OKhttp的使用

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1.初始化方式

   //1.创建一个OKHttpClient实例        //老版本创建OkHttpClient的方式        client = new OkHttpClient.Builder()                .connectTimeout(5, TimeUnit.SECONDS)                .readTimeout(10, TimeUnit.SECONDS)                .build();

2.同步请求

    public void btnClick(View view) {        //2.创建一个请求        final Request request = new Request.Builder()                //设置请求地址                .url("http://www.baidu.com")                //设置请求方式为Get请求，默认即此                .get()                .build();        Runnable runnable = new Runnable() {            public void run() {                //3.发起网络请求                Call call = client.newCall(request);                try {                    //发起同步网络请求                    Response response = call.execute();                    String result = response.body().string();                    Log.d("google_lenve_fb", "btnClick: " + result);                } catch (IOException e) {                    e.printStackTrace();                }            }        };        new Thread(runnable).start();    }

3.异步请求

  public void btnClick2(View view) {        Request request = new Request.Builder()                //如果使用自带的模拟器10.0.2.2                .url("http://10.3.134.6:8080/sz1605/OKHttpTest?username=张三&password=123456")                .build();        Call call = client.newCall(request);        //发起异步网络请求        call.enqueue(new Callback() {            //请求失败时的回调方法            @Override            public void onFailure(Call call, IOException e) {            }            //请求成功时的回调            @Override            public void onResponse(Call call, Response response) throws IOException {                //如果请求成功                if (response.isSuccessful()) {                    //response.body().string()获取请求的字符串                    Log.d("google_lenve_fb", "onResponse: " + response.body());                    //获取头信息                    Headers headers = response.headers();                    Set<String> names = headers.names();                    Iterator<String> iterator = names.iterator();                    while (iterator.hasNext()) {                        String name = iterator.next();                        Log.d("google_lenve_fb", "onResponse: name:" + name + ";value:" + headers.get(name));                    }                }            }        });    }

3.表单请求

   public void btnClick3(View view) {        //通过表单来传递参数        FormBody formbody = new FormBody.Builder()                .add("password", "66666")                .add("username", "李四").build();        Request request = new Request.Builder()                .post(formbody)                .url("http://10.3.134.6:8080/sz1605/OKHttpTest").build();        Call call = client.newCall(request);        call.enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {            }            @Override            public void onResponse(Call call, Response response) throws IOException {                Log.d("google_lenve_fb", "onResponse: 请求成功！");            }        });    }

4.传送数据

 public void btnClick4(View view) {        //通过流的方式传递参数        JSONObject jsonStr = new JSONObject();        try {            jsonStr.put("username", "王五");            jsonStr.put("password", "333333");        } catch (JSONException e) {            e.printStackTrace();        }        MediaType jsonMediaType = MediaType.parse("application/json;charset=utf-8");        RequestBody jsonBody = RequestBody.create(jsonMediaType,jsonStr.toString());        Request request = new Request.Builder()                .post(jsonBody)                .url("http://10.3.134.6:8080/sz1605/OKHttpTest").build();        client.newCall(request).enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {            }            @Override            public void onResponse(Call call, Response response) throws IOException {            }        });    }

5.传送文件

    public void pushImage(View view) {        MediaType fileMediaType = MediaType.parse("application/octet-stream");        File imageFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "p2.png");        RequestBody fileBody = RequestBody.create(fileMediaType, imageFile);        Request request = new Request.Builder()                .post(fileBody)                .url("http://10.3.134.6:8080/sz1605/OKHttpTest").build();        client.newCall(request).enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {            }            @Override            public void onResponse(Call call, Response response) throws IOException {                Log.d("google_lenve_fb", "onResponse: 文件上传成功！");            }        });    }

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