public class OkHttpUtil { //靜態本類對象 private static OkHttpUtil okHttpUtil; private OkHttpClient okHttpClient; //私有化構造方法 private OkHttpUtil() { okHttpClient = new OkHttpClient.Builder().build(); } //公共的供外部訪問的方法 public static OkHttpUtil getInstance() { if (okHttpUtil == null) { synchronized (OkHttpUtil.class) { if (okHttpUtil == null) { okHttpUtil = new OkHttpUtil(); } } } return okHttpUtil; } public void get(String url, Map<String, String> map, final NetworkCallback networkCallback) { if (map != null && map.size() > 0) { StringBuffer sb = new StringBuffer(url); sb.append("?"); Set<String> set = map.keySet(); for (String str : set) { sb.append(str).append("=").append(map.get(str)).append("&"); } url = sb.substring(0, sb.length() - 1); } Request request = new Request.Builder().url(url).build(); okHttpClient.newCall(request).enqueue(new Callback() { @Override public void onFailure(Call call, IOException e) { networkCallback.error(e.getMessage()); } @Override public void onResponse(Call call, Response response) throws IOException { String string = response.body().string(); networkCallback.successful(string); } }); } public void post(String url, JSONObject json, final NetworkCallback networkCallback) { // RequestBody body = new FormBody.Builder().build(); MediaType JSON = MediaType.parse("text/x-markdown; charset=utf-8"); RequestBody body = RequestBody.create(JSON, json.toString()); Request request = new Request.Builder().url(url).method("POST", body).build(); okHttpClient.newCall(request).enqueue(new Callback() { @Override public void onFailure(Call call, IOException e) { networkCallback.error(e.getMessage()); } @Override public void onResponse(Call call, Response response) throws IOException { String string = response.body().string(); networkCallback.successful(string); } }); } }