准备工作（也很重要）
首先导入依赖:
implementation 'com.android.support:recyclerview-v7:28.0.0'
添加网络权限还有一些其他的权限：（切记真机测试时打开网络）
<uses-permission android:name="android.permission.RECORD_AUDIO" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_CONTACTS" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
在文件res—>values—>strings.xml中添加：（在主活动的布局文件中使用）
<color name="colorText">#DEE1E6</color>
在文件res—>drawable中添加一张图并且命名为 left.jpg或者(left.png)都可以：如图
创建适配器：
创建Left适配器继承自 RecyclerView.Adapter<Left.ViewHolder>
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.List;
public class Left extends RecyclerView.Adapter<Left.ViewHolder> {
private List<Msg> mlist;
private Context mContext;
public Left(List<Msg> list, Context context){
this.mlist=list;
this.mContext=context;
}
public class ViewHolder extends RecyclerView.ViewHolder {
LinearLayout leftLayout;
LinearLayout rightLayout;
TextView leftText;
TextView rightText;
public ViewHolder(View itemView) {
super(itemView);
leftLayout=itemView.findViewById(R.id.left);
rightLayout=itemView.findViewById(R.id.right);
leftText=itemView.findViewById(R.id.left_text);
rightText=itemView.findViewById(R.id.right_text);
}
}
@Override
public ViewHolder onCreateViewHolder( ViewGroup viewGroup, int i) {
View view=LayoutInflater.from(mContext).inflate(R.layout.item,viewGroup,false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder( ViewHolder viewHolder, int i) {
final Msg msg=mlist.get(i);
switch (msg.getType()){
case RECEIVED:
viewHolder.leftLayout.setVisibility(View.VISIBLE);
viewHolder.rightLayout.setVisibility(View.GONE);
viewHolder.leftText.setText(msg.getContent());
break;
case SENT:
viewHolder.leftLayout.setVisibility(View.GONE);
viewHolder.rightLayout.setVisibility(View.VISIBLE);
viewHolder.rightText.setText(msg.getContent());
break;
}
}
/*
* 告诉RecyclerView一共有多少个子项，直接返回数据源长度
* */
@Override
public int getItemCount() {
return mlist.size();
}
}
RecyclerView的子项布局：在res—>layout文件下创建item.xml文件;
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout
android:id="@+id/left"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:src="@drawable/left"
android:scaleType="fitXY"
android:layout_margin="5dp"
/>
<TextView
android:id="@+id/left_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:gravity="left"
/>
</LinearLayout>
<LinearLayout
android:id="@+id/right"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/right_text"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:gravity="right"
/>
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:src="@drawable/left"
android:scaleType="fitXY"
android:layout_margin="5dp"
/>
</LinearLayout>
</LinearLayout>
创建主活动：
网络请求执行有两种：（okhttp3网络框架）——（详细区别自行百度）
1.同步执行：execute()方法，网络请求不能放在主线程中，所以要创建子线程执行
new Thread(new Runnable() {
@Override
public void run() {
/*
*此处写你需要运行的事件
* */
}
}).start();
2.异步执行：enqueue()，异步执行的方法已注掉
主活动：（复制粘贴时一定要注意所有布局 id 和 控件 id 是否和你自己设置的一致）
package com.example.ft.valuesstyle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import com.example.ft.valuesstyle.net.Api;
import com.google.gson.Gson;
import org.json.JSONException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
/*
* 1.第三方api的学习 图灵机器人
* 2.RecyclerView 多种Item布局时的处理，实现聊天对话的界面
* */
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private List<Msg> list=new ArrayList();
private RecyclerView recyclerView;
private Button button;
private EditText editText;
private String data_r;
private String data_l="";
private Left left;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editText=findViewById(R.id.data_view);
button=findViewById(R.id.send);
recyclerView=findViewById(R.id.re_view);
LinearLayoutManager linearLayoutManager=new LinearLayoutManager(this);
recyclerView.setLayoutManager(linearLayoutManager);
button.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.send:
sentData();
/*try {
aa(data_r);
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}*/
/*
