准备
在gradle中添加
compile 'com.squareup.okhttp3:okhttp:3.8.1'
在manifest中添加访问网络权限
<uses-permission android:name="android.permission.INTERNET"/>
Okhttp网络请求分两种模式 1. 同步请求 （直接在所在请求的线程中进行请求操作）2.异步请求（开启新线程，在OKHttp请求线程池中进行请求操作），由于Android 4.0以后不能在主线程中进行网络请求，会报android.os.NetworkOnMainThreadException，所以在Android平台上使用异步请求比较好，在Android使用同步请求的话还是要开子线程。
Get请求
- 同步get请求
private OkHttpClient mClient=new OkHttpClient();
public static final String BASE_URL="http://greatfeng.top/app";
new Thread(()-> {
try {
run();
} catch (Exception e) {
e.printStackTrace();
}
}).start();
public void run() throws Exception {
Request request = new Request.Builder()
.url(BASE_URL+"/weather?cityname="+"上海")
.build();
Response response = mClient.newCall(request).execute();
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
Headers responseHeaders = response.headers();
for (int i = 0; i < responseHeaders.size(); i++) {
System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
}
System.out.println(response.body().string());
}
- 异步Get请求
private OkHttpClient mClient=new OkHttpClient();
public static final String BASE_URL="http://greatfeng.top/app";
public void run() throws Exception {
Request request = new Request.Builder()
.url(BASE_URL+"/weather?cityname="+"上海")
.build();
mClient.newCall(request).enqueue(new Callback() {
@Override public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override public void onResponse(Call call, Response response) throws IOException {
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
Headers responseHeaders = response.headers();
for (int i = 0, size = responseHeaders.size(); i < size; i++) {
System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
}
System.out.println(response.body().string());
}
});
}
post请求
- post表单
private OkHttpClient mClient=new OkHttpClient();
public static final String BASE_URL="http://greatfeng.top/app";
public void run() throws Exception {
RequestBody formBody = new FormBody.Builder()
.add("name", "libai")
.add("pwd", "libai")
.add("email", "libai@gmail.com")
.build();
Request request = new Request.Builder()
.url(BASE_URL+"/user/signIn")
.post(formBody)
.build();
mClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
Headers responseHeaders = response.headers();
for (int i = 0, size = responseHeaders.size(); i < size; i++) {
System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
}
System.out.println(response.body().string());
}
});
}
- 上传文件
private OkHttpClient mClient=new OkHttpClient();
public static final String BASE_URL="http://greatfeng.top/app";
public static final MediaType MEDIA_TYPE_PNG
= MediaType.parse("image/png");
public void run() throws Exception {
File file = new File(Environment.getExternalStorageDirectory(),"DCIM/Camera/9075ed53cf61f8f54bde0d664fd28a80.jpg");
RequestBody requestBody = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("file", "ic.jpg",
RequestBody.create(MEDIA_TYPE_PNG, file))
.build();
Request request = new Request.Builder()
.url(BASE_URL+"/user/upload")
.post(requestBody)
.build();
mClient.newCall(request).enqueue(new Callback() {
@Override public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override public void onResponse(Call call, Response response) throws IOException {
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
Headers responseHeaders = response.headers();
for (int i = 0, size = responseHeaders.size(); i < size; i++) {
System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
}
System.out.println(response.body().string());
}
});
}
- 上传文件加表单
// 要上传文件的时候添加表单只需在请求体中加入 .addFormDataPart()添加，其余和之前上传文件一样，
// 请求网址改为.url(BASE_URL+"/user/upload/data")
RequestBody requestBody = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("data","hello World")
.addFormDataPart("file", "ic.jpg",
RequestBody.create(MEDIA_TYPE_PNG, file))
.build();
下载文件
private static final String TAG = "MainActivity";
private OkHttpClient mClient=new OkHttpClient();
public static final String BASE_URL="http://greatfeng.top/wifi.apk";
public void run() throws Exception {
Request request = new Request.Builder()
.url(BASE_URL)
.build();
mClient.newCall(request).enqueue(new Callback() {
@Override public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
Log.d(TAG, "server contacted and has file");
boolean writtenToDisk = writeResponseBodyToDisk(response.body());
Log.d(TAG, "file download was a success? " + writtenToDisk);
} else {
Log.d(TAG, "server contact failed");
}
}
});
}
private boolean writeResponseBodyToDisk(ResponseBody body) {
try {
File file = new File(Environment.getExternalStorageDirectory(),"test.zip");
