为什么除了监听器绑定会提示程序包不存在，找不到符号，别的都行呢，语法应该没错，我贴下代码

源自：2-2 Data Binding基础用法

为什么除了监听器绑定会提示程序包不存在，找不到符号，别的都行呢，语法应该没错，我贴下代码

public void  OnClickListenerBinding(User user){
    Toast.makeText(MainActivity.this,user.getLastName(),Toast.LENGTH_SHORT).show();
}

<TextView
    android:onClick="@{() -> presenter.OnClickListenerBinding(user)}"
    android:text="@{User.lastName}"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

只有绑定监听器事件不行，别的都可以的，这是什么原因，语法检查很多遍没错啊

提问者：慕粉4142398 2016-10-30 22:15

个回答

feels_chaotic

2016-11-01 10:39:57

已采纳

所以到底是User还是user呢？建议贴全代码

0

慕粉4142398: 2016-11-01 17:40:04

public class MainActivity extends AppCompatActivity {

    User user = new User("小白","小黑");
    private ActivityMainBinding binding;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
//        binding.firstName.setText(user.getFirstName());
//        binding.lastName.setText(user.getLastName());
        binding.setUser(user);
//        binding.setVariable(BR.User,user);
      binding.setPresenter(new Presenter());



    }

    public class Presenter{
        public void onTextChanged(CharSequence s,int start,int before,int count){
            user.setFirstName(s.toString());
            binding.setUser(user);
        }

        public void onClick(View view){
            Toast.makeText(MainActivity.this,"点到了",Toast.LENGTH_SHORT).show();
        }
          public void  OnClickListenerBinding(User user){
              Toast.makeText(MainActivity.this,user.getLastName(),Toast.LENGTH_SHORT).show();
          }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
   >
    <data>
       <variable
           name="User"
           type="chachewuyou.qs.demo.User"/>
        <variable
            name="presenter"
            type="chachewuyou.qs.demo.MainActivity.Presenter"/>
    </data>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_horizontal"
        android:orientation="vertical">

        <EditText
            android:onTextChanged="@{presenter.onTextChanged}"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="输入First Name" />

        <EditText

            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="输入Last Name" />

        <TextView
            android:onClick="@{presenter.onClick}"
            android:text="@{User.firstName}"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <TextView
            android:onClick="@{() -> presenter.OnClickListenerBinding(user)}"
            android:text="@{User.lastName}"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

    </LinearLayout>
</layout>