参考： http://stackoverflow.com/questions/7856959/android-file-chooser EDIT's answer.
版权所有，转载注明。

private static final int FILE_SELECT_CODE = 0;

private void showFileChooser() {
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT); 
    intent.setType("*/*"); 
    intent.addCategory(Intent.CATEGORY_OPENABLE);

    try {
        startActivityForResult(
                Intent.createChooser(intent, "Select a File to Upload"),
                FILE_SELECT_CODE);
    } catch (android.content.ActivityNotFoundException ex) {
        // Potentially direct the user to the Market with a Dialog
        Toast.makeText(this, "Please install a File Manager.", 
                Toast.LENGTH_SHORT).show();
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
        case FILE_SELECT_CODE:
        if (resultCode == RESULT_OK) {
            // Get the Uri of the selected file 
            Uri uri = data.getData();
            Log.d(TAG, "File Uri: " + uri.toString());
            // Get the path
            String path = FileUtils.getPath(this, uri);//这里可能需要加个异常捕捉处理
            Log.d(TAG, "File Path: " + path);
            // Get the file instance
            // File file = new File(path);
            // Initiate the upload
        }
        break;
    }
    super.onActivityResult(requestCode, resultCode, data);
}

public static String getPath(Context context, Uri uri) throws URISyntaxException {
    if ("content".equalsIgnoreCase(uri.getScheme())) {
        String[] projection = { "_data" };
        Cursor cursor = null;

        try {
            cursor = context.getContentResolver().query(uri, projection, null, null, null);
            int column_index = cursor.getColumnIndexOrThrow("_data");
            if (cursor.moveToFirst()) {
                return cursor.getString(column_index);
            }
        } catch (Exception e) {
            // Eat it
        }
    }
    else if ("file".equalsIgnoreCase(uri.getScheme())) {
        return uri.getPath();
    }

    return null;
} 

文件浏览器效果.png

如果你能墙，下面的链接可以看看：

code.google.com/p/android-file-chooser

原文如下：

android-file-chooser

Android file chooser
A simple file chooser to android applications.
Possible add filters extensions, ex:

ArrayList<String> extensions = new ArrayList<String>(); 
extensions.add(".pdf"); 
extensions.add(".xls"); 
extensions.add(".xlsx"); 
intent.putStringArrayListExtra("filterFileExtension", extensions); 
startActivityForResult(intent, FILE_CHOOSER);```

> Returns 
```@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
  if ((requestCode == FILE_CHOOSER) && (resultCode == -1)) { 
    String fileSelected = data.getStringExtra("fileSelected"); 
    Toast.makeText(this, fileSelected, Toast.LENGTH_SHORT).show(); 
  }
}```

![https://lh3.googleusercontent.com/-6RoRJPyHxTM/TtmTO4L2RfI/AAAAAAAAA70/EBzuRjv9Nf4/s720/fileChooser.png](https://lh3.googleusercontent.com/-6RoRJPyHxTM/TtmTO4L2RfI/AAAAAAAAA70/EBzuRjv9Nf4/s720/fileChooser.png)