* 此循环判断data_l是否被赋值了
* */
request(data_r);
while (true){
if(!data_l.equals("")){
break;
}
}
addData(data_l,Msg.TYPE.RECEIVED);
//
left=new Left(list,this);
recyclerView.setAdapter(left);
//当有新消息时，刷新显示
left.notifyItemInserted(list.size() - 1);
//定位的最后一行
recyclerView.scrollToPosition(list.size()-1);
editText.setText("");
//完成后清空全局变量
data_l="";
break;
}
}
private void sentData(){
data_r=editText.getText().toString();
Msg msg=new Msg(this.data_r,Msg.TYPE.SENT);
list.add(msg);
}
private void addData(String data, Msg.TYPE type){
Msg msg=new Msg(data,type);
list.add(msg);
}
public void aa(String data) throws JSONException, IOException {
Map map = new HashMap<>();
map.put("text", data);
Map map1 = new HashMap<>();
map1.put("inputText", map);
Map map2 = new HashMap();
map2.put("apiKey", "c00282de107144fb940adab994d9ff98");
map2.put("userId", "225167");
Map map3 = new HashMap();
map3.put("reqType", 0);
map3.put("perception", map1);
map3.put("userInfo", map2);
Gson gson = new Gson();
String param = gson.toJson(map3);
MediaType mediaType1 = MediaType.parse("application/json; charset=utf-8");
final Request request = new Request.Builder()
.url("http://openapi.tuling123.com/openapi/api/v2")
.post(RequestBody.create(mediaType1, param))
.build();
final OkHttpClient okHttpClient = new OkHttpClient();
/*
* 同步执行 核心为这个execute()方法
* */
//ResponseBody response=okHttpClient.newCall(request).execute().body();
new Thread(new Runnable() {
@Override
public void run() {
okhttp3.Call call=okHttpClient.newCall(request);
try {
okhttp3.Response response = call.execute();
String data1 =response.body().string();
JSONObject jsonObject = JSONUtil.parseObj(data1);
System.out.println(jsonObject.get("results"));
String results = jsonObject.get("results").toString().replace("[", "").replace("]", "");
JSONObject jsonObject1 = JSONUtil.parseObj(results);
System.out.println(jsonObject1.get("values"));
String values = jsonObject1.get("values").toString();
JSONObject jsonObject2 = JSONUtil.parseObj(values);
System.out.println(jsonObject2.get("text"));
data_l = jsonObject2.get("text").toString();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
/*
* 异步执行 核心为这个enqueue()方法
* */
/* OkHttpClient okHttpClient = new OkHttpClient();
okHttpClient.newCall(request).enqueue(new okhttp3.Callback() {
@Override
public void onFailure(okhttp3.Call call, IOException e) {
}
@Override
public void onResponse(okhttp3.Call call, okhttp3.Response response) throws IOException {
ResponseBody responseBody = response.body();
JSONObject jsonObject = JSONUtil.parseObj(responseBody.string());
System.out.println(jsonObject.get("results"));
String results = jsonObject.get("results").toString().replace("[", "").replace("]", "");
JSONObject jsonObject1 = JSONUtil.parseObj(results);
System.out.println(jsonObject1.get("values"));
String values = jsonObject1.get("values").toString();
JSONObject jsonObject2 = JSONUtil.parseObj(values);
System.out.println(jsonObject2.get("text"));
data_l = jsonObject2.get("text").toString();
}
});*/
}
}
创建主活动的布局文件
<?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="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/re_view"
android:layout_height="0dp"
android:layout_weight="1"
android:layout_width="match_parent">
</android.support.v7.widget.RecyclerView>
<LinearLayout
android:layout_gravity="end"
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal">
<EditText
android:id="@+id/data_view"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="50dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"/>
<Button
android:text="发送"
android:layout_marginRight="5dp"
android:layout_gravity="center|right"
android:layout_width="60sp"
android:layout_height="40dp"
android:textColor="@color/colorText"
android:background="@color/colorPrimary"
android:id="@+id/send"/>
</LinearLayout>
</LinearLayout>
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