点击删除按钮没反应，请问 要怎么改


lv=(ListView)findViewById(R.id.lv);       
 lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {  
            @Override  
            public void onItemClick(AdapterView<?> adapterView, View view, int position,  
                long id) {  
             //final int selectedPosition = adapterView.getSelectedItemPosition();
             final View v1=adapterView.getChildAt(position);  
                v1.setBackgroundColor(Color.RED);  
             Button delete=(Button)findViewById(R.id.bt_deleteman);
        delete.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
listitems.remove(v1);

}
});
            }  
        });