0.参考:
官网:
文档:
1 .导入
- 依赖导入,请看官网上的依赖地址。
- jar包导入,官网上有链接下载。
2 .概念
在Ok http中,有几个类我们需要理解一下:
- OkHttpClient:客户端,理解为就是由它发起请求的
- Request:请求,这个类负责组装起请求的一些基本参数:url,get/post,等等。
- FormBody:请求的Body,在Post请求中,它就负责把请求的Parameter组装起来。
- MultipartBody:Body,说明其也是包装Body体的,对比FormBody,FormBody只能组合String的key-value,而其可以组合其他类型的数据,可以设置MediaType等等。
3 .基本用法
1) 基本的GET请求
同步调回,阻塞当前线程:
OkHttpClient client = new OkHttpClient(); //新建客户端
Request request = new Request.Builder() //新建请求
.get() //get请求
.url("http://publicobject.com/helloworld.txt") //URL
.build();
Response response = client.newCall(request).execute(); //返回对象
if (response.isSuccessful()) { //阻塞线程。
Log.e("code",":"+response.code());
Log.e("body",response.body().string());
}
else {
Log.e("---","不成功");
}
异步回调请求结果:
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.get()
.url("http://publicobject.com/helloworld.txt")
.build();
Call call = client.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e("onFailure",e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
Log.e("body",response.body().string());
}
});
2) 基本的POST请求
POST 提交参数:异步回调,同步的写法如上面。
OkHttpClient okHttpClient = new OkHttpClient();
FormBody formBody = new FormBody.Builder()
.add("1","hehe")
.add("2","xixi")
.build();
Request request = new Request.Builder()
.url("http://www.chestnutplus.com/Test/hello.php")
.post(formBody)
.build();
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e("onFailure",e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
Log.e("onResponse",response.body().string());
}
});
4 .高级一点的用法:
高级?哈哈,先结合Rx吧。虽然Okhttp自身没有结合Rx,但是,我觉得这样还更好呢,因为,我们可以自己来DIY。
RxGet
public Observable<String> RxGet(String url, Map<String, String> map) {
return Observable.create(subscriber -> {
Request request = new Request.Builder()
.get()
.url(HttpUtils.assemblyGetParam(url,map))
.build();
Call call = mOkHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
subscriber.onError(new Throwable("fail,msg:"+(e!=null?e.getMessage():"null")));
}
@Override
public void onResponse(Call call, Response response) throws IOException {
subscriber.onNext(response.body().string());
}
});
});
}
RxPost
public void Post(String url, Map<String, String> map, HttpCallBack callBack) {
FormBody.Builder builder = new FormBody.Builder();
for (String key : map.keySet()) {
builder.add(key,map.get(key));
}
Request request = new Request.Builder()
.url(url)
.post(builder.build())
.build();
mOkHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
if (callBack!=null)
callBack.onFailure("fail,msg:"+(e!=null?e.getMessage():"null"));
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (callBack!=null)
callBack.onSuccess(response.body().string());
}
});
}
5 .来传一下文件吧!
文件的上传,这里只是一个简单的小文件,就是很小的文件,几百K吧。
要使用Post上传。
这里演示了上传一个MP3文件。
public void PostFile(String url, Map<String,String> map, String fileName, byte[] fileBytes, HttpCallBack callBack) {
MultipartBody.Builder body = new MultipartBody.Builder().setType(MultipartBody.FORM);
RequestBody requestBody = RequestBody.create(MediaType.parse("audio/mp3"),fileBytes);
body.addFormDataPart(fileName,"fileName"+".mp3",requestBody);
for (String key : map.keySet()) {
body.addFormDataPart(key,map.get(key));
}
Request request = new Request.Builder()
.url(url)
.post(body.build())
.build();
mOkHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
if (callBack!=null)
callBack.onFailure("fail,msg:"+(e!=null?e.getMessage():"null"));
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (callBack!=null)
callBack.onSuccess(response.body().string());
}
});
}
6 .最后。
我觉得呢,Okhttp还是挺好用的,对于我这种Java流派,Okhttp还能在Java平台上跑呢,
像是Volley,只能用于Android上,伤心。
小弟不才,希望各位不要扔鞋,提意见就好。
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