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     }