android获取友盟渠道名以及获取application中的meta-data

获取友盟渠道名

[java]  view plain copy

1. /** 
2.      * 获取渠道名 
3.      * @param ctx 此处习惯性的设置为activity，实际上context就可以 
4.      * @return 如果没有获取成功，那么返回值为空 
5.      */  
6.     public static String getChannelName(Activity ctx) {  
7.         if (ctx == null) {  
8.             return null;  
9.         }  
10.         String channelName = null;  
11.         try {  
12.             PackageManager packageManager = ctx.getPackageManager();  
13.             if (packageManager != null) {  
14.                 //注意此处为ApplicationInfo 而不是 ActivityInfo,因为友盟设置的meta-data是在application标签中，而不是某activity标签中，所以用ApplicationInfo  
15.                 ApplicationInfo applicationInfo = packageManager.getApplicationInfo(ctx.getPackageName(), PackageManager.GET_META_DATA);  
16.                 if (applicationInfo != null) {  
17.                     if (applicationInfo.metaData != null) {  

[java]  view plain copy

1. <span style="white-space:pre">            </span>//key换成说需要的key  
2.                         channelName = applicationInfo.metaData.getString(key);  
3.                     }  
4.                 }  
5.   
6.             }  
7.         } catch (PackageManager.NameNotFoundException e) {  
8.             e.printStackTrace();  
9.         }  
10.         return channelName;  
11.     }  

提取为通用方法：

[java]  view plain copy

1. /** 
2.    * 获取application中指定的meta-data 
3.    * @return 如果没有获取成功(没有对应值，或者异常)，则返回值为空 
4.    */  
5.   public static String getAppMetaData(Context ctx, String key) {  
6.       if (ctx == null || TextUtils.isEmpty(key)) {  
7.           return null;  
8.       }  
9.       String resultData = null;  
10.       try {  
11.           PackageManager packageManager = ctx.getPackageManager();  
12.           if (packageManager != null) {  
13.               ApplicationInfo applicationInfo = packageManager.getApplicationInfo(ctx.getPackageName(), PackageManager.GET_META_DATA);  
14.               if (applicationInfo != null) {  
15.                   if (applicationInfo.metaData != null) {  
16.                       resultData = applicationInfo.metaData.getString(key);  
17.                   }  
18.               }  
19.   
20.           }  
21.       } catch (PackageManager.NameNotFoundException e) {  
22.           e.printStackTrace();  
23.       }  
24.   
25.       return resultData;  
26.   }