如何以全屏模式显示图像

Question

点击图片后，图片应在android中以全屏模式打开。 我正在使用GitHub的翻转视图寻呼机。我得到了与GitHub链接相同的所有布局和功能。但我想在同一个屏幕上添加更多功能，以全屏方式打开图像。

    final ListView friends = (ListView) inflater.inflate(R.layout.activity_friends,container,false);
    FlipSettings settings=new FlipSettings.Builder().defaultPage(1).build();
    friends.setAdapter(new FriendsAdapter(getActivity(), Utils.friends,settings));
    friends.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Friend friend = (Friend) friends.getAdapter().getItem(position);

                    final Dialog nagDialog = new Dialog(getActivity(),android.R.style.Theme_Translucent_NoTitleBar_Fullscreen);
                    nagDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
                    nagDialog.setCancelable(false);
                    nagDialog.setContentView(R.layout.preview_image);
                    Button btnClose = (Button)nagDialog.findViewById(R.id.btnIvClose);
                   //ImageView ivPreview = (ImageView)nagDialog.findViewById(R.id.first);
                    //ivPreview.setBackground(dd);

                    btnClose.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View arg0) {

                            nagDialog.dismiss();
                        }
                    });
                    nagDialog.show();

            Toast.makeText(getContext(), friend.getNickname(), Toast.LENGTH_SHORT).show();
        }
    });
     return friends;

https://github.com/Yalantis/FlipViewPager.Draco

请找到整个代码的上述链接。