HttpClient POST在Android设备上不起作用

Question

我尝试通过AsyncHttpClient将我的手机联系人JSON Array发布到服务器。我从设备中获取所有联系人并将其转换为json数组。调试后，我看到在Android设备上没有触发AsyncHttpClient。

以下代码适用于GenyMotion模拟器，但不适用于Android设备

在三星Note 4和A7上测试时，httpclient.post无法执行。帖子在模拟器上工作

public void contactsToServer() throws JSONException, UnsupportedEncodingException {

JSONObject listContacts = new JSONObject();
try {
    lstContacts.put("listContacts", JsonContactsArray); 
} catch (JSONException e) {
    e.printStackTrace();
}
String jsonContacts = listContacts.toString();


AsyncHttpClient httpClient = new AsyncHttpClient(true, 80, 443);
StringEntity entity = new StringEntity(jsonContacts);

httpClient.addHeader("hjtyu34", TOKEN);

httpClient.post(mycontext, URL, entity, "application/json", new JsonHttpResponseHandler() {
    @Override
    public void onSuccess(int statusCode, Header[] headers, JSONArray response) {
        super.onSuccess(statusCode, headers, response);
        System.out.println("onSuccess: " + response.toString());                
    }
    @Override
    public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {
        if (statusCode == 404) {
            Toast.makeText(getActivity().getApplicationContext(), "Requested resource not found", Toast.LENGTH_LONG).show();
        } else if (statusCode == 500) {
            Toast.makeText(getActivity().getApplicationContext(), "Something went wrong at server end", Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(getActivity().getApplicationContext(), "Server Down", Toast.LENGTH_LONG).show();
        }
    }
});
}