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This article focuses on "how to implement the RecyclerView list in Android MVVM architecture". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how the Android MVVM architecture implements the RecyclerView list.

Effect picture

Import reference Import Recyclerview depends on implementation 'androidx.recyclerview:recyclerview:1.1.0' Import dataBinding reference dataBinding {enabled = true} Code parsing to establish entity classes

Inherit the observed mode BaseObservable

@ Bindable bind field

Refresh data notifyPropertyChanged (BR.mName); / / BR is automatically generated

Public class Information extends BaseObservable {public String mName; public String mSex; public String mAge; public List 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 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 informationList) {this.informationList = informationList; notifyPropertyChanged (BR.informationList);}}

Bind the view layer to the data layer

@ {information.mName}

Create RecyclerView subkey

Import entity classes

Adapter set up adapter

Introduction of data sources

Public MyRecyclerView (List informationList) {this.informationList = informationList;}

Insert layout file

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

Set up data

@ 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 ();}

Customize the ViewHolder class

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 } set child click event

Define Interfac

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

Inherit View.OnClickListener click event

Class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener

Get an interface instance

Public ViewHolder (@ NonNull ViewDataBinding binding,OnItemClickListener listener)

Call interface

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

Open interface

Public void setOnItemClickListener (OnItemClickListener listener) {this.mOnItemClickListener = listener;} adapter all code public class MyRecyclerView extends RecyclerView.Adapter {private List informationList; private OnItemClickListener mOnItemClickListener; public MyRecyclerView (List 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.RecyclerViewpoint tempter); 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 (vMagne getPosition ()) The use of sub-item click events in establishing VM layers

Implement the OnItemClickListener interface

@ Override public void InitListener () {adapter.setOnItemClickListener (new MyRecyclerView.OnItemClickListener () {@ Override public void onItemClick (View view, int position) {Toast.makeText (context, "digits:" + position,Toast.LENGTH_SHORT). Show ();}} VM layer code public class ViewModel implements IViewModel {public Information information; public List 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; iTunes +) {mList.add (new Information ("Zhang San" + I, "male", 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, "digits:" + position,Toast.LENGTH_SHORT) .show ();}});}} data interacts with the view 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));}} so far, I believe you have a better understanding of "how the Android MVVM architecture implements the RecyclerView list". You might as well do it! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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