About the screen on in android application

Question

I have an Android application and I want to keep the screen on. But sometimes I don't want to keep the screen on. What can I do to that?

EDIT: I have already used this code to set my screen on:

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

Answer 1

See the docs - either

android:keepScreenOn="true"

in layout or programatically

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

https://developer.android.com/training/scheduling/wakelock.html

Answer 2

Your question is not clear, but I guess you are looking for this. You can do this grammatically.

Keep Screen Awake

or Add this to your layout

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

Answer 3

Find the root layout of the activity. for example if the root layout is a LinearLayout

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_xml);
    LinearLayout root = (LinearLayout) findViewById(R.id.root_container):

    // and according to your preference you can set 
    root.setKeepScreenOn(true/false);

offical doc says

 /**
 * Controls whether the screen should remain on, modifying the
 * value of {@link #KEEP_SCREEN_ON}.
 *
 * @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}.
 *
 * @see #getKeepScreenOn()

 */

For more reference please follow this link

Answer 4

当您需要应用程序不打开屏幕时，可以使用以下代码清除FLAG_KEEP_SCREEN_ON标志：

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

Answer 5

You should use this:

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

and then :

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

Hope this helps.