Question

我正在开发一个简单的Android应用程序，需要获取并将数据发布到自行开发的web api。起初我让它像魅力一样工作，但在重新启动和更新我的iMac后，结果发现该应用程序不再像以前那样有效了。

在Android Studio中返回以下错误：java.net.UnknownHostException：无法解析主机＆＃34; sensor.creatiefingewikkeld.com＆＃34;：没有与主机名关联的地址

这是我的SensorRestClient api类：

public class SensorRestClient {
    private static final String BASE_URL = "http://sensor.creatiefingewikkeld.com/";

    private static AsyncHttpClient client = new AsyncHttpClient();

    public static void get(Context context, String url, Header[] headers, RequestParams params,
                           AsyncHttpResponseHandler responseHandler) {
        Log.i("tester inside get",getAbsoluteUrl(url));
        client.get(context, getAbsoluteUrl(url), headers, params, responseHandler);
    }

    public static void post(Context context, String url, RequestParams params,
                            AsyncHttpResponseHandler responseHandler){
        client.post(getAbsoluteUrl(url), params, responseHandler);
    }

    private static String getAbsoluteUrl(String relativeUrl) {
        return BASE_URL + relativeUrl;
    }
}

这是我的MainActivity类：

public class MainActivity extends AppCompatActivity {

    private ListView dataList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getData();
        //postData();
    }
    private void getData() {
        List<Header> headers = new ArrayList<Header>();
        headers.add(new BasicHeader("Accept", "application/json"));

        SensorRestClient.get(MainActivity.this, "api/get", headers.toArray(new Header[headers.size()]),
                null, new JsonHttpResponseHandler() {
                    @Override
                    public void onSuccess(int statusCode, Header[] headers, JSONArray response) {

                        ArrayList<SensorData> dataArray = new ArrayList<SensorData>();
                        SensorDataAdapter dataAdapter = new SensorDataAdapter(MainActivity.this, dataArray);
                        Log.i("e","e");
                        for (int i = 0; i < response.length(); i++) {
                            try {
                                dataAdapter.add(new SensorData(response.getJSONObject(i)));
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }

                        dataList = (ListView) findViewById(R.id.list_notes);
                        dataList.setAdapter(dataAdapter);
                    }
                    @Override
                    public void onFailure(int statusCode, Header[] headers, String res, Throwable t) {
                        Log.i("StatusCode:" , String.valueOf(statusCode)    );
                    }
                });
    }

    private void postData(){
        RequestParams params = new RequestParams();
        params.put("kind", "Temperature");
        params.put("title", "Test from android");
        params.put("data", "28");

        SensorRestClient.post(MainActivity.this, "api/post", params,
                new JsonHttpResponseHandler() {
                    @Override
                    public void onSuccess(int statusCode, Header[] headers, JSONArray response) {
                        Log.i("Status-Posted: ", String.valueOf(statusCode));
                    }
                }
        );
    }

}

我也在使用listView的适配器，但我认为现在不需要代码。

我希望有人可以帮我解决这个问题，因为。

Answer 1

在浏览器中检查URI后，我很确定您只是遇到了（临时？）dns故障情况。你能否确认错误没有消失？

Android应用：asynchttpclient unknownhostexception

1 个答案: