listview

问题 I have a basic ListView with a few columns. I create a ListViewItem using: ListViewItem item = new ListViewItem(); item.Text = "First"; item.SubItems[1].Text = "Second"; Then I add the ListViewItem to my ListView ListView1.Items.Add(item); So, I have a method where I change the Font of the ListView1 , and if the ListView changes the font, all ListViewItem-s do as well. But if I use the .Clone() function ListView1.Items.Add((ListViewItem)item.Clone()); It clones the ListViewItem and it hard

问题 I have a listview inside my ConstraintLayout and I read its supposed to automatically be scrollable, but the list just gets cut-off at the bottom with more items left to be displayed and its not scrollable, I dont know if Im setting some atribute wrong or if I have to add something for listview to scroll?? Here is my code <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas

问题 I have populated recyclerview from sqlite .when clicking each row ,row will delete from sqlite but recyclerview not showing updated list after delete. Recycler view show updated list only after launching activity once again. My question is how to update the recycler view soon after deleting an item from the recylcerview without refresh. following are my code SecondActivity.java import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget

问题 I have created a ListView in which I would like each item to open a certain .pdf file located in assets/PDFS folder located within my Android App. The following code does not throw any errors, but does not open the file either. Can someone share an idea for the solution? Note that I am using Fragment public class FreshFragment extends Fragment implements OnItemClickListener { ListView lv; String[] titles; public FreshFragment() { } @Override public View onCreateView(LayoutInflater inflater,

问题 Here's what I've in my QML: import QtQuick 2.12 import QtQuick.Window 2.12 import QtQuick.Controls 2.5 import QtQuick.Layouts 1.3 Window { visible: true width: 640 height: 480 title: "Test Window" ListView{ id: listView width: parent.width height: parent.height model: testContext.List interactive: false delegate: ItemDelegate { width: parent.width leftPadding: 3 rightPadding: scroll.width topPadding: 3 bottomPadding: 3 /* padding: { leftPadding: 3 rightPadding: scroll.width topPadding: 3

问题 I tried to do the Write Your First Flutter App, part 2 flutter app page 5 I now have a question for this application. I want to remove an entry from that List onLongPress like this: onLongPress: () { setState(() { _saved.remove(pair); }); }, This will remove the item from the list but won't update the screen. On returning to the home and reopening this route the new items without the deleted. But how can I trigger the update on this page without the user to reopen the page. import 'package

问题 I am new to flutter and I want to make a list of cards like this. I tried to Understand the original Project but I am not able to figure out. I just want to make an expandable card without the background gif/video effect Thanks... 回答1: try to add an ExpansionTile inside a Card , this will expand the Card when you expand the ExpansionTile Card( child: Padding( padding: EdgeInsets.only( top: 36.0, left: 6.0, right: 6.0, bottom: 6.0), child: ExpansionTile( title: Text('Birth of Universe'),

问题 I'm trying to retrieve posts from a Firestore collection called "posts", which contains the post creator's userID and post description and this is possible by using both StreamBuilder and FutureBuilder(Not preferable, because it gets a snapshot only once and doesn't update when a field changes). However, I want to query another collection called "users" with the post creator's userID and retrieve the document that matches the userId. This was my first approach: StreamBuilder<QuerySnapshot>(

问题 This question already has an answer here : When i am trying to upload it in market it shows.. “You need to reduce your APK file size to 50MB or use APK Expansion Files.” [closed] (1 answer) Closed 3 years ago . When I try to upload my application in Google Play I get the following error message: "You need to reduce your APK file size to 100MB or use APK Expansion Files." Can someone explain me the steps that I have to do to expand the files? I really don't have any idea about what I have to

问题 This question already has an answer here : When i am trying to upload it in market it shows.. “You need to reduce your APK file size to 50MB or use APK Expansion Files.” [closed] (1 answer) Closed 3 years ago . When I try to upload my application in Google Play I get the following error message: "You need to reduce your APK file size to 100MB or use APK Expansion Files." Can someone explain me the steps that I have to do to expand the files? I really don't have any idea about what I have to