PowerManagerService如何使用请用代码举例子

PowerManagerService是一个系统级别的服务，它用于管理设备电源的使用和控制。下面是一些使用PowerManagerService的示例代码：

获取PowerManagerService实例

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManagerService pms = pm.getService();

获取电源管理锁

PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "My Tag");
wl.acquire();
// do something
wl.release();

设置屏幕亮度

Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, brightnessValue);

设置屏幕超时时间

Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT, timeoutValue);

监听电池状态变化

IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
registerReceiver(batteryReceiver, filter);

private BroadcastReceiver batteryReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
        int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
        int batteryLevel = (int) ((level / (float) scale) * 100);
        // do something with batteryLevel
    }
};
``