bt.setOnTouchListener(object : OnTouchListener {
//上次view的坐标位置
internal var lastX: Int = 0
internal var lastY: Int = 0
var moveX = 0
var moveY = 0
var btnHeight = 0
var btnWith = 0
override fun onTouch(v: View, event: MotionEvent): Boolean {
// TODO Auto-generated method stub
val ea = event.action
Log.i("TAG", "Touch:$ea")
when (ea) {
MotionEvent.ACTION_DOWN -> {
//按下记录view坐标
lastX = event.rawX.toInt()
lastY = event.rawY.toInt()
btnHeight = bt.height
btnWith = bt.width
}
MotionEvent.ACTION_MOVE -> {
//移动时记录相对上次的坐标
val dx = event.rawX.toInt() - lastX
val dy = event.rawY.toInt() - lastY
moveX = dx
moveY = dy
//相对于parent 的View上下左右位置
var left = v.left dx
var top = v.top dy
var right = v.right dx
var bottom = v.bottom dy
//如果left < 0，则是左移，右边框上次位置加上左移部分
if (left < 0) {
left = 0
right = left v.width
}
//
if (right > screenWidth) {
right = screenWidth
left = right - v.width
}
//如果top < 0，则是上移，下边框上次位置加上移部分
if (top < 0) {
top = 0
bottom = top v.height
}
if (bottom > screenHeight) {
bottom = screenHeight
top = bottom - v.height
}
//重新layout
v.layout(left, top, right, bottom)
Log.i("", "position$left, $top, $right, $bottom")
lastX = event.rawX.toInt()
lastY = event.rawY.toInt()
}
MotionEvent.ACTION_UP -> {
isDrag = Math.abs(moveX) == 0 && Math.abs(moveY) == 0
// 向四周吸附
var dx1 = event.rawX - lastX
var dy1 =event.rawY - lastY
var left1 = v.left btnWith/2 dx1
var top1 = v.top dy1
var right1 = v .right dx1
var bottom1 = v .bottom dy1
if (left1 < (screenWidth / 2)) {
// when {
// top1 < 100 -> v.layout(left1.toInt(), 0, right1.toInt(), btnHeight)
// bottom1 > (screenHeight - 200) -> v.layout(left1.toInt(), (screenHeight - btnHeight), right1.toInt(), screenHeight)
// else ->
// v.layout(0, top1.toInt(), btnHeight, bottom1.toInt())
// }
v.layout(0, top1.toInt(), btnWith, bottom1.toInt())
} else {
// when {
// top1 < 100 -> v.layout(left1.toInt(), 0, right1.toInt(), btnHeight)
// bottom1 > (screenHeight - 200) -> v.layout(left1.toInt(), (screenHeight - btnHeight), right1.toInt(), screenHeight)
// else -> v.layout((screenWidth - btnHeight), top1.toInt(), screenWidth, bottom1.toInt())
// }
v.layout((screenWidth - btnWith), top1.toInt(), screenWidth, bottom1.toInt())
}
}
}
return false
}
})以上就是 PHP短视频源码，按钮拖拽相关的代码，更多内容欢迎关注之后的文章
