launcher 长按拖动流程

阳光西西

于 2016-04-30 22:35:43 发布

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分类专栏：项目积累-Launcher2 文章标签： launcher

本文链接：https://blog.youkuaiyun.com/u013225534/article/details/51288372

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流程参考网址请点击

按钮移动会有较差的残影显示。去掉按钮移动时的残影。
Workspace.startDrag() -> createDragOutline()

createDragOutline(View v, Canvas canvas, int padding):
设置成透明的
private Bitmap createDragOutline(View v, Canvas canvas, int padding) {
        final int outlineColor = getResources().getColor(android.R.color.transparent);
        final Bitmap b = Bitmap.createBitmap(
                v.getWidth() + padding, v.getHeight() + padding, Bitmap.Config.ARGB_8888);
        canvas.setBitmap(b);
        drawDragView(v, canvas, padding, true);
        mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor);
        canvas.setBitmap(null);
        return b;
    }