have already read the article How to hide navigation bar permanently in android activity?
have also tried Permanently hide Navigation Bar in an activity
But that is not what I want
My question is can I change code from source which hide navigation bar permanently
such as path:frameworks\base\services\java\com\android\server\SystemServer.java where the main start
and where can I set navigation bar invisible
which in user view they cannot see navigationbar forever after they power on their device
the solution might only work in android 11
yep I will just answer this by myself
to remove the navigation bar on the entire system
the andoird 11 works totally different compare to android 7
they remove PhoneStatusBar.java and combine it into StatusBar.java
both of them are in ..\frameworks\base\packages\SystemUI\src\com\android\systemui\statusbar\phone
in Android7 method people use
mWindowManager.removeViewImmediate(mNavigationBarView);
but this might not works properly and might cause SystemUI shut down
try use below method to do so
Path ..\SystemUI\src\com\android\systemui\statusbar\NavigationBarController.java
#Override
public void onDisplayRemoved(int displayId) {
removeNavigationBar(displayId);
}
Using view to set flag cannot work properly because when you switch window or app the nav bar will appear again
Since it seems that we can no longer hide the bar with home and back buttons in Jellybean, I'd at least like to fade it out a little like in the Kindle app (where the buttons are only small discrete dots).
I've been searching all over the place for this but I can't seem to find it!
Cheers
/M
You can use:
View rootView = getWindow().getDecorView();
rootView.setSystemUiVisibility(View.STATUS_BAR_HIDDEN);
View.SYSTEM_UI_FLAG_LOW_PROFILE replaces View.STATUS_BAR_HIDDEN on Android 4.0 and above.
You can also use View.SYSTEM_UI_FLAG_HIDE_NAVIGATION to attempt to hide the bar completely. Note that this will mostly only work on handsets and not tablets, and that several Samsung TouchWiz devices do not interpret this correctly. The bar will also consume the first user interaction with the screen to show itself again while your app is running.
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
How can I hide Status bar and show on touch as in the video players in Android 4.0.3? I tried use
setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION), setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE) and setSystemUiVisibility(View.STATUS_BAR_VISIBLE)
on tablets, but it's not work.
Try to use this flag:
public static final int SYSTEM_UI_FLAG_FULLSCREEN
Since: API Level 16
Although api level 16 it is works on my 4.0.4 tablet.
You cannot hide the system bar on Android tablets, sorry. You can dim the system bar, but not remove it entirely.
As #CommonsWare said, that's not possible on Tablets. Use
view.setSystemUiVisibility(View.STATUS_BAR_HIDDEN);
view.setSystemUiVisibility(View.STATUS_BAR_VISIBLE);
to make darker the system bar for full screen mode. I am using this code and it's working well. Almost the entire screen is dark, only small grey points appear where the system buttons (back, home, ...) are.
I'd like to extend the discussion regarding hiding of the system/navigation bar at the bottom of the screen on Android Ice Cream Sandwich (4.0 and up) tablet devices.
There's already a thread ( Is there a way to hide the system bar in Android 3.0? It's an internal device and I'm managing navigation ) about hiding the bar on Honeycomb devices. My clients, however, will be using the newest Ice Cream Sandwich devices and are very keen on hiding the bar at the bottom the screen. Their application is not for regular consumer use and it's very important for them to take over the whole screen to provide their experience. How possible is it to hide this bar -- or at least, override the behaviour of all the buttons -- without rooting the devices or rewriting its firmware?
Check out SYSTEM_UI_FLAG_HIDE_NAVIGATION, this flag hides the navigation bar until the user interacts with the device. It was introduced in Android 4.0. You can enable this flag for example like this:
getWindow().getDecorView()
.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
Note that the navigation won't disappear again automatically, you have to set it every time after the user interacted with the device.
Alternatively you can make the navigation less obtrusive by using SYSTEM_UI_FLAG_LOW_PROFILE, this changes the buttons into small dots (e.g. like the camera app).
on rooted devices, i use the following adb command
adb shell pm disable com.android.systemui
to hide navigation bar permanently. To show it again, run
adb shell pm enable com.android.systemui
so far it's working fine for me
Using the below code is one way of doing it to hide navigation
getWindow().getDecorView()
.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
But the problem with the above is that it becomes visible as soon as user touches the screen.
In Android Kitkat there is a feature called as IMMERSIVE which hides the notification bar and the navigation. It does not show even if the user interacts with the screen. However the user can make it visible by swiping it from top of the screen to bottom. Below is the code to achieve it
//Initializew this in onCreate()
View mDecorView = getWindow().getDecorView();
//Then call this function
private void hideSystemUI() {
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
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LOW_PROFILE
| View.SYSTEM_UI_FLAG_IMMERSIVE);
}
However in my case I never wanted the navigation and notification bar to be visible even if the user swipes from top of the screen to bottom. I gave it a try and I was able to achieve it partially. What I did was I implemented a CountDownTimerwhich would call hideSystemUI() every second or so. I know it is not the best way of doing it. But I did not get any other solution to do it.
If someone gets any then please let me know on how to permanently hide navigation and notification bar :) Hope this answer helps some one in future :)
Watch this video to better understand about this feature.
Update - there is a work around which can be used for such cases (manually setting up the app for the client). Indeed, the navigation bar can't be removed within the given framework.
However, there is a solution to hide the navigation bar if rooting the device is an option for you. Here is how:
Root device
Install and run Busybox
Install HideBar
In HideBar there is an option to run in 'Kiosk' mode, in which there is no way to re-display the navigation bar. Needless to say, you really need to be careful with this.
