带有意图的片段中的 onclicklistener

Question

Good morning together,

i have an an android app with an Intro class. This Intro class has got three fragments.

in fragment 3 (IntroPage3) i would like to set an onclicklistener with an intent form the IntroPage3 to Overview.class like this:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    FragementView = inflater.inflate(R.layout.intro_page1, container, false);

    Button FinishIntroButton = (Button) FragementView.findViewById(R.id.FinishIntroButton);
    FinishIntroButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            intent = new Intent(IntroPage3.this, Overview.class);
            startActivityForResult(intent, 0);
        }
    });


    return FragementView;
}

Problem: is this line:

intent = new Intent(IntroPage3.this, Intro.class);

Error message:

Any ideas? :)

Answer 1

使用intent = new Intent(getActivity(), Overview.class);

Answer 2

You must use getActivity() instead of IntroPage3.this

WHY

getActivity() in a Fragment returns the Activity the Fragment is currently associated with.

Button FinishIntroButton = (Button) FragementView.findViewById(R.id.FinishIntroButton);
FinishIntroButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        intent = new Intent(getActivity(), Overview.class);
        startActivityForResult(intent, 0);
    }
});

Answer 3

public class Fragment3 extends Fragment{

@Nullable
@Override
public View onCreateView(@NonNull final LayoutInflater inflater, @Nullable final ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view;
    view = inflater.inflate(R.layout.page_4, container, false);
    Button button=view.findViewById(R.id.exit);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          Intent intent;
          intent=new Intent(getActivity(),FragmentLogin.class);
          startActivity(intent);

        }
    });




    return view;


}

}