android - 如何从 onActivityResult 获取任何文件路径、名称、扩展名？

Question

我的代码是:

1.

File file = new File(Environment.getExternalStorageDirectory(),"myFolder");

            Log.d("path", file.toString());

        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.setDataAndType(Uri.fromFile(file), "*/*");
        startActivityForResult(intent,0);

2.

 @Override
    protected void onActivityResult(int requestCode, 
    int resultCode, Intent FileReturnedIntent) {
            // TODO Auto-generated method stub
            super.onActivityResult(requestCode, resultCode, FileReturnedIntent);

如何获取文件路径、名称、扩展名？ (假设文件是​​doc,pdf,csv格式)

Answer 1

它返回文件扩展名，如 pdf、doc .. 等

 public static String getMimeType(Context context, Uri uri) {
    String extension;

    if (uri.getScheme().equals(ContentResolver.SCHEME_CONTENT)) {
         final MimeTypeMap mime = MimeTypeMap.getSingleton();
        extension = mime.getExtensionFromMimeType(context.getContentResolver().getType(uri));
    } else {
        extension = MimeTypeMap.getFileExtensionFromUrl(Uri.fromFile(new File(uri.getPath())).toString());

    }

    return extension;
}

它返回您获取文件名的真实路径。一位 friend 用过这种方法，非常有用。

Get filename and path from URI from mediastore

public String getRealPathFromURI(Context context, Uri contentUri) {
  Cursor cursor = null;
  try { 
    String[] proj = { MediaStore.Images.Media.DATA };
    cursor = context.getContentResolver().query(contentUri,  proj, null, null, null);
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
  } finally {
    if (cursor != null) {
      cursor.close();
    }
  }
}

你从这里得到文件名

public String getFileName(Uri uri) {
  String result = null;
  if (uri.getScheme().equals("content")) {
    Cursor cursor = getContentResolver().query(uri, null, null, null, null);
    try {
      if (cursor != null && cursor.moveToFirst()) {
        result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
      }
    } finally {
      cursor.close();
    }
  }
  if (result == null) {
    result = uri.getPath();
    int cut = result.lastIndexOf('/');
    if (cut != -1) {
      result = result.substring(cut + 1);
    }
  }
  return result;
}