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MainActivity如下:

package cc.wy;import java.util.ArrayList;import android.app.Activity;import android.app.ActionBar.LayoutParams;import android.content.Context;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.Button;import android.widget.ListPopupWindow;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;/** * Demo描述: * ListPopupWindow使用完整示例(二)——自定义ListPopupWindow *  * 参考资料: * 1 http://blog.csdn.net/rambomatrix/article/details/23525379 * 2 http://blog.csdn.net/jsnrwzm/article/details/14408835 *   Thank you very much *    */public class MainActivity extends Activity {	private Context mContext;	private Button mButton;	private ArrayList
   
     mArrayList;	private ListPopupWindow mListPopupWindow;	private ListPopupWindowAdapter mListPopupWindowAdapter;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        init();    }        private void init(){    	mContext=this;    	mArrayList=new ArrayList
    
     ();    	mArrayList.add("第一个子项");    	mArrayList.add("第二个子项");    	mArrayList.add("第三个子项");    	mListPopupWindow=new ListPopupWindow(mContext);    	//自定义Adapter    	mListPopupWindowAdapter=new ListPopupWindowAdapter(mArrayList, mContext);    	mListPopupWindow.setAdapter(mListPopupWindowAdapter);    	//mListPopupWindow.setBackgroundDrawable(mContext.getResources().getDrawable(R.drawable.ic_launcher));    	mListPopupWindow.setWidth(200);    	mListPopupWindow.setHeight(LayoutParams.WRAP_CONTENT);    	mListPopupWindow.setOnItemClickListener(new OnItemClickListener() {			@Override			public void onItemClick(AdapterView
      arg0, View arg1, int position,long arg3) {				Toast.makeText(mContext, "点击了"+mArrayList.get(position), Toast.LENGTH_SHORT).show();			}		});    	mButton=(Button) findViewById(R.id.button);    	mButton.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				//指定anchor				mListPopupWindow.setAnchorView(v);				mListPopupWindow.show();			}		});    }}
    
   

package cc.wy;import java.util.ArrayList;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;public class ListPopupWindowAdapter extends BaseAdapter {	private ArrayList
   
     mArrayList;	private Context mContext;	public ListPopupWindowAdapter(ArrayList
    
      list, Context context) {		super();		this.mArrayList = list;		this.mContext = context;	}	@Override	public int getCount() {		if (mArrayList == null) {			return 0;		} else {			return this.mArrayList.size();		}	}	@Override	public Object getItem(int position) {		if (mArrayList == null) {			return null;		} else {			return this.mArrayList.get(position);		}	}	@Override	public long getItemId(int position) {		return position;	}	@Override	public View getView(final int position, View convertView, ViewGroup parent) {		ViewHolder holder = null;		if (convertView == null) {			holder = new ViewHolder();						convertView = LayoutInflater.from(mContext).inflate(R.layout.item, null, false);					holder.itemTextView = (TextView) convertView.findViewById(R.id.itemTextView);			convertView.setTag(holder);		} else {			holder = (ViewHolder) convertView.getTag();		}				if (this.mArrayList != null) {			final String itemName = this.mArrayList.get(position);			if (holder.itemTextView != null) {				holder.itemTextView.setText(itemName);			}		}		return convertView;	}	private class ViewHolder {		TextView itemTextView;	}}
    
   

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