Message d'erreur au lancement de l'application

**Arwa89** · 11/03/2013, 22h51

Bonsoir,

Je suis nouvelle développeuse Android et je suis des tutoriaux pour créer ma première application. Quand je lance l'application, le compilateur ne donne aucune erreur mais l'emulateur affiche "Unfortunately, app name HAS stopped."

my LogCat :

Code :

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03-11 20:48:28.558: W/dalvikvm(910): Unable to resolve superclass of Lcom/example/test_serveur/MainActivity; (474) 
03-11 20:48:28.598: W/dalvikvm(910): Link of class 'Lcom/example/test_serveur/MainActivity;' failed 
03-11 20:48:28.619: D/AndroidRuntime(910): Shutting down VM 
03-11 20:48:28.628: W/dalvikvm(910): threadid=1: thread exiting with uncaught exception (group=0x40a71930) 
03-11 20:48:28.708: E/AndroidRuntime(910): FATAL EXCEPTION: main 
03-11 20:48:28.708: E/AndroidRuntime(910): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.test_serveur/com.example.test_serveur.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.example.test_serveur.MainActivity" on path: /data/app/com.example.test_serveur-2.apk 
03-11 20:48:28.708: E/AndroidRuntime(910): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106)
03-11 20:48:28.708: E/AndroidRuntime(910): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
03-11 20:48:28.708: E/AndroidRuntime(910): at android.app.ActivityThread.access$600(ActivityThread.java:141)
03-11 20:48:28.708: E/AndroidRuntime(910): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
03-11 20:48:28.708: E/AndroidRuntime(910): at android.os.Handler.dispatchMessage(Handler.java:99)
03-11 20:48:28.708: E/AndroidRuntime(910): at android.os.Looper.loop(Looper.java:137)
03-11 20:48:28.708: E/AndroidRuntime(910): at android.app.ActivityThread.main(ActivityThread.java:5041)
03-11 20:48:28.708: E/AndroidRuntime(910): at java.lang.reflect.Method.invokeNative(Native Method)
03-11 20:48:28.708: E/AndroidRuntime(910): at java.lang.reflect.Method.invoke(Method.java:511)
03-11 20:48:28.708: E/AndroidRuntime(910): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-11 20:48:28.708: E/AndroidRuntime(910): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-11 20:48:28.708: E/AndroidRuntime(910): at dalvik.system.NativeStart.main(Native Method)
03-11 20:48:28.708: E/AndroidRuntime(910): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.test_serveur.MainActivity" on path: /data/app/com.example.test_serveur-2.apk
03-11 20:48:28.708: E/AndroidRuntime(910): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
03-11 20:48:28.708: E/AndroidRuntime(910): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
03-11 20:48:28.708: E/AndroidRuntime(910): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
03-11 20:48:28.708: E/AndroidRuntime(910): at android.app.Instrumentation.newActivity(Instrumentation.java:1054)
03-11 20:48:28.708: E/AndroidRuntime(910): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
03-11 20:48:28.708: E/AndroidRuntime(910): ... 11 more

AndroidManifest.xml :

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<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.test_serveur" android:versionCode="1" android:versionName="1.0" > 
    <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" >
        <activity android:name="com.example.test_serveur.MainActivity" android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

JsonParser.java :

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[*]package com.example.test_serveur; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.json.JSONException; import org.json.JSONObject; import android.util.Log; public class JsonParser { static InputStream is = null; static JSONObject jObj = null; static String json = ""; // Constructeur de notre classe public JsonParser() { } public JSONObject getJSONFromUrl(String url) { // début de la requête http try { // faire appel à defaultHttpClient DefaultHttpClient httpClient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost(url); HttpResponse httpResponse = httpClient.execute(httpPost); HttpEntity httpEntity = httpResponse.getEntity(); is = httpEntity.getContent(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } try { BufferedReader reader = new BufferedReader(new InputStreamReader( is, "iso-8859-1"), 8); StringBuilder sb = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } is.close(); json = sb.toString(); } catch (Exception e) { Log.e("Buffer Error", "Error converting result " + e.toString()); } // convertir le résultat qui est sous format d'un String en un JSONObject try { jObj = new JSONObject(json); } catch (JSONException e) { Log.e("JSON Parser", "Error parsing data " + e.toString()); } // retourner un JSONObject return jObj; } }

ListItimizedOverlay.java :

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package com.example.test_serveur; import java.util.ArrayList; import android.graphics.drawable.Drawable; import android.app.AlertDialog; import android.content.Context; import com.google.android.maps.ItemizedOverlay; import com.google.android.maps.OverlayItem; public class ListItimizedOverlay extends ItemizedOverlay<OverlayItem> { private Context context; private ArrayList<OverlayItem> arrayListOverlayItem = new ArrayList<OverlayItem>(); public ListItimizedOverlay(Drawable defaultMarker) { super(boundCenterBottom(defaultMarker)); // TODO Auto-generated constructor stub } public ListItimizedOverlay(Drawable defaultMarker, Context pContext) { super(boundCenterBottom(defaultMarker)); this.context = pContext; } @Override protected OverlayItem createItem(int i) { // TODO Auto-generated method stub return arrayListOverlayItem.get(i); } @Override public int size() { // TODO Auto-generated method stub return arrayListOverlayItem.size(); } @Override protected boolean onTap(int index) { OverlayItem item = arrayListOverlayItem.get(index); AlertDialog.Builder dialog = new AlertDialog.Builder(context); dialog.setTitle(item.getTitle()); dialog.setMessage(item.getSnippet()); dialog.show(); return true; } public void addOverlayItem(OverlayItem overlay) { arrayListOverlayItem.add(overlay); populate(); } }

