Calculate total device height and width

Question

I want to calculate the total device width and height. I have a device 600x1024 and the following code shows only 552 width when landscape and 972 height portrait.

DisplayMetrics displayMetrics = new DisplayMetrics();  
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);  
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels;

Possible duplicate of [Get Screen width and height](https://stackoverflow.com/questions/4743116/get-screen-width-and-height) — akhil_mittal, May 07 '18 at 07:16

score 0 · Answer 1 · answered May 07 '18 at 07:54

You are getting smaller size because the navigation bar takes some space, and getWindowManager().getDefaultDisplay().getMetrics(displayMetrics) will return only available screen size.

There is no official-documented way to get the full screen size, however there are some workarounds:

You can get the screen size after your acticity enters full-screen mode. This should hide the navbar.

You can get the size of the navbar and add it to the screen size you got in your code:

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

You can get the whole screen size:

public static Point getRealScreenSize(Context context) {
    WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    Display display = windowManager.getDefaultDisplay();
    Point size = new Point();

    if (Build.VERSION.SDK_INT >= 17) {
        display.getRealSize(size);
    } else if (Build.VERSION.SDK_INT >= 14) {
        try {
            size.x = (Integer) Display.class.getMethod("getRawWidth").invoke(display);
            size.y = (Integer) Display.class.getMethod("getRawHeight").invoke(display);
        } catch (IllegalAccessException e) {
        } catch (InvocationTargetException e) {
        } catch (NoSuchMethodException e) {}
    }

    return size;
}

Methods 2 and 3 are hacks, so keep in mind that they have a chance to fail on some devices.

Calculate total device height and width

1 Answers1