Android: 如何正确隐藏系统 UI
Android: How to hide the System UI properly
我正在开发一个视频播放器应用程序，但遇到了一个问题。我有一个包含全屏按钮的自定义视频控制器，我想在用户进入全屏模式时隐藏系统 UI（导航栏和状态栏）。我试过做类似 this 的事情，但它不能正常工作。我的申请就像下面的截图：
当我单击全屏按钮时，我将方向更改为横向并隐藏了系统 UI，但我的播放器没有全屏。看起来像下面的屏幕：
此外，当我点击屏幕时我想显示我的视频控制器，但是系统 UI 显示以下内容，而不是：
那么，我该如何实现这种行为呢？以下是我的全屏和 hiding/showing 系统 UI:
方法
@Override
public void toggleFullscreen() {
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) mVideoContainer.getLayoutParams();
if (!mFullscreen) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
hideSystemUI();
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
params.width = metrics.widthPixels;
params.height = metrics.heightPixels;
params.setMargins(0, 0, 0, 0);
} else {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
showSystemUI();
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
params.width = metrics.widthPixels;
params.height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 300, metrics);
params.setMargins(0, 0, 0, 0);
}
mVideoContainer.setLayoutParams(params);
mFullscreen = !mFullscreen;
}
private void hideSystemUI() {
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
if (Build.VERSION.SDK_INT < 16) {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN)
} else {
uiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
}
decorView.setSystemUiVisibility(uiOptions);
}
private void showSystemUI() {
View decorView = getWindow().getDecorView();
decorView.setSystemUiVisibility(0);
}
这是我的布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/video_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:id="@+id/videoSurfaceContainer"
android:layout_width="match_parent"
android:layout_height="300dp" >
<SurfaceView
android:id="@+id/videoSurface"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
</LinearLayout>
我在每个要隐藏导航栏和状态栏的 activity 中包含这个：
public void hideToolBr(){
// BEGIN_INCLUDE (get_current_ui_flags)
// The UI options currently enabled are represented by a bitfield.
// getSystemUiVisibility() gives us that bitfield.
int uiOptions = getWindow().getDecorView().getSystemUiVisibility();
int newUiOptions = uiOptions;
// END_INCLUDE (get_current_ui_flags)
// BEGIN_INCLUDE (toggle_ui_flags)
boolean isImmersiveModeEnabled =
((uiOptions | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY) == uiOptions);
if (isImmersiveModeEnabled) {
Log.i(Constants.TAG_DEF, "Turning immersive mode mode off. ");
} else {
Log.i(Constants.TAG_DEF, "Turning immersive mode mode on.");
}
// Navigation bar hiding: Backwards compatible to ICS.
if (Build.VERSION.SDK_INT >= 14) {
newUiOptions ^= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
}
// Status bar hiding: Backwards compatible to Jellybean
if (Build.VERSION.SDK_INT >= 16) {
newUiOptions ^= View.SYSTEM_UI_FLAG_FULLSCREEN;
}
// Immersive mode: Backward compatible to KitKat.
// Note that this flag doesn't do anything by itself, it only augments the behavior
// of HIDE_NAVIGATION and FLAG_FULLSCREEN. For the purposes of this sample
// all three flags are being toggled together.
// Note that there are two immersive mode UI flags, one of which is referred to as "sticky".
// Sticky immersive mode differs in that it makes the navigation and status bars
// semi-transparent, and the UI flag does not get cleared when the user interacts with
// the screen.
if (Build.VERSION.SDK_INT >= 18) {
newUiOptions ^= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
}
getWindow().getDecorView().setSystemUiVisibility(newUiOptions);
//END_INCLUDE (set_ui_flags)
}
然后在我的 activity 的 onCreate 方法中，我在 setContentView()
之后调用它
hideToolBr();
然后用户所要做的就是从底部向上滑动或从顶部向下滑动以调出状态栏或导航栏。 Google 称之为 "immersive mode"。它使开发人员可以充分利用设备的屏幕空间。
取自 Google 沉浸式模式示例，调用此显示系统 UI:
// This snippet shows the system bars. It does this by removing all the flags
// except for the ones that make the content appear under the system bars.
