在Android中将多个edittext字段中的数据保存到csv文件中

import android.os.Environment;
import android.widget.EditText;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {
    private EditText editText1, editText2, editText3; // 假设有三个EditText组件

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

        // 获取EditText组件的引用
        editText1 = findViewById(R.id.editText1);
        editText2 = findViewById(R.id.editText2);
        editText3 = findViewById(R.id.editText3);
    }

    private void saveDataToCSV() {
        // 获取EditText的文本内容
        String data1 = editText1.getText().toString();
        String data2 = editText2.getText().toString();
        String data3 = editText3.getText().toString();

        // 创建StringBuilder对象
        StringBuilder csvData = new StringBuilder();

        // 添加字段到StringBuilder对象中
        csvData.append(data1).append(",").append(data2).append(",").append(data3).append("\n");

        // 保存CSV文件
        try {
            File csvFile = new File(Environment.getExternalStorageDirectory(), "data.csv");
            FileWriter writer = new FileWriter(csvFile, true);
            writer.append(csvData.toString());
            writer.flush();
            writer.close();
            Toast.makeText(this, "数据保存成功", Toast.LENGTH_SHORT).show();
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(this, "数据保存失败", Toast.LENGTH_SHORT).show();
        }
    }
}

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

private static final int REQUEST_CODE_PERMISSION = 100;

private void requestStoragePermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
            != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                REQUEST_CODE_PERMISSION);
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                       @NonNull int[] grantResults) {
    if (requestCode == REQUEST_CODE_PERMISSION) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            // 权限已授予，执行保存数据的操作
            saveDataToCSV();
        } else {
            Toast.makeText(this, "未授予存储权限，无法保存数据", Toast.LENGTH_SHORT).show();
        }
    }
}