我需要在主頁屏幕中添加拉動刷新。一開始，axml 是：初始代碼 [1]:https://pastebin.com/iZNFiqgt我添加了 swipeRefreshLayout 所以：代碼滑動刷新在課堂上，我添加了以下代碼：............SwipeRefreshLayout refreshLayoutprotected override void OnCreate (Bundle savedInstanceState){.........refreshLayout = FindViewById<SwipeRefreshLayout> . (Resource.Id.swipeRefreshLayout1);refreshLayout.Refresh += RefreshLayout_Refresh}void RefreshLayout_Refresh(object sender, EventArgs e){ //insert action pull to refresh Console.WriteLine("start pull to refresh"); //after delete it and insert the action }但是當我嘗試 pullRefresh 頁面時應用程序崩潰。錯誤是：
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當年話下
TA貢獻1890條經驗 獲得超9個贊
只要用戶可以通過垂直滑動手勢刷新視圖的SwipeRefreshLayout內容，就應該使用 。閱讀更多
所以，SwipeRefreshLayout它的行為就像一個容器，所以SwipeRefreshLayout你應該在里面添加一個ListVieworGridView來讓它工作，如下所示：
請記住，SwipeRefreshLayout只支持一個ListView或一個GridView孩子。
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipeRefreshLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
然后，設置您的視圖元素：
SwipeRefreshLayout swipeRefreshLayout;
ListView listView;
protected override void OnCreate(Bundle savedInstanceState)
{
// ...
listView = view.FindViewById<ListView>(Resource.Id.list);
swipeRefreshLayout = view.FindViewById<SwipeRefreshLayout>(Resource.Id.swipeRefreshLayout);
// Elevation helps users understand the relative importance of each element and focus their attention to the task at hand. (Optional)
// swipeRefreshLayout.Elevation = 10;
swipeRefreshLayout.Refresh += delegate (object sender, System.EventArgs e)
{
// logic...
};
// ...
}
此外，您可以通過以下方式手動觸發SwipeRefreshLayout：
swipeRefreshLayout.Post(() => {
swipeRefreshLayout.Refreshing = true;
listView.Clickable = false;
});
// logic...
swipeRefreshLayout.Post(() => {
swipeRefreshLayout.Refreshing = false;
listView.Clickable = true;
});
我希望這可以幫助你。
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