一个新手指引的View
View guideView = LayoutInflater.from(this).inflate(R.layout.showcase_content_one, null, false);
View target = findViewById(R.id.target_one);
ShowCaseView showCaseView = new ShowCaseView.Builder(MainActivity.this)
.setLayoutController(new LayoutController(guideView))
.setShape(new CircleShape(this))
.build(target);
showCaseView.show(this);
showCaseView.hide();
setShape(IShape shape)
setLayoutController(ILayoutController layoutController)
setAnimationController(IAnimationController animationController)