我的应用程序使用继承Theme.MaterialComponents.Light.NoActionBar
的应用程序主题。当用户选择列表项并进入上下文操作模式时,我想将操作栏更改为深灰色。我使用以下代码来实现相同的目的:
在themes.xml
中:
<item name="windowActionModeOverlay">true</item>
<item name="actionModeStyle">@style/Widget.App.ActionMode</item>
<item name="actionModeCloseDrawable">@drawable/ic_close_24dp</item>
<item name="actionBarTheme">@style/ThemeOverlay.MaterialComponents.Dark.ActionBar</item>
在styles.xml
中:
<style name="Widget.App.ActionMode" parent="Widget.AppCompat.ActionMode">
<item name="background">@color/grey_100</item>
</style>
在我的 fragment 中:
val callback = object: ActionMode.Callback {
override fun onCreateActionMode(mode: ActionMode?, menu: Menu?): Boolean {
requireActivity().menuInflater.inflate(R.menu.contextual_action_bar, menu)
return true
}
override fun onPrepareActionMode(mode: ActionMode?, menu: Menu?): Boolean {return false}
override fun onActionItemClicked(mode: ActionMode?, item: MenuItem?): Boolean {return false}
override fun onDestroyActionMode(mode: ActionMode?) {}
}
val actionMode = requireActivity().startActionMode(callback)
actionMode?.title = "1 selected"
使用这段代码,我得到以下结果:
我们如何更改此代码,以便它也更改状态栏背景和图标颜色?以下示例展示了有多少应用(包括 Google 文件应用)执行此操作:
注意它如何正确更改状态栏背景颜色以及相应的图标颜色。
我已经尝试过this答案,但它并没有像许多用户评论的那样实现平稳过渡。是否有任何标准方法可以实现所需的行为?
最佳答案
当上下文操作栏(CAB)显示/隐藏时有两个请求:
- 切换状态栏图标灯光模式。
- 同步 CAB 和状态栏之间的颜色动画。
在 CAB 和状态栏之间同步颜色动画
您可以使用 ArgbEvaluator
为状态栏颜色的变化设置动画,并调整持续时间,该持续时间趋于 CAB 持续时间(经过反复试验,它接近 300 毫秒;我没有确切的文档线索值,但您可以根据需要进行调整):
fun switchStatusColor(colorFrom: Int, colorTo: Int, duration: Long) {
val colorAnimation = ValueAnimator.ofObject(ArgbEvaluator(), colorFrom, colorTo)
colorAnimation.duration = duration // milliseconds
colorAnimation.addUpdateListener { animator ->
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
window.statusBarColor = animator.animatedValue as Int
}
colorAnimation.start()
}
并且需要在 onCreateActionMode
和 onDestroyActionMode
中使用适当的颜色来调用:
val callback = object : ActionMode.Callback {
override fun onCreateActionMode(mode: ActionMode?, menu: Menu?): Boolean {
menuInflater.inflate(R.menu.contextual_action_bar, menu)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
switchStatusColor(
window.statusBarColor,
ContextCompat.getColor(this@MainActivity, R.color.grey_100), 300
)
}
return true
}
override fun onPrepareActionMode(mode: ActionMode?, menu: Menu?): Boolean {
return false
}
override fun onActionItemClicked(mode: ActionMode?, item: MenuItem?): Boolean {
return false
}
override fun onDestroyActionMode(mode: ActionMode?) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
switchStatusColor(
window.statusBarColor,
ContextCompat.getColor(this@MainActivity, R.color.white), 300
)
}
}
}
切换状态栏图标灯光模式
对于低于 30 的 API 级别 (Android R),请使用 systemUiVisibility
,对于 API 级别 30 及以上,请使用 WindowInsetsController
:
由于某种原因,WindowInsetsController
对我不起作用,即使使用以下 4 个版本也是如此,但幸运的是旧标志可以工作,所以我将其保持在 API 级别 > 30:
private fun switchStatusBarIconLight(isLight: Boolean) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
window.insetsController?.setSystemBarsAppearance(
if (isLight) APPEARANCE_LIGHT_STATUS_BARS else 0,
APPEARANCE_LIGHT_STATUS_BARS
)
WindowInsetsControllerCompat(
window,
window.decorView
).isAppearanceLightStatusBars =
isLight
ViewCompat.getWindowInsetsController(window.decorView)?.apply {
isAppearanceLightStatusBars = isLight
}
WindowCompat.getInsetsController(
window,
window.decorView
)?.isAppearanceLightStatusBars = isLight
window.decorView.systemUiVisibility =
if (isLight) View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR else 0 // Deprecated in API level 30 // but only works than the above
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (isLight) View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR else 0 // Deprecated in API level 30
}
}
所以,工作演示:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// Setting up the status bar when the app starts
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
window.statusBarColor = ContextCompat.getColor(this@MainActivity, R.color.white)
switchStatusBarIconLight(true)
val callback = object : ActionMode.Callback {
override fun onCreateActionMode(mode: ActionMode?, menu: Menu?): Boolean {
menuInflater.inflate(R.menu.contextual_action_bar, menu)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
switchStatusColor(
window.statusBarColor,
ContextCompat.getColor(this@MainActivity, R.color.grey_100), 300
)
}
switchStatusBarIconLight(false)
return true
}
override fun onPrepareActionMode(mode: ActionMode?, menu: Menu?): Boolean {
return false
}
override fun onActionItemClicked(mode: ActionMode?, item: MenuItem?): Boolean {
return false
}
override fun onDestroyActionMode(mode: ActionMode?) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
switchStatusColor(
window.statusBarColor,
ContextCompat.getColor(this@MainActivity, R.color.white), 300
)
}
switchStatusBarIconLight(true)
}
}
}
*
* Animate switching the color of the status bar from the colorFrom color to the colorTo color
* duration: animation duration.
