Converting pixels to dpi for mdpi and hdpi screens

Question

I am using this code that I have found on another thread which is working fine on mdpi screens:

public static float convertDpToPixel(float dp,Context context){
        Resources resources = context.getResources();
        DisplayMetrics metrics = resources.getDisplayMetrics();
        float px = dp * (metrics.densityDpi/160f);
        return px;
    }

public static float convertPixelsToDp(float px,Context context){
        Resources resources = context.getResources();
        DisplayMetrics metrics = resources.getDisplayMetrics();
        float dp = px / (metrics.densityDpi /160f);
        return dp;

    }

When using it on hdpi screens the text size jumps when trying to increase the text size. I am assuming its because it is using the hardcoded 160f when dividing the densityDpi? Is there any dynamic way to determine whether it is 160dpi or 240dpi?

Answer 1

Try this method:

public float dpToPx(float dp, Context context) {
    float density = context.getResources().getDisplayMetrics().density;
    return dp * density;
}