full screen application android

Question

i have two questions:

1. one how can i run my application in full screen
2. how video players run videos in full screen.

i have tried alot an

Answer 1

Android Version: 4.2.2 - Device: Vega Tablet

Android App to Hide Status and System Bar and displaying complete screen I followed these steps.

AndroidManifest.xml

MainActivity.java

super.onCreate(savedInstanceState);
getWindow().getDecorView().setSystemUiVisibility(0x10);
setContentView(R.layout.activity_main);

Above code perfectly worked for my app.