Permanently hide Navigation Bar in an activity

Question

Is it possible to permanently remove the Navigation Bar on an activity  I want to remove the bar with the buttons that appear at the button of the screen on a tablet  not the Action Bar  Here   I know it is not recommended to do that  I did not make this decision  but I need to do it  On my layout  there is another button to leave the activity  The rest of my app can have and does have the Navigation Bar   I found this code and adapted it a little bit  The problem is that even when I hide the Navigation Bar  there is a black space left behind  I guess the system calculates the screen size having into account the navigation bar   public static class Content extends ImageView implements View OnSystemUiVisibilityChangeListener  View OnClickListener  ActionBar OnMenuVisibilityListener       Activity mActivity      TextView mTitleView      Button mPlayButton      SeekBar mSeekView      boolean mAddedMenuListener      boolean mMenusOpen      boolean mPaused      boolean mNavVisible      int mLastSystemUiVis       Runnable mNavHider   new Runnable              Override public void run                 setNavVisibility false                         public Content Context context  AttributeSet attrs            super context  attrs           setOnSystemUiVisibilityChangeListener this           setOnClickListener this              public void init Activity activity  TextView title  Button playButton              SeekBar seek               This called by the containing activity to supply the surrounding            state of the video player that it will interact with          mActivity   activity          mTitleView   title          mPlayButton   playButton          mSeekView   seek          mPlayButton setOnClickListener this           setPlayPaused true               Override protected void onAttachedToWindow             super onAttachedToWindow            if  mActivity    null                mAddedMenuListener   true              mActivity getActionBar   addOnMenuVisibilityListener this                         Override protected void onDetachedFromWindow             super onDetachedFromWindow            if  mAddedMenuListener                mActivity getActionBar   removeOnMenuVisibilityListener this                         Override public void onSystemUiVisibilityChange int visibility               Detect when we go out of nav-hidden mode  to clear our state            back to having the full UI chrome up   Only do this when            the state is changing and nav is no longer hidden          int diff   mLastSystemUiVis   visibility          mLastSystemUiVis   visibility          if   diff amp SYSTEM UI FLAG HIDE NAVIGATION     0                  amp  amp   visibility amp SYSTEM UI FLAG HIDE NAVIGATION     0                setNavVisibility true                         Override protected void onWindowVisibilityChanged int visibility            super onWindowVisibilityChanged visibility               When we become visible or invisible  play is paused          setPlayPaused true               Override public void onClick View v            if  v    mPlayButton                   Clicking on the play pause button toggles its state              setPlayPaused  mPaused             else                  Clicking elsewhere makes the navigation visible              setNavVisibility true                         Override public void onMenuVisibilityChanged boolean isVisible            mMenusOpen   isVisible          setNavVisibility true              void setPlayPaused boolean paused            mPaused   paused          mPlayButton setText paused   R string play   R string pause           setKeepScreenOn  paused           setNavVisibility true              void setNavVisibility boolean visible            int newVis   SYSTEM UI FLAG LAYOUT FULLSCREEN                   SYSTEM UI FLAG LAYOUT HIDE NAVIGATION                   SYSTEM UI FLAG LAYOUT STABLE          if   visible                newVis    SYSTEM UI FLAG LOW PROFILE   SYSTEM UI FLAG FULLSCREEN                       SYSTEM UI FLAG HIDE NAVIGATION                        If we are now visible  schedule a timer for us to go invisible          if  visible                Handler h   getHandler                if  h    null                    h removeCallbacks mNavHider                   if   mMenusOpen  amp  amp   mPaused                           If the menus are open or play is paused  we will not auto-hide                      h postDelayed mNavHider  1500                                                         Set the new desired visibility          setSystemUiVisibility newVis           mTitleView setVisibility visible   VISIBLE   INVISIBLE           mPlayButton setVisibility visible   VISIBLE   INVISIBLE           mSeekView setVisibility visible   VISIBLE   INVISIBLE

User · Answer

From Google documentation   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     http   developer android com training system-ui navigation html

