okhttp的使用

okhttp的使用

An HTTP & HTTP/2 client for Android and Java applications. okhttp是一个很热门的框架，使用起来比以前的简单而且功能强大. 关于这一部分的发展大概是如下图



okhttp的github地址

代码实现

package com.example.whoami.okhttpdemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

import com.google.gson.reflect.TypeToken;

import java.io.IOException;
import java.lang.reflect.Type;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
//通过get请求数据
public void get(View view){
//下面的代码不可以放在UI线程里面
String url = "http://112.124.22.238:8081/course_api/banner/query/?type=1";
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(url)
.build();
try {
Response response = client.newCall(request).execute();//异步
if(response.isSuccessful()) {
ResponseBody body = response.body();
String json = body.string();
}
} catch (IOException e) {
e.printStackTrace();
}

}
public void get_1(View view){

String url = "http://112.124.22.238:8081/course_api/banner/query/?type=1";
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(url)
.build();

client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {

ResponseBody body = response.body();
String json = body.string();

}
});

}
public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
//客户端post json代码如下
public void  post(){
OkHttpClient client = new OkHttpClient();
String json = "json";
RequestBody body = RequestBody.create(JSON,json);
Request request = new Request.Builder()
.url("uri")
.post(body)
.build();
try {
Response response = client.newCall(request).execute();
if(response.isSuccessful()){
String dataForService = response.body().string();
}
} catch (IOException e) {
e.printStackTrace();
}
}

//form 表单提交
public void post_1(){
OkHttpClient client = new OkHttpClient();
FormBody body = new FormBody.Builder()
.add("key","value")
.add("key", "value")
.add("key","value")
.add("key","value")
.build();
Request request = new Request.Builder()
.url("url")
.post(body)
.build();
try {
Response response = client.newCall(request).execute();
} catch (IOException e) {
e.printStackTrace();
}
}
//通过gson解析对象
//json = [{name:"a"},{name:"a"},{name:"a"}]
public void useGson(String json){
/*
Type type =new  TypeToken<List<MyObject>>(){}.getType();
MyObjecs = mGson.fromJson(json,type);
*/
//使用okhttp如果出错了有可能版本和其他的版本出错

}
}

配置

compile 'com.squareup.okhttp3:okhttp:3.3.1'
compile 'com.google.code.gson:gson:2.6.2'

参考博客

张鸿洋的博客