Keep screen on in Activity - does not work with FLAG_KEEP_SCREEN_ON

android, android-activity, screen, usb-debugging

Solution

i was facing same problem, i was using one activity for my project and all the other screen are fragments then i used the `android:keepScreenOn="true"` in main activity.

please try to use this and let me know if you didn't get your desire result.

Thanks.

Problem

For a long time I thought that I knew how to stop the screen from going into sleep mode, I simply used this code in my Activity: ``` getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); ``` However, I realized that this only worked when my phone was in "developer mode", ie when the USB debugging (Settings --> Developer options --> USB debugging) was enabled/checked. Then the above code indeed stops the screen/device to go to sleep. When that debugging is not checked, then my screen goes to sleep like there's no tomorrow. I am running Android 4.04 on my device, and ``` android:minSdkVersion="12" android:targetSdkVersion="16" ``` Edit I have tested with Commonsware's suggestion, and added the setKeepScreenOn() to the code, so it looks like this: ``` getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); View root = findViewById(android.R.id.content); if (root != null) root.setKeepScreenOn(true); ``` I have also checked so that this code is actually executed, and it is. But it doesn't change a thing.

Original source