从片段打开的活动立即关闭

Question

您好，我想从我的片段转移到另一个活动。我几乎尝试了找到的所有解决方案，但是在按下按钮后，我的应用程序立即关闭。我是java新手，我想我需要一些帮助。

public class GalleryFragment extends Fragment {

    private GalleryViewModel galleryViewModel;

    Intent intent;

    public View onCreateView(@NonNull LayoutInflater inflater,

                             ViewGroup container, Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_gallery, container, false);

        intent = new Intent(GalleryFragment.this.getActivity(), HomeFragment.class);

        final Button btn = (Button) rootView.findViewById(R.id.btn);

        btn.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                startActivity(intent);

            }

        });

        galleryViewModel =

                ViewModelProviders.of(this).get(GalleryViewModel.class);

        View root = inflater.inflate(R.layout.fragment_gallery, container, false);

        final TextView textView = root.findViewById(R.id.text_gallery);

        galleryViewModel.getText().observe(this, new Observer<String>() {

            @Override

            public void onChanged(@Nullable String s) {

                textView.setText(s);

            }

        });

        return root;

    }

}

Answer 1

我从这一行假设：intent = new Intent(GalleryFragment.this.getActivity(), HomeFragment.class);您正在尝试启动Fragment，而不是Activity. 为了转换到另一个Fragment，请将您的替换Intent为：&nbsp;btn.setOnClickListener(new View.OnClickListener() {&nbsp; &nbsp; @Override&nbsp; &nbsp; public void onClick(View view) {&nbsp; &nbsp; &nbsp; &nbsp; getFragmentManager()&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; .beginTransaction()&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; .replace(...) //Or add, depends on your use case&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; .commit();&nbsp; &nbsp; }});