assets文件夹下文件目录复制到SD卡下

    private void copyDir(String path) {  

      

     String[] files;  

     try {  

     files = this.getAssets().list(path);  

     if (files.length == 0) {  

     copyFile(path);  

     } else {  

     String filePath = "mnt/sdcard" + "/" + path;  

     File file = new File(filePath);  

     file.mkdirs();  

     for (int i = 0; i < files.length; i++) {  

     String[] files2 = this.getAssets().list(path+"/"+files[i]);  

     if (files2.length == 0) {  

     copyFile(path + "/" + files[i]);  

     } else {  

     copyDir(path + "/" + files[i]);  

     }  

     }  

      

     }  

      

     } catch (IOException e) {  

     // TODO Auto-generated catch block  

     e.printStackTrace();  

     }  

      

     }  

      

    private void copyFile(String path) {  

     Log.v("file", path);  

     InputStream in = null;  

     FileOutputStream out = null;  

     try {  

      

     String filePath = "mnt/sdcard" + "/" + path;  

      

     File file = new File(filePath);  

      

     if (!file.exists()) {  

     in = this.getAssets().open(path);  

     out = new FileOutputStream(file);  

     int length = -1;  

     byte[] buf = new byte[1024];  

     while ((length = in.read(buf)) != -1) {  

     out.write(buf, 0, length);  

     }  

     out.flush();  

     in.close();  

     out.close();  

     }  

     } catch (IOException e) {  

     e.printStackTrace();  

    } finally {  

     try {  

     if (in != null) {  

     in.close();  

     }  

     if (out != null) {  

     out.close();  

     }  

     } catch (IOException e) {  

     e.printStackTrace();  

     }  

     }  

      

     }