background

问题 I want to know of any pure QML way to find out whether the application is in the background or not and then accordingly stop or play music. In meego the alternate way to do is through the PlatformWindow Element but it does not exist in Symbian QML. Help needed please 回答1: Finally I got it working :) and i did it though Qt way... here are the steps 1) Create a class MyEventFilter class myEventFilter : public QObject { bool eventFilter(QObject *obj, QEvent *event) { switch(event->type()) { case

问题 When I use RecyclerView to show list data in my app, the RecyclerView's backgroundcolor always been white: I set the backgroundcolor in xml file and code, but it does not work: //activity_main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" android:orientation="vertical" android:background="@color/colorPrimary"> <!--

问题 Is possible to draw a Shape that has a background made by slanted lines? An example with Rectangle (sorry for the image quality): And if i want dashed lines or change the line properties (stroke, thickness..)? 回答1: You can use solution from this article http://mark-dot-net.blogspot.com/2007/06/creating-hatched-patterned-brush-in-wpf.html <VisualBrush x:Key="HatchBrush" TileMode="Tile" Viewport="0,0,10,10" ViewportUnits="Absolute" Viewbox="0,0,10,10" ViewboxUnits="Absolute"> <VisualBrush

问题 Is possible to draw a Shape that has a background made by slanted lines? An example with Rectangle (sorry for the image quality): And if i want dashed lines or change the line properties (stroke, thickness..)? 回答1: You can use solution from this article http://mark-dot-net.blogspot.com/2007/06/creating-hatched-patterned-brush-in-wpf.html <VisualBrush x:Key="HatchBrush" TileMode="Tile" Viewport="0,0,10,10" ViewportUnits="Absolute" Viewbox="0,0,10,10" ViewboxUnits="Absolute"> <VisualBrush

问题 I've created UITabBarController in my application. Then in viewDidLoad() I want to change UITabBar background image. Here is the code I'm trying to make it works: class MainTabBarController: UITabBarController { override func viewDidLoad() { super.viewDidLoad() UITabBar.appearance().translucent = false UITabBar.appearance().backgroundColor = UIColor.clearColor() UITabBar.appearance().backgroundImage = UIImage(named: "tabbar_background") UITabBar.appearance().contentMode = .ScaleAspectFit } }

问题 I thought this would be a simple question but I am having trouble finding an answer. I have a single ImageView object associated with a JavaFX Scene object and I want to load large images in from disk and display them in sequence one after another using the ImageView. I have been trying to find a good way to repeatedly check the Image object and when it is done loading in the background set it to the ImageView and then start loading a new Image object. The code I have come up with (below)

问题 I thought this would be a simple question but I am having trouble finding an answer. I have a single ImageView object associated with a JavaFX Scene object and I want to load large images in from disk and display them in sequence one after another using the ImageView. I have been trying to find a good way to repeatedly check the Image object and when it is done loading in the background set it to the ImageView and then start loading a new Image object. The code I have come up with (below)

问题 So for about 4 years in our enterprise environment we were happily using VOIP push notifications to remotely access user's tablets for maintenance and remote data repair purposes. Unlike regular APNS, VOIP push notifications would access the app even if weren't running. I should have figured apple would kill it sometime. Is anyone aware of a private API to bypass the pushkit requirement to call reportNewIncomingCallWithUUID which brings about a full screen call UI, or another mechanism that I

问题 So for about 4 years in our enterprise environment we were happily using VOIP push notifications to remotely access user's tablets for maintenance and remote data repair purposes. Unlike regular APNS, VOIP push notifications would access the app even if weren't running. I should have figured apple would kill it sometime. Is anyone aware of a private API to bypass the pushkit requirement to call reportNewIncomingCallWithUUID which brings about a full screen call UI, or another mechanism that I

问题 So for about 4 years in our enterprise environment we were happily using VOIP push notifications to remotely access user's tablets for maintenance and remote data repair purposes. Unlike regular APNS, VOIP push notifications would access the app even if weren't running. I should have figured apple would kill it sometime. Is anyone aware of a private API to bypass the pushkit requirement to call reportNewIncomingCallWithUUID which brings about a full screen call UI, or another mechanism that I