CoordinatorLayout status bar padding disappears from ViewPager 2nd page

Question

EDIT of 01/02/2016: Bug should be resolved by applying the code provided by Android Team: https://stackoverflow.com/a/35132144/3397345, see accepted answer

Answer 1

Like sidecarcat, I ran into a similar issue (using v23.1.1). I post here a workaround by using the code of sidecarcat and add some code to remove superflous padding in some cases.

    // in onCreateView: adjust toolbar padding
    final int initialToolbarHeight = mToolbar.getLayoutParams().height;
    final int initialStatusBarHeight = getStatusBarHeight();
    mToolbar.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            int[] locToolbar = new int[2];
            mToolbar.getLocationOnScreen(locToolbar);
            int yToolbar = locToolbar[1];
            int topPaddingToolbar = mToolbar.getPaddingTop();
            if (isAdded()) {
                //normal case : system status bar padding on toolbar : yToolbar = initialStatusBarHeight && topPaddingToolbar = 0
                //abnormal case : no system status bar padding on toolbar -> toolbar behind status bar => add custom padding
                if (yToolbar != initialStatusBarHeight && topPaddingToolbar == 0) {
                    mToolbar.setPadding(0, initialStatusBarHeight, 0, 0);
                    mToolbar.getLayoutParams().height = initialToolbarHeight + initialStatusBarHeight;
                }
                //abnormal case : system status bar padding and custom padding on toolbar -> toolbar with padding too large => remove custom padding
                else if (yToolbar == initialStatusBarHeight && topPaddingToolbar == initialStatusBarHeight) {
                    mToolbar.setPadding(0, 0, 0, 0);
                    mToolbar.getLayoutParams().height = initialToolbarHeight;
                }
            }
        }
    });

    return mRootView;
}

public int getStatusBarHeight() {
    int result = 0;
    int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
    if (resourceId > 0) {
        result = getResources().getDimensionPixelSize(resourceId);
    }
    return result;
}