擒猿小舖

Here is an useful funtion to verify if another app was installed.

1. public Boolean isExistApp(Context context, String appName) {  
2.     PackageInfo packageInfo;  
3.     try {  
4.         packageInfo = context.getPackageManager()  
5.                 .getPackageInfo(appName, 0);  
6.     } catch (NameNotFoundException e) {  
7.         packageInfo = null;  
8.         e.printStackTrace();  
9.     }  
10.     if (packageInfo != null) {  
11.         return true;  
12.     } else {  
13.         return false;  
14.     }  
15. }