scrollview

问题 I need to call the UIScrollViewDelegate methods I don't know how to create UnsafeMutablePointer object. let pointer:UnsafeMutablePointer<CGPoint> = CGPoint(x: 0, y: 1) as! UnsafeMutablePointer<CGPoint> self.scrollViewWillEndDragging(self.collectionView, withVelocity: CGPoint(x: 0, y: 1), targetContentOffset: pointer) func scrollViewWillEndDragging(scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) { //Some code here } 回答1: import

问题 Do you know if it is possible to know if an Android Widget ScrollView can scroll? If it has enough space it doesn't need to scroll, but as soon as a dimension exceeds a maximum value the widget can scroll. I don't see in the reference a method who can give this information. Maybe is it possible to do something with the size of the linearlayout inside the scrollview? 回答1: I used the following code inspired by https://stackoverflow.com/a/18574328/3439686 and it works! ScrollView scrollView =

问题 Here is my XML: <ScrollView android:layout_height="wrap_content" android:layout_width="fill_parent" android:layout_below="@id/header_layout"> <ViewFlipper android:id="@+id/active_sessions_flipper" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_below="@id/header_layout" android:layout_above="@id/dots_layout"> </ViewFlipper> </ScrollView> For my landscape viewing, I've put a scrollview around the viewflipper, which allows me to easily scroll up and down.

问题 I have a WebView inside the ScrollView . The content of WebView dyanamically changes when it displays different html page. I have the following issue: For example I have A.html , and B.html . The content of B.html is larger than A.html , so the page is longer. When WebView load B.html , the ScrollView stretches its size to enable itself scroll for B.html, then if I go back to A.html , ScrollView doesn't resize itself. (The scroll area is exceed the content of A.html ) What I want to have, is

问题 I have a WebView inside the ScrollView . The content of WebView dyanamically changes when it displays different html page. I have the following issue: For example I have A.html , and B.html . The content of B.html is larger than A.html , so the page is longer. When WebView load B.html , the ScrollView stretches its size to enable itself scroll for B.html, then if I go back to A.html , ScrollView doesn't resize itself. (The scroll area is exceed the content of A.html ) What I want to have, is

问题 I have a WebView inside the ScrollView . The content of WebView dyanamically changes when it displays different html page. I have the following issue: For example I have A.html , and B.html . The content of B.html is larger than A.html , so the page is longer. When WebView load B.html , the ScrollView stretches its size to enable itself scroll for B.html, then if I go back to A.html , ScrollView doesn't resize itself. (The scroll area is exceed the content of A.html ) What I want to have, is

问题 i use in expandable listview and when i open one of the items in the listview my scroll is automatically focus on the item that open, can i prevent from the list to focus on the new item and stay in the same place? i've try to remove the focusable from the open's view but it didn't work. 回答1: You need to override the OnGroupClickListener and consume the event. This will avoid the ExpandableListView doing the default action, which at least when compiling against 4.3 is to smoothScroll to the

问题 So, I've been looking at the ImageView source for a while, but I haven't figured out a hook to do this yet. The problem: having, let's say, 30 400x800 images inside a ScrollView (the number of images is variable). Since they fit exactly in the screen they will take 1.3 MB of RAM each. What I want: to be able to load/unload bitmaps for the ImageViews that are currently visible inside a ScrollView. If the user scrolls and the bitmap is no longer visible (within a distance threshold) the bitmap

问题 I have solved my question. I chose to instead have a header and a footer that are always located at the bottom and top of the screen respectively. Then I created a "center content" which I enclosed within a ScrollView layout. I have updated the code below if people are interested in seeing what it now looks like. <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill

问题 I have one table "TABLE_SUBJECT" which contain a number of subjects. I need to create one horizontal scroll view with Subject. How do I create a ScrollView with database items programmatically? If I enter 1o subject then it will be appear in scroll view as a button. Is it possible? 回答1: you may create it as below: ScrollView scroll = new ScrollView(context); scroll.setBackgroundColor(android.R.color.transparent); scroll.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams