Android 指定目录下查询apk文件

private List myFiles = new ArrayList();

public List getMyFiles() {

     return myFiles;

}

/**

 * @param args

  *            运用递归的思想，递归去找每个目录下面的apk文件 
 * @return 
 * @throws Exception

  */

public List FindAllAPKFile(File file) throws Exception {

     // 手机上的文件,目前只判断SD卡上的APK文件

     // file = Environment.getDataDirectory();

     // SD卡上的文件目录

     if (file.isFile()) {

        String name_s = file.getName();

        MyFile myFile = new MyFile();

         String apk_path = null;

         // MimeTypeMap.getSingleton()

         if (name_s.toLowerCase().endsWith(".apk")) {

             apk_path = file.getAbsolutePath();// apk文件的绝对路劲

             // System.out.println("----" + file.getAbsolutePath() + "" +

             // name_s);

            PackageManager pm = context.getPackageManager();

             PackageInfo packageInfo = pm.getPackageArchiveInfo(apk_path, PackageManager.GET_ACTIVITIES);

             ApplicationInfo appInfo = packageInfo.applicationInfo;


             //apk or pkg?
             myFile.setAppOrPkg(0);   

              /**获取apk的图标 */

             appInfo.sourceDir = apk_path;

             appInfo.publicSourceDir = apk_path;

             Drawable apk_icon = appInfo.loadIcon(pm);

             myFile.setApk_icon(apk_icon);

             /** 得到包名 */

             String packageName = packageInfo.packageName;

            myFile.setPackageName(packageName); 
            
            String appname = appInfo.loadLabel(pm).toString();
            myFile.setAppName(appname);

             /** apk的绝对路劲 */

             myFile.setFilePath(file.getAbsolutePath());

            /** apk的版本名称 String */

             String versionName = packageInfo.versionName;

             myFile.setVersionName(versionName);

             /** apk的版本号码 int */

             int versionCode = packageInfo.versionCode;

             myFile.setVersionCode(versionCode);

             myFiles.add(myFile);

         } else {

         File[] files = file.listFiles();

         if (files != null && files.length > 0) {

             for (File file_str : files) {

                 FindAllAPKFile(file_str);

            }

         }

     } 
    
     return myFiles;
 }