什么是onItemClick中的父级和视图？

Question

我很难理解以下方法.在文档中,方法描述如下:

public abstract void onItemClick (AdapterView<?> parent, View view, int position, long id)


Parameters:
parent      The AdapterView where the click happened.
view        The view within the AdapterView that was clicked (this will be a view provided by the adapter)
position     The position of the view in the adapter.
id           The row id of the item that was clicked.

我理解最后两个,但无法理解parent这里有什么,为什么view需要？

如果有人有一个很好的解释,那么请让我理解.

Answer 1

AdapterView可以是ListView,GridView,Spinner等.这在Java中称为泛型.您可以在代码中使用parent来对整个视图执行某些操作.例如,如果您使用的是ListView,则可以通过以下代码行隐藏整个ListView:

parent.setVisibility(View.GONE);

视图引用AdapterView中的特定项.在ListView中,它是行.因此,您可以通过说出以下内容来获取对行内TextView的引用:

TextView myTextView = (TextView) view.findViewById(R.id.textView1);
String text = myTextView.getText().toString();