Imitation NetEase Cloud Music album picture Folding Carousel

Imitation NetEase Cloud Music album Pictures folding Carousel first not much to say now on a

First, briefly describe the implementation principle 1. First let our imageview** move.

In fact, it's constant. invalidate (); function let him call the ONDARW function constantly
(Obviously we don't have to constantly call the ONDARW function only when we let him move, so we're going to declare a variable to record whether the change record is animated)

2. Achieve our collapsible effect

Use of the Setpolytopoly method of the matrix
Refer to (http://blog.csdn.net/lmj623565791/article/details/44278417)

3. Make the picture go back and forth in a moment

Paint.setxfermode (Xfermode); Xfermode is how to deal with the overlap effect of two pictures a total of 16 ways to deal with

Implementing Custom ImageView Properties

List of storage bitmap
Variables for animation interval
Variable of animation frame interval
Two handler to send a message
Index of foreground and background

Code

 PackageCom.cust.myview;ImportJava.util.ArrayList;ImportJava.util.List;ImportAndroid.content.Context;ImportAndroid.graphics.Bitmap;ImportAndroid.graphics.BitmapFactory;ImportAndroid.graphics.Canvas;ImportAndroid.graphics.Matrix;ImportAndroid.graphics.Paint;ImportAndroid.graphics.PorterDuff.Mode;ImportAndroid.graphics.PorterDuffXfermode;ImportAndroid.graphics.Xfermode;ImportAndroid.os.Handler;ImportAndroid.util.AttributeSet;ImportAndroid.widget.ImageView;ImportCOM.CUST.UISCHOOL.R; Public  class musicimageview extends ImageView{    PrivateList<bitmap> Mbitmaps;PrivatePaint paint;PrivateXfermode Xfermode;Private BooleanChange//Whether the current transformation    Private intbhjg= the;//Transform interval time    Private intbhsj= -;//Transform time    Private intFrontindex;//Foreground index    Private intBackindex;//Background index    Private Booleansetbitmap=false;//whether set bitmap;    PrivateMatrix Matrix;Private intCount=0;Private intHenght; Public Musicimageview(Context context) { This(Context,NULL); } Public Musicimageview(context context, AttributeSet attrs) { This(Context, Attrs,0); } Public Musicimageview(context context, AttributeSet attrs,intDefstyle) {Super(Context, attrs, Defstyle); Paint=NewPaint (); Paint.setantialias (true); Xfermode=NewPorterduffxfermode (Mode.src_over); Change=false; matrix=NewMatrix ();        Bitmap Map1=bitmapfactory.decoderesource (Getresources (), r.drawable.im2);        Bitmap Map2=bitmapfactory.decoderesource (Getresources (), r.drawable.st); List<bitmap> mbitmaps=NewArraylist<bitmap> ();        Mbitmaps.add (MAP1);        Mbitmaps.add (MAP2);        Setbitmaps (Mbitmaps);        Henght=map1.getheight (); Bhjg= (int) Math.random () * ( the- -)+ -; } Public void Setbitmaps(list<bitmap> mbitmaps) { This. mbitmaps=mbitmaps; setbitmap=true;if(Mbitmaps.size () >=2) {frontindex=0; backindex=1; }Else{frontindex=0; backindex=0; }NewThread () { Public void Run() {handler.postdelayed (run, BHJG);          Handler1.postdelayed (RUN1, BHSJ);      };    }. Start (); } Runnable run1 =NewRunnable () {@Override         Public void Run() {if(change) {Musicimageview. This. Invalidate ();        } handler1.postdelayed (Run1, BHSJ);    }    }; Runnable Run =NewRunnable () {@Override         Public void Run() {change=true;        