android listview 长按弹出菜单--ContextMenu并进行删除操作

    private List list = new ArrayList();    //为listview创建成员对象    private ListView lv;    private ArrayAdapter myadapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_list_manager);        list.add("first");        list.add("second");        list.add("third");        lv=(ListView)findViewById(R.id.lv);        //设置Adapter        myadapter=new ArrayAdapter(ManagerListActivity.this, android.R.layout.simple_list_item_1,lstQuestions);        lv.setAdapter(myadapter);        //设置ContextMenu,长按listitem时触发        lv.setOnCreateContextMenuListener(new View.OnCreateContextMenuListener() {            @Override            public void onCreateContextMenu(ContextMenu arg0, View arg1,                    ContextMenuInfo arg2) {                // TODO Auto-generated method stub                arg0.setHeaderTitle("选择操作");                arg0.add(0, 0, 0, "删除");                arg0.add(0, 1, 0, "未定");            }        });    }    //设置菜单内容和事件    @Override    public boolean onContextItemSelected(MenuItem item) {        // TODO Auto-generated method stub        AdapterContextMenuInfo info = (AdapterContextMenuInfo)item.getMenuInfo();        //获取点击的item的id        String id = String.valueOf(info.id);          switch(item.getItemId()){        case 0:            Toast.makeText(ManagerListActivity.this, id, Toast.LENGTH_SHORT).show();            /*移除list的某项数据，注意remove()里的数据只能是int，这里用了强制转换，将long转换成int*/            list.remove((int)info.id);            //更新listview的数据            myadapter.notifyDataSetChanged();            return true;        case 1:            Toast.makeText(ManagerListActivity.this, "11", Toast.LENGTH_SHORT).show();            return true;        }        return super.onContextItemSelected(item);    }}
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