Android Okhttp异步调用

要发送异步请求，请使用以下命令：

void doGetRequest(String url) throws IOException{    Request request = new Request.Builder() .url(url) .build();    client.newCall(request) .enqueue(new Callback() {     @Override     public void onFailure(final Call call, IOException e) {         // Error         runonUiThread(new Runnable() {  @Override  public void run() {      // For the example, you can show an error dialog or a toast      // on the main UI thread  }         });     }     @Override     public void onResponse(Call call, final Response response) throws IOException {         String res = response.body().string();         // Do something with the response     } });}

并这样称呼：

case R.id.btLogin:    try {        doGetRequest("http://myurl/api/");    } catch (IOException e) {        e.printStackTrace();    }    break;