sharedPreferences 读取存储零散的数据

public class MainActivity extends Activity {

    private EditText et_name;

    private EditText et_pass;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        et_name = (EditText) findViewById(R.id.et_name);

        et_pass = (EditText) findViewById(R.id.et_pass);

        readAccount();

    }

    public void readAccount(){

        SharedPreferences sp = getSharedPreferences("info", MODE_PRIVATE);

        String name = sp.getString("name", "");

        String pass = sp.getString("pass", "");

        et_name.setText(name);

        et_pass.setText(pass);

    }

    public void login(View v){

        String name = et_name.getText().toString();

        String pass = et_pass.getText().toString();

        CheckBox cb = (CheckBox) findViewById(R.id.cb);

        //判断选框是否被勾选

        if(cb.isChecked()){

            //使用sharedPreference来保存用户名和密码

            //路径在data/data/com.itheima.sharedpreference/share_

            SharedPreferences sp = getSharedPreferences("info", MODE_PRIVATE);

            //拿到sp的编辑器

            Editor ed = sp.edit();

            ed.putString("name", name);

            ed.putString("pass", pass);

            //提交

            ed.commit();

        }

        //创建并显示吐司对话框

        Toast.makeText(this, "登录成功", 0).show();

    }

}