Question

我无法通过Android应用程序中的按钮从一个片段导航到另一个片段。我已经考虑了几个关于这个问题的问题，但提供的解决方案并没有解决我的问题。这是我的代码，我不知道我做错了什么。

public class fragment_profile extends Fragment {

TextView txtFname, txtLname, txtGender, txtAge, txtPhone, txtEmail;
Button btImages, btVideos;
ImageButton btProfilePic;

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_profile, container, false);


    btProfilePic = (ImageButton)rootView.findViewById(R.id.ProfilePic);

    txtFname = (TextView)rootView.findViewById(R.id.tvFName);
    txtLname = (TextView)rootView.findViewById(R.id.tvLName);
    txtGender = (TextView)rootView.findViewById(R.id.tvGender);
    txtAge = (TextView)rootView.findViewById(R.id.tvAge);
    txtPhone = (TextView)rootView.findViewById(R.id.tvPhone);
    txtEmail = (TextView)rootView.findViewById(R.id.tvEmail);

    btImages = (Button)rootView.findViewById(R.id.btnImages);
    btVideos = (Button)rootView.findViewById(R.id.btnVideos);


    //The code to replace fragment is not good, the clicklistener is working fine as I have tested it with a toast message

    btImages.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            FragmentManager fragmentManager = getFragmentManager();

            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

            //An object of the fragment tree is created
            fragmentImages ImageGallery = new fragmentImages();
            //The fragment is finally added
            fragmentTransaction.replace(R.id.fragment_profile, ImageGallery, "Image Gallery").commit();
            //Set title of action bar = title of fragment
            getActivity().setTitle(getTag());
        }
    });

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



            FragmentManager fragmentManager = getFragmentManager();

            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

            //An object of the fragment tree is created
            fragmentVideos VideoGallery = new fragmentVideos();
            //The fragment is finally added
            fragmentTransaction.replace(R.id.fragment_profile, VideoGallery, "Video Gallery").commit();
            //Set title of action bar = title of fragment
            getActivity().setTitle(getTag());
        }
    });


    return rootView;
}
}

问题出在onClickListener内的代码中。谁能告诉我我做错了什么？谢谢。

Answer 1

您想使用supportFragmentManager。在onClickListener（s）中，进行以下交易：

//An object of the fragment tree is created
fragmentImages ImageGallery = new fragmentImages();

getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.fragment_profile, ImageGallery).commit();

//rest of your setting the activity title below

最佳做法是将您的类编写为FragmentImages，然后将变量编写为imageGallery，例如fragmentImages，以便了解对象是什么。

Answer 2

我认为你必须将你的fragment_profile片段添加到backstack中，这样你就可以在触发其他片段之后再调用它。请尝试以下方法：

fragmentTransaction.replace(R.id.fragment_profile, ImageGallery, "Image Gallery").addToBackStack(null).commit();

与后者相同：

fragmentTransaction.replace(R.id.fragment_profile, VideoGallery, "Video Gallery").addToBackStack(null).commit();

我从这里得到了信息：Fragment Replacing Existing Fragment

我可以通过fragment1上的按钮从一个片段（fragment1）导航到另一个片段（fragment2）吗？

2 个答案: