public static int getThemeAttr(Context context, int attr) {
        TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
        int theme = ta.getResourceId(0, 0);
        ta.recycle();
        return theme;
    }
This method converts device specific pixels to density independent pixels.

@param px      A value in px (pixels) unit. Which we need to convert into db
@param context Context to get resources and device specific display metrics
@return A float value to represent dp equivalent to px value
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/ResUtils.java