在TextView上继续进行其他活动和/或片段，请单击

Question

this is some text lyl this is some text lyl this is some text lylthis is some text lyl this is some text lyl this is some text lyl

 public void click(View v){
    Intent intent;
    switch(v.getId()){
        case R.id.nav_Courses:
            fragment = new CoursesActivity();
            break;

Answer 1

Try this to open an Activity from your Fragment .

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

        final Textview textview = view.findViewById(R.id.date_apr);
        textview.setOnClickListener(new OnClickListener() {
           @Override
           public void onClick(View v) {
              Intent intent = new Intent(getActivity(), ItemDetailActivity.class);
              startActivity(intent);
           }
          });
        return view;
    }

To open a Fragment you can use this code in another onclickListener.

FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.container,new CoursesActivity,"");
transaction.addToBackStack(null);
transaction.commit();

container is the FrameLayout of your first Fragment.