//发送请求获取json文件

    private void sendRequestByOkHttp() {

        new Thread(new Runnable() {

            @Override

            public void run() {

                try {

                    OkHttpClient client = new OkHttpClient();

                    Request request = new Request.Builder()

                            .url("http://10.0.2.2:88/data2.json")   //我是在本地搭建了一个服务器，date2.json

                            .build();

                    Response response = client.newCall(request).execute();

                    String responseData = response.body().string();

                    parseJSONObject(responseData);

                } catch (Exception e) {

                    e.printStackTrace();

                }

            }

        }).start();

    }

    private void parseJSONObject(String json) {

        try {

            JSONArray jsonArray = new JSONArray(json);

            for (int i = 0; i < jsonArray.length(); i++) {

                JSONObject jsonObject = jsonArray.getJSONObject(i);

                String id = jsonObject.getString("id");

                String name = jsonObject.getString("name");

                Log.d("MainActivity", "name是" + name);

                Log.d("MainActivity", "id是" + id);

            }

        } catch (JSONException e) {

            e.printStackTrace();

        }

    }