How to get android navbar height on NativeScript vanilla

Category: #nativescript


Android provides many different form factors. Of which, some devices come with on screen navigation bar and some don’t. Now, the problem with that is when you want to programmatically setup some absolute layout in code, you need to find out the height of the on screen navigation bar (if present), and sometimes also height or action bar and status bar.

With NativeScript, this code ->


returns false on devices like Samsung Galaxy Note5, and Galaxy J7 (both having permanent menu key). I haven’t tested this code on devices from other manufacturers who have permanent menu key.

So, with a little help from this StackOverflow question, I came up with this set of code, which is working correctly on all the devices that I’ve tested it with so far i.e., note5, j7 and nexus6 on emulator.

Finding out height of Android On Screen Navigation Bar

This code works for both landscape and portrait mode. Here we are checking if there is any difference between real width and displayed width or between real height and displayed height. If there is, then we return that difference after converting it to device independent pixels.

function getNavBarHeight() {
    const app = require("application");
    if( {
        let navBarHeight = 0;
        let windowManager =
        let d = windowManager.getDefaultDisplay();
        let realDisplayMetrics = new android.util.DisplayMetrics();
        let realHeight = realDisplayMetrics.heightPixels;
        let realWidth = realDisplayMetrics.widthPixels;
        let displayMetrics = new android.util.DisplayMetrics();
        let displayHeight = displayMetrics.heightPixels;
        let displayWidth = displayMetrics.widthPixels;

        if((realHeight - displayHeight) > 0) { // Portrait
            navBarHeight = realHeight - displayHeight;
        } else if ((realWidth - displayWidth) > 0) { // Landscape
            navBarHeight = realWidth - displayWidth;

        // Convert to device independent pixels and return
        return (navBarHeight 
    return 0;

Give it a try on playground! Click Here

What are your thoughts on this method? Any suggestions to improve this code? Please comment below :smile:

Written on October 8, 2017