A really simple application that has fragments, I am having an activity that holds a CalendarView that opens up from a side navigation drawer. When you open the "logs" fragment, it'll send you to the CalendarActivity for you to choose a date you want to log information on. However, the application crashes when you do this, I found out if you remove the line "logCalendar = (CalendarView) findViewById(R.id.logCalendar);" it won't crash, but obviously I now can't use the calendar to get a date.
Does anyone know why it's crashing, or any other solutions that provide the same solution to what I want to achieve.
Thanks.
CalendarActivity class
public class CalendarActivity extends AppCompatActivity {
private static final String TAG = "CalendarActivity";
private CalendarView logCalendar;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_calendar);
logCalendar = (CalendarView) findViewById(R.id.logCalendar);
logCalendar.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
@Override
public void onSelectedDayChange(@NonNull CalendarView view, int year, int month, int dayOfMonth) {
String date = dayOfMonth + "/" + month +"/" + year;
Log.d(TAG, "onSelectedDayChange: date:" + date);
}
});
}
}
Class that opens the CalenderActivity class
private TextView currentDate;
private Button dateButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_logs, container, false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
currentDate = (TextView) view.findViewById(R.id.currentDate);
dateButton = (Button) view.findViewById(R.id.dateButton);
Intent intent = new Intent(getActivity(), CalendarActivity.class);
startActivity(intent);
super.onViewCreated(view, savedInstanceState);
}
}
My Logcat
2020-12-20 16:45:53.987 28316-28316/com.example.co3201weighttrainingapplication E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.co3201weighttrainingapplication, PID: 28316
java.lang.ClassCastException: com.applandeo.materialcalendarview.CalendarView cannot be cast to android.widget.CalendarView
at com.example.co3201weighttrainingapplication.LogsFragment.onViewCreated(LogsFragment.java:48)
at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:332)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1187)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1356)
at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1434)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1497)
at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:447)
at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2169)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1992)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1947)
at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1849)
at androidx.fragment.app.FragmentManager$4.run(FragmentManager.java:413)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
the logcat you have posted explains the error itself. see this line :-
java.lang.ClassCastException: com.applandeo.materialcalendarview.CalendarView cannot be cast to android.widget.CalendarView
.
It looks like you have imported android
native calendarView
instead of your material calendar view
. Check your imports
in your CalendarActivity class
and you might find something like this :- import android.widget.CalendarView;
remove that and change it to import com.applandeo.materialcalendarview.CalendarView;
. I am assuming you are using applandeo
material calendar view from this site.