Android--px（像素）和dp、sp之间的相互转化

public class DensityUtil {
    public DensityUtil() {
    }

    public static int dip2px(Context var0, float var1) {
        float var2 = var0.getResources().getDisplayMetrics().density;
        return (int)(var1 * var2 + 0.5F);
    }

    public static int px2dip(Context var0, float var1) {
        float var2 = var0.getResources().getDisplayMetrics().density;
        return (int)(var1 / var2 + 0.5F);
    }

    public static int sp2px(Context var0, float var1) {
        float var2 = var0.getResources().getDisplayMetrics().scaledDensity;
        return (int)(var1 * var2 + 0.5F);
    }

    public static int px2sp(Context var0, float var1) {
        float var2 = var0.getResources().getDisplayMetrics().scaledDensity;
        return (int)(var1 / var2 + 0.5F);
    }
}