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Ich versuche AsyncTask zu benutzen, wenn das Gerät eine Internetverbindung hat, aber wenn ich das öffne, ohne Internet erscheint diese Meldung "Leider gestoppt", folge dem Code, was mache ich falsch? Kann mir jemand erklären?AsyncTask Test Verbindung
PS: Ich habe eine Aktivität und ich arbeite mit AsyncTask in einem Fragment.
Fragment, das AsyncTask verwendet.
public class MasonFragment extends Fragment {
private ListView lstMason;
private ProgressDialog dialog;
//private Fragment fragmentMain = new MainFragment();
public MasonFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_mason, container, false);
lstMason = (ListView)view.findViewById(R.id.lstMason);
// Create default options which will be used for every
// displayImage(...) call if no options will be passed to this method
DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder().cacheInMemory(true).cacheOnDisk(true).build();
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getActivity())
.defaultDisplayImageOptions(defaultOptions).build();
ImageLoader.getInstance().init(config); // Do it on Application start
//To that class work need this: compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5' in gradle module
new JSONTask().execute("https://deliveryteste.000webhostapp.com/production_version_1/json_services_v1.txt");
return view;
}
/*private View.OnClickListener requestJSON = new View.OnClickListener() {
@Override
public void onClick(View v) {
new JSONTask().execute("My_URL");
}
};*/
public class JSONTask extends AsyncTask<String, String, List<Services>> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected List<Services> doInBackground(String... params) {
if(new CheckNetwork(getActivity()).isNetworkAvailable()) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuffer buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
String finalJson = buffer.toString();
JSONObject jsonObject = new JSONObject(finalJson);
JSONArray jsonArray = jsonObject.getJSONArray("mason");
List<Services> servicesList = new ArrayList<>();
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject finalObject = jsonArray.getJSONObject(i);
Services services = new Services();
services.setName(finalObject.getString("name"));
services.setTelephone(finalObject.getString("telephone"));
services.setCity(finalObject.getString("city"));
services.setDescription(finalObject.getString("description"));
services.setRating((float) finalObject.getDouble("rate"));
services.setImage(finalObject.getString("image"));
services.setFacebook(finalObject.getString("facebook"));
servicesList.add(services);
}
return servicesList;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
//backToMain();
} finally {
if (connection != null) {
connection.disconnect();
}
try {
if (reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
} else {
Toast.makeText(getActivity(), "Por favor esteja conectado com a rede!", Toast.LENGTH_LONG).show();
}
return null;
}
@Override
protected void onPostExecute(List<Services> result) {
super.onPostExecute(result);
ServicesAdapter servicesAdapter = new ServicesAdapter(getActivity(), R.layout.custom_listview, result);
lstMason.setAdapter(servicesAdapter);
}
}
//Class to CustomArrayAdapter
public class ServicesAdapter extends ArrayAdapter {
private List<Services> servicesList;
private int resource;
private LayoutInflater inflater;
public ServicesAdapter(Context context, int resource, List<Services> objects) {
super(context, resource, objects);
servicesList = objects;
this.resource = resource;
inflater = (LayoutInflater) getActivity().getSystemService(LAYOUT_INFLATER_SERVICE);
}
@NonNull
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null){
convertView = inflater.inflate(resource, null);
}
ImageView imgPerson;
TextView lblName;
TextView lblTelephone;
TextView lblDescription;
TextView lblFacebookResult;
TextView lblCity;
RatingBar rtgServiceRating;
imgPerson = (ImageView)convertView.findViewById(R.id.imgPerson);
lblName = (TextView)convertView.findViewById(R.id.lblName);
lblTelephone = (TextView)convertView.findViewById(R.id.lblTelephone);
lblCity = (TextView)convertView.findViewById(R.id.lblCity);
lblDescription = (TextView)convertView.findViewById(R.id.lblDescription);
lblFacebookResult = (TextView)convertView.findViewById(R.id.lblFacebookResult);
rtgServiceRating = (RatingBar)convertView.findViewById(R.id.rtgSerciveRating);
// Then later, when you want to display image
ImageLoader.getInstance().displayImage(servicesList.get(position).getImage(), imgPerson); // Default options will be used
lblName.setText(servicesList.get(position).getName());
lblTelephone.setText(String.valueOf(servicesList.get(position).getTelephone()));
lblDescription.setText(servicesList.get(position).getDescription());
lblFacebookResult.setText(servicesList.get(position).getFacebook());
lblCity.setText(servicesList.get(position).getCity());
//Rating Bar
rtgServiceRating.setRating(servicesList.get(position).getRating());
StringBuffer stringBuffer = new StringBuffer();
return convertView;
}
}
/*private void backToMain(){
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.lnlContentMain, fragmentMain).commit();
}*/
Class-Netzwerkverbindung überprüfen:
public class CheckNetwork {
private Context context;
public CheckNetwork(Context context) {
this.context = context;
}
public boolean isNetworkAvailable() {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
Protokollfehler:
01-30 17:30:13.886 6868-7284/com.archtech.gabrielgomes.hirehere E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
Process: com.archtech.gabrielgomes.hirehere, PID: 6868
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
Caused by: java.lang.SecurityException: ConnectivityService: Neither user 10204 nor current process has android.permission.ACCESS_NETWORK_STATE.
at android.os.Parcel.readException(Parcel.java:1472)
at android.os.Parcel.readException(Parcel.java:1426)
at android.net.IConnectivityManager$Stub$Proxy.getActiveNetworkInfo(IConnectivityManager.java:1139)
at android.net.ConnectivityManager.getActiveNetworkInfo(ConnectivityManager.java:690)
at com.archtech.gabrielgomes.hirehere.CheckNetwork.isNetworkAvailable(CheckNetwork.java:21)
at com.archtech.gabrielgomes.hirehere.fragments.MasonFragment$JSONTask.doInBackground(MasonFragment.java:100)
at com.archtech.gabrielgomes.hirehere.fragments.MasonFragment$JSONTask.doInBackground(MasonFragment.java:90)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
Danke Jungs.
Mögliche Duplikat [weder Anwender noch laufenden Prozess hat android.permission.ACCESS \ _COARSE \ _Ort] (http: //stackoverflow.com/questions/26312733/neither-user-nor-current-process-has-android-permission-access-coar-location) – petey
Überprüfen Sie die Berechtigung in der Manifestdatei. –