共享首选项首次空时当我重新启动应用程序时没有注销代码工作正常

Question

问题是我存储了Facebook用户名电子邮件ID和个人资料图片并在下一个活动中检索数据但问题是当我重新启动应用程序代码工作正常时我登录数据为空。

存储数据

String email = object.getString("email");

String id = object.getString("id");`
sessionManager.setfacebookid(object.getString("email").toString());


String imageurl = "https://graph.facebook.com/" + id + "/picture?type=large";

sessionManager.setfacebookimage("https://graph.facebook.com/" + id + "/picture?type=large".toString());

检索数据

sessionManager.isUserLogin（）;             navHeader = navigationView.getHeaderView（0）;

        String facebookname = sessionManager.getfacebookname();
        tvvwelcome2 = (TextView) navHeader.findViewById(R.id.tvwelcome2);
        tvvwelcome2.setText(facebookname);
        Log.e("facebooknamein text....", "" + facebookname);

        String facebookid = sessionManager.getfacebookid();

        tvemail2 = (TextView) navHeader.findViewById(R.id.headeremail2);

        tvemail2.setText(facebookid);

        Log.e("emailfbinnavigation", "" + facebookid);

        String facedp = sessionManager.getfacebookdp();

        imgbtn2 = (ImageView) navHeader.findViewById(R.id.profileheader2);

        Picasso.with(this).load(facedp).into(imgbtn2);

        Log.e("imageview in image", "" + facedp);

提前致谢

Answer 1

尝试使用如下所述的SharedPreferences，

保存数据：

SharedPreferences prefs = getSharedPreferences("my_prefs", MODE_PRIVATE);
Editor editor = prefs.edit();
editor.putString("name", "Sahil");
editor.commit();

要检索数据：

SharedPreferences prefs = getSharedPreferences("my_prefs", MODE_PRIVATE);
String name= prefs.getString("name");