Ich benutze eineSimpleCursorAdapter und einListView um einige mit einem Loader geladene Daten anzuzeigen. In dercursor Ich habe Artikel mit einemint das geht von 0 bis 3.

Ich möchte, dass die Elemente mit diesem Int gleich 0-1 ein Layout haben (rechtsbündig, eine Farbe) und Elemente mit 2-3 ein anderes Layout haben (linksbündig, eine andere Farbe).much like a chat app, where sent messages are on the right and received ones are on the left.

Gibt es eine einfache Möglichkeit, dies zu tun? So etwas wie ein Schalter, bei dem ich mit 0-1 Layout_1 und 2-3 Layout_2 aufblase.

BEARBEITEN: Ich habe den Code des ListFragments hinzugefügt, das ich auffüllen möchte. Der als Schalter zu verwendende int ist MyContentProvider.Data.E_TYPE. Ich kann es nicht verstehen, aber vielleicht kann mir jemand klar erklären, was ich zu schreiben habe!

   import com.actionbarsherlock.view.Menu;
   import com.actionbarsherlock.view.MenuInflater;
   import com.corsalini.survcontr.MyContentProvider.Data;

   import android.content.ContentResolver;
   import android.content.ContentValues;
   import android.database.Cursor;
   import android.os.Bundle;
   import android.support.v4.app.ListFragment;
   import android.support.v4.content.CursorLoader;
   import android.support.v4.app.LoaderManager;
   import android.support.v4.content.Loader;
   import android.support.v4.widget.CursorAdapter;
   import android.support.v4.widget.SimpleCursorAdapter;
   import android.util.Log;
   import android.view.View;
   import android.widget.ListView;



  public class FragEvents extends ListFragment implements  LoaderManager.LoaderCallbacks<Cursor>{
@Override
public void onPause() {
    allRead();
    super.onPause();

}

private static final int EVENTS_LOADER = 0x02;

// This is the Adapter being used to display the list's data.
SimpleCursorAdapter mAdapter;

// If non-null, this is the current filter the user has provided.
String mCurFilter;

@Override public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    // Give some text to display if there is no data.  In a real
    // application this would come from a resource.
    setEmptyText(this.getString(R.string.perform_event)); 

    // We have a menu item to show in action bar.
    setHasOptionsMenu(true);

    // Create an empty adapter we will use to display the loaded data.
    mAdapter = new SimpleCursorAdapter(getActivity(),
            android.R.layout.simple_list_item_2, null,
            new String[] { MyContentProvider.Data.E_TEXT, MyContentProvider.Data.E_DATE, 
        MyContentProvider.Data.E_NUMBER, MyContentProvider.Data.E_TYPE  },
        new int[] { android.R.id.text1, android.R.id.text2 },
        CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
    setListAdapter(mAdapter);

    // Start out with a progress indicator.
    setListShown(false);

    // Prepare the loader.  Either re-connect with an existing one,
    // or start a new one.
    getActivity().getSupportLoaderManager().initLoader(EVENTS_LOADER, null, this);


}

public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
     inflater.inflate(R.menu.menu_events, menu);  
}



@Override public void onListItemClick(ListView l, View v, int position, long id) {
    //TODO Insert desired behavior here.
    Log.i("FragmentComplexList", "Item clicked: " + id);
}

// These are the Contacts rows that we will retrieve.
static final String[] SUMMARY_PROJECTION = new String[] {
    MyContentProvider.Data.E_ID,
    MyContentProvider.Data.E_DATE,
    MyContentProvider.Data.E_NUMBER,
    MyContentProvider.Data.E_TEXT,
    MyContentProvider.Data.E_TYPE,

};

public Loader<Cursor> onCreateLoader(int id, Bundle args) {


    return new CursorLoader(getActivity(),  MyContentProvider.Data.CONTENT_URI_EVENTS,
            SUMMARY_PROJECTION, null, null,
            Data.E_ID + " DESC");
}

public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
    // Swap the new cursor in.  (The framework will take care of closing the
    // old cursor once we return.)
    mAdapter.swapCursor(data);

