Android Navigation Drawer Doesn't Pass onTouchEvent to Activity

Question

I have an Activity which uses the Android NavigationDrawer. When using only fragments (as usual), everything works perfect. But now I

Answer 1

To add on to guy_m 's answer, here is my implementation for a drawer that opens from the right, includes constructors so that it is viewable in the layout editor and also takes into account when a user swipes from past the edge point:

public class CustomDrawerLayout extends DrawerLayout {
View mDrawerListView;
float edge;
int holddown = 0;
static final String TAG = CustomDrawerLayout.class.getSimpleName();

public CustomDrawerLayout(@NonNull Context context) {
    super(context);
    setscreendimensionvals(context);
}

public CustomDrawerLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
    super(context, attrs);
    setscreendimensionvals(context);
}

public CustomDrawerLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    setscreendimensionvals(context);
}

private void setscreendimensionvals(Context context){
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    /*((Activity) context).getWindowManager()
            .getDefaultDisplay()
            .getMetrics(displayMetrics); */
    int width = displayMetrics.widthPixels;
    float density = displayMetrics.density;
    edge = width - (30 * density); // 30 is the edge of the screen where the navigation drawer comes out
    Log.d(TAG,"edge: " + edge);
    Log.d(TAG,"width: " + width);
}
@Override
protected void onFinishInflate() {
    super.onFinishInflate();
    mDrawerListView = findViewById(R.id.drawerconstraint_overworld);
}

@Override
public boolean onTouchEvent(MotionEvent event){
    super.onTouchEvent(event); // need to add action up and a local variable to detect when lifted finger
    //Log.d(TAG,"point: " + event.getX());
    if(event.getX() >= edge && (event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_MOVE)){
        holddown = 1;
        //Log.d(TAG,"hold down");
    }

    if(event.getAction() == MotionEvent.ACTION_UP){
        holddown = 0;
        //Log.d(TAG,"hold up");
    }

    if(holddown == 1){
        return  true;
    }else{
        if(isDrawerOpen(mDrawerListView) || isDrawerVisible(mDrawerListView)){
            return true;
        } else{
            return false;
        }
    }
}

}