视频聊天室源码，按住对话框右滑显示删除实现的相关代码

1.设计界面

界面导入 recycleview 的包

Friendweixin.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context=".MainActivity"
 xmlns:app="http://schemas.android.com/apk/res-auto">
 <androidx.recyclerview.widget.RecyclerView
 android:id="@+id/swipe"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_margin="8dp" //边距为 8dp
 android:overScrollMode="never" //设置滑动到边缘时无效果模式
 android:scrollbars="none" //滚动条隐藏
 app:layout_constraintEnd_toEndOf="parent"
//结束时对其下一个 view 结束的位置
 app:layout_constraintStart_toStartOf="parent"
//view1 起始位置对齐 view2 的起始位置
 app:layout_constraintTop_toTopOf="parent" />
//view1 顶部对齐 view2 的顶部
</androidx.constraintlayout.widget.ConstraintLayout

​

Itemweixin.xml:

外层是垂直的 LinearLayout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="50dp"
 android:layout_margin="8dp"
 android:background="@drawable/common_bg"
 android:orientation="vertical">
 <TextView
 android:id="@+id/content"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_marginLeft="8dp" />
</LinearLayout>
Itemtop.xml:
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/header_view"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:background="#3E8841"
 android:padding="10dp"
 android:textColor="@android:color/white"
 android:textSize="14sp"
 tools:text="@string/app_name" />

2.适应器adapter

Myadapterweixin,java:
package com.example.myapplication1;
import android.content.Context;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class myadapterweixin extends 
RecyclerView.Adapter<myadapterweixin.swipeviewholder> implements 
TouchHelperListener {
 private List<String>list;
 private Context context;
 private View inflater;
 public myadapterweixin(Context context, List<String> list) {
 this.context=context;
 this.list=list;
 }
 @Override
 public swipeviewholder onCreateViewHolder(ViewGroup parent, int 
viewType) {
 inflater= 
LayoutInflater.from(context).inflate(R.layout.itemweixin,parent,false
);
 swipeviewholder swipeviewholder=new swipeviewholder(inflater);
 return swipeviewholder;
 }
 @Override
 public void onBindViewHolder(swipeviewholder holder, int 
position) {
 holder.tvContent.setText(list.get(position));
 }
 @Override
 public int getItemCount() {return list.size();}
 @Override
 public void OnItemDismiss(int position) {
 if (position < 0 || position > getItemCount()) {
 return;
 }
 list.remove(position);
 notifyItemRemoved(position);
 if (position != list.size()) {
 notifyItemRangeChanged(position, list.size() -
position);
 }
 }
 public class swipeviewholder extends RecyclerView.ViewHolder{
 TextView tvContent;
 public swipeviewholder(View itemView) {
 super(itemView);
 tvContent = itemView.findViewById(R.id.content);
 }
 }
}

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