OkHttpClient创建方式不同:
okhttp直接newOkHttpClient,而okhttp3中提供了Builder,很好的使用了创建者设计模式-
cookie的设置方式不同:
okhttp调用OkHttpClient.setCookieHandler(),
CookieHandler是Android SDK提供的标注的cookie管理,
CookieHandler 的子类CookieManager实现了cookie的具体管理方法,构建CookieManager需要实现 CookieStore接口,系统提供了一个默认的实现CookieStoreImpl,只负责把cookie存储在内存中。okhttp3中已经没有setCookieHandler(),而改成了cookieJar,新增了Builder,用Builder构建okhttp,
设置cookie在Builder的cookieJar方法中设置post消息体构建方式不同okhttp使用MultipartBuilder, FormEncodingBuilder构建post消息体,最终构建出来的都是RequestBody,
而okhttp3增加了RequestBody的子类,构造器放到了RequestBody的子类中,
MultipartBody.Builder既可以添加表单数据,也可以添加文件等二进制数据 -
Call和Callback不同
okhttp的Callback() 是
void onFailure(Request request, IOException e);
void onResponse(Response response) throws IOException;okhttp3 的Callback有
void onFailure(Call call, IOException e);
void onResponse(Call call, Response response) throws IOException;okhttp3对Call做了更简洁的封装,okhttp3 Call是个接口,
okhttp的call是个普通class,
注意,无论哪个版本,call都不能执行多次,多次执行需要重新创建。 对https支持的不同
okhttp默认调用了getDefaultSSLSocketFactory(),该方法提供了默认的SSLSocketFactory,
就算不设置SSLSocketFactory也可以支持https,setSslSocketFactory没有做非空判断,如果设置为空,则使 用默认的SSLSocketFactory。
okhttp3设置https的方法sslSocketFactory,对SSLSocketFactory做了非空判断,为空会抛出异常。
如果不主动设置SSLSocketFactory,okhttp3也提供了默认的https支持
if (builder.sslSocketFactory != null || !isTLS) {
this.sslSocketFactory = builder.sslSocketFactory;
} else {
try {
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, null, null);
this.sslSocketFactory = sslContext.getSocketFactory();
} catch (GeneralSecurityException e) {
throw new AssertionError(); // The system has no TLS. Just give up.
}
}OkHttp的基本使用
HTTP GET OkHttpClient client = new OkHttpClient();
String doGet(String url) throws IOException {
Request request = new Request.Builder().url(url).build();
Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
return response.body().string();
} else {
return ""; //根据自己的需要做异常数据处理
}
}
Request是OkHttp中访问的请求,Builder是辅助类。
Response即OkHttp中的响应。
Response类:
public boolean isSuccessful()
// Returns true if the code is in [200..300), which means the request was successfully received, understood, and accepted.
response.body()返回ResponseBody类可以方便的获取string
public final String string() throws IOException
// Returns the response as a string decoded with the charset of the Content-Type header.
// If that header is either absent or lacks a charset, this will attempt to decode the response body as UTF-8.
Throws:IOException当然也能获取到流的形式:
public final InputStream byteStream()
HTTP POST POST提交Json数据
public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
OkHttpClient client = new OkHttpClient();
String post(String url, String jsonstr) throws IOException {
RequestBody body = RequestBody.create(JSON, jsonstr);
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
return response.body().string();
} else {
return ""; //根据自己的需要做异常数据处理
}
}
使用Request的post()来提交请求体RequestBody
POST提交键值对很多时候我们会需要通过POST方式把键值对数据传送到服务器。
OkHttp提供了很方便的方式来做这件事情。
OkHttpClient client = new OkHttpClient();
String post(String url, String json) throws IOException {
RequestBody formBody = new FormEncodingBuilder()
.add("platform", "android")
.add("name", "robert")
.add("info", "abcdefg")
.build();
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
return response.body().string();
} else {
return ""; //根据自己的需要做异常数据处理
}
}