How to REALLY get the navigation bar height in Android

Question

I own a HTC One A9 which has the ability to hide the navigation bar. In my app, I need to get the height of the navigation bar and set a padding corresponding to it. Here's my problem now: When I hide the navigation bar, the padding is still being set (even Snapchat has this problem). My question is: Is there alternative code to this one that makes it work?

public static int getNavBarHeight(Context context) {
    int result = 0;
    int resourceId = context.getResources().getIdentifier("navigation_bar_height", "dimen", "android");
    if (resourceId > 0) {
        result = context.getResources().getDimensionPixelSize(resourceId);
    }
    return result;
}

Thanks for your help!

Answer 1

Use following code to get Navigation bar. However, you need to consider Multi window mode as well as whether Navigation bar is at the bottom or on left side or right side of the window.

getNavigationBarHeight(){
    Resources resources = context.getResources();
    int resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
    if (resourceId > 0) {
        return resources.getDimensionPixelSize(resourceId);
    }
    return 0;
}

Answer 2

Here is the simplest answer. You just need to pass the rootView of the activity. The heights will be 0 if the the bars are not shown.

View rootView;
ViewCompat.setOnApplyWindowInsetsListener(rootView, (v, insets) -> {
    final int statusBarHeight = insets.getInsets(WindowInsetsCompat.Type.statusBars()).top; // in px
    final int navigationBarHeight = insets.getInsets(WindowInsetsCompat.Type.navigationBars()).bottom; // in px

    // do something with the heights

    return WindowInsetsCompat.CONSUMED;
});