Android MVVM架构实现RecyclerView列表详解流程

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我是靠谱客的博主清秀仙人掌，最近开发中收集的这篇文章主要介绍Android MVVM架构实现RecyclerView列表详解流程，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

效果图

导入引用

导入Recyclerview依赖

 implementation 'androidx.recyclerview:recyclerview:1.1.0'

导入dataBinding引用

 dataBinding {
            enabled = true
        }

代码解析

建立实体类

继承被观察者模式BaseObservable

@Bindable绑定字段

刷新数据 notifyPropertyChanged( BR.mName );//BR自动生成

public class Information extends BaseObservable {
    public String mName;
    public String mSex;
    public String mAge;
    public List<Information> informationList;
    public Information(){

    }
    public Information(String mName,String mSex,String mAge){
        this.mName = mName;
        this.mSex = mSex;
        this.mAge = mAge;
    }
    @Bindable
    public String getmAge() {
        return mAge;
    }
    @Bindable
    public String getmName() {
        return mName;

    }
    @Bindable
    public String getmSex() {
        return mSex;
    }
    /**
     * @param mName*/
    public void setmName(String mName) {
        this.mName = mName;
        notifyPropertyChanged( BR.mName );
    }
    @Bindable
    public List<Information> getInformationList() {
        return informationList;
    }

    /**
     * @param mSex */
    public void setmSex(String mSex) {
        this.mSex = mSex;
        notifyPropertyChanged( BR.mSex );
    }
   /**
    * @param mAge */
    public void setmAge(String mAge) {
        this.mAge = mAge;
        notifyPropertyChanged( BR.mAge );
    }
    /**
     * @param informationList */
    public void setInformationList(List<Information> informationList) {
        this.informationList = informationList;
        notifyPropertyChanged( BR.informationList );
    }
}

将视图层与数据层绑定

@{information.mName}

建立RecyclerView子项

导入实体类

 <data>
        <variable
            name="information"
            type="com.franzliszt.mvvmrecyclerview.model.Information" />
    </data>

<layout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <data>
        <variable
            name="information"
            type="com.franzliszt.mvvmrecyclerview.model.Information" />
    </data>
<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="30dp"
    android:layout_marginRight="30dp"
    android:background="#F5F5F5">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal"
        android:layout_marginTop="20dp"
        android:background="@drawable/item_bg_style"
        android:gravity="center"
        android:paddingLeft="20dp">
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:hint="名字"
            android:text="@{information.mName}"/>
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:hint="性别"
            android:text="@{information.mSex}"/>
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:hint="年龄"
            android:text="@{information.mAge}"/>
    </LinearLayout>

</LinearLayout>
</layout>

适配器

建立适配器

引入数据源

public MyRecyclerView(List<Information> informationList){
        this.informationList = informationList;
    }

插入布局文件

 @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        ViewDataBinding binding = DataBindingUtil.inflate( LayoutInflater.from( parent.getContext()) , R.layout.recyclerview_item,parent,false);
        return new ViewHolder( binding,mOnItemClickListener );
    }

设置数据

 @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Information information = informationList.get( position );
        holder.binding.setVariable( BR.information,informationList.get( position ));
        holder.binding.executePendingBindings();
    }

自定义ViewHolder类

class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
        ViewDataBinding binding = null;
        OnItemClickListener listener;
        public ViewHolder(@NonNull ViewDataBinding binding,OnItemClickListener listener) {
            super( binding.getRoot() );
            this.listener = listener;
            this.binding = binding;
            binding.getRoot().setOnClickListener( this );
        }
        public ViewDataBinding getBinding(){
            return binding;
        }

设置子项点击事件

定义接口

public interface OnItemClickListener {
        void onItemClick(View view, int position);
    }

继承View.OnClickListener点击事件

class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener

获取接口实例

public ViewHolder(@NonNull ViewDataBinding binding,OnItemClickListener listener)

调用接口

 @Override
        public void onClick(View v) {
            if (listener != null){
                listener.onItemClick( v,getPosition() );
            }
        }

