創建上下文對象
View 事件源.setOnCreateContextMenuListener(new OnCreateContextMenuListener(){
public void onCreateContextMenu(ContextMenu menu,View v,ContextMenuInfo menuInfo){
}
});
menu---創建的上下文菜單對象
v---導致此菜單彈出的事件源
menuInfo---上下文菜單信息
上下文菜單的單擊處理事件:
重寫Activity的OnContextItemSelected(MenuItem item)方法---item代表每個菜單項
/**
* 上下文菜單項的單擊事件處理方法
*/
@Override
public boolean onContextItemSelected(MenuItem item) {
// TODO Auto-generated method stub
AdapterContextMenuInfo info = (AdapterContextMenuInfo)item.getMenuInfo();
//MenuItem是一個接口
//我們從MenuItem中請求AdapterContextMenuInfo,該對象提供當前選中項的信息
switch (item.getItemId()) {
case MENU_CONTEXT_DELETE://刪除
adapter.removeItem(info.position);
break;
case MENU_CONTEXT_DETAILS://詳情
Music music = (Music)adapter.getItem(info.position);
builder.setMessage(music.toString())
.show();
break;
case MENU_CONTEXT_UPDATE://修改
break;
}
return super.onContextItemSelected(item);
}