使用OKHttp3 get请求 , post请求 , 多文件上传 , 包看包会

1 首先需要创建一个OKHttpClient 

可以直接new一个  

 OkHttpClient client = new OkHttpClient()

更多的是用builder构造一个 (那个addInterceptor方法是添加拦截器 , 可以不写,具体的baidu, bing, sogou)

 private void buildHttpClient(){
         this.client = new OkHttpClient.Builder()
                 .addInterceptor(new Interceptor() {
                     public Response intercept(Chain chain) throws IOException {
                         Request request = chain.request();
                         Response response = chain.proceed(request);
                         return response;
                     }
                 })
                 .connectTimeout(4000, TimeUnit.MILLISECONDS)
                 .readTimeout(4000,TimeUnit.MILLISECONDS)
                 .writeTimeout(4000, TimeUnit.MILLISECONDS)
                 .build();
 }

2 GET 请求

     private void get(){
         /* 如果需要参数 , 在url后边拼接 :  ?a=aaa&b=bbb..... */
         Request request = new Request.Builder().url("http://192.168.10.117:8080/test").build();
         client.newCall(request).enqueue(new Callback() {
             public void onResponse(Call call, final Response response) throws IOException {
                 final String result = response.body().string();
                 final boolean ok = response.isSuccessful();
                 runOnUiThread(new Runnable() {
                     public void run(){
                         Toast.makeText(OKHttpActivity.this, result, Toast.LENGTH_SHORT).show();
                     }
                 });
             }
             public void onFailure(Call call, IOException e) {
                 runOnUiThread(new Runnable() {
                     public void run() {
                         Toast.makeText(OKHttpActivity.this, "error", Toast.LENGTH_SHORT).show();
                     }
                 });
             }
         });
     }

3 POST 请求

 private void post(){
     FormBody.Builder builder = new FormBody.Builder();
     /* 添加两个参数 */
     builder.add("p","我勒个去").add("a","hello");
     FormBody body = builder.build();
     Request request = new Request.Builder().url("http://192.168.10.117:8080/test").post(body).build();

     /* 下边和get一样了 */
     client.newCall(request).enqueue(new Callback() {
         public void onResponse(Call call, Response response) throws IOException {
             final  String bodyStr = response.body().string();
             final boolean ok = response.isSuccessful();
             runOnUiThread(new Runnable() {
                 public void run() {
                     if(ok){
                         Toast.makeText(OKHttpActivity.this, bodyStr, Toast.LENGTH_SHORT).show();
                     }else{
                         Toast.makeText(OKHttpActivity.this, "server error : " + bodyStr, Toast.LENGTH_SHORT).show();
                     }
                 }
             });
         }
         public void onFailure(Call call,final IOException e) {
             runOnUiThread(new Runnable() {
                 public void run() {
                     Toast.makeText(OKHttpActivity.this, "error : "+e.toString(), Toast.LENGTH_SHORT).show();
                 }
             });
         }
     });
 }

4 多文件上传

private void upFile(){
    /* 第一个要上传的file */
    File file1 = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/a.jpg");
    RequestBody fileBody1 = RequestBody.create(MediaType.parse("application/octet-stream") , file1);
    String file1Name = "testFile1.txt";

    /* 第二个要上传的文件,这里偷懒了,和file1用的一个图片 */
    File file2 = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/a.jpg");
    RequestBody fileBody2 = RequestBody.create(MediaType.parse("application/octet-stream") , file2);
    String file2Name = "testFile2.txt";


    /* form的分割线,自己定义 */
    String boundary = "xx--------------------------------------------------------------xx";

    MultipartBody mBody = new MultipartBody.Builder(boundary).setType(MultipartBody.FORM)
            /* 上传一个普通的String参数 , key 叫 "p" */
            .addFormDataPart("p" , "你大爷666")
            /* 底下是上传了两个文件 */
            .addFormDataPart("file" , file1Name , fileBody1)
            .addFormDataPart("file" , file2Name , fileBody2)
            .build();

    /* 下边的就和post一样了 */
    Request request = new Request.Builder().url("http://192.168.10.117:8080/test").post(mBody).build();
    client.newCall(request).enqueue(new Callback() {
        public void onResponse(Call call, Response response) throws IOException {
            final  String bodyStr = response.body().string();
            final boolean ok = response.isSuccessful();
            runOnUiThread(new Runnable() {
                public void run() {
                    if(ok){
                        Toast.makeText(OKHttpActivity.this, bodyStr, Toast.LENGTH_SHORT).show();
                    }else{
                        Toast.makeText(OKHttpActivity.this, "server error : " + bodyStr, Toast.LENGTH_SHORT).show();
                    }
                }
            });
        }
        public void onFailure(Call call, final IOException e) {
            runOnUiThread(new Runnable() {
                public void run() {
                    Toast.makeText(OKHttpActivity.this, e.toString(), Toast.LENGTH_SHORT).show();
                }
            });
        }
    });
}