I thought that is a solution for that but I cannot find it. I know that I can disable back button by overriding onBackPress() method and not call super.onBackPress() but it only disable, I want to remove/hide from navigation bar this button.
And I known that on some device where the back button is a part of hardware it can be done.
To be clear I mean arrow on below screen:
You can find solution in the documentation.
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);
and this code should be placed in onCreate() method in the Activity after initializing all UI elements.
use this code in your onCreate() method : to hide
View bView = getWindow().getDecorView();
bView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
Related
I want to hide the statusbar from all layouts on click of button.That button i have define in setting layout. But on click of hide button the status bar of current layout is getting hide but on other layout is unaffected.So let me know how to implement it on all the layouts of mu app.
Create a superclass for all Activities, call it something like BaseActivity or AbstractActivity and make each activity extend this class
In the onCreate, before setContentView, read from a database like SharedPreferences whether the status bar should be hidden. If so, then hide it.
In your Settings activity, call recreate() so that each onCreate from the previous activities are called again.
It actually depends on the version of android you are using. For example in Android 4.0 and lower you can achieve it by doing:
<application
...
android:theme="#android:style/Theme.Holo.NoActionBar.Fullscreen" >
...
</application>
For full documentation go to: https://developer.android.com/training/system-ui/status
Edit: What would be better for your button is this code:
void HideStatusBar() {
View decorView = getWindow().getDecorView();
// Hide the status bar.
int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
// Remember that you should never show the action bar if the
// status bar is hidden, so hide that too if necessary.
ActionBar actionBar = getActionBar();
actionBar.hide();
}
So, when the user clicks the button call this function. Remember this also hides the action bar or toolbar, so if you don't want that remove the actionbar.hide() part. It's nice, but unfortunately, it only works on Android 4.1 and higher, so if you are supporting lower versions too better look at the documentation for clues. Hope it helps!
added listview to PopupWindow object, on click Navigation key bar is popping, is there is a way to block navigation bar on click of dropdown.
try this snippet inside on onclick of drop down item
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);
and refer here and here
I hide the navigation bar (see below) but when I press the menu button on action bar the navigation bar immediately appear.
Can I hide nav. bar permanently?
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
setContentView(R.layout.activity_fomenu);
}
Take a look at the documentation. It says to hide the navigation use
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);
You're already doing that. But then it says
With this approach, touching anywhere on the screen causes the navigation bar (and status bar) to reappear and remain visible. The user interaction causes the flags to be be cleared. Once the flags have been cleared, your app needs to reset them if you want to hide the bars again. See Responding to UI Visibility Changes for a discussion of how to listen for UI visibility changes so that your app can respond accordingly.
This means that you will have to reset the flags when the user selects the options menu. A sample code is also given here.
On the first start of my app I start an Intro-Activity in fullscreen with hidden navigation bar (black bar at the bottom) with:
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
The Activity contains a Button to close it.
My problem is: with hidden navigation bar, the first tap on the close-button does not trigger the button, but reveals the navigation bar, only the second tap triggers the button.
Is there a way how I can close the Activity on first button tap?
The answer is described here- https://developer.android.com/training/system-ui/immersive.html. There's a new flag SYSTEM_UI_FLAG_IMMERSIVE that allows this. Unfortunately its KitKat and above only- older phones do not have the capability.
I want to hide Bottom Option Bar in Android. I don't know whether we call it Option Bar it or not.
Please check it out Image below : Tell me if we call it something else. It is in bottom.
Now, I want to hide it. How to do it ?
It's called navigation bar, the reason for it only having the options button is probably because your device has hardware buttons for home and back, that's why it looks like an options button only bar.
Refer to the docs for hiding it, although it will only work for versions supporting it.
For 4.0+
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);