我想知道如何在 Android 应用程序中隐藏导航栏？
我最初知道如何隐藏它，但是一旦我触摸屏幕，它就会弹出。我想隐藏它，就像《部落冲突》等游戏隐藏它一样，使其弹出的唯一方法是向下滑动通知或滑动导航栏应该在的位置。
使用沉浸式模式检查此沉浸式模式
// This snippet hides the system bars.
private void hideSystemUI() {
// Set the IMMERSIVE flag.
// Set the content to appear under the system bars so that the content
// doesn't resize when the system bars hide and show.
mDecorView.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 // hide nav bar
| View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
| View.SYSTEM_UI_FLAG_IMMERSIVE);
}
// 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);
}
这是在 onCreate 方法的上下文中：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.getWindow().getDecorView().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);
}
Android 文档对不同标志的作用有很好的解释： 使用沉浸式全屏模式
只需将此方法放入您想要以粘性模式隐藏状态栏和导航栏的 Activity 中即可。
@Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
//This is used to hide/show 'Status Bar' & 'System Bar'. Swip bar to get it as visible.
View decorView = getWindow().getDecorView();
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);
}
}
最简单的方法是在 super.onCreate(savedInstanceState); 之后添加这两行
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
您可以使用上面的代码片段创建一个活动，然后在布局上方添加另一个窗口：
LayoutParams layoutParameteres=new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
v.setLayoutParams(layoutParameteres);
final WindowManager.LayoutParams parameters=new WindowManager.LayoutParams(sizeX, sizeY, WindowManager.LayoutParams.TYPE_PHONE, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.TRANSLUCENT);
parameters.gravity=Gravity.CENTER;
parameters.x=0;
parameters.y=0;
wm.addView(v, parameters);
祝你好运
在您的 Activity 的 onCreate 方法中：
this.getWindow()
.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
科特林
override fun onCreate(savedInstanceState: Bundle?) {
val windowInsetsController =
WindowCompat.getInsetsController(window, window.decorView)
// Configure the behavior of the hidden system bars.
windowInsetsController.systemBarsBehavior =
WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
// Add a listener to update the behavior of the toggle fullscreen button when
// the system bars are hidden or revealed.
window.decorView.setOnApplyWindowInsetsListener { view, windowInsets ->
// You can hide the caption bar even when the other system bars are visible.
// To account for this, explicitly check the visibility of navigationBars()
// and statusBars() rather than checking the visibility of systemBars().
if (windowInsets.isVisible(WindowInsetsCompat.Type.navigationBars())
|| windowInsets.isVisible(WindowInsetsCompat.Type.statusBars())) {
binding.toggleFullscreenButton.setOnClickListener {
// Hide both the status bar and the navigation bar.
windowInsetsController.hide(WindowInsetsCompat.Type.systemBars())
}
} else {
binding.toggleFullscreenButton.setOnClickListener {
// Show both the status bar and the navigation bar.
windowInsetsController.show(WindowInsetsCompat.Type.systemBars())
}
}
view.onApplyWindowInsets(windowInsets)
}
}
JAVA
@Override
protected void onCreate(Bundle savedInstanceState) {
...
WindowInsetsControllerCompat windowInsetsController =
WindowCompat.getInsetsController(getWindow(), getWindow().getDecorView());
// Configure the behavior of the hidden system bars.
windowInsetsController.setSystemBarsBehavior(
WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
);
// Add a listener to update the behavior of the toggle fullscreen button when
// the system bars are hidden or revealed.
getWindow().getDecorView().setOnApplyWindowInsetsListener((view, windowInsets) -> {
// You can hide the caption bar even when the other system bars are visible.
// To account for this, explicitly check the visibility of navigationBars()
// and statusBars() rather than checking the visibility of systemBars().
if (windowInsets.isVisible(WindowInsetsCompat.Type.navigationBars())
|| windowInsets.isVisible(WindowInsetsCompat.Type.statusBars())) {
binding.toggleFullscreenButton.setOnClickListener(v -> {
// Hide both the status bar and the navigation bar.
windowInsetsController.hide(WindowInsetsCompat.Type.systemBars());
});
} else {
binding.toggleFullscreenButton.setOnClickListener(v -> {
// Show both the status bar and the navigation bar.
windowInsetsController.show(WindowInsetsCompat.Type.systemBars());
});
}
return view.onApplyWindowInsets(windowInsets);
});
}
参考：https://developer.android.com/develop/ui/views/layout/immersive
修改AndroidManifest.xml文件中的这一行
android:theme="@style/Theme.AppCompat.DayNight.NoActionBar"