Fragment error when applying to CrimeFragment - unable to solve

Android Programming (3rd Edition) 13. The Toolbar
1

In this section of CrimeFragment.java, I’m getting two errors:

        mDateButton = (Button) v.findViewById(R.id.crime_date);
        updateDate();
        mDateButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentManager manager = getFragmentManager();
                DatePickerFragment dialog = DatePickerFragment
                        .newInstance(mCrime.getDate());
             Error 1  ->> dialog.setTargetFragment(CrimeFragment.this, REQUEST_DATE);
             Error 2  ->> dialog.show(manager, DIALOG_DATE);
            }
        });

First line is getting:

‘setTargetFragment(android.app.Fragment, int)’ in ‘android.app.Fragment’ cannot be applied to ‘(com.criminalintent.CrimeFragment, int)’

– For this one - it appears to be having a big problem recognizing CrimeFragment as a fragment - so I can’t tell if its doing something wrong when it “extends” Fragment. I’m using the copied code from the distributable file (full list below), and even with that - I get these errors.

Second line is getting:

Cannot resolve method ‘show(androidx.fragment.app.FragmentManager, java.lang.String)’

– I can add a method for ‘show’ in DatePickerFragment.java - but I don’t know what to build out in there to get it to dispaly the DIALOG_DATE fragment correctly (if that’s the correct solution.)

FULL CrimeFragment.java file:


import static android.widget.CompoundButton.OnCheckedChangeListener;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;

import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;

import java.util.Date;
import java.util.UUID;

public class CrimeFragment extends Fragment {

    private static final String ARG_CRIME_ID = "crime_id";
    private static final String DIALOG_DATE = "DialogDate";

    private static final int REQUEST_DATE = 0;

    private Crime mCrime;
    private EditText mTitleField;
    private Button mDateButton;
    private CheckBox mSolvedCheckbox;

    public static CrimeFragment newInstance(UUID crimeId) {
        Bundle args = new Bundle();
        args.putSerializable(ARG_CRIME_ID, crimeId);

        CrimeFragment fragment = new CrimeFragment();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        UUID crimeId = (UUID) getArguments().getSerializable(ARG_CRIME_ID);
        mCrime = CrimeLab.get(getActivity()).getCrime(crimeId);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_crime, container, false);

        mTitleField = (EditText) v.findViewById(R.id.crime_title);
        mTitleField.setText(mCrime.getTitle());
        mTitleField.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                mCrime.setTitle(s.toString());
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

        mDateButton = (Button) v.findViewById(R.id.crime_date);
        updateDate();
        mDateButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentManager manager = getParentFragmentManager();
                DatePickerFragment dialog = DatePickerFragment
                        .newInstance(mCrime.getDate());
                dialog.setTargetFragment(CrimeFragment.this,
                        REQUEST_DATE);
                dialog.show(manager, DIALOG_DATE);
            }
        });

        mSolvedCheckbox = (CheckBox) v.findViewById(R.id.crime_solved);
        mSolvedCheckbox.setChecked(mCrime.isSolved());
        mSolvedCheckbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView,
                                         boolean isChecked) {
                mCrime.setSolved(isChecked);
            }
        });

        return v;
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode != Activity.RESULT_OK) {
            return;
        }

        if (requestCode == REQUEST_DATE) {
            Date date = (Date) data
                    .getSerializableExtra(DatePickerFragment.EXTRA_DATE);
            mCrime.setDate(date);
            updateDate();
        }
    }

    private void updateDate() {
        mDateButton.setText(mCrime.getDate().toString());
    }
}
2

Ok - I figured out one issue.

In the DatePickerFragment.java file that accompanies this - the import statement was pulling a different version of DialogFragment. I updated that to the same prefix setup:

import androidx.fragment.app.DialogFragment;

and that change fixed the issue. Originally setup as:

import android.support.v4.app.DialogFragment; and then I attempted to load:

import android.fragment.app.DialogFragment; which is apparently different.