    // The list should now be shown.
    if (isResumed()) {
        setListShown(true);
    } else {
        setListShownNoAnimation(true);
    }
}

public void onLoaderReset(Loader<Cursor> loader) {
    // This is called when the last Cursor provided to onLoadFinished()
    // above is about to be closed.  We need to make sure we are no
    // longer using it.
    mAdapter.swapCursor(null);
}

public void deleteEvent(ContentResolver contentResolver,
        long id){
    String selection = Data.E_ID + "=";
    String[] args = {String.valueOf(id)};
    contentResolver.delete(Data.CONTENT_URI_EVENTS, selection, args);
}

public void allRead(){
    ContentResolver contentResolver = getActivity().getContentResolver();
    ContentValues contentValue = new ContentValues();
    contentValue.put(Data.E_NUMBER, Data.RECEIVED_READ);
    String selection= Data.E_TYPE+"=";
    String[] args= {String.valueOf(Data.RECEIVED_UNREAD)};
    contentResolver.update(Data.CONTENT_URI_EVENTS, contentValue, selection, args);
}



   }

BEARBEITEN: Wenn ich es richtig verstanden habe, sollte mein letzter EventsAdapter (der SimpleCursorAdapter erweitert) so aussehen:

    import android.content.Context;
    import android.database.Cursor;
    import android.support.v4.widget.SimpleCursorAdapter;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.TextView;

    public class EventsAdapter extends SimpleCursorAdapter {

private Context localContext;

public EventsAdapter(Context context, int layout, Cursor c, String[] from,
        int[] to, int flags) {
    super(context, layout, c, from, to, flags);

    localContext = context;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    Cursor c= getCursor();
    c.moveToPosition(position);
    if(convertView == null)
    {
        LayoutInflater layoutInflator = (LayoutInflater)localContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        switch (getItemViewType(position)){
        case 0:
            convertView = layoutInflator.inflate(R.layout.item_event_0, null);
            break;
        case 1:
            convertView = layoutInflator.inflate(R.layout.item_event_1, null);
            break;
        case 2:
            convertView = layoutInflator.inflate(R.layout.item_event_2, null);
            break;
        case 3:
            convertView = layoutInflator.inflate(R.layout.item_event_3, null);
            break;
        }

    }
    switch (getItemViewType(position)){
    case 0:
        TextView date0=(TextView)convertView.findViewById(R.id.date0);
        TextView text0=(TextView)convertView.findViewById(R.id.text0);
        date0.setText(""+c.getString(c.getColumnIndex(Data.E_DATE)));
        text0.setText(""+c.getString(c.getColumnIndex(Data.E_TEXT)));
        break;
    case 1:
        TextView date1=(TextView)convertView.findViewById(R.id.date1);
        TextView text1=(TextView)convertView.findViewById(R.id.text1);
        date1.setText(""+c.getString(c.getColumnIndex(Data.E_DATE)));
        text1.setText(""+c.getString(c.getColumnIndex(Data.E_TEXT)));
    case 2:
        TextView date2=(TextView)convertView.findViewById(R.id.date2);
        TextView text2=(TextView)convertView.findViewById(R.id.text2);
        date2.setText(""+c.getString(c.getColumnIndex(Data.E_DATE)));
        text2.setText(""+c.getString(c.getColumnIndex(Data.E_TEXT)));
    case 3:
        TextView date3=(TextView)convertView.findViewById(R.id.date3);
        TextView text3=(TextView)convertView.findViewById(R.id.text3);
        date3.setText(""+c.getString(c.getColumnIndex(Data.E_DATE)));
        text3.setText(""+c.getString(c.getColumnIndex(Data.E_TEXT)));
    }
    return convertView;
}

@Override
public int getItemViewType(int position) {
    int type = 0;
    int returnInt = 0;
    Cursor c= getCursor();
    c.moveToPosition(position);
    type= c.getInt(c.getColumnIndex(Data.E_TYPE));
    switch (type){
    case Data.RECEIVED_READ:
        returnInt=3;
    case Data.RECEIVED_UNREAD: 
        returnInt= 2;
    case Data.SENT_COMPLETED:
        returnInt= 1;
    case Data.SENT_PROGRESS:
        returnInt= 0;
    default:
        returnInt=0;
    }
    return returnInt;
}

@Override
public int getViewTypeCount() {
    return 4;
}

    }