Android 第三方组件Volley加载网络

喜欢ヅ旅行 2022-07-17 01:41 214阅读 0赞

**需实现效果：实现本类监听，点击出现从新闻列表和天气情况。**

**布局：**

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout 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="com.example.administrator.jreduch08.VolleyActivity">
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/bt1"
        android:text="访问" />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/show"
            android:layout_below="@+id/bt1" />
    </RelativeLayout>

**代码：**

**2.利用Get放法加载内部文本**

package com.example.administrator.jreduch08;
    
    import android.os.Bundle;
    import android.support.v7.app.AppCompatActivity;
    import android.view.View;
    import android.widget.Button;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import com.android.volley.Request;
    import com.android.volley.RequestQueue;
    import com.android.volley.Response;
    import com.android.volley.VolleyError;
    import com.android.volley.toolbox.StringRequest;
    import com.android.volley.toolbox.Volley;
    import com.example.administrator.jreduch08.util.StringGetRequest;
    import com.example.administrator.jreduch08.util.StringPostRequest;
    import com.example.administrator.jreduch08.util.UrlUtil;
    
    public class VolleyActivity extends AppCompatActivity implements View.OnClickListener{
        private Button bt1;
        private TextView show;
        private RequestQueue queue;
        //请求队列
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_volley);
            bt1= (Button) findViewById(R.id.bt1);
            show= (TextView) findViewById(R.id.show);
            bt1.setOnClickListener(this);
            //本类监听。若不写点击无反应
            queue = Volley.newRequestQueue(this);
            //初始化 Volley 请求队列
        }
    
        @Override
        public void onClick(View v) {
            int id=v.getId();
            if(id==R.id.bt1){
                Toast.makeText(getBaseContext(),"点击",Toast.LENGTH_SHORT).show();
                getWeather();
            }
        }
        public void GetVolley(){
            String url="http://192.168.1.40:8080/HttpTest/index.jsp?option=getUser&uName=jerehedu";
            StringRequest sr=new StringRequest(url, new Response.Listener<String>() {
                @Override
                public void onResponse(String s) {
                  show.setText(s);
                }
             }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError volleyError) {
                   show.setText(volleyError.getMessage());
                }
            });
            queue.add(sr);
        }

**2.利用Post方法加载新闻列表**

public void PostVolley(){
            String url= UrlUtil.channelUrl;
            StringPostRequest spr=new StringPostRequest(url, new Response.Listener<String>() {
                @Override
                public void onResponse(String s) {
                    show.setText(s);
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError volleyError) {
                }
            });
            spr.putHeader("apiKey","5b46143955a4b1ff1b470a94315625cd");
            queue.add(spr);
        }

**3.利用Get方法加载天气消息**

public void getWeather(){
            String url=UrlUtil.weatherUrl+"?location=yantai";
            StringGetRequest sgr=new StringGetRequest(Request.Method.GET,
                    url, new Response.Listener<String>() {
                @Override
                public void onResponse(String s) {
                  show.setText(s);
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError volleyError) {
                   show.setText(volleyError.getMessage());
                }
            });
            sgr.putHeaders("apiKey","3f37b44e3115841957414d7c4bf6c0f5");
            queue.add(sgr);
    <span style="font-size:18px;"><strong>    }</strong></span>

**实现效果：**

**第一种方法显示效果：**

**（三星Note4应该是不支持这种方法，**

**相同代码在别的手机可以测试出来**，AV画质请见谅。）

**![Center][]**

**第二种方法显示效果：**

![Center 1][]

**第三种方法显示效果：**  
![Center 2][]

[Center]: /images/20220717/fc799c0a2c274fb88d04ede9b21dfe9c.png
[Center 1]: /images/20220717/b6e30e497bf84c9f88c1ba9d376bdedd.png
[Center 2]: /images/20220717/1dd26248c7ae4409a6fb19892c3a61a7.png