AndroidTagGroup实现云标签效果，各种背景效果的标签，并且支持添加，
大体实现：有一个TagsManager管理TagGroup，自定义TagGroup，对TagGroup设置setTags(tags);
TagGroup extends ViewGroup，TagGroup 由多个TagView组成，TagView继承TextView 。
主要绘制代码如下：
?? @Override
??????? protected void onDraw(Canvas canvas) {
??????????? canvas.drawArc(mLeftCornerRectF, -180, 90, true, mBackgroundPaint);
??????????? canvas.drawArc(mLeftCornerRectF, -270, 90, true, mBackgroundPaint);
??????????? canvas.drawArc(mRightCornerRectF, -90, 90, true, mBackgroundPaint);
??????????? canvas.drawArc(mRightCornerRectF, 0, 90, true, mBackgroundPaint);
??????????? canvas.drawRect(mHorizontalBlankFillRectF, mBackgroundPaint);
??????????? canvas.drawRect(mVerticalBlankFillRectF, mBackgroundPaint);
??????????? if (isChecked) {
??????????????? canvas.save();
??????????????? canvas.rotate(45, mCheckedMarkerBound.centerX(), mCheckedMarkerBound.centerY());
??????????????? canvas.drawLine(mCheckedMarkerBound.left, mCheckedMarkerBound.centerY(),
??????????????????????? mCheckedMarkerBound.right, mCheckedMarkerBound.centerY(), mCheckedMarkerPaint);
??????????????? canvas.drawLine(mCheckedMarkerBound.centerX(), mCheckedMarkerBound.top,
??????????????????????? mCheckedMarkerBound.centerX(), mCheckedMarkerBound.bottom, mCheckedMarkerPaint);
??????????????? canvas.restore();
??????????? }
??????????? canvas.drawPath(mBorderPath, mBorderPaint);
??????????? super.onDraw(canvas);
??????? }
?
运行效果：
