关于Android文件读写的问题

Question

本人小白一枚，最近写了一个文件读写的demo，但在\data\data\包名\ 下生成的文件不是txt格式，却是这么个东东，所以想让各位大神看看问题在哪里

代码：public class MainActivity extends Activity {
private EditText mfilename;
private EditText mfilecontent;
private Button msave;

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

    mfilename = (EditText) findViewById(R.id.filename);
    mfilecontent= (EditText) findViewById(R.id.filecontent);
    msave = (Button) findViewById(R.id.save);
    msave.setOnClickListener(new saveClickListener());
}
private class saveClickListener implements OnClickListener{

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        String filename = mfilename.getContext().toString();
        String filecontent = mfilecontent.getContext().toString();

        FileService service = new FileService(getApplicationContext());
        try {
            service.save(filename,filecontent);
            Toast.makeText(getApplicationContext(), R.string.success, 1).show();

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), R.string.fail, 1).show();
        }
    }

}

}
import android.content.Context;

public class FileService {
private Context context;

public FileService(Context context) {
    super();
    this.context = context;
}

public void save(String filename, String filecontent) throws Exception {
    // TODO Auto-generated method stub
    FileOutputStream output = context.openFileOutput(filename, Context.MODE_PRIVATE);
    output.write(filecontent.getBytes());
    output.close();
}

}

Answer 1

文件写进去的时候，名字要带上.txt啊