这篇文章将为大家详细讲解有关如何使用Kotlin自定义菜单控件，文章内容质量较高，因此小编分享给大家做个参考，希望大家阅读完这篇文章后对相关知识有一定的了解。
思路：菜单控件分两部分，一是点击的子按钮（RecordButton），二是包裹着子按钮的容器（RecordMenu）。
子按钮负责显示文字及背景颜色和点击事件，父容器主要控制子控件的位置和动画显示。
实现：
子按钮，先贴代码
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class RecordButton : RelativeLayout {
/** 控件显示的文本*/
lateinit var textValue: String
/** 控件显示的文本字体大小*/
private var textSize: Float = 18f
/** 控件显示的文本字体颜色*/
private var textColor: Int = Color.BLACK
/** 控件按下时显示的文本字体颜色*/
private var textColorPress: Int = Color.WHITE
/** 控件显示的背景颜色*/
private var backColorNormal: Int = R.drawable.bg_menu_item
/** 控件按下时显示的背景颜色*/
private var backColorPress: Int = R.drawable.bg_menu_item_press
/** 控件是否是主按钮*/
var isSwitchMain: Boolean = false
/** 按钮按下时的时间*/
var pressBtnTime: Long = 0L
/** 按钮抬起时的时间*/
var upBtnTime: Long = 0L
/** 事件是否是点击事件*/
var isClick: Boolean = false
/** 点击事件是否打开*/
var isOpen: Boolean = false
/** 文本控件*/
private lateinit var textView: TextView
/** 监听事件*/
var onRecordItemClickListener: OnRecordItemClickListener? = null
constructor(context: Context,
textValue: String,
textSize: Float,
textColor: Int,
backColorNormal: Int,
textColorPress: Int,
backColorPress: Int) : this(context) {
this.textValue = textValue
this.textSize = textSize
this.textColor = textColor
this.backColorNormal = backColorNormal
this.isSwitchMain = isSwitchMain
this.textColorPress = textColorPress
this.backColorPress = backColorPress
setBackgroundResource(backColorNormal)
textView = TextView(context)
textView.text = textValue
textView.gravity = CENTER
textView.setTextColor(textColor)
textView.textSize = textSize
var ll = LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)
ll.addRule(CENTER_IN_PARENT)
addView(textView, ll)
}
constructor(context: Context) : this(context, null) {
}
constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0) {
}
constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
}
override fun onTouchEvent(event: MotionEvent?): Boolean {
when (event?.action) {
MotionEvent.ACTION_DOWN -> {
pressBtnTime = System.currentTimeMillis()
setBackgroundResource(backColorPress)
textView.setTextColor(textColorPress)
return true
}
MotionEvent.ACTION_MOVE -> {
}
MotionEvent.ACTION_UP -> {
upBtnTime = System.currentTimeMillis()
setBackgroundResource(backColorNormal)
textView.setTextColor(textColor)
isClick = (upBtnTime - pressBtnTime) / 1000 < 0.5
}
}
if (isClick) {
onRecordItemClickListener?.onClick(isSwitchMain, textValue,isOpen)
isOpen = !isOpen
}
return true
}
}这里主要用一个RelativeLayout包裹着一个TextView，这么写是为了防止以后扩展，需要添加图片什么的，关于这个样式和显示没什么好说的，主要的就是点击事件，在触摸事件中判断按下和抬起的时间差，如果时间差小于0.5秒则断定为点击。
包裹容器
class RecordMenu : RelativeLayout{
/** 子按钮半径*/
private var itemRadius: Int = 0
/*** 按钮间距*/
private var itemMargin: Int = 0
/** 动画时间*/
private var duration: Long = 0
/** 字体大小*/
private var itemFontSize = 18f
/** 字体正常颜色*/
private var itemFontColorN = Color.BLACK
/** 点击时字体颜色*/
private var itemFontColorP = Color.WHITE
/** 按钮正常背景*/
private var itemBackDrawableN = R.drawable.bg_menu_item
/** 按钮点击背景*/
private var itemBackDrawableP = R.drawable.bg_menu_item_press
/** 是否是展开状态*/
private var isOpen: Boolean = false
/** 动画是否正在运行*/
private var isRun: Boolean = false
/** 子控件监听*/
private var recordListener = RecordListener()
/** 上一级的监听事件*/
var onRecordItemClickListener: OnRecordItemClickListener? = null
constructor(context: Context):this(context,null){
}
constructor(context: Context, attrs: AttributeSet?) : this(context,attrs,0) {
}
constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs,defStyleAttr) {
init(context, attrs)
}
override fun onLayout(change: Boolean, l: Int, t: Int, r: Int, b: Int) {
/** 画出每个子控件的位置*/
for (i in 0 until childCount) {
var recordButton = getChildAt(i) as RecordButton
var left: Int = 0
var right: Int = itemRadius * 2
var top: Int = (childCount - 1) * (itemRadius * 2 + itemMargin) + itemRadius
var bottom: Int = top + itemRadius * 2
recordButton.layout(left, top, right, bottom)
}
}
override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
var width = itemRadius * 2
