Android - 如何从文档中获取选定的文件名

Question

我正在使用以下代码启动选择文档网的 Intent 。

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"), 1);
    } 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();
    }
}

在我试图获取文件路径时，在 onActivity 结果中，它会给出一些其他数字来代替文件名。

    @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
    case 1:
        if (resultCode == RESULT_OK) {
            // Get the Uri of the selected file
            Uri uri = data.getData();
            File myFile = new File(uri.toString());
            String path = myFile.getAbsolutePath();
        }
        break;
    }
    super.onActivityResult(requestCode, resultCode, data);
}

我得到这样的路径值。“内容://com.android.providers.downloads.documents/document/1433”但我想要真正的文件名，如 doc1.pdf 等。如何获得它？

Answer 1

当您获得 content://uri 时，您需要查询内容解析器，然后获取显示名称。

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
    case 1:
        if (resultCode == RESULT_OK) {
            // Get the Uri of the selected file
            Uri uri = data.getData();
            String uriString = uri.toString();
            File myFile = new File(uriString);
            String path = myFile.getAbsolutePath();
            String displayName = null;

            if (uriString.startsWith("content://")) {                   
                Cursor cursor = null;
                try {                           
                    cursor = getActivity().getContentResolver().query(uri, null, null, null, null);                         
                    if (cursor != null && cursor.moveToFirst()) {                               
                        displayName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
                    }
                } finally {
                    cursor.close();
                }
            } else if (uriString.startsWith("file://")) {           
                displayName = myFile.getName();
            }
        }
        break;
    }
    super.onActivityResult(requestCode, resultCode, data);
}