让屏幕保持一直亮

 @Override
    protected void onCreate(Bundle icicle) {
        super.onCreate(icicle);

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

最好别用

PowerManager and the WAKE_LOCK permission
 
AndroidManifest.xml:
<uses-permission android:name="android.permission.WAKE_LOCK" /> 
 
 Activity:
 
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); PowerManager.WakeLock mWakeLock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag"); mWakeLock.acquire(); // ... mWakeLock.release();
 
因为此种方法在周期循环的时候会出现异常