button.setOnClickListener(new View.OnClickListener() { boolean show = true;
@Override public void onClick(View v) { Toast.makeText(MainActivity.this, "CLICK", Toast.LENGTH_SHORT).show(); if (show) { toolbar.animate().translationY(-toolbar.getBottom()).setInterpolator(new AccelerateInterpolator()).start(); hideSystemUI(); show = false; } else { toolbar.animate().translationY(0).setInterpolator(new DecelerateInterpolator()).start(); showSystemUI(); show = true; } } }); 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. 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 // hide nav bar | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar | View.SYSTEM_UI_FLAG_IMMERSIVE); } private void showSystemUI() { 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); } <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="
http://schemas.android.com/apk/res/android" xmlns:app="
http://schemas.android.com/apk/res-auto" xmlns:tools="
http://schemas.android.com/tools" android:id="@+id/rootView" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#000" android:fitsSystemWindows="true" tools:context=".MainActivity"> .....
Не забудьте установить для fitsSystemWindows значение true