FragmentHost has ViewPager, and Fragments of viewpager need data from FragmentHost to create their views.
How to get the data. The data is custom Class.
One way is using Serializable implementation of the custom class. But I want to avoid that, as the class contains array and Map of other custom classes.
Also there can be multiple instances of FragmentHost active at a time, one FragmentHost per activity.
Check this out for communication
public class CrimePagerActivity extends AppCompatActivity {
private static final String EXTRA_CRIME_ID = "com.android.ankitt.criminalintent.activities.extra.crime.id";
private ViewPager mViewPager;
private List<Crime> mCrimes;
public static Intent newIntent(Context packageContext, UUID crimeId) {
Intent intent = new Intent(packageContext, CrimePagerActivity.class);
intent.putExtra(EXTRA_CRIME_ID, crimeId);
return intent;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_crime_pager);
UUID crimeId = (UUID) getIntent().getSerializableExtra(EXTRA_CRIME_ID);
mViewPager = (ViewPager) findViewById(R.id.actvity_crime_pager_view_pager);
mCrimes = CrimeLab.get(this).getCrimes();
FragmentManager manager = getSupportFragmentManager();
mViewPager.setAdapter(new FragmentPagerAdapter(manager) {
@Override
public Fragment getItem(int position) {
Crime crime = mCrimes.get(position);
return CrimeFragment.newInstance(crime.getId());
}
@Override
public int getCount() {
return mCrimes.size();
}
});
for (int i = 0; i < mCrimes.size(); i++) {
if (mCrimes.get(i).getId().equals(crimeId)) {
mViewPager.setCurrentItem(i);
break;
}
}
}
}
Fragment
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(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/*mCrime = new Crime();*/
/*UUID crimeId = (UUID)getActivity().getIntent().getSerializableExtra(CrimeActivity.EXTRA_CRIME_ID);*/
UUID crimeId = (UUID) getArguments().getSerializable(ARG_CRIME_ID);
mCrime = CrimeLab.get(getActivity()).getCrime(crimeId);
mFilePhoto = CrimeLab.get(getActivity()).getPhotoFile(mCrime);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_crime, container, false);
mEditText = (EditText) view.findViewById(R.id.crime_title);
mEditText.setText(mCrime.getTitile()); //Updating Crime fragment with crime
mEditText.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.setTitile(toString());
}
@Override
public void afterTextChanged(Editable s) {
}
});
final Intent pickContact = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
/*pickContact.addCategory(Intent.CATEGORY_HOME);*/
mSuspectButton = (Button) view.findViewById(R.id.crime_suspect);
mSuspectButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivityForResult(pickContact, REQUEST_CONTACT);
}
});
mReportButton = (Button) view.findViewById(R.id.crime_report);
mReportButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_TEXT, getCrimeReport());
intent.putExtra(Intent.EXTRA_SUBJECT, getString(R.string.crime_report_subject));
intent = Intent.createChooser(intent, getString(R.string.send_report));
startActivity(intent);
}
});
mDateButton = (Button) view.findViewById(R.id.crime_date);
updateDate((mCrime.getDate()).toString());
/*mDateButton.setEnabled(false);*/
/* Design a date picker for an application */
mDateButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FragmentManager fragmentManager = getFragmentManager();
/*DatePickerFragment dialog = new DatePickerFragment();*/
DatePickerFragment dialog = DatePickerFragment.newInstance(mCrime.getDate());
dialog.setTargetFragment(CrimeFragment.this, REQUEST_DATE);
dialog.show(fragmentManager, DIALOG_DATE);
}
});
mCheckBox = (CheckBox) view.findViewById(R.id.crime_solved);
mCheckBox.setChecked(mCrime.isSolved()); //Updating Crime fragment with crime
mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
mCrime.setSolved(isChecked);
}
});
if (mCrime.getSuspect() != null) {
mSuspectButton.setText(mCrime.getSuspect());
}
PackageManager packageManager = getActivity().getPackageManager();
if (packageManager.resolveActivity(pickContact, PackageManager.MATCH_DEFAULT_ONLY) == null) {
mSuspectButton.setEnabled(false);
}
mImageButton = (ImageButton) view.findViewById(R.id.crime_camera);
final Intent captureImage = new Intent(MediaStore.ACTION_IMAGE_CAPTURE) ;
boolean canTakePhoto = mFilePhoto != null &&
captureImage.resolveActivity(packageManager)!=null;
mImageButton.setEnabled(canTakePhoto);
if (canTakePhoto){
Uri uri = Uri.fromFile(mFilePhoto);
captureImage.putExtra(MediaStore.EXTRA_OUTPUT,uri);
}
mImageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivityForResult(captureImage,REQUEST_PHOTO);
}
});
mImageView = (ImageView) view.findViewById(R.id.crime_photo);
updatePhotoView();
return view;
}
public void returnResult() {
getActivity().setResult(Activity.RESULT_OK, null);
}
@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(mCrime.getDate().toString());
} else if (requestCode == REQUEST_CONTACT && data != null) {
Uri contactUri = data.getData();
String[] queryFields = new String[]{
ContactsContract.Contacts.DISPLAY_NAME
};
Cursor cursor = getActivity().getContentResolver().query(contactUri, queryFields, null, null, null);
try {
if (cursor.getCount() == 0) {
return;
}
cursor.moveToFirst();
String suspect = cursor.getString(0);
mCrime.setSuspect(suspect);
mSuspectButton.setText(suspect);
} finally {
cursor.close();
}
}else if (requestCode == REQUEST_PHOTO){
updatePhotoView();
}
}
private void updateDate(String text) {
mDateButton.setText(text);
}
private String getCrimeReport() {
String solvedString = null;
if (mCrime.isSolved()) {
solvedString = getString(R.string.crime_report_solved);
} else {
solvedString = getString(R.string.crime_report_unsolved);
}
String dateFormat = "EEE, MM dd";
String dateString = DateFormat.format(dateFormat, mCrime.getDate()).toString();
String suspect = mCrime.getSuspect();
if (suspect == null) {
suspect = getString(R.string.crime_report_no_suspect);
} else {
suspect = getString(R.string.crime_report_suspect, suspect);
}
String report = getString(R.string.crime_report, mCrime.getTitile(), dateString, solvedString, suspect);
return report;
}
@Override
public void onPause() {
super.onPause();
CrimeLab.get(getActivity()).updateCrime(mCrime);
}
private void updatePhotoView() {
if (mFilePhoto == null || !mFilePhoto.exists()) {
mImageView.setImageDrawable(null);
} else {
Bitmap bitmap = PictureUtils.getScaledBitmap(
mFilePhoto.getPath(), getActivity());
mImageView.setImageBitmap(bitmap);
}
}
}
