Flex [original] replaces splashscreenimage attributes with pre-loaded images on mobile terminals

Flex mobile client masterProgramProperty splashscreenimage: You can set the preload image.

However, it only supports mxml and does not support the compilation of ActionScript.

Provides a solution to solve this problem.

Environment: Flex 4.6.0 (required. If it is 4.5, an error will be reported when the screen is rotated)

 

 

1: imagepreloader preload class

 Package  {  Import  Flash. display. Bitmap;  Import  Flash. display. displayobject;  Import  Flash. display. loader;  Import Flash. display. Sprite;  Import  Flash. Events. event;  Import  Flash. Events. ioerrorevent;  Import  Flash. Geom. matrix;  Import  Flash.net. URLRequest;  Import  Flash. utils. gettimer;  Import  MX. Events. flexevent;  Import MX. preloaders. ipreloaderdisplay;  Import  MX. preloaders. preloader;  /**  * <P> image preloader </P> * replace the property splashscreenimage of application, * It Can Be dynamic changed by splashimageurl and suppport ActionScript *  @ Author  Yaoyf * @ date 2012-07-02 *  */      Public   Class Imagepreloader Extends Sprite Implements Ipreloaderdisplay {  Private   Const Letterbox: String = "letterbox" ;  Private   Const Zoom: String = "zoom" ;  Private   Const Stretch: String = "stretch" ;  Private  VaR splashimage: displayobject;  Private VaR splashimagewidth: number;  Private  VaR splashimageheight: number;  Private VaR splashimageclass: class = Null  ;  Private VaR Loader: loader = Null  ;  Private VaR scalemode: String = Letterbox;  Private VaR minimumdisplaytime: Number = 3000;  Private VaR checkwaittime: Boolean = False  ;  Private VaR displaytimestart: Int =-1 ;  Private  VaR _ stageheight: number;  Private  VaR _ stagewidth: number;  Private VaR splashimageurl: String = Null ;  Public  Function imagepreloader (){  Super  ();}  /**  * Initialize *  */          Public Function initialize (): Void  {Splashimageurl = "Preloader.jpg "; //  Your image URL Checkwaittime = Minimumdisplaytime> 0 ;  If  (Checkwaittime)  If (Displaytimestart =-1 )  This . Displaytimestart = Flash. utils. gettimer (); Loader = New  Loader (); loader. Load (  New URLRequest (splashimageurl); loader. contentloaderinfo. addeventlistener (event. Complete, oncomplete); loader. contentloaderinfo. addeventlistener (ioerrorevent. io_error, onioevent );  This . Stage. addeventlistener (event. Resize, stageresizehandler, False , 0, True  );}  Private Function stageresizehandler (Event: Event ): Void  {Scalematrix ();}  Protected Function onioevent (Event: ioerrorevent ): Void {Trace ("ioerror has occured:" + Event. Text );}  Protected Function oncomplete (Event: Event ): Void  {Dispose (); splashimage = Bitmap(event.tar get. content); addchildat (splashimage, 0 );  This . Splashimagewidth = Splashimage. width;  This . Splashimageheight = Splashimage. height; scalematrix ();}  /**  * Scale matrix of splashimage *  */          Private Function scalematrix (): Void  {  If (! Splashimage)  Return  ; Var dpiscale: Number = This . Root. scalex; var stagewidth: Number = Stage. stagewidth/ Dpiscale; var stageheight: Number = Stage. stageheight/ Dpiscale; var width: Number = Splashimagewidth; var height: Number = Splashimageheight; var M: Matrix = New  Matrix (); var scalex: Number = 1 ; Var scaley: Number = 1 ;  Switch (Scalemode ){  Case  Zoom: scalex = Math. Max (stagewidth/width, stageheight/ Height); scaley = Scalex;  Break  ;  Case  Letterbox: scalex = Math. Min (stagewidth/width, stageheight/ Height); scaley = Scalex; Break  ;  Case  Stretch: scalex = Stagewidth/ Width; scaley = Stageheight/ Height;  Break  ;}  If (Scalex! = 1 | scaley! = 0 ) {Width * = Scalex; Height * =Scaley; M. Scale (scalex, scaley);} M. Translate ( -Width/2,-height/2 ); M. Translate (stagewidth /2, stageheight/2 ); Splashimage. Transform. Matrix = M ;}  /**  * Get current display time *  */          Private Function get currentdisplaytime (): Int  {  If (-1 = Displaytimestart)  Return -1 ;  Return Flash. utils. gettimer ()- Displaytimestart ;}  //  Implements          Public Function set preloader (OBJ: SPRITE ): Void  {Obj. addeventlistener (flexevent. init_complete, preloader_initcompletehandler,  False , 0,True  );}  Private Function preloader_initcompletehandler (Event: Event ): Void  {  If (Checkwaittime & currentdisplaytime < Minimumdisplaytime)  This  . Addeventlistener (event. enter_frame, initcompleteenterframehandler );  Else  Dispatchcomplete ();} Private Function initcompleteenterframehandler (Event: Event ): Void  {  If (Currentdisplaytime <= minimumdisplaytime) Return  ; Dispatchcomplete ();}  Private Function dispatchcomplete (): Void  {Dispose (); var preloader: preloader = This . Parent as preloader; preloader. removeeventlistener (flexevent. init_complete, preloader_initcompletehandler,  False  );  This  . Removeeventlistener (event. enter_frame, initcompleteenterframehandler );  This . Stage. removeeventlistener (event. Resize, stageresizehandler, False  ); Dispatchevent (  New  Event (event. Complete ));}  /** * Dispose resource *  */          Private Function dispose (): Void  {  If  (Splashimage ){  If ( This  . Contains (splashimage ))  This  . Removechild (splashimage); var bit: bitmap =Splashimage as bitmap;  If  (Bit. bitmapdata) {bit. bitmapdata. Dispose (); bit. bitmapdata = Null  ;}}}  //  ---------------- Implements -----------------  //          Public Function get backgroundalpha (): number { Return 0 ;} Public Function set backgroundalpha (value: number ): Void  {}  Public Function get backgroundcolor (): uint { Return 0 ;}  Public Function set backgroundcolor (value: uint ): Void  {}  Public Function get backgroundimage (): object { Return   Null  ;} Public Function set backgroundimage (value: Object ): Void  {}  Public Function get backgroundsize (): String { Return   Null  ;}  Public Function set backgroundsize (value: string ): Void  {}  Public Function get stageheight (): number { Return  _ Stageheight ;} Public Function set stageheight (value: number ): Void {_ Stageheight = Value ;}  Public Function get stagewidth (): number { Return  _ Stagewidth ;}  Public Function set stagewidth (value: number ): Void {_ Stagewidth = Value ;}}} 

 

 

2: Call method:

Main Program

<? XML version = "1.0" encoding = "UTF-8"?> <S: viewnavigatorapplication xmlns: FX = "http://ns.adobe.com/mxml/2009"Xmlns: S= "Library: // ns.adobe.com/flex/spark"Firstview= "Views. sample_flexmobilepreloaderview"Applicationdpi= "160"Preloader= "Imagepreloader"> </S: viewnavigatorapplication>