首先在github上寻找okhttp依赖
我们首先创建一个OkHttpClient实例
OkHttpClient client = new OkHttpClient();
接下来如果想发起一条HTTP请求,就需要创建一个Request对象
Request request = new Request.Builder().build();
我们要在build()方法之间连缀很多其他方法来丰富这个Requset对象,比如可以通过url()方法来设置目标网络地址
Request request = new Request.Builder()
.url("https://www.baidu.com")
.build();
之后调用OkHttpClient的newCall()方法来创建一个Call对象,并调用他的execute()方法来发送请求并获取服务器返回的数据
Response response = client.newCall(request).execute();
其中Response对象就是服务器返回的数据了,我们可以通过如下写法来得到返回的具体内容
String responseData = response.body().string();
发起POST请求需要先构建出一个RequestBody对象来存放待提交的参数,
RequestBody requestBody = new FormBody.Builder()
.add("username","admin")
.add("password","123456")
.build();
然后再Request.Bulider中调用一下post()方法,并将RequestBody对象传入
Request request1 = new Request.Builder()
.url("https://www.baidu.com")
.post(requestBody)
.build();
eg:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
TextView responseText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button sendRequest = findViewById(R.id.send_request);
responseText= findViewById(R.id.response_text);
sendRequest.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (v.getId()==R.id.send_request){
sendRequestWithOkHttp();
}
}
private void sendRequestWithOkHttp(){
new Thread(new Runnable() {
@Override
public void run() {
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("https://www.baidu.com")
.build();
Response response = client.newCall(request).execute();
String responseData = response.body().string();
showResponse(responseData);
}catch (Exception e){
e.printStackTrace();
}
}
}).start();
}
private void showResponse(final String response){
runOnUiThread(new Runnable() {
@Override
public void run() {
responseText.setText(response);
}
});
}
}