RudenessScreenHelper.java 文件源码

/**
 * 重新计算displayMetrics.xhdpi, 使单位pt重定义为设计稿的相对长度
 * @see #activate()
 *
 * @param context
 * @param designWidth 设计稿的宽度
 */
public static void resetDensity(Context context, float designWidth){
    if(context == null)
        return;

    Point size = new Point();
    ((WindowManager)context.getSystemService(WINDOW_SERVICE)).getDefaultDisplay().getSize(size);

    Resources resources = context.getResources();

    resources.getDisplayMetrics().xdpi = size.x/designWidth*72f;

    DisplayMetrics metrics = getMetricsOnMiui(context.getResources());
    if(metrics != null)
        metrics.xdpi = size.x/designWidth*72f;
}