我有一个(a >= 10 and b>= 10 and c>=10) OR (a >= 10 and d>=10 and e >= 10)
,其中有一个Activity
和其他Fragment
。显示Views
时,它将显示为全屏(Fragment
)。我正在寻找的行为是将match_parent
向下拖动以将其最小化,因此它在Fragment
顶部以100dp
高度的浮动视图显示(请检查YouTube播放器动画是否为参考)。
此外,子视图是否需要更改位置取决于Activity
是全屏还是浮动迷你状态
由于我对高级视图动画几乎没有经验。很想获得一些有关如何实现此目标的参考或代码示例。
目前,我正在尝试使用Fragment
和GestureDetectorCompat
来实现这一点。
答案 0 :(得分:3)
您需要使用CoordinatorLayout和BottomSheetBehavior。
使用CoordinatorLayout作为活动容器,并将BottomSheetBehavior添加到片段容器中
活动代码示例:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/your_fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior" />
</android.support.design.widget.CoordinatorLayout>
使用FragmentManager从活动中打开下一个片段:
supportFragmentManager.beginTransaction().add(R.id.your_fragment_container, YourFragment(), null).commitAllowingStateLoss()
接下来添加到片段代码:
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
// get behavior from fragment container
val behavior = BottomSheetBehavior.from(view.parent as ViewGroup)!!
// listen change behavior state for change position of child views
behavior.setBottomSheetCallback(object : BottomSheetBehavior.BottomSheetCallback() {
override fun onStateChanged(bottomSheet: View, newState: Int) {
changeHeaderState(newState)
}
override fun onSlide(bottomSheet: View, slideOffset: Float) {
}
})
behavior.apply {
// init state
state = STATE_COLLAPSED
// doesn't hide your fragment on swipe down
isHideable = false
// height of the bottom sheet when it is collapsed.
peekHeight = view.resources.getDimensionPixelSize(R.id.floating_view_100dp)
}
onCollapsed()
}
private fun changeHeaderState(newState: Int) {
when (newState) {
STATE_COLLAPSED -> onCollapsed()
STATE_EXPANDED -> onExpanded()
}
}
private fun onCollapsed() {
// animate on collapse
}
private fun onExpanded() {
// animate on expand
}