在Android Studio中读取创建的data.txt内部存储数据具体应该怎么写代码，有人帮忙看一下吗，我一直都会报错

Question

public class WriteActivity extends AppCompatActivity {

private Button save;
private EditText etwrite;
private TextView show;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_write);
    save = (Button) findViewById(R.id.save);
    etwrite = (EditText) findViewById(R.id.et_write);
    show = (TextView) findViewById(R.id.tv_show);

    save.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //show.setText(write.getText().toString());
            String write = etwrite.getText().toString().trim();

            //public void save(String EditText){//inputText为传入的要保存的数据
            FileOutputStream out = null;
            BufferedWriter writer = null;
            try {
                out = openFileOutput("data", Context.MODE_APPEND);//"data"为文件名，第二个参数为文件操作模式：文件已经存在，就往文件里面追加类容，不从新创建文件。
                writer = new BufferedWriter(new OutputStreamWriter(out));
                writer.write(write);
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (writer != null) {
                        writer.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            // }


            //读取数据

        }
    });
}

}

Answer 1

这个就是java文件IO啊，网上一大把，你这个问题应该是读取的格式不对，如果是读字符串，那你应该用字符流。