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Android RecyclerView实现滑动删除

    本文实例为大家分享了RecyclerView实现滑动删除的具体代码,供大家参考,具体内容如下

    
    package com.example.demo;
     
    import androidx.annotation.NonNull;
    import androidx.appcompat.app.AppCompatActivity;
    import androidx.recyclerview.widget.ItemTouchHelper;
    import androidx.recyclerview.widget.LinearLayoutManager;
    import androidx.recyclerview.widget.RecyclerView;
     
    import android.graphics.Canvas;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.LinearLayout;
    import android.widget.TextView;
     
    import java.util.ArrayList;
    import java.util.List;
     
    /**
     * @author Huang xudong
     * @date 2020/7/26
     */
    public class MainActivity extends AppCompatActivity {
     private RecyclerView recyclerView;
     
     private List list=new ArrayList();
     
     class MyAdpter extends RecyclerView.Adapter<MyAdpter.ViewHolder>{
     
      class ViewHolder extends RecyclerView.ViewHolder{
       private TextView textView;
       private LinearLayout linearLayout;
     
       public ViewHolder(@NonNull View itemView) {
        super(itemView);
        linearLayout=itemView.findViewById(R.id.ll_main);
        textView=itemView.findViewById(R.id.tv_main);
       }
      }
     
      @NonNull
      @Override
      public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
       View inflate = LayoutInflater.from(getApplicationContext()).inflate(R.layout.item_demo,parent, false);
       return new ViewHolder(inflate);
      }
     
      @Override
      public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
     
      }
     
      @Override
      public int getItemCount() {
       return list.size();
      }
     }
     
     class CallBack extends ItemTouchHelper.Callback{
      @Override
      public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
       return makeMovementFlags(0,ItemTouchHelper.LEFT);
      }
     
      @Override
      public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
       return false;
      }
     
      @Override
      public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
       /**
        * call max distance start onSwiped call
        */
      }
     
      @Override
      public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
     
     
       if (actionState==ItemTouchHelper.ACTION_STATE_SWIPE){
        /**
         * get {@link TextView#getWidth()}
         */
        ViewGroup viewGroup= (ViewGroup) viewHolder.itemView;
        TextView textView = (TextView) viewGroup.getChildAt(1);
        ViewGroup.LayoutParams layoutParams = textView.getLayoutParams();
        if (Math.abs(dX)<=layoutParams.width){
         /**
          * move {@link RecyclerView.ViewHolder} distance
          */
         viewHolder.itemView.scrollTo((int) -dX,0);
         /**
          * callAction or register click bind view
          */
        }
       }
      }
     }
     
     @Override
     protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
     
      recyclerView=findViewById(R.id.rv_main);
      list.add(1);
      list.add("2");
      MyAdpter myAdpter=new MyAdpter();
      LinearLayoutManager linearLayoutManager=new LinearLayoutManager(getApplicationContext());
      linearLayoutManager.setOrientation(RecyclerView.VERTICAL);
      recyclerView.setLayoutManager(linearLayoutManager);
      recyclerView.setAdapter(myAdpter);
      ItemTouchHelper itemTouchHelper=new ItemTouchHelper(new CallBack());
      itemTouchHelper.attachToRecyclerView(recyclerView);
     }
    }
    
    <?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.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">
     
     <androidx.recyclerview.widget.RecyclerView
      android:id="@+id/rv_main"
      app:layout_constraintLeft_toLeftOf="parent"
      app:layout_constraintRight_toRightOf="parent"
      app:layout_constraintTop_toTopOf="parent"
      app:layout_constraintBottom_toBottomOf="parent"
      android:layout_width="0dp"
      android:layout_height="0dp">
     
     </androidx.recyclerview.widget.RecyclerView>
     
    </androidx.constraintlayout.widget.ConstraintLayout>
    
    <?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:paddingBottom="10dp"
     xmlns:app="http://schemas.android.com/apk/res-auto">
     
     <LinearLayout
      android:id="@+id/ll_main"
      android:background="@color/colorPrimaryDark"
      app:layout_constraintTop_toTopOf="parent"
      app:layout_constraintLeft_toLeftOf="parent"
      app:layout_constraintRight_toRightOf="parent"
      android:layout_width="0dp"
      android:layout_height="200dp"
      android:orientation="horizontal">
     
     </LinearLayout>
     
     <TextView
      android:textColor="#ffffff"
      android:gravity="center"
      android:id="@+id/tv_main"
      android:textSize="34sp"
      android:text="删 除"
      android:background="@color/colorAccent"
      app:layout_constraintLeft_toRightOf="@id/ll_main"
      app:layout_constraintTop_toTopOf="@id/ll_main"
      app:layout_constraintBottom_toBottomOf="@id/ll_main"
      android:layout_width="180dp"
      android:layout_height="0dp">
     
     </TextView>
     
     
     
    </androidx.constraintlayout.widget.ConstraintLayout>

    效果图:

    以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持lingkb。

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