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

Question

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

score 1 · Accepted Answer · answered Apr 28 '20 at 03:40

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:

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.
Or Make fragment transaction in the current activity and here you can find details

score 0 · Answer 2 · answered Apr 28 '20 at 03:13

0

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

But Pem is a Fragment, not an Activity.

answered Apr 28 '20 at 03:13

peerless2012

179
1
7

Which `XXXActivity` you want to jump, the second param willbe the `XXXActivity.class` will be use. – peerless2012 Apr 28 '20 at 03:33

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

2 Answers2