var height = (childCount - 1) * (itemRadius * 2 + itemMargin) + itemRadius * 2 + itemRadius
width += paddingLeft + paddingRight
height += paddingTop + paddingBottom
val count = childCount
for (i in 0 until count) {
getChildAt(i).measure(width, width)
if(i == count-1){
var recordButton = getChildAt(i) as RecordButton
recordButton.isSwitchMain = true
}
}
setMeasuredDimension(width, height)
}
private fun init(context: Context, attrs: AttributeSet?) {
val typedArray = context.obtainStyledAttributes(attrs, R.styleable.RecordMenu)
itemRadius = typedArray.getDimension(R.styleable.RecordMenu_itemRadius, 30f).toInt()
itemMargin = typedArray.getDimension(R.styleable.RecordMenu_itemMargin, 10f).toInt()
duration = typedArray.getInteger(R.styleable.RecordMenu_animDuration, 2000).toLong()
itemFontSize = typedArray.getDimension(R.styleable.RecordMenu_itemFontSize,18f)
itemFontColorN = typedArray.getColor(R.styleable.RecordMenu_itemFontColorN,Color.BLACK)
itemFontColorP = typedArray.getColor(R.styleable.RecordMenu_itemFontColorP,Color.WHITE)
itemBackDrawableN = typedArray.getResourceId(R.styleable.RecordMenu_itemBackDrawableN,R.drawable.bg_menu_item)
itemBackDrawableP = typedArray.getResourceId(R.styleable.RecordMenu_itemBackDrawableP,R.drawable.bg_menu_item_press)
}
fun addItemView(textValue: String){
var recordButton = RecordButton(context,textValue,itemFontSize,itemFontColorN,itemBackDrawableN,itemFontColorP,itemBackDrawableP)
var l1 = LayoutParams(itemRadius * 2, itemRadius * 2)
addView(recordButton, l1)
recordButton.onRecordItemClickListener = recordListener
}
fun addItemView(textValue: String,itemBackDrawableN:Int,itemBackDrawableP:Int){
var recordButton = RecordButton(context,textValue,itemFontSize,itemFontColorN,itemBackDrawableN,itemFontColorP,itemBackDrawableP)
var l1 = LayoutParams(itemRadius * 2, itemRadius * 2)
addView(recordButton, l1)
recordButton.onRecordItemClickListener = recordListener
}
inner class RecordListener : OnRecordItemClickListener {
override fun onClick(isSwitch: Boolean, textValue: String,isOpen1:Boolean) {
if (!isRun) {
if (!isOpen) {
openMenu()
} else {
closeMenu()
}
}
onRecordItemClickListener?.onClick(isSwitch,textValue,isOpen1)
}
}
/**
* 展开控件
*/
fun openMenu() {
isOpen = true
isRun = true
for (i in 0 until childCount) {
buttonItemOpenAnimation(i, getChildAt(i) as RecordButton)
}
}
/**
* 关闭控件
*/
fun closeMenu() {
isRun = true
isOpen = false
for (i in 0 until childCount) {
buttonItemCloseAnimation(i, getChildAt(i) as RecordButton)
}
}
/**
* 展开动画
*/
private fun buttonItemOpenAnimation(index: Int, view: RecordButton) {
if (!view.isSwitchMain) {
val propertyAnimator = view.animate().alpha(1f).setInterpolator(OvershootInterpolator()).setDuration(duration / 3)
propertyAnimator.y((itemRadius * 2 * index + itemMargin * index + itemRadius).toFloat())
if (isOpen) {
view.visibility = View.VISIBLE
}
propertyAnimator.setListener(object : Animator.AnimatorListener {
override fun onAnimationRepeat(p0: Animator?) {
}
override fun onAnimationCancel(p0: Animator?) {
}
override fun onAnimationEnd(p0: Animator?) {
if (index == childCount - 2) {
isRun = false
}
}
override fun onAnimationStart(p0: Animator?) {
}
})
propertyAnimator.start()
}
}
/**
* 关闭动画
*/
private fun buttonItemCloseAnimation(index: Int, view: RecordButton) {
if (!view.isSwitchMain) {
val propertyAnimator = view.animate().alpha(0f).setDuration(duration / 3)
propertyAnimator.y(((itemRadius * 2 + itemMargin) * (childCount - 1) + itemRadius).toFloat())
propertyAnimator.setListener(object : Animator.AnimatorListener {
override fun onAnimationStart(animation: Animator) {}
override fun onAnimationEnd(animation: Animator) {
if (index == childCount - 2) {
isRun = false
}
if (!isOpen) {
view.visibility = View.GONE
}
}
override fun onAnimationCancel(animation: Animator) {}
override fun onAnimationRepeat(animation: Animator) {}
})
propertyAnimator.start()
}
}
}关于如何使用Kotlin自定义菜单控件就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。
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