我如何使一个活动全屏?没有通知栏。
当前回答
提示:使用getWindow().setLayout()会搞砸你的全屏显示!注意,这个方法的文档说:
设置窗口的宽度和高度布局参数… 你可以把它们改成……用于制作非全屏窗口的绝对值。
http://developer.android.com/reference/android/view/Window.html#setLayout%28int,%20int%29
For my purposes, I found that I had to use setLayout with absolute parameters to resize my full screen window correctly. Most of the time, this worked fine. It was called by an onConfigurationChanged() event. There was a hiccup, however. If the user exited the app, changed the orientation, and reentered, it would lead to firing off my code which included setLayout(). During this re-entry time window, my status bar (which was hidden by the manifest) would be made to re-appear, but at any other time setLayout() would not cause this! The solution was to add an additional setLayout() call after the one with the hard values like so:
public static void setSize( final int width, final int height ){
//DO SOME OTHER STUFF...
instance_.getWindow().setLayout( width, height );
// Prevent status bar re-appearance
Handler delay = new Handler();
delay.postDelayed( new Runnable(){ public void run() {
instance_.getWindow().setLayout(
WindowManager.LayoutParams.FILL_PARENT,
WindowManager.LayoutParams.FILL_PARENT );
}}, FILL_PARENT_ON_RESIZE_DELAY_MILLIS );
}
然后,窗口正确地调整大小,状态栏不会重新出现,不管触发这一事件。
其他回答
通过缺口或切口区域显示内容。这可以从文档中得到帮助:
LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES -在纵向和横向模式下将内容呈现到剪切区域。
对我来说最重要的是activity样式中的这一行:
// Important to draw through the cutouts
<item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
对我来说,我想以沉浸式模式展示图像。当我点击它时,我希望系统UI(状态和导航栏)显示出来。
以下是我的解决方案:
在Activity中,一些显示/隐藏系统UI的方法(状态条/导航条)
private fun hideSystemUI() {
sysUIHidden = true
window.decorView.systemUiVisibility = (
View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
or View.SYSTEM_UI_FLAG_LAYOUT_STABLE
// Hide the nav bar and status bar
or View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // Hide nav bar
or View.SYSTEM_UI_FLAG_FULLSCREEN // Hide status bar
)
}
private fun showSystemUI() {
sysUIHidden = false
window.decorView.systemUiVisibility = (
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
// Set the content to appear under the system bars so that the
// content doesn't resize when the system bars hide and show.
or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION // layout Behind nav bar
or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN // layout Behind status bar
)
}
2-确保在你的xml布局的根视图中
android:fitsSystemWindows="false"
3-全屏活动的风格将给状态/导航栏显示时一个半透明的背景:
<style name="FullscreenTheme" parent="AppTheme">
<item name="android:actionBarStyle">@style/FullscreenActionBarStyle</item>
<item name="android:windowActionBarOverlay">true</item>
<item name="android:windowBackground">@null</item>
<item name="metaButtonBarStyle">?android:attr/buttonBarStyle</item>
<item name="metaButtonBarButtonStyle">?android:attr/buttonBarButtonStyle</item>
<item name="android:statusBarColor">#50000000</item>
<item name="android:navigationBarColor">#50000000</item>
// Important to draw behind cutouts
<item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
</style>
<style name="FullscreenActionBarStyle" parent="Widget.AppCompat.ActionBar">
<item name="android:background">@color/sysTransparent</item>
</style>
科特林
遵循谷歌文档,有一个简单的方法:
override fun onWindowFocusChanged(hasFocus: Boolean) {
super.onWindowFocusChanged(hasFocus)
if (hasFocus) hideSystemUI() }
private fun hideSystemUI() {
// Enables regular immersive mode.
// For "lean back" mode, remove SYSTEM_UI_FLAG_IMMERSIVE.
// Or for "sticky immersive," replace it with SYSTEM_UI_FLAG_IMMERSIVE_STICKY
window.decorView.systemUiVisibility = (View.SYSTEM_UI_FLAG_IMMERSIVE
// Set the content to appear under the system bars so that the
// content doesn't resize when the system bars hide and show.
or View.SYSTEM_UI_FLAG_LAYOUT_STABLE
or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
// Hide the nav bar and status bar
or View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
or View.SYSTEM_UI_FLAG_FULLSCREEN) }
// Shows the system bars by removing all the flags
// except for the ones that make the content appear under the system bars.
private fun showSystemUI() {
window.decorView.systemUiVisibility =
(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN) }
谷歌文档
getWindow () .setFlags (WindowManager.LayoutParams。FLAG_LAYOUT_NO_LIMITS WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);if (getSupportActionBar() != null){getSupportActionBar().hide();}
提示:使用getWindow().setLayout()会搞砸你的全屏显示!注意,这个方法的文档说:
设置窗口的宽度和高度布局参数… 你可以把它们改成……用于制作非全屏窗口的绝对值。
http://developer.android.com/reference/android/view/Window.html#setLayout%28int,%20int%29
For my purposes, I found that I had to use setLayout with absolute parameters to resize my full screen window correctly. Most of the time, this worked fine. It was called by an onConfigurationChanged() event. There was a hiccup, however. If the user exited the app, changed the orientation, and reentered, it would lead to firing off my code which included setLayout(). During this re-entry time window, my status bar (which was hidden by the manifest) would be made to re-appear, but at any other time setLayout() would not cause this! The solution was to add an additional setLayout() call after the one with the hard values like so:
public static void setSize( final int width, final int height ){
//DO SOME OTHER STUFF...
instance_.getWindow().setLayout( width, height );
// Prevent status bar re-appearance
Handler delay = new Handler();
delay.postDelayed( new Runnable(){ public void run() {
instance_.getWindow().setLayout(
WindowManager.LayoutParams.FILL_PARENT,
WindowManager.LayoutParams.FILL_PARENT );
}}, FILL_PARENT_ON_RESIZE_DELAY_MILLIS );
}
然后,窗口正确地调整大小,状态栏不会重新出现,不管触发这一事件。
只需将此代码粘贴到onCreate()方法中
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
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