onTouchEvent() will not be triggered if setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) is invoked

Question

I call

getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) 

when my app starts to make my app able to displa

Answer 1

Have you tried adding code to only show your UI when the state has changed? You have to maintain the last known visibility and only show your UI when you first come into being visible:

int mLastSystemUiVis;

@Override 
public void onSystemUiVisibilityChange(int visibility) {
    int diff = mLastSystemUiVis ^ visibility;
    mLastSystemUiVis = visibility;
    if ((diff&SYSTEM_UI_FLAG_VISIBLE) != 0
            && (visibility&SYSTEM_UI_FLAG_VISIBLE) == 0) {
        // DISPLAY YOUR UI
    }
}

Code sample adopted from the Android docs