android单位转换工具

public class DisplayUtil {
    /**
     * px转换为dip或dp
     */
    public static int px2dip(Context context,float pxValue){
        final float scale=context.getResources().getDisplayMetrics().density;
        return (int) (pxValue/scale+0.5f);
    }

    /**
     * 将dip或dp值转换为px
     */
    public static int dip2px(Context context,float dipValue){
        final float scale=context.getResources().getDisplayMetrics().density;
        return (int) (dipValue*scale+0.5f);
    }

    /**
     * 将px值转换为sp
     */
    public static int px2sp(Context context,float pxValue){
        final float fontScale=context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (pxValue/fontScale+0.5f);
    }

    /**
     * 将sp值转换为px
     */
    public static int sp2px(Context context,float spValue){
        final float fontScale=context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (spValue*fontScale+0.5f);
    }
}