private void showSystemUI() {
mDecorView.setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}
您可以找到更多信息here。
编辑：
也将此添加到您的 styles.xml
<style name="YourTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<item name="android:colorForeground">@color/colorPrimaryDark</item>
</style>
转到
https://developer.android.com/training/system-ui/immersive
他们对这个系统的解释非常到位。
并在您的 activity 主题
中添加以下样式
<style name="BlackActionTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/black</item>
<item name="colorPrimaryDark">@color/black</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowActionBar">false</item>
</style>
当你想hide/show系统UI时调用这些方法即可。
private void hideSystemUI() {
View decorView = getActivity().getWindow().getDecorView();
int uiOptions = decorView.getSystemUiVisibility();
int newUiOptions = uiOptions;
newUiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
newUiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
newUiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
newUiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE;
newUiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
decorView.setSystemUiVisibility(newUiOptions);
}
private void showSystemUI() {
View decorView = getActivity().getWindow().getDecorView();
int uiOptions = decorView.getSystemUiVisibility();
int newUiOptions = uiOptions;
newUiOptions &= ~View.SYSTEM_UI_FLAG_LOW_PROFILE;
newUiOptions &= ~View.SYSTEM_UI_FLAG_FULLSCREEN;
newUiOptions &= ~View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
newUiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE;
newUiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
decorView.setSystemUiVisibility(newUiOptions);
}
**For Kotlin:**
private fun hideSystemUI() {
val decorView: View = this.window.decorView
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
window.setDecorFitsSystemWindows(false)
} else {
val uiOptions = decorView.systemUiVisibility
var newUiOptions = uiOptions
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_LOW_PROFILE
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_FULLSCREEN
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_IMMERSIVE
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
decorView.systemUiVisibility = newUiOptions
}
}
private fun showSystemUI() {
val decorView: View = this.window.decorView
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
window.setDecorFitsSystemWindows(true)
} else {
val uiOptions = decorView.systemUiVisibility
var newUiOptions = uiOptions
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_LOW_PROFILE.inv()
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_FULLSCREEN.inv()
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_HIDE_NAVIGATION.inv()
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_IMMERSIVE.inv()
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY.inv()
decorView.systemUiVisibility = newUiOptions
}
}
在 API 版本 30 (R) 中设置 window.decorView.systemUiVisibility 已弃用。使用 window.insetsController 代替：
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
window.insetsController?.let {
it.systemBarsBehavior = WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
window.navigationBarColor = getColor(R.color.semi_transparent)
it.hide(WindowInsets.Type.systemBars())
}
} else {
// see other answers
}
详细解释见https://medium.com/swlh/modifying-system-ui-visibility-in-android-11-e66a4128898b
要隐藏系统 UI，我最近提出了一种简洁且可扩展的方法。它支持所有 Android 版本，包括 Api 级别 31、30 和之前的版本。
object SystemBarsCompat {
private val api: Api =
when {
Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> Api31()
Build.VERSION.SDK_INT == Build.VERSION_CODES.R -> Api30()
else -> Api()
}
fun hideSystemBars(window: Window, view: View, isImmersiveStickyMode: Boolean = false) =
api.hideSystemBars(window, view, isImmersiveStickyMode)
fun showSystemBars(window: Window, view: View) = api.showSystemBars(window, view)
fun areSystemBarsHidden(view: View): Boolean = api.areSystemBarsHidden(view)
@Suppress("DEPRECATION")
private open class Api {
open fun hideSystemBars(window: Window, view: View, isImmersiveStickyMode: Boolean = false) {
val flags = View.SYSTEM_UI_FLAG_FULLSCREEN or
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
view.systemUiVisibility = if (isImmersiveStickyMode) {
flags or View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
} else {
flags or
View.SYSTEM_UI_FLAG_IMMERSIVE or
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
}
}
open fun showSystemBars(window: Window, view: View) {
view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
}
open fun areSystemBarsHidden(view: View) = view.systemUiVisibility and View.SYSTEM_UI_FLAG_HIDE_NAVIGATION != 0
}
@Suppress("DEPRECATION")
@RequiresApi(Build.VERSION_CODES.R)
private open class Api30 : Api() {
