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：

来源：https://blog.csdn.net/s452195377/article/details/107593732