在android中点击按钮时打开多个文件中的文本文件

<Button
    android:id="@+id/openButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="打开文件" />

Button openButton = findViewById(R.id.openButton);
openButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
        intent.setType("text/plain");
        intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
        startActivityForResult(intent, REQUEST_CODE);
    }
});

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
        if (data != null) {
            ClipData clipData = data.getClipData();
            if (clipData != null) {
                int count = clipData.getItemCount();
                for (int i = 0; i < count; i++) {
                    Uri uri = clipData.getItemAt(i).getUri();
                    // 在这里可以对选中的文本文件进行处理
                    // 例如，可以使用ContentResolver来读取文件内容
                    try {
                        InputStream inputStream = getContentResolver().openInputStream(uri);
                        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
                        String line;
                        StringBuilder stringBuilder = new StringBuilder();
                        while ((line = reader.readLine()) != null) {
                            stringBuilder.append(line);
                        }
                        reader.close();
                        inputStream.close();
                        String fileContent = stringBuilder.toString();
                        // 对文件内容进行处理
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
    }
}