OkHttp的使用

在build.gradle中引用如下代码

dependencies {
   // define a BOM and its version
   implementation(platform("com.squareup.okhttp3:okhttp-bom:4.10.0"))

   // define any required OkHttp artifacts without version
   implementation("com.squareup.okhttp3:okhttp")
   implementation("com.squareup.okhttp3:logging-interceptor")
}

在AndroidManifest 的Application 节点中添加

android:usesCleartextTraffic="true"

在AndroidManifest中添加网络请求

<uses-permission android:name="android.permission.INTERNET" /> 
<!-- 检查网络可用性 -->

创建HttpUtil.java类

package com.example.myapplication;
//引包
import okhttp3.OkHttpClient;
import okhttp3.Request;
//http工具类封装
public class HttpUtil {
    public static void sendOkHttpRequest(String address,okhttp3.Callback callback){
        OkHttpClient client=new OkHttpClient();
        Request request=new Request.Builder().url(address).build();
        client.newCall(request).enqueue(callback);
    }
}

异步调用HttpUtil获取网络信息

HttpUtil.sendOkHttpRequest(url, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                e.printStackTrace();
                //线程回到主线程，否则系统交出现错调
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Log.d("Web","Fail");
                    }
                });
            }
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responseText = response.body().string();
                //线程回到主线程，否则系统交出现错调
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        
                    }

                });
            }
        });