作者介绍：友友们好我是乱披风锤，大二学生党一枚
作者主页：乱披风锤的个人博客主页.乱披风锤
我和友友们一样喜欢编辑，天天敲代码，沉迷学习，日渐消瘦。很荣幸能向大家分享我的所学，和大家一起进步。如果文章有错误，欢迎在评论区指正。那么开始今天的学习吧！
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一、开启Databinding

//在build.gradle中添加android {compileSdk 32dataBinding{enabled=true}

二、添加依赖

 implementation("com.squareup.okhttp3:okhttp:4.9.3")implementation 'com.squareup.retrofit2:retrofit:2.9.0'implementation 'com.squareup.retrofit2:converter-gson:2.9.0'implementation 'com.squareup.okhttp3:logging-interceptor:4.9.3'implementation 'com.github.bumptech.glide:glide:4.13.0'annotationProcessor 'com.github.bumptech.glide:compiler:4.13.0'

三、打开网络权限

四、生成databinding布局

光标在布局文件的根布局–>点击Alt + Enter–>点击 “Convert to data binding layout”

<" />="1.0" encoding="utf-8"?><layout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"><data><!--放变量数据--></data><androidx.constraintlayout.widget.ConstraintLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity">

五、创建数据类

package com.hnucm.databinding;import androidx.databinding.BaseObservable;public class Person extends BaseObservable {public int age;public String name;public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;notifyChange();}}

六、在data变量中声明变量及类全名

<data><variablename="itemlist"type="com.hnucm.databinding.ChatItem.ChatlistDTO" /></data>

七、通过@{}使用变量；（默认值无需加引号，且只在预览视图显示）

<TextViewandroid:id="@+id/textView"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginStart="28dp"android:layout_marginTop="13dp"android:text="@{itemlist.name}"app:layout_constraintStart_toEndOf="@+id/imageView"app:layout_constraintTop_toTopOf="parent" /><TextViewandroid:id="@+id/textView2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginStart="7dp"android:layout_marginTop="20dp"android:text="@{itemlist.content}"app:layout_constraintStart_toStartOf="@+id/textView"app:layout_constraintTop_toBottomOf="@+id/textView" />

八、databinding在recycleview中使用

 ActivityMainBinding activityMainBinding;public List<ChatItem.ChatlistDTO> chatlist = new ArrayList<>();MyAdapter myAdapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);activityMainBinding = DataBindingUtil.setContentView(this,R.layout.activity_main);Api api = RetrofitUtils.getRetrofit("http://121.4.44.56/").create(Api.class);Call<ChatItem> chatItemCall = api.getChatList();chatItemCall.enqueue(new Callback<ChatItem>() {@Overridepublic void onResponse(Call<ChatItem> call, Response<ChatItem> response) {ChatItem chatItem = response.body();chatlist.addAll(chatItem.chatlist);myAdapter.notifyDataSetChanged();}@Overridepublic void onFailure(Call<ChatItem> call, Throwable t) {}});myAdapter = new MyAdapter();activityMainBinding.recyclerView.setAdapter(myAdapter);activityMainBinding.recyclerView.setLayoutManager(new LinearLayoutManager(this));}public class MyAdapter extends RecyclerView.Adapter<MyViewHodler>{@NonNull@Overridepublic MyViewHodler onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {ChatItemBinding chatItemBinding = DataBindingUtil.inflate(LayoutInflater.from(MainActivity.this),R.layout.chat_item,parent,false);MyViewHodler myViewHodler = new MyViewHodler(chatItemBinding.getRoot());myViewHodler.chatItemBinding = chatItemBinding;return myViewHodler;}@Overridepublic void onBindViewHolder(@NonNull MyViewHodler holder, int position) {holder.chatItemBinding.setItemlist(chatlist.get(position));}@Overridepublic int getItemCount() {return chatlist.size();}}public class MyViewHodler extends RecyclerView.ViewHolder{ publicChatItemBinding chatItemBinding;public MyViewHodler(@NonNull View itemView) {super(itemView);}}}

总结

好了，那么今天的学习就到这里了。友友们觉得不错的可以给个关注，点赞或者收藏哦！感谢各位友友们的支持。以下的代码希望各位大佬们自行检验哦，毕竟亲手操作让记忆更加深刻。