ich diesen Fehler haben: Verfahren ein Verfahren von einem Supertyp nicht außer Kraft setzen oderFehler: Methode überschreiben oder eine Methode nicht von einem Supertyp implementieren onCreateView
implementierenMein Code:
public class MainActivity erstreckt Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
final ListView list = (ListView) rootView.findViewById(android.R.id.list);
final List<Map<String, Object>> contacts = retrieveContacts(getActivity().getContentResolver());
if (contacts != null)
{
final SimpleAdapter adapter = new SimpleAdapter(getActivity(), contacts, R.layout.activity_main, new String[] { "name", "photo" }, new int[] { R.id.name, R.id.photo });
adapter.setViewBinder(new SimpleAdapter.ViewBinder()
{
@Override
public boolean setViewValue(View view, Object data, String textRepresentation)
{
if ((view instanceof ImageView) & (data instanceof Bitmap))
{
final ImageView image = (ImageView) view;
final Bitmap photo = (Bitmap) data;
image.setImageBitmap(photo);
return true;
}
return false;
}
});
list.setAdapter(adapter);
}
return rootView;
}
private Bitmap getPhoto(ContentResolver contentResolver, long contactId)
{
Bitmap photo = null;
final Uri contactUri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, contactId);
final Uri photoUri = Uri.withAppendedPath(contactUri, ContactsContract.Contacts.Photo.CONTENT_DIRECTORY);
final Cursor cursor = contentResolver.query(photoUri, new String[] { ContactsContract.Contacts.Photo.DATA15 }, null, null, null);
if (cursor == null)
{
Log.e("getPhoto", "Cannot retrieve the photo of the contact with id '" + contactId + "'");
return null;
}
if (cursor.moveToFirst() == true)
{
final byte[] data = cursor.getBlob(0);
if (data != null)
{
photo = BitmapFactory.decodeStream(new ByteArrayInputStream(data));
}
}
if (cursor.isClosed() == false)
{
cursor.close();
}
return photo;
}
private List<Map<String, Object>> retrieveContacts(ContentResolver contentResolver)
{
final List<Map<String, Object>> contacts = new ArrayList<Map<String, Object>>();
final Cursor cursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI, new String[] { ContactsContract.Data.DISPLAY_NAME,
ContactsContract.Data._ID, ContactsContract.Contacts.HAS_PHONE_NUMBER }, null, null, null);
if (cursor == null)
{
Log.e("retrieveContacts", "Cannot retrieve the contacts");
return null;
}
if (cursor.moveToFirst() == true)
{
do
{
final long id = Long.parseLong(cursor.getString(cursor.getColumnIndex(ContactsContract.Data._ID)));
final String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
final int hasPhoneNumber = cursor.getInt(cursor.getColumnIndex(ContactsContract.Data.HAS_PHONE_NUMBER));
if (hasPhoneNumber > 0)
{
final Bitmap photo = getPhoto(contentResolver, id);
final Map<String, Object> contact = new HashMap<String, Object>();
contact.put("name", name);
contact.put("photo", photo);
contacts.add(contact);
}
}
while (cursor.moveToNext() == true);
}
if (cursor.isClosed() == false)
{
cursor.close();
}
return contacts;
}
}
Logcat:
06-06 12: 04: 42.579 3924-3924/net.lelandaislaposte.steven.contact E/AndroidRuntime: FATALE AUSNAHME: Haupt Prozess: net.lelandaislaposte.steven.contact, PID: 3924 java.lang.RuntimeException: Unable zu instanziieren Aktivität ComponentInfo {net.lelandaislaposte.steven.contact/net.lelandaislaposte.steven.contact.MainActivity}: java.lang.ClassCastException: net.lelandaislaposte.steven.contact.MainActivity kann nicht in android.app.Activity um umgewandelt werden android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2327) bei android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2476) bei android.app.ActivityThread.-wrap11 (ActivityThread.java) bei Android .app.ActivityThread $ H.handleMessage (ActivityThread.java:1344) bei android.os.Handler.dispatchMessage (Handler.java:102) bei android.os.Looper.loop (Looper.java:148) bei Android .app.ActivityThread.main (ActivityThread.java:5417) bei java.lang.reflect.Method.invoke (systemeigene Methode) bei com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:726) bei com.android.internal.os.ZygoteInit.main (ZygoteInit.java:616) verursacht durch: java.lang.ClassCastException: net.lelandaislaposte.steven.contact.MainActivity kann nicht in android.app.Activity um umgewandelt werden android.app.Instrumentati on.newActivity (Instrumentation.java:1067) bei android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2317) bei android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2476) bei android.app.ActivityThread. -wrap11 (ActivityThread.java) bei android.app.ActivityThread $ H.handleMessage (ActivityThread.java:1344) bei android.os.Handler.dispatchMessage (Handler.java:102) bei android.os.Looper.loop (Looper.java:148) bei android.app.ActivityThread.main (ActivityThread.java:5417) bei java.lang.reflect.Method.invoke (native Methode) bei com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:726) bei com.android.internal.os.ZygoteInit.main (ZygoteInit.java:616)
Ich weiß nicht, woher kommt das?
Es sollte das Foto und den Namen der Kontakte im Hone gespeichert Rückkehr
Dankten, aber neuer Fehler: Verursacht durch: java.lang.ClassCastException: net.lelandaislaposte.steven.contact.MainActivity nicht gegossen werden können, um android.app.Activity –
@StevenLnds können Sie sagen, in welcher Zeile Sie diesen Fehler – user5894647
@StevenLnds das Logcat sagt, wo die classcastxception aufgetreten ist, wäre es einfach, wenn Sie sagen, wo die Ausnahme aufgetreten ist – user5894647