仿网易云音乐专辑图片折叠轮播

最新推荐文章于 2022-08-01 20:54:31 发布
黑色之路
最新推荐文章于 2022-08-01 20:54:31 发布
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本文介绍了一种仿网易云音乐专辑图片的折叠轮播效果实现方案，包括自定义ImageView来实现图片的可折叠效果及上下切换动画。通过Matrix的setPolyToPoly方法和Xfermode设置实现图片变形和叠加效果。
仿网易云音乐专辑图片折叠轮播
仿网易云音乐专辑图片折叠轮播

先不多说现上一张效果图

这里写图片描述
首先简述一下实现原理

1.首先让我们的imageview动起来

其实是不断的.invalidate();函数让他不断的调用ondarw函数
（显然我们不必要不断的调用ondarw函数只有在我们让他动的时候调用即可所以我们要声明一个变量记录change记录是否产生动画）
2.实现我们的可折叠效果

Matrix的setPolyToPoly方法的使用
可参考（http://blog.youkuaiyun.com/lmj623565791/article/details/44278417）
3.实现图片一上一下的来回切换

paint.setXfermode(xfermode); xfermode就是如何处理两张图片的重叠效果共有16种处理方式
实现自定义imageview

属性

存放bitmap的list
动画间隔的变量
动画桢间隔的变量
两个handler用于发送消息
前景与背景的索引
代码

<code class="hljs java has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">package</span> com.cust.myview;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.util.ArrayList;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.util.List;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.content.Context;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.graphics.Bitmap;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.graphics.BitmapFactory;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.graphics.Canvas;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.graphics.Matrix;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.graphics.Paint;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.graphics.PorterDuff.Mode;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.graphics.PorterDuffXfermode;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.graphics.Xfermode;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.os.Handler;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.util.AttributeSet;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.widget.ImageView;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> com.cust.uischool.R;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">musicImageView</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">extends</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">ImageView</span>{</span>

    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> List<Bitmap> mbitmaps;
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> Paint paint;
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> Xfermode xfermode;
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> change; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//当前是否变换</span>
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span>  bhjg=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5000</span>; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//变换间隔时间</span>

    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span>  bhsj=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">50</span>; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//变换时间</span>

    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> frontindex;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//前景索引</span>
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> backindex;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//背景索引</span>

    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> setbitmap=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">false</span>; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//是否设置bitmap;</span>

    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> Matrix matrix;

    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> count=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>;

    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> henght;
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-title" style="box-sizing: border-box;">musicImageView</span>(Context context) {
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>(context,<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>);



    }
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-title" style="box-sizing: border-box;">musicImageView</span>(Context context, AttributeSet attrs) {
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>(context, attrs, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>);



    }
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-title" style="box-sizing: border-box;">musicImageView</span>(Context context, AttributeSet attrs, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> defStyle) {
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">super</span>(context, attrs, defStyle);


        paint=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Paint();
        paint.setAntiAlias(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>);
        xfermode=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> PorterDuffXfermode(Mode.SRC_OVER);
        change=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">false</span>;
        matrix=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Matrix();
        Bitmap map1=BitmapFactory.decodeResource(getResources(),R.drawable.im2);
        Bitmap map2=BitmapFactory.decodeResource(getResources(),R.drawable.st);
        List<Bitmap> mbitmaps=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> ArrayList<Bitmap>();
        mbitmaps.add(map1);
        mbitmaps.add(map2);
        setBitmaps(mbitmaps);
        henght=map1.getHeight();

        bhjg=(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span>)Math.random()*(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5000</span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2000</span>)+<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2000</span>;
    }

    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">setBitmaps</span>(List<Bitmap> mbitmaps)
    {
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>.mbitmaps=mbitmaps;
        setbitmap=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(mbitmaps.size()>=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>)
        {
            frontindex=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>;
            backindex=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>;
        }
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span>{
            frontindex=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>;
            backindex=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>;
        }

      <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Thread(){
          <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">run</span>() {
              handler.postDelayed(run, bhjg);

                handler1.postDelayed(run1, bhsj);
          };

      } .start();

    }
    Runnable run1 = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Runnable() {

        <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">run</span>() {
           <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(change)
           {
              musicImageView.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>.invalidate();

