The method makeText in the type Toast is not applicable for the arguments

问题:

I am using a ViewPageIndicator and trying to use a Toast to display when we scroll to the next fragment page.

i am getting he following error

The method makeText(Context, CharSequence, int) in the type Toast is not applicable for the arguments (PlaceDetailsFragment, String, int) 

PlaceDetailsFragment.java

public class PlaceDetailsFragment extends SherlockFragment {     ImageFragmentAdapter mAdapter;     ViewPager mPager;     PageIndicator mIndicator;      @Override     public View onCreateView(LayoutInflater inflater, ViewGroup container,             Bundle savedInstanceState) {         View view = inflater.inflate(R.layout.fragment_place_details, container,                 false);          mAdapter = new ImageFragmentAdapter(getActivity()                 .getSupportFragmentManager());          mPager = (ViewPager) view.findViewById(R.id.pager);         mPager.setAdapter(mAdapter);          mIndicator = (CirclePageIndicator) view.findViewById(R.id.indicator);         mIndicator.setViewPager(mPager);         ((CirclePageIndicator) mIndicator).setSnap(true);          mIndicator.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {             @Override             public void onPageSelected(int position) {                 Toast.makeText(PlaceDetailsFragment.this, "Changed to page " + position, Toast.LENGTH_SHORT).show();             }              @Override             public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {             }              @Override             public void onPageScrollStateChanged(int state) {             }         });         return view;     }  } 

回答1:

Fragments don't extend context. You have to get the activity to pass as the context.

Toast.makeText(PlaceDetailsFragment.this.getActivity(), "Changed to page " + position, Toast.LENGTH_SHORT).show(); 

回答2:

PearsonArtFoto already gave you the answer, but I like to add some information: You have to use getActivity() since you are not calling this inside an Activity(or something that extends Activity). Activity is a context(it extends context), fragment does not.

回答3:

use container parameter of fragment

Toast.makeText(container.getContext(), picture, Toast.LENGTH_LONG).show(); 

文章来源: The method makeText in the type Toast is not applicable for the arguments