open val defaultSystemBarsBehavior = WindowInsetsController.BEHAVIOR_SHOW_BARS_BY_SWIPE
override fun hideSystemBars(window: Window, view: View, isImmersiveStickyMode: Boolean) {
window.setDecorFitsSystemWindows(false)
view.windowInsetsController?.let {
it.systemBarsBehavior =
if (isImmersiveStickyMode) WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
else defaultSystemBarsBehavior
it.hide(WindowInsets.Type.systemBars())
}
}
override fun showSystemBars(window: Window, view: View) {
window.setDecorFitsSystemWindows(false)
view.windowInsetsController?.show(WindowInsets.Type.systemBars())
}
override fun areSystemBarsHidden(view: View) = !view.rootWindowInsets.isVisible(WindowInsets.Type.navigationBars())
}
@RequiresApi(Build.VERSION_CODES.S)
private class Api31 : Api30() {
override val defaultSystemBarsBehavior = WindowInsetsController.BEHAVIOR_DEFAULT
}
}
例如，要隐藏系统栏，可以从 Fragment:
调用
SystemBarsCompat.hideSystemBars(requireActivity().window, view)
我正在开发一个视频播放器应用程序，但遇到了一个问题。我有一个包含全屏按钮的自定义视频控制器，我想在用户进入全屏模式时隐藏系统 UI（导航栏和状态栏）。我试过做类似 this 的事情，但它不能正常工作。我的申请就像下面的截图：
当我单击全屏按钮时，我将方向更改为横向并隐藏了系统 UI，但我的播放器没有全屏。看起来像下面的屏幕：
此外，当我点击屏幕时我想显示我的视频控制器，但是系统 UI 显示以下内容，而不是：
那么，我该如何实现这种行为呢？以下是我的全屏和 hiding/showing 系统 UI:
方法@Override
public void toggleFullscreen() {
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) mVideoContainer.getLayoutParams();
if (!mFullscreen) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
hideSystemUI();
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
params.width = metrics.widthPixels;
params.height = metrics.heightPixels;
params.setMargins(0, 0, 0, 0);
} else {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
showSystemUI();
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
params.width = metrics.widthPixels;
params.height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 300, metrics);
params.setMargins(0, 0, 0, 0);
}
mVideoContainer.setLayoutParams(params);
mFullscreen = !mFullscreen;
}
private void hideSystemUI() {
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
if (Build.VERSION.SDK_INT < 16) {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN)
} else {
uiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
}
decorView.setSystemUiVisibility(uiOptions);
}
private void showSystemUI() {
View decorView = getWindow().getDecorView();
decorView.setSystemUiVisibility(0);
}
这是我的布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/video_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:id="@+id/videoSurfaceContainer"
android:layout_width="match_parent"
android:layout_height="300dp" >
<SurfaceView
android:id="@+id/videoSurface"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
</LinearLayout>
我在每个要隐藏导航栏和状态栏的 activity 中包含这个：
public void hideToolBr(){
// BEGIN_INCLUDE (get_current_ui_flags)
// The UI options currently enabled are represented by a bitfield.
// getSystemUiVisibility() gives us that bitfield.
int uiOptions = getWindow().getDecorView().getSystemUiVisibility();
int newUiOptions = uiOptions;
// END_INCLUDE (get_current_ui_flags)
// BEGIN_INCLUDE (toggle_ui_flags)
boolean isImmersiveModeEnabled =
((uiOptions | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY) == uiOptions);
if (isImmersiveModeEnabled) {
Log.i(Constants.TAG_DEF, "Turning immersive mode mode off. ");
} else {
Log.i(Constants.TAG_DEF, "Turning immersive mode mode on.");
}
// Navigation bar hiding: Backwards compatible to ICS.
if (Build.VERSION.SDK_INT >= 14) {
newUiOptions ^= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
}
// Status bar hiding: Backwards compatible to Jellybean
if (Build.VERSION.SDK_INT >= 16) {
newUiOptions ^= View.SYSTEM_UI_FLAG_FULLSCREEN;
}
// Immersive mode: Backward compatible to KitKat.
// Note that this flag doesn't do anything by itself, it only augments the behavior
// of HIDE_NAVIGATION and FLAG_FULLSCREEN. For the purposes of this sample
// all three flags are being toggled together.
// Note that there are two immersive mode UI flags, one of which is referred to as "sticky".
// Sticky immersive mode differs in that it makes the navigation and status bars
// semi-transparent, and the UI flag does not get cleared when the user interacts with
// the screen.
if (Build.VERSION.SDK_INT >= 18) {
newUiOptions ^= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
}
getWindow().getDecorView().setSystemUiVisibility(newUiOptions);
//END_INCLUDE (set_ui_flags)
}
然后在我的 activity 的 onCreate 方法中，我在 setContentView()
hideToolBr();
然后用户所要做的就是从底部向上滑动或从顶部向下滑动以调出状态栏或导航栏。 Google 称之为 "immersive mode"。它使开发人员可以充分利用设备的屏幕空间。
取自 Google 沉浸式模式示例，调用此显示系统 UI:
// This snippet shows the system bars. It does this by removing all the flags
// except for the ones that make the content appear under the system bars.
