首先xml文件如下：
在mainactivity中的代码如下：
protected void onCreate(Bundle savedInstanceState) {
new Thread(new Runnable() {
@Override
public void run() {
NetUtil_tianqi.doGet()；
}
}
).start();
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
关键的http代码如下。这是实现了一个工具类：至于代码为什么这么写，看下图。或者看视频。
安卓http访问springboot的视频
package com.example.app01;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class NetUtil_tianqi {
public static String doGet(){
String result="";
BufferedReader reader=null;
String bookJSonString =null;
try {
//1.建立连接
HttpURLConnection httpURLConnection=null;
String url="http://10.0.2.2:80/books/1/2";
URL requestURL=new URL(url);
httpURLConnection=(HttpURLConnection) requestURL.openConnection();
httpURLConnection.setRequestMethod("GET");
httpURLConnection.setConnectTimeout(5000);
httpURLConnection.connect();
//2.获取二进制流
InputStream inputStream =httpURLConnection.getInputStream();
//3.将二进制流包装
reader=new BufferedReader(new InputStreamReader(inputStream));
//4.从BufferedReader中一行行读取字符串。使用StringBuilder接受。
String line;
StringBuilder builder=new StringBuilder();
while ((line=reader.readLine())!=null)
{
builder.append(line);
builder.append("n");
}
if(builder.length()==0){
return null;
}
//5.返回json对应的String数据。
result=builder.toString();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
}
