OkHttp
implementation("com.squareup.okhttp3:okhttp:4.9.0")
<uses-permission android:name="android.permission.INTERNET"/>
同步与异步请求
package com.example.myokhttp;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import org.jetbrains.annotations.NotNull;
import java.io.IOException;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private OkHttpClient okHttpClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
okHttpClient = new OkHttpClient();
}
public void getSync(View view) {
// 必须放在线程里
new Thread(()->{
Request build = new Request.Builder().url("https://www.httpbin.org/get?a=1&b=2").build();
// 准备好请求的call对象
Call call = okHttpClient.newCall(build);
// 同步请求
try {
Response response = call.execute(); // 会阻塞
Log.d(TAG, "getSync: " + response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}).start();
}
public void getAsync(View view) {
Request build = new Request.Builder().url("https://www.httpbin.org/get?a=1&b=2").build();
// 准备好请求的call对象
Call call = okHttpClient.newCall(build);
// 异步请求
call.enqueue(new Callback() {
@Override
public void onFailure(@NotNull Call call, @NotNull IOException e) {
}
// 只代表和服务器的请求成功了
@Override
public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
if(response.isSuccessful()){
Log.d(TAG, "getSync: " + response.body().string());
}
}
});
}
public void postSync(View view) {
new Thread(()->{
FormBody formBody = new FormBody.Builder().add("a", "1").add("b", "2").build();
Request build = new Request.Builder().url("https://www.httpbin.org/post")
.post(formBody).build();
// 准备好请求的call对象
Call call = okHttpClient.newCall(build);
// 同步请求
try {
Response response = call.execute(); // 会阻塞
Log.d(TAG, "postSync: " + response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}).start();
}
public void postASync(View view) {
FormBody formBody = new FormBody.Builder().add("a", "1").add("b", "2").build();
Request build = new Request.Builder().url("https://www.httpbin.org/post")
.post(formBody).build();
// 准备好请求的call对象
Call call = okHttpClient.newCall(build);
call.enqueue(new Callback() {
@Override
public void onFailure(@NotNull Call call, @NotNull IOException e) {
}
@Override
public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
if(response.isSuccessful()){
Log.d(TAG, "postAsync: " + response.body().string());
}
}
});
}
}
上传文件
@Test
public void uploadFileTest() throws IOException {
File file1 = new File("C:\\Users\\86139\\Downloads\\1.txt");
File file2 = new File("C:\\Users\\86139\\Downloads\\2.txt");
OkHttpClient client = new OkHttpClient();
MultipartBody multipartBody = new MultipartBody.Builder()
.addFormDataPart("file1", file1.getName(), RequestBody.create(file1, MediaType.parse("text/plain")))
.addFormDataPart("file2", file2.getName(), RequestBody.create(file2, MediaType.parse("text/plain")))
.build();
Request request = new Request.Builder().url("https://www.httpbin.org/post").post(multipartBody).build();
Call call = client.newCall(request);
Response response = call.execute();
System.out.println(response.body().string());
}
提交json
@Test
public void jsonTest() throws IOException {
OkHttpClient client = new OkHttpClient();
// https://www.runoob.com/http/http-content-type.html
RequestBody requestBody = RequestBody.create("{\"a\":1, \"b\":2}", MediaType.parse("application/json"));
Request request = new Request.Builder().url("https://www.httpbin.org/post").post(requestBody).build();
Call call = client.newCall(request);
Response response = call.execute();
System.out.println(response.body().string());
}
OkHttp的配置
拦截器
@Test
public void interceptorTest() throws IOException {
OkHttpClient okHttpClient = new OkHttpClient.Builder().addInterceptor(new Interceptor() {
@NotNull
@Override
public Response intercept(@NotNull Chain chain) throws IOException {
// 前置处理
Request request = chain.request().newBuilder().addHeader("os", "android")
.addHeader("version", "1").build();
Response response = chain.proceed(request);
// 后置处理
return response;
}
}).addNetworkInterceptor(new Interceptor() { // 一定在addInterceptor后面执行
@NotNull
@Override
public Response intercept(@NotNull Chain chain) throws IOException {
System.out.println(chain.request().header("version"));
return chain.proceed(chain.request());
}
}).build();
Request build = new Request.Builder().url("https://www.httpbin.org/get?a=1&b=2").build();
try {
Call call = okHttpClient.newCall(build);
Response response = call.execute();
System.out.println(response.body().string());
} finally {
}
}
缓存
new OkHttpClient.Builder()
.cache(new Cache(new File("C:\\Users\\86139\\Downloads\\2.txt"), 1024*1024))
.build();
Cookie
package com.example.myokhttp;
import org.jetbrains.annotations.NotNull;
import org.junit.Test;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import okhttp3.Call;
import okhttp3.Cookie;
import okhttp3.CookieJar;
import okhttp3.FormBody;
import okhttp3.HttpUrl;
import okhttp3.OkHttp;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class CookieUnitTest {
Map<String, List<Cookie>> map = new HashMap<>();
@Test
public void cookieTest() throws IOException {
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.cookieJar(new CookieJar() {
@Override
public void saveFromResponse(@NotNull HttpUrl httpUrl, @NotNull List<Cookie> list) {
map.put(httpUrl.host(), list);
}
@NotNull
@Override
public List<Cookie> loadForRequest(@NotNull HttpUrl httpUrl) {
List<Cookie> list = CookieUnitTest.this.map.get(httpUrl.host());
return list == null ? new ArrayList<>() : list;
}
}).build();
FormBody formBody = new FormBody.Builder()
.add("username", "自己注册")
.add("password", "自己注册")
.build();
Request request = new Request.Builder()
.url("https://www.wanandroid.com/user/login")
.post(formBody).build();
Call call = okHttpClient.newCall(request);
try {
Response response = call.execute();
System.out.println(response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
request = new Request.Builder().url("https://www.wanandroid.com/lg/collect/list/0/json").build();
call = okHttpClient.newCall(request);
try {
Response response = call.execute();
System.out.println(response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}
}