User · Answer

You can hide navigation bar  just call this method on your onCreate      public void FullScreencall         if Build VERSION SDK INT  lt  19            View v   this getWindow   getDecorView            v setSystemUiVisibility View GONE         else                 for higher api versions              View decorView   getWindow   getDecorView             int uiOptions   View SYSTEM UI FLAG HIDE NAVIGATION   View SYSTEM UI FLAG IMMERSIVE STICKY          decorView setSystemUiVisibility uiOptions             This will hide whole nagiation panel hope it helps you

User · Answer

After watching the DevBytes video  by Roman Nurik  and reading the very last line in the docs  which says      Note  If you like the auto-hiding behavior of IMMERSIVE STICKY but need to show your own UI controls as well  just use IMMERSIVE combined with Handler postDelayed   or something similar to re-enter immersive mode after a few seconds    the answer  radu122 gave  worked for me  Just setup a handler and your will be good to go   Here is the code which works for me    Override protected void onResume         super onResume        executeDelayed        private void executeDelayed         Handler handler   new Handler        handler postDelayed new Runnable              Override         public void run                    execute after 500ms             hideNavBar                     500       private void hideNavBar         if  Build VERSION SDK INT  gt   19            View v   getWindow   getDecorView            v 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             Google says  after a few seconds  - but I want to provide this functionality as soon as possible  Maybe I will change the value later  if I have to  I will update this answer

User · Answer

There is a solution starting with KitKat  4 4 2   called Immersive Mode  https   developer android com training system-ui immersive html  Basically  you should add this code to your onResume   method   View decorView   getWindow   getDecorView    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

User · Answer

AFAIK  this is not possible without root access  It would be a security issue to be able to have an app that cannot be exited with system buttons   Edit  see here  Hide System Bar in Tablets

User · Answer

My solution  to only hide the navigation bar  is   protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState        final View decorView   getWindow   getDecorView        decorView setOnSystemUiVisibilityChangeListener  new View OnSystemUiVisibilityChangeListener              Override         public void onSystemUiVisibilityChange int visibility                if   visibility  amp  View SYSTEM UI FLAG FULLSCREEN     0                    decorView 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                                       Override protected void onResume         super onResume        final int uiOptions   View SYSTEM UI FLAG HIDE NAVIGATION      final View decorView   getWindow   getDecorView        decorView setSystemUiVisibility uiOptions

User · Answer

You can There are Two ways  both requiring device root    1- First way  open the device in adb window command  and then run the following   adb shell  gt   pm disable-user --user 0 com android systemui  gt   and to get it back just do the same but change disable to enable  2- second way  add the following line to the end of your device s build prop file   qemu hw mainkeys   1  then to get it back just remove it  and if you don t know how to edit build prop file   download EsExplorer on your device and search for build prop then change it s permissions to read and write  finally add the line  download a specialized build prop editor app like build propEditor  or refer to that link

User · Answer

Start by hiding in OnResume   of the activity then also keep hiding as shown below   decorView setOnSystemUiVisibilityChangeListener                  new View OnSystemUiVisibilityChangeListener                          Override                     public void onSystemUiVisibilityChange int visibility                               Note that system bars will only be  visible  if none of the                            LOW PROFILE  HIDE NAVIGATION  or FULLSCREEN flags are set                          if   visibility  amp  View SYSTEM UI FLAG FULLSCREEN     0                                  visible                             hideSystemUI                                                                                                     public 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          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    hide nav bar                           View SYSTEM UI FLAG FULLSCREEN    hide status bar                           View SYSTEM UI FLAG IMMERSIVE

User · Answer

Change the theme in your manifest   If you want to hide nav bar for one activity you can use this    lt activity         android name  Activity Name          android theme   android style Theme Black NoTitleBar          android label   string app name   gt    If you want to hide nav bar for entire application you can use this    lt application     android allowBackup  true      android icon   drawable ic launcher      android label   string app name      android theme   android style Theme Black NoTitleBar   gt

[android] Permanently hide Navigation Bar in an activity

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