.d(TAG, handleBatteryUpdate); final boolean batteryUpdateInteresting = isBatteryUpdateInteresting(mBatteryStatus, status); mBatteryStatus = status; if (batteryUpdateInteresting) { for (int i = 0; i mCallbacks.size(); i++) { KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get(); if (cb != null) { cb.onRefreshBatteryInfo(status);//接下来我们就搜一下