/**
* @view 需要拖拽的view
* @data 拖拽需要携带的数据
*/
fun dragView(view: View,data:Any) {
var shadow = View.DragShadowBuilder(view)
ViewCompat.startDragAndDrop(view, null, shadow, data, 0)
}
下面是接受拖拽的区域的代码
layout.setOnDragListener { v, event ->
when (event?.action) {
DragEvent.ACTION_DRAG_ENTERED -> v.setBackgroundColor(GREEN)
DragEvent.ACTION_DRAG_EXITED -> v.setBackgroundColor(RED)
DragEvent.ACTION_DRAG_ENDED -> v.setBackgroundColor(WHITE)
DragEvent.ACTION_DROP -> {
val dropX = event.getX()
val dropY = event.getY()
val data = event.getLocalState()
var shape = ImageView(context)
shape.setImageResource(R.drawable.test)
var layoutParams = FrameLayout.LayoutParams(data.width, data.height)
layoutParams.marginStart = (dropX - data.width.toFloat() / 2).toInt()
layoutParams.topMargin = (dropY - data.height.toFloat() / 2).toInt()
ident_frame.addView(shape, layoutParams)
shape.setOnClickListener {
layout.removeView(it)
}
}
else -> {
}
}
true
}
- 注，event.getLocalState() 为生成 dragView 中的 data 一般会包括 dragView 的宽高等数据。
以上即可实现view拖拽。
