保持设备唤醒

保持设备唤醒两种类型：

1、保持屏幕常亮；

2、保持cpu运行；

1、保持屏幕常亮方法;

public class MainActivity extends Activity {  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);  }

getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:keepScreenOn="true">    ...</RelativeLayout>

2、保持cpu运行方法

为了使用唤醒锁，首先需要在应用的 Manifest 清单文件中增加 WAKE_LOCK 权限：

<uses-permission android:name="android.permission.WAKE_LOCK" />

PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);Wakelock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,        "MyWakelockTag");wakeLock.acquire();

可以调用wakelock.release()来释放唤醒锁。当应用使用完毕时，应该释放该唤醒锁，以避免电量过度消耗。

使用WakefulBroadcastReceiver

<receiver android:name=".MyWakefulReceiver"></receiver>

public class MyWakefulReceiver extends WakefulBroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {        // Start the service, keeping the device awake while the service is        // launching. This is the Intent to deliver to the service.        Intent service = new Intent(context, MyIntentService.class);        startWakefulService(context, service);    }}

MyWakefulReceiver.completeWakefulIntent(intent);

参考：

http://hukai.me/android-training-course-in-chinese/background-jobs/scheduling/wake-lock.html