我如何使一个活动全屏?没有通知栏。
当前回答
https://developer.android.com/training/system-ui/immersive.html
活动:
@Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (hasFocus) {
decorView.setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
}
}
安卓清单:
<activity android:name=".LoginActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="@string/title_activity_login"
android:theme="@style/FullscreenTheme"
></activity>
其他回答
用kotlin是这样做的:
class LoginActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_login)
window.decorView.systemUiVisibility =
View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or
View.SYSTEM_UI_FLAG_FULLSCREEN
}
}
身临其境的模式
沉浸式模式适用于用户需要与屏幕进行大量交互的应用程序。例如游戏、浏览图库中的图像或阅读分页内容(如书籍或演示文稿中的幻灯片)。为此,只需添加这几行:
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION or
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
粘性身临其境
在常规的沉浸式模式下,每当用户从边缘滑动时,系统都会负责显示系统条——你的应用程序甚至不会意识到这个手势发生了。因此,如果用户可能真的需要从屏幕边缘滑动作为主要应用体验的一部分——比如在玩一款需要大量滑动的游戏或使用绘图应用时——你应该启用“粘性”沉浸模式。
View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
有关更多信息:启用全屏模式
如果你使用键盘,有时会发生状态栏显示时,键盘显示。在这种情况下,我通常将此添加到我的style xml
styles.xml
<style name="FullScreen" parent="AppTheme">
<item name="android:windowFullscreen">true</item>
</style>
还有这一行到我的载货单上
<activity
android:name=".ui.login.LoginActivity"
android:label="@string/title_activity_login"
android:theme="@style/FullScreen">
创建一个空活动,并在onCreate中添加两行。
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// full screen activity
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
getSupportActionBar().hide();
setContentView(R.layout.activity_main);
}
...
}
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。
import androidx.core.view.WindowInsetsCompat.Type
fun Activity.fullscreen() {
with(WindowInsetsControllerCompat(window, window.decorView)) {
systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_BARS_BY_SWIPE
hide(Type.systemBars())
}
}
fun Activity.exitFullscreen() {
WindowInsetsControllerCompat(window, window.decorView).show(Type.systemBars())
}
AndroidManifest.xml
<activity ...
android:theme="@style/FullScreenTheme"
>
</activity>
I.你的主应用的主题是theme . appcompat . light . darkactionbar
隐藏ActionBar / StatusBar style.xml
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
...
</style>
<style name="FullScreenTheme" parent="AppTheme">
<!--this property will help hide the ActionBar-->
<item name="windowNoTitle">true</item>
<!--currently, I don't know why we need this property since use windowNoTitle only already help hide actionbar. I use it because it is used inside Theme.AppCompat.Light.NoActionBar (you can check Theme.AppCompat.Light.NoActionBar code). I think there are some missing case that I don't know-->
<item name="windowActionBar">false</item>
<!--this property is used for hiding StatusBar-->
<item name="android:windowFullscreen">true</item>
</style>
隐藏系统导航栏
public class MainActivity extends AppCompatActivity {
protected void onCreate(Bundle savedInstanceState) {
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
setContentView(R.layout.activity_main)
...
}
}
2你的主应用主题是theme . appcompat . light . noactionbar
隐藏ActionBar / StatusBar style.xml
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
...
</style>
<style name="FullScreenTheme" parent="AppTheme">
<!--don't need any config for hide ActionBar because our apptheme is NoActionBar-->
<!--this property is use for hide StatusBar-->
<item name="android:windowFullscreen">true</item> //
</style>
隐藏系统导航栏
类似于theme。appcompat。light。darkactionbar。
演示
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