弧形菜单2(动画渐入+Kotlin开发)
前言：基于AndroidStudio的采用Kotlin语言开发的动画渐入的弧形菜单......
效果:
开发环境：AndroidStudio2.2.1+gradle-2.14.1
涉及知识：1.自定义控件，2.事件分发等
部分代码：
Activity:
class HomepageActivity : AppCompatActivity() {
private var homePageMenuLayout: HomePageMenuLayout? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.homepage_layout)
initLayout()
}
private fun initLayout() {
homePageMenuLayout = findViewById(R.id.homepage_layout) as HomePageMenuLayout
//加载菜单列表
homePageMenuLayout!!.setMenuItemIconsAndTexts(Constants.MENUALL)
//才点动画初始
SwitchAnimationUtil().startAnimation(homePageMenuLayout!!, SwitchAnimationUtil.AnimationType.ROTATE)
//事件监听
homePageMenuLayout!!.setOnMenuItemClickListener(object : HomePageMenuLayout.OnMenuItemClickListener {
override fun itemClick(view: View, pos: Int) {
Toast.makeText(this@HomepageActivity, Constants.MENUALL[pos], Toast.LENGTH_SHORT).show()
}
})
}
}
动画类：
/**
* 菜单动画加载类
*/
class SwitchAnimationUtil {
private var mOrderIndex = 0
private val mDelay = 80
private val mDuration = 500 fun startAnimation(root: View, type: AnimationType) {
bindAnimation(root, 0, type)
} private fun bindAnimation(view: View, depth: Int, type: AnimationType) { if (view is ViewGroup) {
val group = view for (i in 0..group.childCount - 1) {
bindAnimation(group.getChildAt(i), depth + 1, type)
} } else {
runAnimation(view, (mDelay * mOrderIndex).toLong(), type)
mOrderIndex++
}
} private fun runAnimation(view: View, delay: Long, type: AnimationType) {
when (type) {
SwitchAnimationUtil.AnimationType.ROTATE -> runRotateAnimation(view, delay)
SwitchAnimationUtil.AnimationType.ALPHA -> runAlphaAnimation(view, delay)
else -> {
}
}
} private fun runAlphaAnimation(view: View, delay: Long) {
view.alpha = 0f
val objectAnimator = ObjectAnimator.ofFloat(view, "alpha", 0f, 1f)
objectAnimator.startDelay = delay
objectAnimator.duration = mDuration.toLong()
objectAnimator.interpolator = LinearInterpolator()
objectAnimator.start()
} private fun runRotateAnimation(view: View, delay: Long) {
view.alpha = 0f
val set = AnimatorSet()
val objectAnimator = ObjectAnimator.ofFloat(view, "rotation", 0f, 0f)
val objectAnimator2 = ObjectAnimator.ofFloat(view, "scaleX", 0f, 1f)
val objectAnimator3 = ObjectAnimator.ofFloat(view, "scaleY", 0f, 1f)
val objectAnimator4 = ObjectAnimator.ofFloat(view, "alpha", 0f, 1f) objectAnimator2.interpolator = AccelerateInterpolator(1.0f)
objectAnimator3.interpolator = AccelerateInterpolator(1.0f) set.duration = mDuration.toLong()
set.playTogether(objectAnimator, objectAnimator2, objectAnimator3, objectAnimator4)
set.startDelay = delay
set.start()
} enum class AnimationType {
ALPHA, ROTATE
}
}