android dp to px , px to dp

1)  dp -> px

// dp를 px로 변환 (dp를 입력받아 px을 리턴)
    public static float convertDpToPixel(float dp, Context context){
        Resources resources = context.getResources();
        DisplayMetrics metrics = resources.getDisplayMetrics();
        float px = dp * ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
        return px;
    }

 

2) px -> dp

 //px을 dp로 변환 (px을 입력받아 dp를 리턴)
    public static float convertPixelsToDp(float px, Context context){
        Resources resources = context.getResources();
        DisplayMetrics metrics = resources.getDisplayMetrics();
        float dp = px / ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
        return dp;
    }