CODEWITHSUNDEEP
javaandroidandroid-studiofragmentadapter
MexiCano
MexiCano

Reputation: 362

Call Fragment Activity error Unable to instantiate activity. cannot be cast to android.app.Activity

I need help , for onclick on recyclerview and open new fragment activity, im clicked in item list close app and logcat error is: Unable to instantiate activity ComponentInfo{com.example.divemex/com.example.works.Pem}: java.lang.ClassCastException: com.example.works.Pem cannot be cast to android.app.Activity

My code adapter:

@Override
    public void onBindViewHolder(final tramoView tramoView, final int i) {
        final TramoModel tramoModel = tramoList.get(i);
        tramoView.txtnombreMostrar.setText(tramoModel.getTramoName());
        tramoView.txtnombreMostrar.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               Intent intent =  new Intent(v.getContext(), Pem.class);
                v.getContext().startActivity(intent);
            } });
    }

My code class fragment:

public class Pem extends  Fragment {

    private TabAdapter adapter;
    private TabLayout tableLayout;
    private ViewPager viewPager;

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

        viewPager = view.findViewById(R.id.request_orders_view_pager);
        tableLayout = view.findViewById(R.id.request_orders_tabs);

        adapter = new TabAdapter(getFragmentManager());
       // adapter = new TabAdapter(FragmentActivity.getSupportFragmentManager());
        adapter.addFragment(new fragment1(), "Tab 1");
        adapter.addFragment(new fragment2(), "Tab 2");
        adapter.addFragment(new fragment3(), "Tab 3");
        adapter.addFragment(new fragment4(), "Tab 4");

        viewPager.setAdapter(adapter);
        tableLayout.setupWithViewPager(viewPager);

        return view;
    }
}

Error :

Error

Upvotes: 1

Views: 680

Answers (2)

Zain
Zain

Reputation: 40830

You are trying to deal with fragments like activities. One of Intents purpose is to start new activities, but not fragments.

You got an exception in below line of code, because you use an Intent to start a Fragment (as Pem.class is a fragment); and fragments can't start this way.

Intent intent =  new Intent(v.getContext(), Pem.class);

And this is obvious in the Exception you got java.lang.ClassCastException: com.example.works.Pem cannot be cast to android.app.Activity

Which indicates that it's not allowed to cast Pem.class to an Activity; that is because it doesn't extend Activity class or any of its sub-classes.

To solve this, either:

  1. Make Pem.class an Activity by extending AppCompatActivity class (or any activity class), and replace the activity's callback methods instead of the fragment ones.
  2. Or Make fragment transaction in the current activity and here you can find details

Upvotes: 1

peerless2012
peerless2012

Reputation: 209

You use this : Intent intent = new Intent(v.getContext(), Pem.class); v.getContext().startActivity(intent);

But Pem is a Fragment, not an Activity.

Upvotes: 0

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