android ApplicationInfo类

1）获取apk文件的图标

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1. public static Drawable getApkFileIcon(String apkPath, Context context) {  
2.     PackageManager pm = context.getPackageManager();  
3.     PackageInfo info = pm.getPackageArchiveInfo(apkPath,  
4.             PackageManager.GET_ACTIVITIES);  
5.     if (info != null) {  
6.         ApplicationInfo appInfo = info.applicationInfo;  
7.         if (appInfo != null) {  
8.             try {  
9.                 appInfo.publicSourceDir = apkPath;  
10.                 return pm.getApplicationIcon(appInfo);  
11.             } catch (OutOfMemoryError e) {  
12.             }  
13.         }  
14.     }  
15.     return null;  
16.   
17. }  

 

2）获取AndroidManifest.xml中<meta-data>标签中定义的值

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1. PackageManager manager = this.getPackageManager();  
2.   
3. try {  
4.     // 设置PackageManager.GET_META_DATA标识位是必须的  
5.     PackageInfo info = manager.getPackageInfo(this.getPackageName(),  
6.             PackageManager.GET_CONFIGURATIONS | PackageManager.GET_META_DATA);  
7.     Object myChannel = info.applicationInfo.metaData.get("meta-data-key");  
8.   
9.     if ((myChannel != null) && (myChannel instanceof Integer)) {  
10.         // do something  
11.     }  
12.   
13. } catch (NameNotFoundException e) {  
14.     e.printStackTrace();  
15. }