Android--获取高清的app图标

只有一个方法。
 1 public synchronized static Drawable getIconFromPackageName(String packageName, Context context) {
 2         PackageManager pm = context.getPackageManager();
 3         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
 4             try {
 5                 PackageInfo pi = pm.getPackageInfo(packageName, 0);
 6                 Context otherAppCtx = context.createPackageContext(packageName, Context.CONTEXT_IGNORE_SECURITY);
 7                 int displayMetrics[] = {DisplayMetrics.DENSITY_XXXHIGH,DisplayMetrics.DENSITY_XXHIGH,DisplayMetrics.DENSITY_XHIGH, DisplayMetrics.DENSITY_HIGH, DisplayMetrics.DENSITY_TV};
 8                 for (int displayMetric : displayMetrics) {
 9                     try {
10                         Drawable d = otherAppCtx.getResources().getDrawableForDensity(pi.applicationInfo.icon, displayMetric);
11                         if (d != null) {
12                             return d;
13                         }
14                     } catch (Resources.NotFoundException e) {
15                         continue;
16                     }
17                 }
18             } catch (Exception e) {
19                 // Handle Error here
20             }
21         }
22         ApplicationInfo appInfo = null;
23         try {
24             appInfo = pm.getApplicationInfo(packageName, 0);
25         } catch (PackageManager.NameNotFoundException e) {
26             return null;
27         }
28         return appInfo.loadIcon(pm);
29     }