如果你知道如何启动应用程序，然后创建启动您的应用的意图，然后调用queryIntentActivities

If you know how to launch the app, then create the intent that launches your app and then call queryIntentActivities

 Intent intent = //your app launching intent goes here
 PackageManager packageManager = mContext.getPackageManager();
 List<ResolveInfo> resolvedActivities = packageManager.queryIntentActivities(intent,0);
 if(resolvedActivities.size() >0)
     \\present