Android Studio 把EditText输入的内容存储到本地文件当中

网课指路 B站大神:（学完必会）Android studio基础，从入门到精通，学完小白也能会_哔哩哔哩_bilibili

package com.example.filetest;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.EditText;

import java.io.BufferedWriter;
import java.io.OutputStream;
import java.io.OutputStreamWriter;

public class MainActivity extends AppCompatActivity {
    private EditText editText;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editText = (EditText)findViewById(R.id.editText);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        String s = editText.getText().toString();
        save(s);
    }

    private void save(String s) {
        OutputStream out = null;
        BufferedWriter writer = null;
        try {
            out = openFileOutput("data",MODE_PRIVATE);
            writer = new BufferedWriter(new OutputStreamWriter(out));
            writer.write(s);
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            try {
                if(writer!=null)
                {
                    writer.close();
                }
            }catch (Exception e){
                e.printStackTrace();
            }
           
        }
    }
}

通过Device File Explorer 可以找到生成的data文件