Risks involved:
bricking the device
getting the installation of BusyBox wrong, which could get things a bit tricky, although is very unlikely to cause loss of information.
getting into a stalemate where you can't quit your app. For example if 1 your GUI doesn't provide a close option, 2 your app start automatically on start-up, 3 HideBar doesn"t allow any way of re-displaying the navigation bar and 4 HideBar hids the navigation bar on startup. However this can be overcome by simply stopping/uninstalling your app from adb.
Here are other identical questions:
Android tablet navigation bar won't hide
How to remove system bars on Android, I mean, all
Android tablet navigation bar won't hide
Is there a way to hide the system/navigation bar in Android ICS
Hide Tablet system bar
Real Fullscreen with Android 4 Tablets
Easy way to hide system bar on Android ICS
Although it's a hacky solution, I think it deserves attention because does not require rooting the device:
getWindow().getDecorView().setSystemUiVisibility(8);.
To hide status bar and navigation bar in android ics use
LinearLayout layout = (LinearLayout)findViewById(R.id.layout);
layout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
EDIT: As of 4.4 (19) you can use the following to enable what is called "IMMERSIVE MODE". It was introduced for Google's Cardboard vrtoolkit, but can be used generally.
setSystemUiVisibility(View.SYSTEM_UI_FLAG_IMMERSIVE)
https://developer.android.com/training/system-ui/immersive.html
From my efforts, it seems that:
setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION)
does not work on tablets.
It does work on smartphones (tested with a Nexus 4 Mako), but it will reappear on a touch/click event.
This also seems to capture focus to the bar, forcing you to click twice to regain focus to the view.
I have been trying to find a way to trap the event that actually redisplays the bar. No luck.
Being stubborn, I am going to download the android os code, fire up the eclipse debugger and go a-huntin. This is not a bug - the nav bar is crucial to app lifecycle.
I have seen apps do it (games and such) so there is a way without rooting.
place this code in your application tag in manifest file to hide default tab bar
<Application
android:theme="#android:style/Theme.Black.NoTitleBar.Fullscreen" <!--
other parameters of application tag-->
>
and the then make a linear or relative layout and place it in your activity layout.
You can not hide it unless you have rooted the device. But of course there is a workaround which might not fit with your requirement but several well known apps in the market at the moment using this strategy to achieve this disable menu bar feature for their apps.
Grant admin privilege.
Set password & lock the device using device admin profile api
Then load what ever the UIs on top of the native lock screen. (Of course this will show background lock screen whenever a transition happens between activities. But if logic is organized well, then it will be smooth & less noticed by the user)
When need to enable back, reset password to "" using resetPassword("", 0) of device policy manager object.
may be is the button behavor is enought you can have a look in my answer here
you still have the bar but you can't exit app without reboot tablet
You can hide the navigation bar on Android 4.0 and higher using the SYSTEM_UI_FLAG_HIDE_NAVIGATION flag. This snippet hides both the navigation bar and the status bar:
View decorView = getWindow().getDecorView();
// Hide both the navigation bar and the status bar.
// SYSTEM_UI_FLAG_FULLSCREEN is only available on Android 4.1 and higher, but as
// a general rule, you should design your app to hide the status bar whenever you
// hide the navigation bar.
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions
See the following: Hiding the Navigation Bar
If your device is rooted this code will help you to hide system bar on ICS (I tested it on Samsung Galaxy Tab 2 and it works excellent):
ArrayList<String> list = new ArrayList<String>();
Map<String, String> env = System.getenv();
for (String envName : env.keySet()) {
list.add(envName + "=" + env.get(envName));
}
// Array containing the environment to start the new process in
String[] envp = (String[]) list.toArray(new String[0]);
String hidingCommand = "while [ true ]\n" + "do\n" + "killall com.android.systemui\n" + "done\n";
Runtime.getRuntime().exec(new String[] { "su", "-c", command }, envp);
myContext.sendBroadcast(new Intent("com.mycompany.myapp.ACTION_BARHIDDEN"));
How to hide StatusBar in Android 4:
Help me, please.
The bar that is shown in the image in your question is called the system bar.
On devices with no hardware buttons the system bar will always be displayed if user input occurs. You can call setSystemUiVisibility with the flags SYSTEM_UI_FLAG_HIDE_NAVIGATION and request the following window feature FLAG_FULLSCREEN via the Window. This should hide the system bar and make your view fullscreen as long as the user does not interact with the screen. If the user touches the screen the system bar will reappear to allow the user to use the home and back software keys.
If you have a view that the user will interact with but you want him not to be distracted by the system bar you can set the SYSTEM_UI_FLAG_LOW_PROFILE flag. This should dim the system bar and make it less distracting.
I agree with Janusz. You can not get 100% true full screen in Android 4.0.
Use the following to dim the notification bar (aka. status bar, system bar)
getWindow().getDecorView().setSystemUiVisibility
(View.SYSTEM_UI_FLAG_LOW_PROFILE);
And use this to hide it
getWindow().getDecorView().setSystemUiVisibility
(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
And, if I guess right, you are trying to achieve a "kiosk mode". You can get a little help with an app named "surelock". This blocks all the "home" and "back" actions.
If you wish a smooth experience without an intermediate "jerked" layout, here is the solution from API level 14.
final Window window = getWindow();
if (isFullScreen == true)
{
window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
// This flag will prevent the status bar disappearing animation from jerking the content view
window.addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
window.clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
}
else
{
window.addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
window.clearFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
window.clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
you can hide it. just use following api in OnCreate() method
requestWindowFeature(Window.FEATURE_NO_TITLE);