* */
private fun switchStatusColor(colorFrom: Int, colorTo: Int, duration: Long) {
val colorAnimation = ValueAnimator.ofObject(ArgbEvaluator(), colorFrom, colorTo)
colorAnimation.duration = duration // milliseconds
colorAnimation.addUpdateListener { animator ->
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
window.statusBarColor = animator.animatedValue as Int
}
colorAnimation.start()
}
/*
* Switch the dark mode of the status bar icons
* When isLight is true, the status bar icons will turn light
* */
private fun switchStatusBarIconLight(isLight: Boolean) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
window.insetsController?.setSystemBarsAppearance(
if (isLight) APPEARANCE_LIGHT_STATUS_BARS else 0,
APPEARANCE_LIGHT_STATUS_BARS
)
WindowInsetsControllerCompat(
window,
window.decorView
).isAppearanceLightStatusBars =
isLight
ViewCompat.getWindowInsetsController(window.decorView)?.apply {
isAppearanceLightStatusBars = isLight
}
WindowCompat.getInsetsController(
window,
window.decorView
)?.isAppearanceLightStatusBars = isLight
window.decorView.systemUiVisibility =
if (isLight) View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR else 0 // Deprecated in API level 30 // but only works than the above
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (isLight) View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR else 0 // Deprecated in API level 30
}
}
}
预览:
更新
另一种方法
您可以禁用动画,而不是设置状态栏动画以与 CAB 同步。但这要求您使用 CAB 的自定义 View 而不是菜单。
有两个地方可以做到这一点:
当显示 CAB 时
每当调用
startSupportActionMode
时执行此操作:
val mode = startSupportActionMode(callback)
ViewCompat.animate(mode?.customView?.parent as View).alpha(0f)
当 CAB 隐藏时:
在
onDestroyActionMode
中执行
override fun onDestroyActionMode(mode: ActionMode?) {
// Hiding the CAB
(mode?.customView?.parent as View).visibility = View.GONE
}
缺点是不再有动画,并且显示 CAB 会有延迟,因为它只是使用 Alpha 隐藏,因此动画仍然会被消耗,但由于设置了 Alpha 而不可见。这需要您在延迟一段时间后切换状态栏颜色,在第一种方法中假设为 300 毫秒:
val callback = object : ActionMode.Callback {
override fun onCreateActionMode(mode: ActionMode?, menu: Menu?): Boolean {
val customView: View = LayoutInflater.from(this@MainActivity).inflate(
R.layout.custom_contextual_action_bar, null
)
mode?.customView = customView
Handler(Looper.getMainLooper()).postDelayed({
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
window.statusBarColor =
ContextCompat.getColor(this@MainActivity, R.color.grey_100)
switchStatusBarIconLight(false)
}
}, 300)
return true
}
override fun onPrepareActionMode(mode: ActionMode?, menu: Menu?): Boolean {
return false
}
override fun onActionItemClicked(mode: ActionMode?, item: MenuItem?): Boolean {
return false
}
override fun onDestroyActionMode(mode: ActionMode?) {
// Hiding the CAB
(mode?.customView?.parent as View).visibility = View.GONE
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
window.statusBarColor =
ContextCompat.getColor(this@MainActivity, R.color.white)
switchStatusBarIconLight(true)
}
}
}
// Call:
val mode = startSupportActionMode(callback)
ViewCompat.animate(mode?.customView?.parent as View).alpha(0f)
关于android - 如何在进入上下文操作模式时更改状态栏颜色,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/68842523/