Java 2基本获取示例代码

我是Android新手，正在尝试在github上使用带有基本SimpleService.java的改型2。这个示例运行得很好，但是当使用myURL时，我得到了一个

NullPointerException

：

Thread thread = new Thread(new Runnable(){
            @Override
            public void run(){
            Retrofit retrofit = new Retrofit.Builder()
                    .baseUrl(myURL)
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();

            // Create an instance of our GitHub API interface.
            SimpleService.GitHub github = retrofit.create(SimpleService.GitHub.class);

            // Create a call instance for looking up Retrofit contributors.
            Call<List<SimpleService.Pending>> call2 = github.getPendings();
            List<SimpleService.Pending> pendings = null;
            try {
                pendings = call2.execute().body();
            } catch (IOException e) {
                e.printStackTrace();
            }
            for (SimpleService.Pending pending : pendings) {
                System.out.println(pending.idpr + " ;;; " + pending.lastlat + " ;;; " + pending.lastlng);
            }


        }
    });
    thread.start();

下面是我收到的典型json：

[
{"idpr":1,"lastlat":48.788986,"lastlng":7.24545,"idu":{"username":"foulekparo"}},
{"idpr":2,"lastlat":48.803717,"lastlng":6.47526,"idu":{"username":"flouka"}}
]

---

我不知道我做错了什么。

你的myURL的值是多少？这是myURL：你的myURL的值是多少？这是myURL：

[
{"idpr":1,"lastlat":48.788986,"lastlng":7.24545,"idu":{"username":"foulekparo"}},
{"idpr":2,"lastlat":48.803717,"lastlng":6.47526,"idu":{"username":"flouka"}}
]