Я пытаюсь получить доступ к деятельности через фрагмент

Question

Ниже приведен код:

public class HomeFragment extends Fragment {
    private Button button;

    private HomeViewModel homeViewModel;

    public View onCreateView(@NonNull LayoutInflater inflater,
                             ViewGroup container, Bundle savedInstanceState) {
        homeViewModel =
                ViewModelProviders.of(this).get(HomeViewModel.class);
        View root = inflater.inflate(R.layout.fragment_home, container, false);
        final TextView textView = root.findViewById(R.id.text_home);
        homeViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
            @Override
            public void onChanged(@Nullable String s) {
                textView.setText(s);
            }
        });
        button=root.findViewById(R.id.btnScanBarcode);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent (getContext(), PictureBarcodeActivity.class);
                startActivity(intent);
            }
        });
        return root;
    }

Ниже приведена трассировка ошибок из logcat

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.finalettendance, PID: 25608
    android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.finalettendance/com.example.finalettendance.PictureBarcodeActivity}; have you declared this activity in your AndroidManifest.xml?
        at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1794)
        at android.app.Instrumentation.execStartActivity(Instrumentation.java:1512)
        at android.app.Activity.startActivityForResult(Activity.java:3917)
        at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:675)
        at androidx.core.app.ActivityCompat.startActivityForResult(ActivityCompat.java:234)
        at androidx.fragment.app.FragmentActivity.startActivityFromFragment(FragmentActivity.java:790)
        at androidx.fragment.app.FragmentActivity$HostCallbacks.onStartActivityFromFragment(FragmentActivity.java:932)
        at androidx.fragment.app.Fragment.startActivity(Fragment.java:1257)
        at androidx.fragment.app.Fragment.startActivity(Fragment.java:1245)
        at com.example.finalettendance.ui.home.HomeFragment$2.onClick(HomeFragment.java:44)
        at android.view.View.performClick(View.java:5198)
        at android.view.View$PerformClick.run(View.java:21147)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Answer 1

Просто прочитайте logcat:

android .content.ActivityNotFoundException: невозможно найти "явный класс действия {com.example.finalettendance / com.example.finalettendance.PictureBarcodeActivity}; вы объявили это действие в вашем AndroidManifest. xml? "

Проверьте, объявили ли вы активность в манифесте.