Android根据APP包名启动应用

 1     public void openApp(String packageName, Context context) {
 2         PackageManager packageManager = context.getPackageManager();
 3         Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
 4         resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
 5         resolveIntent.setPackage(packageName);
 6 
 7         List<ResolveInfo> apps = packageManager.queryIntentActivities(
 8                 resolveIntent, 0);
 9 
10         ResolveInfo ri = apps.iterator().next();
11         if (ri != null) {
12             String className = ri.activityInfo.name;
13 
14             Intent intent = new Intent(Intent.ACTION_MAIN);
15             intent.addCategory(Intent.CATEGORY_LAUNCHER);
16             intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
17             ComponentName cn = new ComponentName(packageName, className);
18 
19             intent.setComponent(cn);
20             context.startActivity(intent);
21         }
22     }