如何在android中选择文件夹？

Question

嗨有一种方法来选择用户想要在android中保存文件的文件夹。我检查了http://code.google.com/p/android-file-dialog/

它具有以下功能：选择文件，但我要选择的文件夹，请给我提供有用的链接或例子。

Answer 1

我用同样的源在我的应用程序（很肯定），并有一个代码块：

protected void onListItemClick(ListView l, View v, int position, long id) { 
    if (file.isDirectory()) { 
     selectButton.setEnabled(false); 
     if (file.canRead()) { 
      lastPositions.put(currentPath, position); 
      getDir(path.get(position)); 
     } else { 
      new AlertDialog.Builder(this) 
        .setIcon(R.drawable.icon) 
        .setTitle(
          "[" + file.getName() + "] " 
            + getText(R.string.cant_read_folder)) 
        .setPositiveButton("OK", 
          new DialogInterface.OnClickListener() { 

           @Override 
           public void onClick(DialogInterface dialog, 
             int which) { 

           } 
          }).show(); 
     } 
    } else { 
     selectedFile = file; 
     v.setSelected(true); 
     selectButton.setEnabled(true); 
    } 
} 

你只需要编辑它如何处理的if (file.isDirectory())。我建议在您的活动中声明一个boolean值，如果该文件是一个目录并且它已经是false，则更改为true。然后如果所述值为真，则遍历该目录。此外，当您将所述值更改为true时，您需要致电selectButton.setEnabled(true)。这会比制作自己的代码复杂得多，我会说。

Answer 2

如何使用OI File Manager？这个应用程序有以下意图：PICK_FILE，PICK_DIRECTORY。 在页面上甚至有使用Intents的示例代码。

Answer 3

看看这个答案https://stackoverflow.com/a/28479561/779140 我被提到图书馆的作者，所以不要犹豫，问任何问题。

Answer 4

我遇到了同样的问题，我最终使用NoNonsense-FilePicker

添加到摇篮文件

编译 'com.nononsenseapps：filepicker：4.0.0'

触发文件/文件夹/目录选

try { 

        Utils.makeHepticFeedback(getActivity()); 

        Intent selectDirectoyIntent = new Intent(getActivity(), FilePickerActivity.class); 
        selectDirectoyIntent.putExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, false); 
        selectDirectoyIntent.putExtra(FilePickerActivity.EXTRA_ALLOW_CREATE_DIR, true); 
        selectDirectoyIntent.putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_DIR); 
        selectDirectoyIntent.putExtra(FilePickerActivity.EXTRA_START_PATH, Environment.getExternalStorageDirectory().getPath()); 
        startActivityForResult(selectDirectoyIntent, FILE_CODE); 

       } catch (Exception e) { 
        Log.e(LOG_TAG, "exception", e); 
        e.printStackTrace(); 

        Toast.makeText(getActivity(), e.toString(), Toast.LENGTH_SHORT).show(); 
       } 

Handle Act ivity结果得到选定的文件或文件

@Override 
     public void onActivityResult(int requestCode, int resultCode, Intent data) { 
      super.onActivityResult(requestCode, resultCode, data); 

      if (resultCode == Activity.RESULT_OK && requestCode == CHOOSE_IMAGE_REQUEST_CODE) { 
       Uri selectedImageUri = data.getData(); 
       String selectedImagePath = getRealPathFromURI(selectedImageUri); 


       // NOW WE HAVE OUR WANTED STRING 
       if (selectedImagePath != null) { 
        System.out 
          .println("selectedImagePath is the right one for you!"); 

        PreferenceHelper.getPreferenceHelperInstance().setString(getActivity(), 
          PreferenceHelper.PLAYER_BACKGROUND, 
          selectedImageUri.toString()); 

        Glide.with(getActivity()).load(Uri.parse(
          PreferenceHelper.getPreferenceHelperInstance().getString(getActivity(), 
            PreferenceHelper.PLAYER_BACKGROUND 
            , AppConstants.DEFAULT_BACKGROUND_URL))). 
          into((ImageView) ButterKnife.findById(getActivity(), R.id.play_back)); 

       } 
      } else if (requestCode == FILE_CODE && resultCode == Activity.RESULT_OK) { 

       if (null != data && !data.getBooleanExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, false)) { 
        // The URI will now be something like content://PACKAGE-NAME/root/path/to/file 
        Uri uri = data.getData(); 
        // A utility method is provided to transform the URI to a File object 
        File file = com.nononsenseapps.filepicker.Utils.getFileForUri(uri); 
        // If you want a URI which matches the old return value, you can do 
        Uri fileUri = Uri.fromFile(file); 
        // Do something with the result... 

        Snackbar.make(fileFormat, "Recording folder updated to" + fileUri.getPath() + " ¯\\_(ツ)_/¯ ", Snackbar.LENGTH_SHORT).show(); 

        AppConfig.RECORDING_FOLDER = fileUri.getPath(); 

        PreferenceHelper.getPreferenceHelperInstance().setString(getActivity(), PreferenceHelper.RECORDING_FOLDER, AppConfig.RECORDING_FOLDER); 

        setUpSettingValue(); 

       } else { 

        // Handling multiple results is one extra step 
        ArrayList<String> paths = data.getStringArrayListExtra(FilePickerActivity.EXTRA_PATHS); 
        if (paths != null) { 
         for (String path : paths) { 
          Uri uri = Uri.parse(path); 
          // Do something with the URI 
          File file = com.nononsenseapps.filepicker.Utils.getFileForUri(uri); 
          // If you want a URI which matches the old return value, you can do 
          Uri fileUri = Uri.fromFile(file); 
          // Do something with the result... 

          Toast.makeText(getActivity(), "Selected dir" + fileUri.getPath(), Toast.LENGTH_SHORT).show(); 


         } 
        } 
       } 
      } 

     }