使用 DataBinding 库绑定事件 [英] Using DataBinding library for binding events

问题描述

我正在尝试使用 Android M 附带的 DataBinding 库 将事件与 xml 中的视图绑定.我正在遵循 Android 开发人员 并逐步实施.对于视图的属性，如可见性，文本其工作正常，但如果我尝试使用 onclick 绑定，则无法按预期工作.这是我迄今为止尝试过的示例代码:

I'm trying to bind events with views in xml using DataBinding Library shipped with Android M. I'm following examples from Android Developers and implementing step-by-step. for the view's attributes like visibility,text its working fine but if I try to bind with onclick, it doesn't work as expected. Here's the sample code that I've tried so far:

 <data>
    <import type="android.view.View"/>
    <variable name="user" type="com.example.databinding.User"/>
    <variable name="handlers" type="com.example.databinding.MyHandlers"/>
</data>

 <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@{user.firstName}"
    android:visibility="@{user.isFriend ? View.VISIBLE : View.GONE}" />
 <Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Click Me"
    android:id="@+id/button"
    android:layout_gravity="left"
    android:onClick="@{handlers.onClickFriend}"/>

主要活动:

  public class MainActivity extends AppCompatActivity {

  User user;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ActivityMainBinding binding = 
    DataBindingUtil.setContentView(this,R.layout.activity_main);
    user = new User("Pankaj","Kumar",true,true);
    binding.setUser(user);
   }
 }

MyHandlers:

MyHandlers:

public class MyHandlers {
public void onClickFriend(View view){
    Log.i(MyHandlers.class.getSimpleName(),"Now Friend");
}

public void onClickEnemy(View view){
    Log.i(MyHandlers.class.getSimpleName(),"Now Enemy");
  }
}

我只编写了必要的代码来提高可读性.有人可以帮我解决这个问题.

I've written only required code to improve readability. Could someone help me on this.

推荐答案

我认为您还需要绑定 handlers，也许在 onCreate 中是这样的:

I think you will need to bind the handlers as well, maybe something like this in onCreate:

MyHandlers handlers = new MyHandlers();
binding.setHandlers(handlers);

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