ListView con diapositivas de detalles expandibles

Question

En la aplicación que estoy desarrollando, obtuve una lista de mensajes con Titel Datum, etc. Al hacer clic en Messagetitel, quiero deslizar expandir esta entrada y mostrar los detalles, y algunos botones nuevos como "responder", "eliminar" y "reenviar" .

me gusta:
- mensaje
- Mensaje (mensaje haciendo clic)
Botones de detalles Eliminar, avanzar, responder
texto
- mensaje
- mensaje

Esto es lo que hice hasta ahora:

Primero mi clase de modelo para los mensajes:

public class MyMessage {

private String from;
private String subject;
private String date;
private String message;

public MyMessage(String f, String s, String d, String m){
    from= f;
    subject= s;
    date = d;
    message= m;
}

public String getFrom() {
    return from;
}

public String getSubject() {
    return subject;
}

public String getDate() {
    return date;
}

public String getMessage() {
    return message;
}

}

Mi adaptador personalizado:

public class NewAdapter extends BaseExpandableListAdapter {

public ArrayList<MyMessage> mMessage;
public LayoutInflater minflater;
 public Activity activity;

public NewAdapter(ArrayList<MyMessage> message){
    mMessage = message;
}

 public void setInflater(LayoutInflater mInflater, Activity act) {
      this.minflater = mInflater;
      activity = act;
     }

@Override
public Object getChild(int groupPosition, int childPosition) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public View getChildView(int groupPosition, int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent) {

    TextView text = null;
    // TODO Auto-generated method stub
    if (convertView == null) {
           convertView = minflater.inflate(R.layout.message_details, null);
          }
    text = (TextView) convertView.findViewById(R.id.tv_message_text);
    text.setText(mMessage.get(childPosition).getMessage());
    return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public Object getGroup(int groupPosition) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public int getGroupCount() {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public long getGroupId(int groupPosition) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
        View convertView, ViewGroup parent) {
    TextView from= null;
    TextView date = null;
    TextView subject= null;
    // TODO Auto-generated method stub

    if(convertView == null){
        convertView = minflater.inflate(R.layout.message_head, null);
    }
    from= (TextView) convertView.findViewById(R.id.tv_from);
    date = (TextView) convertView.findViewById(R.id.tv_date);
    subject= (TextView) convertView.findViewById(R.id.tv_subject);

    from.setText(mMessage.get(groupPosition).getfrom());
    date.setText(mMessage.get(groupPosition).getDate());
    subject.setText(mMessage.get(groupPosition).getSubject());


    return convertView;
}

@Override
public boolean hasStableIds() {
    // TODO Auto-generated method stub
    return false;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    // TODO Auto-generated method stub
    return false;
}

}

mi clase principal:

public class Test extends ExpandableListActivity{

public ArrayList<MyMessage> message;
public ExpandableListView eListView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_test);

    eListView = getExpandableListView();

    message = createMessages();
    NewAdapter nAdapter = new NewAdapter(message);
    nAdapter
    .setInflater(
      (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE),
      this);
    getExpandableListView().setAdapter(nAdapter);

}

private ArrayList<MyMessage> createMessages() {

    ArrayList<MyMessage> m = new ArrayList<MyMessage>();
    MyMessage test1 = new MyMessage("test1", "testbetreff", "08.11.2013 / 09:44", "gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so");
    MyMessage test2 = new MyMessage("test2", "testbetreff", "08.11.2013 / 09:45", "gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so");
    MyMessage test3 = new MyMessage("test3", "testbetreff", "08.11.2013 / 09:46", "gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so");
    MyMessage test4 = new MyMessage("test4", "testbetreff", "08.11.2013 / 09:47", "gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanz viel text und so");

    m.add(test1);
    m.add(test2);
    m.add(test3);
    m.add(test4);

    return m;

}

}

No recibo ningún error, pero mi actividad está en blanco. Traté de depurar esto, pero nunca llama a GetChildView () o GetGroupView () y no sé por qué.

¿Estoy cometiendo grandes errores con el adaptador de vestuario? gracias de antemano

Answer 1

 @Override
    public int getChildrenCount(int groupPosition) {
        return 1; //just one children?
    }

    @Override
    public Object getGroup(int groupPosition) {
        return mMessage.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
       return mMessage.size();
    }

    @Override
     public long getGroupId(int groupPosition) {
        return groupPosition;
     }

Prueba esto ... tal vez no se llama porque dijiste que el adaptador no tiene elementos en absoluto ...