本篇文章给大家分享的是有关怎么在android中利用recyclerview制作一个聊天界面，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。
实现代码：
package com.itheima74.chatui;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.View;import android.widget.Button;import android.widget.EditText;import java.util.ArrayList;public class MainActivity extends AppCompatActivity { private RecyclerView recyclerview; private EditText et_input; private ArrayList<Msg> mMsgList; private MsgAdapter mMsgAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); initData(); initAdapter(); } private void initAdapter() { mMsgAdapter = new MsgAdapter(mMsgList); recyclerview.setAdapter(mMsgAdapter); } private void initData() { mMsgList = new ArrayList<>(); mMsgList.add(new Msg("Hello!", Msg.TYPE_RECEIVE)); mMsgList.add(new Msg("Hello! Who is that?", Msg.TYPE_SEND)); mMsgList.add(new Msg("This is Jack,Nice to meet you!", Msg.TYPE_RECEIVE)); } private void initView() { recyclerview = (RecyclerView) findViewById(R.id.recyclerview); et_input = (EditText) findViewById(R.id.et_input); Button bt_send = (Button) findViewById(R.id.bt_send); LinearLayoutManager layoutManager = new LinearLayoutManager(this); layoutManager.setOrientation(LinearLayoutManager.VERTICAL); recyclerview.setLayoutManager(layoutManager); bt_send.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String content = et_input.getText().toString().trim(); // 如果用户没有输入,则是一个空串"" if (!content.isEmpty()) { mMsgList.add(new Msg(content, Msg.TYPE_SEND)); // 通知数据适配器刷新界面 mMsgAdapter.notifyDataSetChanged(); // 定位到最后一行 recyclerview.scrollToPosition(mMsgList.size() - 1); // 输入框置空 et_input.setText(""); } } }); }}<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#d8e0e8" android:orientation="vertical"> <android.support.v7.widget.RecyclerView android:id="@+id/recyclerview" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <EditText android:id="@+id/et_input" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:hint="请输入要发送的内容" /> <Button android:id="@+id/bt_send" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="发送" /> </LinearLayout></LinearLayout>package com.itheima74.chatui;class Msg { static final int TYPE_RECEIVE = 1; static final int TYPE_SEND = 2; String content; int type; Msg(String content, int type) { this.content = content; this.type = type; }}package com.itheima74.chatui;import android.support.v7.widget.RecyclerView;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import java.util.ArrayList;class MsgAdapter extends RecyclerView.Adapter<MsgAdapter.ViewHolder> { private ArrayList<Msg> mMsgList; MsgAdapter(ArrayList<Msg> mMsgList) { this.mMsgList = mMsgList; } @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = View.inflate(parent.getContext(), R.layout.recyclerview_item, null); return new ViewHolder(view); } @Override public void onBindViewHolder(ViewHolder holder, int position) { Msg msg = mMsgList.get(position); if (msg.type == Msg.TYPE_RECEIVE) { holder.tv_receive.setVisibility(View.VISIBLE); holder.tv_send.setVisibility(View.GONE); holder.tv_receive.setText(msg.content); } else { holder.tv_send.setVisibility(View.VISIBLE); holder.tv_receive.setVisibility(View.GONE); holder.tv_send.setText(msg.content); } } @Override public int getItemCount() { return mMsgList.size(); } static class ViewHolder extends RecyclerView.ViewHolder { private TextView tv_receive; private TextView tv_send; ViewHolder(View itemView) { super(itemView); tv_receive = (TextView) itemView.findViewById(R.id.tv_receive); tv_send = (TextView) itemView.findViewById(R.id.tv_send); } }}xml：
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="10dp"> <TextView android:id="@+id/tv_receive" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/message_left" android:gravity="center" android:text="who?" android:textSize="20sp" /> <TextView android:id="@+id/tv_send" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_below="@id/tv_receive" android:background="@drawable/message_right" android:gravity="center" android:text="i am your father" android:textSize="20sp" /></RelativeLayout>以上就是怎么在android中利用recyclerview制作一个聊天界面，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注编程网行业资讯频道。