MainActivity.java :

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package com.example.test_serveur; import android.os.Bundle; import java.io.InputStream; import java.util.List; import org.apache.http.HttpEntity; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.graphics.drawable.Drawable; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.AsyncTask; import android.view.KeyEvent; import android.widget.Toast; import com.example.test_serveur.ListItimizedOverlay; import com.example.test_serveur.R; import com.google.android.maps.GeoPoint; import com.google.android.maps.MapActivity; import com.google.android.maps.MapController; import com.google.android.maps.MapView; import com.google.android.maps.MyLocationOverlay; import com.google.android.maps.Overlay; import com.google.android.maps.OverlayItem; public class MainActivity extends MapActivity implements LocationListener { private static String url = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=-33.8670522,151.1957362&radius=500&types=food&name=harbour&sensor=true&key=AIzaSyDxms7wMJorpD9LZVRL9OiozgV1D9wJKxo"; private static final String TAG_results = "results"; private static final String TAG_geometry = "geometry"; private static final String TAG_location = "location"; private static final String TAG_lat = "lat"; private static final String TAG_lng = "lng"; JSONArray contacts = null; private MapView mapView = null; private LocationManager lm = null; private double lat = 0; private double lng = 0; private MapController mc = null; private MyLocationOverlay myLocation = null; HttpEntity httpEntity; static InputStream is = null; static JSONObject jObj = null; static String json = ""; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mapView = (MapView) this.findViewById(R.id.mapView); mapView.setBuiltInZoomControls(true); lm = (LocationManager) this.getSystemService(LOCATION_SERVICE); lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 10000, 0, this); lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 10000, 0, this); mc = mapView.getController(); mc.setZoom(15); myLocation = new MyLocationOverlay(getApplicationContext(), mapView); myLocation.runOnFirstFix(new Runnable() { public void run() { mc.animateTo(myLocation.getMyLocation()); mc.setZoom(17); } }); mapView.getOverlays().add(myLocation); myLocation.enableMyLocation(); getData(); } private void getData() { Drawable drawable = this.getResources().getDrawable(R.drawable.ic_launcher); final ListItimizedOverlay itemizedoverlay = new ListItimizedOverlay(drawable,this); new AsyncTask<Void, Void, JSONObject>(){ @Override protected JSONObject doInBackground(Void... params) { // instancier la classe JsonParser JsonParser jParser = new JsonParser (); // récupérer le JSONObject à partir de l’url du fichier employes.json JSONObject json = jParser.getJSONFromUrl(url); return json; }; protected void onPostExecute(JSONObject json) { try { // récupérer la liste de tous les employés JSONArray results = json.getJSONArray(TAG_results); // parcourir toute la liste des employés for(int i = 0; i < results.length(); i++){ // récupérer un employé de type JSONObject JSONObject emp = results.getJSONObject(i); // récupérer le JSONObject phone qui contient deux items JSONObject geometry = emp.getJSONObject(TAG_geometry); JSONObject location = geometry.getJSONObject(TAG_location); String latitude = location.getString(TAG_lat); String longitude= location.getString(TAG_lng); int b = Integer.parseInt(latitude); int c = Integer.parseInt(longitude); GeoPoint geoPoint = new GeoPoint(c , b); OverlayItem overlayitem = new OverlayItem(geoPoint, "Hello from", "Tahiti"); itemizedoverlay.addOverlayItem(overlayitem); List<Overlay> mapOverlays = mapView.getOverlays(); mapOverlays.add(itemizedoverlay); } } catch(JSONException e) { e.printStackTrace(); } }; }.execute(); } @Override protected void onResume() { super.onResume(); myLocation.enableMyLocation(); myLocation.enableCompass(); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_S) { mapView.setSatellite(!mapView.isSatellite()); return true; } return super.onKeyDown(keyCode, event); } @Override public void onLocationChanged(Location location) { lat = location.getLatitude(); lng = location.getLongitude(); Toast.makeText( getBaseContext(), "Location change to : Latitude = " + lat + " Longitude = " + lng, Toast.LENGTH_SHORT).show(); GeoPoint p = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6)); mc.animateTo(p); mc.setCenter(p); } @Override public void onProviderDisabled(String arg0) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String arg0) { // TODO Auto-generated method stub } @Override public void onStatusChanged(String arg0, int arg1, Bundle arg2) { // TODO Auto-generated method stub } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } }

activity_main.xml

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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" >
<com.google.android.maps.MapView android:id="@+id/mapView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:apiKey="@string/mapKey" android:clickable="true" /> 
</RelativeLayout>

Avez vous des idées ? Merci d'avance.

**Minicalion** · 12/03/2013, 12h43

Bonjour Arwa89,

D'apère le logcat, il n'arrive pas à résoudre la super classe de MainActivity, qui est MapActivity.

Or MapActivity ne fait pas partie de la librairie standard android, si tu veut hériter de MapActivity du package com.google.android.maps, tu doit ajouter dans ton android manifest ceci:

<uses-library android:name="com.google.android.maps" />

Et normalement ça devrait fonctionner

, enfin j'espère

**Arwa89** · 13/03/2013, 03h40

Bonjour Minicalion,
l'erreur a été corrigée et merci beaucoup de votre aide.

Message d'erreur au lancement de l'application

Android

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