Android RecyclerView implements click entry deletion

This article example for everyone to share RecyclerView to achieve click item deletion specific code, for your reference, the specific content is as follows

MainActivity.java

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

  private Button mButton1;
  private Button mButton2;
  private Button mButton3;
  private Button mButton4;
  private Button mButton5;
  private RecyclerView mRecyclerView;
  private ArrayList<String> mList;
  private LinearLayoutManager mLinearLayoutManager;
  private RvAdapter mAdapter;


  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    findViews();

    mList = new ArrayList<>();
    for (int i=0;i<20;i++){
      mList.add(i+"item");
    }

    mAdapter = new RvAdapter(mList, this);
    mRecyclerView.setAdapter(mAdapter);

    // Set the dividing line 
    mRecyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
    // Set the default layout 
    mLinearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
    mRecyclerView.setLayoutManager(mLinearLayoutManager);

    mAdapter.setOnItemClickListener(new RvAdapter.OnItemClickListener() {
      @Override
      public void onItemClick(int position) {
        mAdapter.remove(position);
      }

      @Override
      public void onItemLongClick(int position) {

        mAdapter.remove(position);
      }
    });

  }

  private void findViews() {

    mRecyclerView = findViewById(R.id.rv);

    mButton1= findViewById(R.id.b1);
    mButton2= findViewById(R.id.b2);
    mButton3= findViewById(R.id.b3);
    mButton4= findViewById(R.id.b4);
    mButton5= findViewById(R.id.b5);

    mButton1.setOnClickListener(this);
    mButton2.setOnClickListener(this);
    mButton3.setOnClickListener(this);
    mButton4.setOnClickListener(this);
    mButton5.setOnClickListener(this);


  }

  @Override
  public void onClick(View view) {
    switch (view.getId()){
      case R.id.b1:

        mAdapter.addData(3);
        mRecyclerView.scrollToPosition(0);
        break;
      case R.id.b2:

        mAdapter.remove(mList.size()-1);
        break;
      case R.id.b3:

        mLinearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        mRecyclerView.setLayoutManager(mLinearLayoutManager);
        break;
      case R.id.b4:

        mRecyclerView.setLayoutManager(new GridLayoutManager(this, 3));
        //mRecyclerView.addItemDecoration(new android.support.v7.widget.DividerItemDecoration(this, DividerItemDecoration.HORIZONTAL));

        break;
      case R.id.b5:

        mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
        break;
    }
  }
}

activity_main.xml

<android.support.constraint.ConstraintLayout 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"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".MainActivity">

  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="horizontal">
      <Button
        android:id="@+id/b1"
        android:layout_width="wrap_content"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:text=" Add "/>
      <Button
        android:id="@+id/b2"
        android:layout_width="wrap_content"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:text=" Delete "/>
      <Button
        android:id="@+id/b3"
        android:layout_width="wrap_content"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:text="List"/>
      <Button
        android:id="@+id/b4"
        android:layout_width="wrap_content"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:text="Grid"/>
      <Button
        android:id="@+id/b5"
        android:layout_width="wrap_content"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:text="flow"/>
    </LinearLayout>
    <android.support.v7.widget.RecyclerView
      android:id="@+id/rv"
      android:layout_width="match_parent"
      android:layout_height="match_parent"/>
  </LinearLayout>

</android.support.constraint.ConstraintLayout>

RvAdapter.java

public class RvAdapter extends RecyclerView.Adapter<RvAdapter.ViewHolder>{

  private List<String> lists;
  private Context mContext;

  public RvAdapter(List<String> lists, Context context) {
    this.lists = lists;
    mContext = context;
  }

  @Override
  public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = View.inflate(mContext, R.layout.item, null);
    ViewHolder holder = new ViewHolder(view);
    return holder;
  }

  public void addData(int position) {
    lists.add(position,"ff");
    notifyItemInserted(position);
  }

  public void remove(int i) {
    lists.remove(i);
    notifyItemRemoved(i);
    notifyDataSetChanged();

  }

  public interface OnItemClickListener{  // Custom interface callback setting click event 
    void onItemClick(int position);
    void onItemLongClick(int position);
  }

  private OnItemClickListener mOnItemClickListener;

  public void setOnItemClickListener(OnItemClickListener onItemClickListener){
    mOnItemClickListener=onItemClickListener;
  }

  @Override
  public void onBindViewHolder(final ViewHolder holder, final int position) {
    holder.mTextView.setText(lists.get(position));

       holder.itemView.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View view) {

           int ps = holder.getLayoutPosition();
           mOnItemClickListener.onItemClick(ps);
         }
       });

       holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
         @Override
         public boolean onLongClick(View view) {

           int ps=holder.getLayoutPosition();
           mOnItemClickListener.onItemLongClick(ps);
           return false;
         }
       });

  }


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

  public static class ViewHolder extends RecyclerView.ViewHolder{
    public final TextView mTextView;

    public ViewHolder(View itemView) {
      super(itemView);
      mTextView = (TextView) itemView.findViewById(R.id.tv);
    }
  }
}

build.gradle

implementation 'com.android.support:recyclerview-v7:27.1.1'