Question

我有2个片段A和B.首先打开一个片段，有一个按钮。 onButtonClick它转到片段B.在片段B中，用户选择一些语言或其他东西，onButtonClick来到片段A.所以当谈到片段A并且我点击电话时，它会进入再回到片段B.我希望当片段B中的用户选择一些信息，语言和其他东西，然后点击下一个按钮时，它就会被破坏。像这样的东西。当它从A到B时，然后在选择信息从B到A之后我想要破坏B片段。在片段中，我无法覆盖onBackPressed方法，因为这是针对活动的。有任何想法吗？在互联网上找到一些样本，但他们没有帮助。如果您需要代码请说。谢谢你的帮助。

好的，这是片段A。

public class PersonalInfoFragment extends BaseFragment {

View mainView;

public static final String TEXT = "TEXT";

TextView dots;
EditText skills_description;
Button clear, save, languages;

CircleImageView circleImageView1, circleImageView2, circleImageView3,
        circleImageView4, circleImageView5, circleImageView6;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    mainView = inflater.inflate(R.layout.personal_info, container, false);
    init(mainView);

    Bundle bundle = getArguments();
    if (bundle != null) {
        ArrayList<Integer> s = bundle.getIntegerArrayList("IMAGE");
        if (s != null) {
            for (int i = 0; i < s.size(); i++) {
                switch (i) {
                    case 0:
                        circleImageView1.setImageResource(s.get(i));
                        break;
                    case 1:
                        circleImageView2.setImageResource(s.get(i));
                        break;
                    case 2:
                        circleImageView3.setImageResource(s.get(i));
                        break;
                    case 3:
                        circleImageView4.setImageResource(s.get(i));
                        break;
                    case 4:
                        circleImageView5.setImageResource(s.get(i));
                        break;
                    case 5:
                        circleImageView6.setImageResource(s.get(i));
                        break;
                    default:
                        break;
                }
            }
        }
    }
    return mainView;
}


private void init(View v) {
    skills_description = v.findViewById(R.id.skills);
    clear = v.findViewById(R.id.clear);
    languages = v.findViewById(R.id.select_language);
    dots = v.findViewById(R.id.dots);
    save = v.findViewById(R.id.save);

    circleImageView1 = v.findViewById(R.id.language1);
    circleImageView2 = v.findViewById(R.id.language2);
    circleImageView3 = v.findViewById(R.id.language3);
    circleImageView4 = v.findViewById(R.id.language4);
    circleImageView5 = v.findViewById(R.id.language5);
    circleImageView6 = v.findViewById(R.id.language6);

    clear.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            skills_description.setText("");
        }
    });

    languages.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            getFragmentManager().beginTransaction().replace(R.id.container,
                    new FragmentLanguage()).addToBackStack(null).commit();
        }
    });

    save.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

        }
    });
}}

在languages.setOnClickListener上，它会转到片段B。

languages.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            getFragmentManager().beginTransaction().replace(R.id.container,
                    new FragmentLanguage()).addToBackStack(null).commit();
        }
    });

这是片段B。

public class FragmentLanguage extends BaseFragment {

public static final String TEXT = "TEXT";


MyAdapter adapter;

View mainView;
ListView listView;

Button next;

PersonalInfoFragment info = new PersonalInfoFragment();


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    mainView = inflater.inflate(R.layout.listview, container, false);
    listView = mainView.findViewById(R.id.list_view);

    fillData();
    showResult();

    return mainView;
}


public void fillData() {

    ArrayList<Item_obj> objS = new ArrayList<>();

    //Array list of Languages
    objS.add(new Item_obj("Armenian", R.drawable.download, false));
    objS.add(new Item_obj("Russian", R.drawable.russian, false));
    objS.add(new Item_obj("US English", R.drawable.usa, false));
    objS.add(new Item_obj("Portugal", R.drawable.france, false));
    objS.add(new Item_obj("Spanish", R.drawable.italy, false));
    objS.add(new Item_obj("Georgian", R.drawable.download, false));
    objS.add(new Item_obj("French", R.drawable.download, false));
    objS.add(new Item_obj("Italian", R.drawable.download, false));
    adapter = new MyAdapter(getActivity(), objS);
    listView.setAdapter(adapter);
}

public void showResult() {
    next = mainView.findViewById(R.id.next);
    clear = mainView.findViewById(R.id.clear_lang);

    next.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            ArrayList<Item_obj> it = adapter.getCheck();

            Bundle bundle = new Bundle();
            ArrayList<Integer> list = new ArrayList<>();
            for (int i = 0; i < adapter.getCheck().size(); i++) {
                Item_obj items = it.get(i);
                if (items.isSelected) {
                    list.add(items.image);
                }
            }

            if (list.size() > 6) {
                Toast.makeText(getActivity(), "You can't select more than 6 elements", Toast.LENGTH_SHORT).show();
                list.clear();
            }

            bundle.putIntegerArrayList("IMAGE", list);
            info.setArguments(bundle);

            getFragmentManager().beginTransaction().replace(R.id.container, info).addToBackStack(null).commit();
            listView.setAdapter(adapter);
        }
    });
}}

在next.setOnClickListener中，它会再次返回到包含所选语言的片段A.

Answer 1

fragmentTransaction.remove(yourfragment).commit()

添加到onBackPressed（）或将意图从B设置为A

Answer 2

不要从FragmentLanguage片段创建一个新的PersonalInfoFragment实例，而是按下下一个按钮，你应该通过创建一个带接口的回调并调用onBackPressed方法将bundle值传递给PersonalInfoFragment。

FragmentLanguage中的回调创建代码：

private OnNextClickListener mOnNextClickListener;

interface OnNextClickListener{
    void onNextButtonClicked(Bundle bundle);
}

public void setOnNextClickListener(OnNextClickListener 
 mOnNextClickListener) {
    this.mOnNextClickListener = mOnNextClickListener;
}

调用mOnNextClickListener.onNextButtonClicked（bundle）;按下下一个按钮并在PersonalInfoFragment中实现界面。

如何在背面按

2 个答案: