Category: Java

List<Book> bookList     =   new ArrayList<Book>();
List<Book> removeList   =   new ArrayList<Book>();

for(Book book:bookList){
    // add if statement to decide to remove from list
    removeList.add(book);
}

bookList.removeAll(removeList);

You need to add if statment before removeList.add(book) line to delete element from list.

In Fragment

// Hide status bar
View windowDecorView = requireActivity().getWindow().getDecorView(); 
windowDecorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);

// Show status bar
View windowDecorView = requireActivity().getWindow().getDecorView(); 
windowDecorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);

In Activity

// Hide status bar
View windowDecorView = getWindow().getDecorView(); 
windowDecorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);

// Show status bar
View windowDecorView = getWindow().getDecorView(); 
windowDecorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);

        AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
        builder.setTitle("Test");
        builder.setMessage("Uygulama bilgilerini görüntülemek ister misiniz?");
        builder.show();