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。