private void showSystemUI() {
mDecorView.setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}
您可以找到更多信息here。
编辑：
也将此添加到您的 styles.xml
<style name="YourTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<item name="android:colorForeground">@color/colorPrimaryDark</item>
</style>
转到 https://developer.android.com/training/system-ui/immersive
他们对这个系统的解释非常到位。 并在您的 activity 主题
中添加以下样式<style name="BlackActionTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/black</item>
<item name="colorPrimaryDark">@color/black</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowActionBar">false</item>
</style>
当你想hide/show系统UI时调用这些方法即可。
private void hideSystemUI() {
View decorView = getActivity().getWindow().getDecorView();
int uiOptions = decorView.getSystemUiVisibility();
int newUiOptions = uiOptions;
newUiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
newUiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
newUiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
newUiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE;
newUiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
decorView.setSystemUiVisibility(newUiOptions);
}
private void showSystemUI() {
View decorView = getActivity().getWindow().getDecorView();
int uiOptions = decorView.getSystemUiVisibility();
int newUiOptions = uiOptions;
newUiOptions &= ~View.SYSTEM_UI_FLAG_LOW_PROFILE;
newUiOptions &= ~View.SYSTEM_UI_FLAG_FULLSCREEN;
newUiOptions &= ~View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
newUiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE;
newUiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
decorView.setSystemUiVisibility(newUiOptions);
}
**For Kotlin:**
private fun hideSystemUI() {
val decorView: View = this.window.decorView
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
window.setDecorFitsSystemWindows(false)
} else {
val uiOptions = decorView.systemUiVisibility
var newUiOptions = uiOptions
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_LOW_PROFILE
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_FULLSCREEN
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_IMMERSIVE
newUiOptions = newUiOptions or View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
decorView.systemUiVisibility = newUiOptions
}
}
private fun showSystemUI() {
val decorView: View = this.window.decorView
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
window.setDecorFitsSystemWindows(true)
} else {
val uiOptions = decorView.systemUiVisibility
var newUiOptions = uiOptions
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_LOW_PROFILE.inv()
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_FULLSCREEN.inv()
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_HIDE_NAVIGATION.inv()
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_IMMERSIVE.inv()
newUiOptions = newUiOptions and View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY.inv()
decorView.systemUiVisibility = newUiOptions
}
}
在 API 版本 30 (R) 中设置 window.decorView.systemUiVisibility 已弃用。使用 window.insetsController 代替：
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
window.insetsController?.let {
it.systemBarsBehavior = WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
window.navigationBarColor = getColor(R.color.semi_transparent)
it.hide(WindowInsets.Type.systemBars())
}
} else {
// see other answers
}
详细解释见https://medium.com/swlh/modifying-system-ui-visibility-in-android-11-e66a4128898b
要隐藏系统 UI，我最近提出了一种简洁且可扩展的方法。它支持所有 Android 版本，包括 Api 级别 31、30 和之前的版本。
object SystemBarsCompat {
private val api: Api =
when {
Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> Api31()
Build.VERSION.SDK_INT == Build.VERSION_CODES.R -> Api30()
else -> Api()
}
fun hideSystemBars(window: Window, view: View, isImmersiveStickyMode: Boolean = false) =
api.hideSystemBars(window, view, isImmersiveStickyMode)
fun showSystemBars(window: Window, view: View) = api.showSystemBars(window, view)
fun areSystemBarsHidden(view: View): Boolean = api.areSystemBarsHidden(view)
@Suppress("DEPRECATION")
private open class Api {
open fun hideSystemBars(window: Window, view: View, isImmersiveStickyMode: Boolean = false) {
val flags = View.SYSTEM_UI_FLAG_FULLSCREEN or
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
view.systemUiVisibility = if (isImmersiveStickyMode) {
flags or View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
} else {
flags or
View.SYSTEM_UI_FLAG_IMMERSIVE or
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
}
}
open fun showSystemBars(window: Window, view: View) {
view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
}
open fun areSystemBarsHidden(view: View) = view.systemUiVisibility and View.SYSTEM_UI_FLAG_HIDE_NAVIGATION != 0
}
@Suppress("DEPRECATION")
@RequiresApi(Build.VERSION_CODES.R)
private open class Api30 : Api() {
open val defaultSystemBarsBehavior = WindowInsetsController.BEHAVIOR_SHOW_BARS_BY_SWIPE
override fun hideSystemBars(window: Window, view: View, isImmersiveStickyMode: Boolean) {
window.setDecorFitsSystemWindows(false)
view.windowInsetsController?.let {
it.systemBarsBehavior =
if (isImmersiveStickyMode) WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
else defaultSystemBarsBehavior
it.hide(WindowInsets.Type.systemBars())
}
}
override fun showSystemBars(window: Window, view: View) {
window.setDecorFitsSystemWindows(false)
view.windowInsetsController?.show(WindowInsets.Type.systemBars())
}
override fun areSystemBarsHidden(view: View) = !view.rootWindowInsets.isVisible(WindowInsets.Type.navigationBars())
}
@RequiresApi(Build.VERSION_CODES.S)
private class Api31 : Api30() {
override val defaultSystemBarsBehavior = WindowInsetsController.BEHAVIOR_DEFAULT
}
}
例如，要隐藏系统栏，可以从 Fragment:
SystemBarsCompat.hideSystemBars(requireActivity().window, view)