Question

在我的展开式列表视图中，我有一个textView和一个imagebutton。当我点击可展开列表的textView或子视图时，它应显示alertbox。我可以使用onChildClick来实现此目的，但在imagebutton后的子视图中我有一个textView。当我点击它时，它应该执行另一个活动。我不知道如何在可扩展列表中实现它。

这是我的可扩展列表代码。请检查一下。我也试过了android:onClick="myClickHandler"。我得到了一些illegalstateException。

这是我的代码：

import android.app.ExpandableListActivity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ExpandableListView;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.SimpleExpandableListAdapter;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
import java.util.ArrayList;
import java.util.HashMap;
import android.util.Log;

public class CoctailsActivity extends ExpandableListActivity implements OnClickListener
{
    private static final String LOG_TAG = "ElistCBox";
    public static ImageButton img_button;

    static final String Group[] = {
      "A",
      "B",
      "C",
      "D"
    };

    static final String Children[][] = {
      {
        "lightgrey",
        "dimgray",
        "sgi gray 92"
      },
      {
        "dodgerblue 2",
        "steelblue 2",
        "powderblue",
      },
      {
        "yellow 1",
        "gold 1",
        "darkgoldenrod 1",
      },
      {
        "indianred 1",
        "firebrick 1",
        "maroon",
      }
    };

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle icicle)
    {
        super.onCreate(icicle);
        setContentView(R.layout.exp_list);

        SimpleExpandableListAdapter expListAdapter =new SimpleExpandableListAdapter
            (
                this,
                createGroupList(),  
                R.layout.group_row, 
                new String[] { "Group" },   
                new int[] { R.id.group_name },      
                createChildList(),  
                R.layout.child_row, 
                new String[] { "Children"}, 
                new int[] { R.id.child_name }   
            );
        setListAdapter( expListAdapter );


    }

    public void  onContentChanged  () 
    {
        super.onContentChanged();
        Log.d( LOG_TAG, "onContentChanged" );
    }
    public void myClickHandler(View v) 
    {
        Log.v( LOG_TAG, "insideMyHandler" );



        ExpandableListView lvItems = getExpandableListView();
        for (int i=0; i < lvItems.getChildCount(); i++) 
        {
            lvItems.getChildAt(i).setBackgroundColor(Color.BLUE);        
        }



        LinearLayout vwParentRow = (LinearLayout)v.getParent();

        TextView child = (TextView)vwParentRow.getChildAt(0);
        Button btnChild = (Button)vwParentRow.getChildAt(1);
        btnChild.setText(child.getText());
        btnChild.setText("I've been clicked!");

        int c = Color.CYAN;

        vwParentRow.setBackgroundColor(c); 
        vwParentRow.refreshDrawableState();       
    }


   public boolean onChildClick(ExpandableListView parent,View v,int groupPosition,int childPosition,long id) 
   {
        Log.d( LOG_TAG, "onChildClick: "+childPosition );

        return false;
    }

    public void  onGroupExpand  (int groupPosition) {
        Log.d( LOG_TAG,"onGroupExpand: "+groupPosition );
    }

    private List<HashMap<String, String>> createGroupList() {
      ArrayList<HashMap<String, String>> result = new ArrayList<HashMap<String, String>>();
      for( int i = 0 ; i < Group.length ; ++i ) {
        HashMap<String, String> m = new HashMap<String, String>();
        m.put( "Group",Group[i] );
        result.add( m );
      }
      return (List<HashMap<String, String>>)result;
    }

  private List<ArrayList<HashMap<String, String>>> createChildList() {
    ArrayList<ArrayList<HashMap<String, String>>> result = new ArrayList<ArrayList<HashMap<String, String>>>();
    for( int i = 0 ; i < Children.length ; ++i ) 
    {
// Second-level lists
      ArrayList<HashMap<String, String>> secList = new ArrayList<HashMap<String, String>>();
      for( int n = 0 ; n < Children[i].length ; n += 2 ) 
      {
        HashMap<String, String> child = new HashMap<String, String>();
        child.put( "Children", Children[i][n] );
        //child.put( "rgb", shades[i][n+1] );
        secList.add( child );
      }
      result.add( secList );
    }
    return result;
  }

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    img_button =(ImageButton)v.findViewById(R.id.img01);
    if(img_button!=null){
        Log.v( LOG_TAG, "onclick clickedddddd" );
    }

}

}

请帮帮我。

Answer 1

我自己没有尝试过，但我认为点击事件上的按钮可以由活动处理，就像你在任何其他按钮上点击事件一样。

可以阅读本文：http://developer.android.com/guide/topics/ui/ui-events.html

看看是否有帮助。

否则，我确信您可以构建一个onClick侦听器对象并通过特定按钮传递它。该链接应该可以帮到你。

Answer 2

Kris，为什么不实施ExpandableListAdapte r。它们位于API演示示例 - ExpandableList1.java中，然后覆盖getGroupView或getChildView以根据需要设置onClickListeners。

如何为可扩展列表的子项实现不同的点击事件？

2 个答案: