求launcher showPreviews代码一份

[img=http://image.baidu.com/i?ct=503316480&z=0&tn=baiduimagedetail&word=go+launcher&in=31696&cl=2&lm=-1&pn=23&rn=1&di=263773005&ln=2000&fr=&fmq=&ic=0&s=0&se=1&sme=0&tab=&width=&height=&face=0&is=&istype=2#pn23&-1&di263773005&objURLhttp%3A%2F%2Fwww.androidmi.com%2Fuploadfile%2F2010%2F1205%2F20101205122004629.jpg&fromURLhttp%3A%2F%2Fwww.androidmi.com%2Fxz%2Fcyrj%2Fzhuomian%2F201012%2Fgo-launcher.html&W360&H641][/img] --------------------编程问答--------------------    跟go Launcher 屏幕预览效果差不多. --------------------编程问答-------------------- 没明白你的问题！呵呵不是一个桌面运用啊 --------------------编程问答--------------------    呵呵  不要小看了，用过go Launcher没？大致跟它那种浏览screen 差不多，可以增加screen 也可以删除 --------------------编程问答-------------------- --------------------编程问答-------------------- private void showPreviews(final View anchor, int start, int end)
{
        final Resources resources = getResources();
        final lhkworkspace workspace = mWorkspace;
        System.out.println("end=" +end);
        CellLayout cell = ((CellLayout) workspace.getChildAt(start));

        float max = workspace.getChildCount();

        final Rect r = new Rect();//8*6
        resources.getDrawable(R.drawable.preview_background).getPadding(r);
        int extraW = (int) ((r.left + r.right) * max); //40
        int extraH = r.top + r.bottom; //6
        System.out.println("extraW=" +extraW);
        System.out.println("extraH=" +extraH);

        int aW = cell.getWidth() - extraW;
        System.out.println("cell.getWidth()=" +cell.getWidth());//0
        float w = aW / max;

        int width = cell.getWidth();
        int height = cell.getHeight();
        System.out.println("cell.getHeight()=" +cell.getHeight());//0
        int x = cell.getLeftPadding();//6
        int y = cell.getTopPadding();//0
        System.out.println("x=" +x);
        System.out.println("y=" +y);
        width -= (x + cell.getRightPadding());
        height -= (y + cell.getBottomPadding());
        System.out.println("cell.getRightPadding()=" +cell.getRightPadding());//59
        System.out.println("cell.getBottomPadding()=" +cell.getBottomPadding());//0

        float scale = w / width;

        int count = end - start;

        final float sWidth = width * scale;
        float sHeight = height * scale;

        LinearLayout preview = new LinearLayout(this);

        PreviewTouchHandler handler = new PreviewTouchHandler(anchor);
        ArrayList<Bitmap> bitmaps = new ArrayList<Bitmap>(count);
        System.out.println(sWidth);
        System.out.println(sHeight);
        for (int i = start; i < end; i++)
        {
            ImageView image = new ImageView(this);
            cell = (CellLayout) workspace.getChildAt(i);

            final Bitmap bitmap = Bitmap.createBitmap((int) 30, (int) 40,
                    Bitmap.Config.ARGB_8888);

            final Canvas c = new Canvas(bitmap);
            c.scale(scale, scale);
            c.translate(-cell.getLeftPadding(), -cell.getTopPadding());
            cell.dispatchDraw(c);

            image.setBackgroundDrawable(resources.getDrawable(R.drawable.preview_background));
            image.setImageBitmap(bitmap);
            image.setTag(i);
            image.setOnClickListener(handler);
            image.setOnFocusChangeListener(handler);
            image.setFocusable(true);
            if (i == mWorkspace.getCurrentScreen()) image.requestFocus();

            preview.addView(image,
                    LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);

            bitmaps.add(bitmap);
        }

        final PopupWindow p = new PopupWindow(this);
        p.setContentView(preview);
        p.setWidth((int) (200));
        p.setHeight((int) (40));
        p.setAnimationStyle(R.style.AnimationPreview);
        p.setOutsideTouchable(true);
        p.setFocusable(true);
        p.setBackgroundDrawable(new ColorDrawable(0));
        p.showAsDropDown(anchor, 0, 0);

        p.setOnDismissListener(new PopupWindow.OnDismissListener()
        {
            public void onDismiss()
            {
                dismissPreview(anchor);
            }
        });

        anchor.setTag(p);
        anchor.setTag(R.id.workspace, preview);
        anchor.setTag(R.id.icon, bitmaps);
    }

补充：移动开发 ,  Android