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

I think you cant hide the system bar in android 4.0 > (only in tablets, in phones you should be able to)

What you can do is to hide the icons and to disable some buttons(everyone except home)

You can try this:

        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE);              

        }

Also for disabling the buttons:

This is for back button:

  public boolean onKeyDown(int keyCode, KeyEvent event) {
    return false;
  }

This for the menu:

@Override
public void onWindowFocusChanged(boolean hasFocus) {

        try
        {
           if(!hasFocus)
           {
                Object service  = getSystemService("statusbar");
                Class statusbarManager = Class.forName("android.app.StatusBarManager");
                Method collapse = statusbarManager.getMethod("collapse");
                collapse .setAccessible(true);
                collapse .invoke(service);
           }
        }
        catch(Exception ex)
        {
        }

}