开放接口

public void setOnItemClickListener(OnItemClickListener listener) {
        this.mOnItemClickListener = listener;
    }

adapter全部代码

public class MyRecyclerView extends RecyclerView.Adapter<MyRecyclerView.ViewHolder>{
    private List<Information> informationList;
    private OnItemClickListener mOnItemClickListener;
    public MyRecyclerView(List<Information> informationList){
        this.informationList = informationList;
    }

    public interface OnItemClickListener {
        void onItemClick(View view, int position);
    }

    public void setOnItemClickListener(OnItemClickListener listener) {
        this.mOnItemClickListener = listener;
    }
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        ViewDataBinding binding = DataBindingUtil.inflate( LayoutInflater.from( parent.getContext()) , R.layout.recyclerview_item,parent,false);
        return new ViewHolder( binding,mOnItemClickListener );
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Information information = informationList.get( position );
        holder.binding.setVariable( BR.information,informationList.get( position ));
        holder.binding.executePendingBindings();
    }

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


    class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
        ViewDataBinding binding = null;
        OnItemClickListener listener;
        public ViewHolder(@NonNull ViewDataBinding binding,OnItemClickListener listener) {
            super( binding.getRoot() );
            this.listener = listener;
            this.binding = binding;
            binding.getRoot().setOnClickListener( this );
        }
        public ViewDataBinding getBinding(){
            return binding;
        }

        @Override
        public void onClick(View v) {
            if (listener != null){
                listener.onItemClick( v,getPosition() );
            }
        }
    }
}

建立VM层

子项点击事件的使用

实现OnItemClickListener接口

@Override
    public void InitListener(){
        adapter.setOnItemClickListener( new MyRecyclerView.OnItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {
                Toast.makeText( context,"位数："+position,Toast.LENGTH_SHORT ).show();
            }
        } );
    }

VM层代码

public class ViewModel implements IViewModel{
    public Information information;
    public List<Information> mList = new ArrayList<>(  );
    private RecyclerView recyclerView;
    private Context context;
    private MyRecyclerView adapter;
    public ViewModel(Information information, RecyclerView recyclerView, Context context){
        this.information = information;
        this.recyclerView = recyclerView;
        this.context = context;
        InitRecyclerView();
        InitData();
        InitListener();
    }
    private void InitRecyclerView(){
        recyclerView.setLayoutManager( new LinearLayoutManager( context ) );
        adapter = new MyRecyclerView( mList );
        recyclerView.setAdapter( adapter );
    }
    @Override
    public void InitData() {
        for (int i = 0; i < 10; i++) {
            mList.add( new Information( "张三"+i,"男",i+"" ) );
            Log.d( "TAG",mList.get( i ).mName+"" );
        }
        information.setInformationList( mList );
    }
    @Override
    public void InitListener(){
        adapter.setOnItemClickListener( new MyRecyclerView.OnItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {
                Toast.makeText( context,"位数："+position,Toast.LENGTH_SHORT ).show();
            }
        } );
    }
}

数据与视图交互

public class MainActivity extends AppCompatActivity {
    private ActivityMainBinding binding;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );
        binding = DataBindingUtil.setContentView( this,R.layout.activity_main );
        binding.setViewmodel( new ViewModel(new Information(  ),binding.myRecyclerView,MainActivity.this) );
    }
}

到此这篇关于Android MVVM架构实现RecyclerView列表详解流程的文章就介绍到这了,更多相关Android RecyclerView列表内容请搜索靠谱客以前的文章或继续浏览下面的相关文章希望大家以后多多支持靠谱客！

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本文分类：Android
浏览次数：165 次浏览
发布日期：2022-05-30 15:50:12
本文链接：https://www.kaopuke.com/article/k-p-k_14_ujo_22_fy_14__7_k0.html

Android MVVM架构实现RecyclerView列表详解流程

概述

目录

效果图

导入引用

导入Recyclerview依赖

导入dataBinding引用

代码解析

建立实体类

建立RecyclerView子项

适配器

建立适配器

设置子项点击事件

adapter全部代码

建立VM层

子项点击事件的使用

VM层代码

数据与视图交互

最后

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Android MVVM架构实现RecyclerView列表详解流程

概述

目录

效果图

导入引用

导入Recyclerview依赖

导入dataBinding引用

代码解析

建立实体类

建立RecyclerView子项

适配器

建立适配器

设置子项点击事件

adapter全部代码

建立VM层

子项点击事件的使用

VM层代码

数据与视图交互

最后

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