在绑定数据源时，需自定义ArrayAdapter，并覆盖getView()方法。在getView()方法中，设置AutoCompleteTextView的文本为选定项目的正确文本。

示例代码如下：

CustomArrayAdapter.java：

public class CustomArrayAdapter extends ArrayAdapter {
    private Context mContext;
    private List mMyDataList;

    public CustomArrayAdapter(Context context, List myDataList) {
        super(context, 0, myDataList);
        mContext = context;
        mMyDataList = myDataList;
    }

    @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);
            }

            TextView textView = (TextView) convertView.findViewById(R.id.tv_text);
            MyData myData = mMyDataList.get(position);
            textView.setText(myData.getCorrectText());

            return convertView;
        }
    }

在Activity中设置AutoCompleteTextView的Adapter：

List myDataList = getMyDataList(); // 获取数据源
CustomArrayAdapter adapter = new CustomArrayAdapter(this, myDataList);
autoCompleteTextView.setAdapter(adapter);
autoCompleteTextView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView parent, View view, int position, long id) {
        MyData selectedData = (MyData) parent.getItemAtPosition(position);
        String correctText = selectedData.getCorrectText();
        autoCompleteTextView.setText(correctText); // 设置正确文本到AutoCompleteTextView
    }
});