如何在安卓应用中将ArrayList写入文本文件

import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    private ArrayList<String> dataList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 初始化ArrayList并添加数据
        dataList = new ArrayList<>();
        dataList.add("Data 1");
        dataList.add("Data 2");
        dataList.add("Data 3");

        // 将ArrayList写入文本文件
        writeArrayListToFile(dataList, "data.txt");
    }

    private void writeArrayListToFile(ArrayList<String> arrayList, String fileName) {
        try {
            FileOutputStream fos = openFileOutput(fileName, Context.MODE_PRIVATE);
            OutputStreamWriter osw = new OutputStreamWriter(fos);
            BufferedWriter writer = new BufferedWriter(osw);

            for (String data : arrayList) {
                writer.write(data);
                writer.newLine(); // 换行
            }

            writer.close();
            osw.close();
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}