java - 如何将 textview 设置为共享首选项值

Question

您好，我想知道如何从 android 调用 session

以下是我的登录页面的代码，其中设置了 session

Runnable runnable = new Runnable() {
        public void run() {
            Users user = mapper.load(Users.class,username);

           // System.out.println(user.getPassword());
           // System.out.println(username);
            try {
                if (user != null && user.getPassword().equals(password)) {
                    //System.out.println("Correct");
                    SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", MODE_PRIVATE);
                    SharedPreferences.Editor editor = pref.edit();
                    editor.putString("userSession", username);
                    editor.commit();

                    runOnUiThread(new Runnable() {

                        @Override
                        public void run() {
                            //setContentView(R.layout.activity_account);
                            startActivity(new Intent(startActivity.this, accountActivity.class));
                        }
                    });

登录后进入账户页面，账户页面代码如下

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_account);
      /* SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", MODE_PRIVATE);
    SharedPreferences.Editor editor = pref.edit();

    String User=pref.getString("userSession", "Not Exist");
    System.out.println("Hello");
    System.out.println(User);
*/
    test = (Button) findViewById(R.id.streamingButton);
    testId = (TextView)findViewById(R.id.welcomeTxt);
}

现在我想知道如何将 TextView 设置为登录用户的用户名我已经注释了共享首选项代码，因为它也不会打印用户 ID。我不明白为什么注释的代码不起作用

Answer 1

您不需要使用 SharedPreferences，只需将数据放入 Intent 中即可。然后你可以从accountActivity的onCreate中获取数据。看这个:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_account);

    Intent intent = getIntent();
    String userName = intent.getStringExtra("userName");

    test = (Button) findViewById(R.id.streamingButton);
    testId = (TextView)findViewById(R.id.welcomeTxt);

}