android.jpg
1、Demo预览
1.gif
2、动画实现
fun showOrHide(isShow: Boolean) {
isShowing = isShow
val valueAnimator: ValueAnimator = if (isShow) {
ValueAnimator.ofInt(0, (getScreenHeight() * 2f / 3f).toInt())
} else {
ValueAnimator.ofInt((getScreenHeight() * 2f / 3f).toInt(), 0)
}
valueAnimator.addUpdateListener { a ->
val value = a.animatedValue as Int
val params = loginBottomLayout.layoutParams
params.height = value
loginBottomLayout.layoutParams = params
Log.d("addUpdateListener", value.toString())
}
valueAnimator.duration = 500
valueAnimator.setTarget(loginBottomLayout)
valueAnimator.start()
}
3、下滑关闭
loginBottomLayout.setOnTouchListener(object : View.OnTouchListener {
var lastX: Float = -1F
var lastY: Float = -1F
override fun onTouch(view: View?, event: MotionEvent): Boolean {
when (event.action) {
MotionEvent.ACTION_DOWN -> {
lastY = event.y
lastX = event.x
Log.d("ACTION_DOWN", "x:$lastX,y:$lastY")
}
MotionEvent.ACTION_UP -> {
if (Math.abs(event.x - lastX) < 30 && event.y - lastY > 30) { //向下滑动逻辑，
if (isShowing)
showOrHide(false) //关闭登录或注册
}
Log.d("ACTION_UP", "x:${event.x},y:${event.y}")
}
}
return true
}
})