Handler.postdelayed (run, BHJG);    }    }; Handler handler1=NewHandler (); Handler handler=NewHandler ();@Override    protected void onmeasure(intWidthmeasurespec,intHeightmeasurespec) {Bitmap bmp=mbitmaps.get (backindex);    Setmeasureddimension (Bmp.getwidth (), Bmp.getheight ()); }@Override    protected void OnDraw(Canvas canvas) {Super. OnDraw (canvas);if(change)            {Bitmap bmp=mbitmaps.get (frontindex);            Bitmap Bmp1=mbitmaps.get (Backindex); count++;if(Bmp1.getheight ()-5*count>=bmp1.getheight ()/2)             {//Draw top half imageCanvas.save (); Canvas.cliprect (0,0, Bmp1.getwidth (), bmp1.getheight ()/2); Canvas.drawbitmap (BMP1,0,0, paint); Canvas.restore ();//Draw an off -the-part imageCanvas.save (); Canvas.cliprect (0, Bmp1.getheight ()/2, Bmp1.getwidth (), Bmp1.getheight ()); Canvas.drawbitmap (BMP,0,0, paint); Canvas.restore ();//dynamically change the lower half of the image                 float[] src = {0, Bmp1.getheight ()/2,//  Bmp1.getwidth (), bmp1.getheight ()/2,//  Bmp1.getwidth (), Bmp1.getheight (),//                               0, Bmp1.getheight ()}; Henght=bmp1.getheight ()-5*count;float[] DST = {0, Bmp1.getheight ()/2,//  Bmp1.getwidth (), bmp1.getheight ()/2,//  Bmp1.getwidth (), Henght,//                            0, henght}; System.out.println (count+"");                  Canvas.save (); Matrix.setpolytopoly (SRC,0Dst0, Src.length >>1); Canvas.cliprect (0, Bmp1.getheight ()/2, Bmp1.getwidth (), henght); Paint.setxfermode (NULL);                  Paint.setxfermode (Xfermode);                  Canvas.drawbitmap (Bmp1,matrix, paint);                  Canvas.restore (); Paint.setxfermode (NULL); }Else{//Draw top half imageCanvas.save (); Canvas.cliprect (0,0, Bmp1.getwidth (), bmp1.getheight ()/2); Canvas.drawbitmap (BMP1,0,0, paint); Canvas.restore ();//Draw an off -the-part imageCanvas.save (); Canvas.cliprect (0, Bmp1.getheight ()/2, Bmp1.getwidth (), Bmp1.getheight ()); Canvas.drawbitmap (BMP,0,0, paint); Canvas.restore ();//Change the upper part of the image dynamically                 float[] src = {0,0,//  Bmp1.getwidth (),0,//  Bmp1.getwidth (), bmp1.getheight ()/2,//                               0, Bmp1.getheight ()/2}; Henght=bmp1.getheight ()-5*count;float[] DST = {0, Henght,//  Bmp1.getwidth (), Henght,//  Bmp1.getwidth (), bmp1.getheight ()/2,//                           0, Bmp1.getheight ()/2}; System.out.println (count+"");                  Canvas.save (); Matrix.setpolytopoly (SRC,0Dst0, Src.length >>1); Canvas.cliprect (0, Bmp1.getheight ()/2, Bmp1.getwidth (), henght); Paint.setxfermode (NULL);                  Paint.setxfermode (Xfermode);                  Canvas.drawbitmap (Bmp,matrix, paint);                  Canvas.restore (); Paint.setxfermode (NULL);if(henght<=0)                  {//Description animation end Reset Animation parametersCount=0; Change=false;intTemp=frontindex;                      Frontindex=backindex;                      Backindex=temp; System.out.println ("Change false"); Bhjg= (int) (Math.random () * (8000- the))+ the; System.out.println ("BHJG:"+bhjg+""); }             }        }Else{if(!setbitmap)            {Canvas.drawbitmap (Bitmapfactory.decoderesource (Getresources (), r.drawable.im2), matrix, paint); }        }    }}

Imitation NetEase Cloud Music album picture Folding Carousel