ExpandableListview OnGroupClickListener不生效

Question

我關注此：Programmatically collapse a group in ExpandableListView。我希望用戶一次只能擴展一個組，並平滑地滾動到正確的位置。我已經寫了實現OnGroupClickListener自定義適配器：

public class CategoriesListAdapter extends BaseExpandableListAdapter implements OnGroupClickListener { 

    private ExpandableListView expListView; 
    private int lastExpandedGroupPosition = -1; 

    // I get the expListView in the constructor... 

    @Override 
    public boolean onGroupClick(ExpandableListView parent, View view, int groupPosition, long id) { 

     parent.smoothScrollToPosition(groupPosition); 

     if (parent.isGroupExpanded(groupPosition)) { 
      parent.collapseGroup(groupPosition); 
     } else { 
      parent.expandGroup(groupPosition); 
     } 

     return true; 
    } 

    @Override 
    public void onGroupExpanded(int groupPosition) { 

     if (groupPosition != lastExpandedGroupPosition) { 
      expListView.collapseGroup(lastExpandedGroupPosition); 
     } 

     super.onGroupExpanded(groupPosition); 
     lastExpandedGroupPosition = groupPosition; 
    } 
} 

不幸的是，onGroupClick事件從來沒有發射。（我已經把一些日誌的方法內）。我也試過：

expListView.setOnGroupClickListener(new OnGroupClickListener() { 
    @Override 
    public boolean onGroupClick(ExpandableListView parent, View view, int groupPosition, long id) { 
     // Same as above... 
    }); 
} 

相同結果爲這種替代...任何想法？

Answer 1

我會建議您檢查進口第一（在你的問題未顯示），並確保您已導入android.widget.ExpandableListView.OnGroupClickListener

或更換：new OnGroupClickListener() {

與new android.widget.ExpandableListView.OnGroupClickListener {

編輯：

我也注意到你在boolean onGroupClick(...)的主體處返回'true'意思是「點擊w按照處理的方式進行「，團隊永遠不會崩潰，擴大。

如果你想expand.So我建議你做這樣你應該返回false：

expListView.setOnGroupClickListener(new OnGroupClickListener() { 
      @Override 
      public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { 
       Log.d("onGroupClick:", "worked"); 

       parent.smoothScrollToPosition(groupPosition); 

       if (parent.isGroupExpanded(groupPosition)) { 
        parent.collapseGroup(groupPosition); 
       } else { 
        parent.expandGroup(groupPosition); 
       } 

       return false; 
      } 
     });