我如何使一个活动全屏?没有通知栏。
当前回答
在AndroidManifest.xml文件:
<activity
android:name=".Launch"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" > <!-- This line is important -->
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
或者在Java代码中:
protected void onCreate(Bundle savedInstanceState){
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
其他回答
你可以通过编程来实现:
public class ActivityName extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// remove title
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
}
}
或者你也可以通过AndroidManifest.xml文件来实现:
<activity android:name=".ActivityName"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"/>
编辑:
如果你正在使用AppCompatActivity,那么你需要添加新的主题
<style name="Theme.AppCompat.Light.NoActionBar.FullScreen" parent="@style/Theme.AppCompat.Light.NoActionBar">
<item name="android:windowNoTitle">true</item>
<item name="android:windowActionBar">false</item>
<item name="android:windowFullscreen">true</item>
<item name="android:windowContentOverlay">@null</item>
</style>
然后使用它。
<activity android:name=".ActivityName"
android:label="@string/app_name"
android:theme="@style/Theme.AppCompat.Light.NoActionBar.FullScreen"/>
感谢https://stackoverflow.com/a/25365193/1646479
下面是一个示例代码。您可以打开/关闭标志来隐藏/显示特定的部件。
public static void hideSystemUI(Activity activity) {
View decorView = activity.getWindow().getDecorView();
decorView.setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
//| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
//| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
| View.SYSTEM_UI_FLAG_IMMERSIVE);
}
然后,重置到默认状态:
public static void showSystemUI(Activity activity) {
View decorView = activity.getWindow().getDecorView();
decorView.setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}
你可以在onCreate中调用上面的函数:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.course_activity);
UiUtils.hideSystemUI(this);
}
根据安卓开发者培训
你应该做到以下几点:
科特林:
private fun hideSystemBars() {
val windowInsetsController =
ViewCompat.getWindowInsetsController(window.decorView) ?: return
// Configure the behavior of the hidden system bars
windowInsetsController.systemBarsBehavior =
WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
// Hide both the status bar and the navigation bar
windowInsetsController.hide(WindowInsetsCompat.Type.systemBars())
}
Java:
private void hideSystemBars() {
WindowInsetsControllerCompat windowInsetsController =
ViewCompat.getWindowInsetsController(getWindow().getDecorView());
if (windowInsetsController == null) {
return;
}
// Configure the behavior of the hidden system bars
windowInsetsController.setSystemBarsBehavior(
WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
);
// Hide both the status bar and the navigation bar
windowInsetsController.hide(WindowInsetsCompat.Type.systemBars());
}
从mozilla找到解决方案,他们在这里做了一个扩展库
如果链接中断,这里是代码
/**
* Retrieves a {@link WindowInsetsControllerCompat} for the top-level window decor view.
*/
fun Window.getWindowInsetsController(): WindowInsetsControllerCompat {
return WindowInsetsControllerCompat(this, this.decorView)
}
/**
* Attempts to call immersive mode using the View to hide the status bar and navigation buttons.
* @param onWindowFocusChangeListener optional callback to ensure immersive mode is stable
* Note that the callback reference should be kept by the caller and be used for [exitImmersiveModeIfNeeded] call.
*/
fun Activity.enterToImmersiveMode(
onWindowFocusChangeListener: ViewTreeObserver.OnWindowFocusChangeListener? = null
) {
window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
window.getWindowInsetsController().apply {
hide(WindowInsetsCompat.Type.systemBars())
systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
}
// We need to make sure system bars do not become permanently visible after interactions with content
// see https://github.com/mozilla-mobile/fenix/issues/20240
onWindowFocusChangeListener?.let {
window.decorView.viewTreeObserver?.addOnWindowFocusChangeListener(it)
}
}
/**
* Attempts to come out from immersive mode using the View.
* @param onWindowFocusChangeListener optional callback to ensure immersive mode is stable
* Note that the callback reference should be kept by the caller and be the same used for [enterToImmersiveMode] call.
*/
@Suppress("DEPRECATION")
fun Activity.exitImmersiveModeIfNeeded(
onWindowFocusChangeListener: ViewTreeObserver.OnWindowFocusChangeListener? = null
) {
if (WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON and window.attributes.flags == 0) {
// We left immersive mode already.
return
}
onWindowFocusChangeListener?.let {
window.decorView.viewTreeObserver?.removeOnWindowFocusChangeListener(it)
}
window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
window.getWindowInsetsController().apply {
show(WindowInsetsCompat.Type.systemBars())
}
}
getWindow().addFlags(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
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