Android--获取高清的app图标

只有一个方法。

public synchronized static Drawable getIconFromPackageName(String packageName, Context context) {
        PackageManager pm = context.getPackageManager();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
            try {
                PackageInfo pi = pm.getPackageInfo(packageName, 0);
                Context otherAppCtx = context.createPackageContext(packageName, Context.CONTEXT_IGNORE_SECURITY);
                int displayMetrics[] = {DisplayMetrics.DENSITY_XXXHIGH,DisplayMetrics.DENSITY_XXHIGH,DisplayMetrics.DENSITY_XHIGH, DisplayMetrics.DENSITY_HIGH, DisplayMetrics.DENSITY_TV};
                for (int displayMetric : displayMetrics) {
                    try {
                        Drawable d = otherAppCtx.getResources().getDrawableForDensity(pi.applicationInfo.icon, displayMetric);
                        if (d != null) {
                            return d;
                        }
                    } catch (Resources.NotFoundException e) {
                        continue;
                    }
                }
            } catch (Exception e) {
                // Handle Error here
            }
        }
        ApplicationInfo appInfo = null;
        try {
            appInfo = pm.getApplicationInfo(packageName, 0);
        } catch (PackageManager.NameNotFoundException e) {
            return null;
        }
        return appInfo.loadIcon(pm);
    }