           }
           handler1.postDelayed(run1, bhsj);
        }
    };

    Runnable run = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Runnable() {

        <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">run</span>() {

            change=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;

            handler.postDelayed(run, bhjg);
        }
    };

    Handler handler1= <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Handler();
    Handler handler= <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Handler();
    <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onMeasure</span>(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> widthMeasureSpec, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> heightMeasureSpec) {

        Bitmap bmp=mbitmaps.get(backindex);

        setMeasuredDimension(bmp.getWidth(), bmp.getHeight());

    }   
    <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onDraw</span>(Canvas canvas) {

        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">super</span>.onDraw(canvas);
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(change)
        {

            Bitmap bmp=mbitmaps.get(frontindex);
            Bitmap bmp1=mbitmaps.get(backindex);

            count++;
             <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(bmp1.getHeight() - <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5</span>*count>=bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>)
             {

                 <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//绘制上半部分图像</span>
                 canvas.save();

                 canvas.clipRect( <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getWidth(), bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>);
                 canvas.drawBitmap(bmp1, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, paint);


                 canvas.restore();

                 <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//绘制下班部分图像</span>
                 canvas.save();

                 canvas.clipRect( <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>, bmp1.getWidth(), bmp1.getHeight());
                 canvas.drawBitmap(bmp, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, paint);


                 canvas.restore();

                 <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//动态改变下半部分图像</span>
                 <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">float</span>[] src = { <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                             bmp1.getWidth(), bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                             bmp1.getWidth(), bmp1.getHeight(),<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                             <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getHeight() }; 


                  henght=bmp1.getHeight() - <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5</span>*count;
                  <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">float</span>[] dst = { <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                         bmp1.getWidth(), bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                         bmp1.getWidth(), henght,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                          <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, henght };  

                  System.out.println(count+<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">""</span>);
                  canvas.save();
                  matrix.setPolyToPoly(src, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, dst, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, src.length >> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>); 

                  canvas.clipRect( <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>, bmp1.getWidth(), henght);
                  paint.setXfermode(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>);

                  paint.setXfermode(xfermode);

                  canvas.drawBitmap(bmp1,matrix, paint);
                  canvas.restore();
                  paint.setXfermode(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>);



             }
             <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span>{

                 <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//绘制上半部分图像</span>
                 canvas.save();

                 canvas.clipRect( <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getWidth(), bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>);
                 canvas.drawBitmap(bmp1, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, paint);


                 canvas.restore();
                 <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//绘制下班部分图像</span>
                 canvas.save();

                 canvas.clipRect( <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>, bmp1.getWidth(), bmp1.getHeight());
                 canvas.drawBitmap(bmp, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, paint);


                 canvas.restore();

                 <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//动态改变上半部分图像</span>
                 <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">float</span>[] src = { <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>,<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                             bmp1.getWidth(), <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                             bmp1.getWidth(), bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                             <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span> }; 


                  henght=bmp1.getHeight() - <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5</span>*count;

                  <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">float</span>[] dst = { <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, henght,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                         bmp1.getWidth(), henght,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                         bmp1.getWidth(), bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>,<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//  </span>
                         <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span> }; 

                  System.out.println(count+<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">""</span>);
                  canvas.save();
                  matrix.setPolyToPoly(src, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, dst, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, src.length >> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>); 

                  canvas.clipRect( <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, bmp1.getHeight()/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>, bmp1.getWidth(), henght);
                  paint.setXfermode(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>);

                  paint.setXfermode(xfermode);

                  canvas.drawBitmap(bmp,matrix, paint);
                  canvas.restore();
                  paint.setXfermode(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>);

                  <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(henght<=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>)
                  { <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//说明动画结束 重置动画参数</span>
                      count=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>;
                      change=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">false</span>;
                      <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> temp=frontindex;
                      frontindex=backindex;
                      backindex=temp;
                      System.out.println(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"change false"</span>);
                      bhjg=(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span>)(Math.random()*(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">8000</span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5000</span>))+<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5000</span>;
                      System.out.println(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"bhjg: "</span>+bhjg+<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">""</span>);
                  }

             }



        }
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span>{
            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(!setbitmap)
            {
                canvas.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.im2),  matrix, paint);
            }
        }



    }


}</code>