如何在可擴展列表項目單擊事件上啓動新活動

Question

我在一個片段中創建了可擴展列表視圖，並且工作正常。不過，我想在可展開的listview子項被點擊時開始一個活動。我找了幾個小時試圖找到解決辦法，但我找不到它。有人請爲此問題提供代碼。

import android.R.color; 
import android.app.Fragment; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseExpandableListAdapter; 
import android.widget.ExpandableListView; 
import android.widget.ExpandableListView.OnChildClickListener; 
import android.widget.TextView; 
import android.widget.Toast; 

     // This is a listfragment class 
     public class Categories extends Fragment { 

      @Override 
      public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
       View v = inflater.inflate(R.layout.categories, null); 
       ExpandableListView elv = (ExpandableListView) v.findViewById(R.id.expandableListView1); 
       elv.setAdapter(new SavedTabsListAdapter()); 
       return v; 
      } 

      public class SavedTabsListAdapter extends BaseExpandableListAdapter { 

       private String[] groups = { "g1", "g2"}; 

       private String[][] children = { 
        { "c1", "2}, 
        { "1", "2"} 
       }; 

       @Override 
       public int getGroupCount() { 
        return groups.length; 
       } 

       @Override 
       public int getChildrenCount(int i) { 
        return children[i].length; 
       } 

       @Override 
       public Object getGroup(int i) { 
        return groups[i]; 
       } 

       @Override 
       public Object getChild(int i, int i1) { 
        return children[i][i1]; 
       } 

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

       @Override 
       public long getChildId(int i, int i1) { 
        return i1; 
       } 

       @Override 
       public boolean hasStableIds() { 
        return true; 
       } 

       @Override 
       public View getGroupView(int i, boolean b, View view, ViewGroup viewGroup) { 
        TextView textView = new TextView(CategoriesFragment.this.getActivity()); 
        textView.setText(getGroup(i).toString()); 
        return textView; 
       } 

       @Override 
       public View getChildView(int i, int i1, boolean b, View view, ViewGroup viewGroup) { 
        TextView textView = new TextView(CategoriesFragment.this.getActivity()); 
        textView.setText(getChild(i, i1).toString()); 
        return textView; 
       } 

       @Override 
       public boolean isChildSelectable(int i, int i1) { 
        return true; 
       } 

      } 



     } 

Answer 1

在片段

例如落實ExpandableListView.OnGroupClickListener和ExpandableListView.OnChildClickListener接口

public class Categories extends Fragment implements ExpandableListView.OnGroupClickListener, ExpandableListView.OnChildClickListener { 
    public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id { 
    ... 
    } 

    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { 
    ... 
    } 
} 

然後在您的onCreateView方法中添加片段作爲偵聽器。

elv.setOnGroupClickListener(this); 
elv.setOnChildClickListener(this);