Invoking intent from a fragment

问题

I have a fragment

public class TwitterFragment extends Fragment implements OnClickListener {}

From this fragment I am invoking an intent as:

Intent intent = new Intent(this, WebViewActivity.class);

where,

public class WebViewActivity extends Activity {

But Invoking intent is giving error:

Error:(214, 33) error: no suitable constructor found for Intent(TwitterFragment,Class<WebViewActivity>)
constructor Intent.Intent(String,Uri) is not applicable
(argument mismatch; TwitterFragment cannot be converted to String)
constructor Intent.Intent(Context,Class<?>) is not applicable
(argument mismatch; TwitterFragment cannot be converted to Context)

This code was working when TwitterFragment class extends Activity instead of fragment.

回答1:

Fragment is not a Context. Try this:

Intent intent = new Intent(getActivity(), WebViewActivity.class);

回答2:

Intent demands a Context as its first parameter. Do this:

Intent intent = new Intent(getActivity(), YourTargetClass.class);

And to actually start your Activity, do this:

getActivity().startActivity(intent);

Fragment doesn't extend Context, so it borrows it from its housing Activity. That is why you can't get your Intent working the first time you try it.

回答3:

Get the activity for the context parameter

Intent intent = new Intent(getActivity(), WebViewActivity.class);

回答4:

Use getActivity() instead of this. Intent intent = new Intent(getActivity(), WebViewActivity.class);

来源：https://stackoverflow.com/questions/31419891/invoking-intent-from-a-fragment