Android get full width for custom Dialog

Question

in my application my created custom dialog dont have full height and i can not change and customize that.for example see this screen shot:

Answer 1

MyDialogFragment myDialogFragment = 
    new MyDialogFragment(activity,arraylist.get(position).getImage());
                                myDialogFragment.show();

Window window = myDialogFragment.getWindow();
        window.setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT);