将ArrayList<String>保存到内部存储器

import android.content.Context;
import android.text.TextUtils;

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

public class StorageUtil {
    public static void saveArrayListToFile(Context context, ArrayList<String> arrayList, String fileName) {
        String data = TextUtils.join(",", arrayList); // 使用逗号作为分隔符连接ArrayList中的字符串

        try {
            File file = new File(context.getFilesDir(), fileName); // 创建文件
            FileOutputStream fos = new FileOutputStream(file);
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(fos));

            writer.write(data); // 将字符串写入文件
            writer.flush();
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}