📋 作者介绍：友友们好我是乱披风锤，大二学生党一枚
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一、开启Databinding

//在build.gradle中添加
android {
    compileSdk 32
    dataBinding{
        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”

<?xml version="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.ConstraintLayout
        android: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>
        <variable
            name="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）

<TextView
            android: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" />

        <TextView
            android: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;
    @Override
    protected 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>() {
            @Override
            public void onResponse(Call<ChatItem> call, Response<ChatItem> response) {
                ChatItem chatItem = response.body();
                chatlist.addAll(chatItem.chatlist);
                myAdapter.notifyDataSetChanged();
            }

            @Override
            public 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
        @Override
        public 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;
        }

        @Override
        public void onBindViewHolder(@NonNull MyViewHodler holder, int position) {
            holder.chatItemBinding.setItemlist(chatlist.get(position));
        }

        @Override
        public int getItemCount() {
            return chatlist.size();
        }
    }

    public class MyViewHodler extends RecyclerView.ViewHolder{
       public  ChatItemBinding chatItemBinding;
        public MyViewHodler(@NonNull View itemView) {
            super(itemView);
        }
    }

}

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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。