Volley - Ne Peut Pas Résoudre Constructeur "JSONObjectRequest

J'ai ce problème lorsque je suis

http://www.androidhive.info/2014/08/android-building-free-wallpapers-app-part-2/

et en sont venus au point où j'ai ajouter un écran de démarrage et suis en train de créer le Volley Demande.

Le code du tutoriel explique à utiliser lors de la prise de la JSONObjectRequest est

JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET, url, null, new Response.Listener<JSONObject>()

mais quand je tape qu'il me demande d'importation de Volley de la bibliothèque, ce qui modifie à

JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>()

Faire ceci affiche l'erreur ne peut pas résoudre le constructeur.

Le code que j'ai dans mon SplashActivity.java est:

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Window;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class SplashActivity extends Activity {
private static final String TAG = SplashActivity.class.getSimpleName();
private static final String TAG_FEED = "feed", TAG_ENTRY = "entry",
TAG_GPHOTO_ID = "gphoto$id", TAG_T = "$t",
TAG_ALBUM_TITLE = "title";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
getActionBar().hide();
setContentView(R.layout.activity_splash);
//Picasa request to get list of albums
String url = AppConst.URL_PICASA_ALBUMS
.replace("_PICASA_USER_", AppController.getInstance()
.getPrefManager().getGoogleUserName());
Log.d(TAG, "Albums request url: " + url);
//Preparing volley's json object request
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET, url,
null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d(TAG, "Albums Response: " + response.toString());
List<Category> albums = new ArrayList<Category>();
try {
//Parsing the json response
JSONArray entry = response.getJSONObject(TAG_FEED)
.getJSONArray(TAG_ENTRY);
//loop through albums nodes and add them to album
//list
for (int i = 0; i < entry.length(); i++) {
JSONObject albumObj = (JSONObject) entry.get(i);
//album id
String albumId = albumObj.getJSONObject(
TAG_GPHOTO_ID).getString(TAG_T);
//album title
String albumTitle = albumObj.getJSONObject(
TAG_ALBUM_TITLE).getString(TAG_T);
Category album = new Category();
album.setId(albumId);
album.setTitle(albumTitle);
//add album to list
albums.add(album);
Log.d(TAG, "Album Id: " + albumId
+ ", Album Title: " + albumTitle);
}
//Store albums in shared pref
AppController.getInstance().getPrefManager()
.storeCategories(albums);
//String the main activity
Intent intent = new Intent(getApplicationContext(),
MainActivity.class);
startActivity(intent);
//closing spalsh activity
finish();
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
getString(R.string.msg_unknown_error),
Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Volley Error: " + error.getMessage());
//show error toast
Toast.makeText(getApplicationContext(),
getString(R.string.splash_error),
Toast.LENGTH_LONG).show();
//Unable to fetch albums
//check for existing Albums data in Shared Preferences
if (AppController.getInstance().getPrefManager()
.getCategories() != null && AppController.getInstance().getPrefManager()
.getCategories().size() > 0) {
//String the main activity
Intent intent = new Intent(getApplicationContext(),
MainActivity.class);
startActivity(intent);
//closing spalsh activity
finish();
} else {
//Albums data not present in the shared preferences
//Launch settings activity, so that user can modify
//the settings
Intent i = new Intent(SplashActivity.this,
SettingsActivity.class);
//clear all the activities
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(i);
}
}
});
//disable the cache for this request, so that it always fetches updated
//json
jsonObjReq.setShouldCache(false);
//Making the request
AppController.getInstance().addToRequestQueue(jsonObjReq);
}
}

Je ne sais pas quoi faire pour résoudre ce problème?

OriginalL'auteur x10sion | 2015-07-20