CODE EXAMPLE FOR JAVA

android:windowLightStatusBar programmatically

if (on) {
    View view = getWindow().getDecorView();
    view.setSystemUiVisibility(view.getSystemUiVisibility() | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
} else {
    View view = getWindow().getDecorView();
    view.setSystemUiVisibility(view.getSystemUiVisibility() & ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
}