在Android 11中，应用程序需要处理与存储访问框架（SAF）相关的更改。在访问不在应用专用存储空间中的文件时，应使用SAF而不是直接使用文件路径进行访问。

以下代码示例演示如何通过使用SAF从文件选择器打开docx文件：

private static final int REQUEST_CODE_OPEN_DOCUMENT = 2;

public void openWordDocument() {
    Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    intent.setType("*/*"); // set MIME type to filter files
    intent.putExtra(Intent.EXTRA_TITLE, "Open Word File");
    startActivityForResult(intent, REQUEST_CODE_OPEN_DOCUMENT);
}

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

    if (requestCode == REQUEST_CODE_OPEN_DOCUMENT && resultCode == Activity.RESULT_OK) {
        Uri uri = resultData.getData();
        String path = getFilePathFromURI(getActivity(), uri);
        openDocxFileWithIntent(path);
    }
}

private String getFilePathFromURI(Context context, Uri uri) {
    String filePath = "";
    if (uri.getScheme().equals("file")) {
        filePath = uri.getPath();
    } else {
        try {
            ParcelFileDescriptor pfd = context.getContentResolver().openFileDescriptor(uri, "r");
            if (pfd != null) {
                FileDescriptor fd = pfd.getFileDescriptor();
                filePath = context.getCacheDir().getAbsolutePath() + "/" + uri.getLastPathSegment();
                FileOutputStream fos = new FileOutputStream(filePath);
                FileInputStream fis = new FileInputStream(fd);
                byte[] buffer = new byte[1024];
                int len;
                while ((len = fis.read(buffer)) != -1) {
                    fos.write(buffer, 0, len);
                }
                fis.close();
                fos.close();
                pfd.close();
                fd.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return filePath;
}

private void openDocxFileWithIntent(String filePath) {
    if (!filePath.isEmpty()) {
        File file = new File(filePath);
        Intent intent =