Snippets:
HideNavigationBarComponent.java
This is for Android 4.4+
Try out immersive mode https://developer.android.com/training/system-ui/immersive.html
Fast snippet (for an Activity class):
private int currentApiVersion;
@Override
@SuppressLint("NewApi")
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
currentApiVersion = android.os.Build.VERSION.SDK_INT;
final int flags = 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;
// This work only for android 4.4+
if(currentApiVersion >= Build.VERSION_CODES.KITKAT)
{
getWindow().getDecorView().setSystemUiVisibility(flags);
// Code below is to handle presses of Volume up or Volume down.
// Without this, after pressing volume buttons, the navigation bar will
// show up and won't hide
final View decorView = getWindow().getDecorView();
decorView
.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener()
{
@Override
public void onSystemUiVisibilityChange(int visibility)
{
if((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0)
{
decorView.setSystemUiVisibility(flags);
}
}
});
}
}
@SuppressLint("NewApi")
@Override
public void onWindowFocusChanged(boolean hasFocus)
{
super.onWindowFocusChanged(hasFocus);
if(currentApiVersion >= Build.VERSION_CODES.KITKAT && hasFocus)
{
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);
}
}
If you have problems when you press Volume up or Volume down that your navigation bar show. I added code in onCreate see setOnSystemUiVisibilityChangeListener
Here is another related question:
Immersive mode navigation becomes sticky after volume press or minimise-restore