ActionBar appears when i press on Edittext and when i finish typing and close the keyboard it is still there

Question

Is there anyway to permanently remove this actionbar? I tried these two ways but they didn't work:

this ..

    <item name="windowNoTitle">true</item>
    <item name="windowActionBar">false</item>

and this ...

    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);

First activity:

When i click on EditText:

Answer 1

That is not the ActionBar it is called the Status bar in android. Because it persists the status of some important utilities like your network and battery status.

Coming to your question.

FOR Android 4.0 and Lower

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

FOR Android 4.1 and Higher

View decorView = getWindow().getDecorView();

int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
//if you have action bar present make sure to hide it
ActionBar actionBar = getActionBar();
actionBar.hide();