[AndroidTips]Keep Screen On in Android

最新推荐文章于 2025-08-11 21:24:53 发布

iteye_3854

最新推荐文章于 2025-08-11 21:24:53 发布

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分类专栏： Android 文章标签：移动开发

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本文介绍了在Android应用中保持屏幕常亮的两种方法：一是使用PowerManager和WakeLock；二是利用窗口标志FLAG_KEEP_SCREEN_ON。这两种方法均可有效避免因系统自动休眠而导致的屏幕关闭问题。

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Solution 1: use PowerManager and WakeLock

In AndroidManifest.xml:

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

In your Activity:

    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();

Solution 2: use the window flag FLAG_KEEP_SCREEN_ON

Put the following code in your Activity’s onCreate method:

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

        // Set keep screen on
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }

Reference

http://stackoverflow.com/questions/2131948/force-screen-on
http://stackoverflow.com/questions/992508/using-a-wakelock-in-a-service-android-1-5
http://stackoverflow.com/questions/1114270/android-screen-timeout