단위 변환 도구 클래스 -- UnitUtil

/** * Created by peng on 2015/6/16. *         */
public class UnitUtil {


    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;
    }


    public static float convertPixelsToSp(Context context, Float px) {
        float scaledDensity = context.getResources().getDisplayMetrics().scaledDensity;
        return px / scaledDensity;
    }


    public static float convertSpToPixels(Context context, Float sp) {
        float scaledDensity = context.getResources().getDisplayMetrics().scaledDensity;
        return sp * scaledDensity;
    }

}