[移动开发]Android studio打开SharedPreferences存储的xml文件

package com.example.batterytest;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.Button;
import android.widget.Toast;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends Activity
{
    private SharedPreferences preferences;
    private SharedPreferences.Editor editor;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 获取只能被本应用程序读写的SharedPreferences对象
        preferences = getSharedPreferences("test111", Context.MODE_PRIVATE);
        editor = preferences.edit();
        Button read = findViewById(R.id.read);
        Button write = findViewById(R.id.write);
        read.setOnClickListener(view -> {
            // 读取字符串数据
            String time = preferences.getString("time", null);
            // 读取int类型的数据
            int randNum = preferences.getInt("random", 0);
            String result = time == null ? "您暂时还未写入数据" : "写入时间为：" +
                    time + "\n上次生成的随机数为：" + randNum;
            // 使用Toast提示信息
            Toast.makeText(MainActivity.this, result, Toast.LENGTH_SHORT).show();
        });
        write.setOnClickListener(view -> {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 " + "hh:mm:ss");
            // 存入当前时间
            editor.putString("time", sdf.format(new Date()));
            // 存入一个随机数
            editor.putInt("random", (int) (Math.random() * 100));
            // 提交所有存入的数据
            editor.apply();
        });
    }
}

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