1、唤醒屏幕

 use PowerManager and WakeLockAndroidManifest.xml权限:

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

程序中的代码:

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock mWakeLock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");


// in onResume() call
mWakeLock.acquire();

...

// in onPause() call
mWakeLock.release(); 

2、保持屏幕唤醒

use the window flag FLAG_KEEP_SCREEN_ON把下面的代码加入到程序onCreate方法中

@Override
protected void onCreate(Bundle icicle) {
    super.onCreate(icicle);
// Set keep screen on

       getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}