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ExpandableStackView
class ExpandableStackView @JvmOverloads constructor(
context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
) : MotionLayout(context, attrs, defStyleAttr) {
fun setAdapter(adapter: BaseAdapter) {
val scene = MotionScene(this)
val startSetId = View.generateViewId()
val startSet = ConstraintSet()
startSet.clone(this)
val endSetId = View.generateViewId()
val endSet = ConstraintSet()
endSet.clone(this)
val transitionId = View.generateViewId()
val transaction = TransitionBuilder.buildTransition(
scene,
transitionId,
startSetId, startSet,
endSetId, endSet
)
transaction.duration = 1000
scene.addTransition(transaction)
scene.setTransition(transaction)
setScene(scene)
setTransition(transitionId)
}
private fun boundTwoViewEnd(
constraintSet: ConstraintSet,
firstView: View,
secondView: View
) {
constraintSet.connect(
secondView.id,
ConstraintSet.TOP,
firstView.id,
ConstraintSet.BOTTOM,
fromDpToPx(16).toInt()
)
}
private fun boundTwoViewStart(
constraintSet: ConstraintSet,
firstView: View,
secondView: View,
marginBottom: Int
) {
constraintSet.connect(
secondView.id,
ConstraintSet.TOP,
firstView.id,
ConstraintSet.TOP,
marginBottom
)
}
private fun connectViewToParent(
constraintSet: ConstraintSet,
firstView: View
) {
constraintSet.connect(
firstView.id,
ConstraintSet.START,
ConstraintSet.PARENT_ID,
ConstraintSet.START
)
constraintSet.connect(
firstView.id,
ConstraintSet.END,
ConstraintSet.PARENT_ID,
ConstraintSet.END
)
}
}
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