InputStream inputStream = null;
OutputStream outputStream = null;
try {
byte[] fileReader = new byte[4096];
long fileSize = body.contentLength();
long fileSizeDownloaded = 0;
inputStream = body.byteStream();
outputStream = new FileOutputStream(file);
while (true) {
int read = inputStream.read(fileReader);
if (read == -1) {
break;
}
outputStream.write(fileReader, 0, read);
fileSizeDownloaded += read;
Log.d(TAG, "file download: " + fileSizeDownloaded + " of " + fileSize);
}
outputStream.flush();
return true;
} catch (IOException e) {
Log.e(TAG, "writeResponseBodyToDisk: ", e);
return false;
} finally {
if (inputStream != null) {
inputStream.close();
}
if (outputStream != null) {
outputStream.close();
}
}
} catch (IOException e) {
Log.e(TAG, "writeResponseBodyToDisk: ",e );
return false;
}
}
添加请求头
- 所有请求都添加请求头
Interceptor mInterceptor=new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
return chain.proceed(chain.request().newBuilder()
.addHeader("Content-Type", "application/json")
.build());
}
OkHttpClient mClient = new OkHttpClient.Builder()
.addInterceptor(mInterceptor)
.build();
- 单个请求添加请求头
Request request = new Request.Builder()
.url("http://incivility.net/download/test.zip")
.header("User-Agent", "OkHttp Headers.java")
.addHeader("Accept", "application/json; q=0.5")
.addHeader("Accept", "application/vnd.github.v3+json")
.build();
取消请求
Call call = mClient.newCall(request);
call.cancel();
配置Timeout
OkHttpClient mClient = new OkHttpClient.Builder()
.connectTimeout(10, TimeUnit.SECONDS)
.writeTimeout(10, TimeUnit.SECONDS)
.readTimeout(30, TimeUnit.SECONDS)
.build();
配置单独的OkHttpClient
OkHttpClient copy = mClient.newBuilder()
.readTimeout(500, TimeUnit.MILLISECONDS)
.build();
配置basic认证
public void run() throws Exception {
mClient = new OkHttpClient.Builder()
.authenticator((Route route, Response response) -> {
System.out.println("Authenticating for response: " + response);
System.out.println("Challenges: " + response.challenges());
String credential = Credentials.basic("tomcat", "tomcats");
if (credential.equals(response.request().header("Authorization"))) {
return null; // If we already failed with these credentials, don't retry.
}
return response.request().newBuilder()
.header("Authorization", credential)
.build();
})
.build();
Request request = new Request.Builder()
.url(BASE_URL + "/manager/html")
.build();
mClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
Headers responseHeaders = response.headers();
for (int i = 0, size = responseHeaders.size(); i < size; i++) {
System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
}
System.out.println(response.body().string());
}
});
}
配置代理
private OkHttpClient mClient = new OkHttpClient.Builder()
.proxy(new Proxy(
Proxy.Type.HTTP, //代理类型
new InetSocketAddress("代理服务器地址",代理端口号)))
.proxyAuthenticator(( route, response)->
{
Request request = response.request();
String credential = Credentials.basic("代理账号", "代理密码");
return request.newBuilder()
.header( "Proxy-Authorization" , credential)
.build();
})
.build();
添加打印信息
在gradle中添加
compile 'com.squareup.okhttp3:logging-interceptor:3.8.1'
private OkHttpClient mClient = new OkHttpClient.Builder()
.addInterceptor(new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY))
.build();
使用cache
Cache-Control
File cacheFile = new File(App.getAppContext().getCacheDir(), "cache");
Cache cache = new Cache(cacheFile, 1024 * 1024 * 100); //100Mb
OkHttpClient mClient = new OkHttpClient.Builder()
.addInterceptor(new HttpCacheInterceptor())
.cache(cache)
.build();
class HttpCacheInterceptor implements Interceptor {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request();
if (!isNetConnected(App.getAppContext())) {
request = request.newBuilder()
.cacheControl(CacheControl.FORCE_CACHE)
.build();
Log.d("Okhttp", "no network");
}
Response originalResponse = chain.proceed(request);
if (isNetConnected(App.getAppContext())) {
String cacheControl = request.cacheControl().toString();
return originalResponse.newBuilder()
.removeHeader("Pragma")
.removeHeader("Cache-Control")
.header("Cache-Control", cacheControl)
.build();
} else {
return originalResponse.newBuilder()
.removeHeader("Pragma")
.removeHeader("Cache-Control")
.header("Cache-Control", "public, only-if-cached, max-stale=2419200")
.build();
}
}
}
public static boolean isNetConnected(Context context) {
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (cm != null) {
NetworkInfo[] infos = cm.getAllNetworkInfo();
if (infos != null) {
for (NetworkInfo ni : infos) {
if (ni.isConnected()) {
return true;
}
}
}
}
return false;
}
