Good morning Ladies and Gentlemen,
I have a really big problem and can't go on. I don't know how I can use a interface in android as an event listener. I defined an interface ProfilePictureTakenEvent with the method onProfilePictureTaken. In an dialog, which is opened by a button click on a fragment, the user can take an Image with the camera. I used the method startActivityForResult for it. The result (the image) of this action I get in the fragment (the overriden method onActivityResult). Now my question: How can I show this picture in my dialog when I get the result in my fragment? I thought that I can use an event listener, but I don't know how and didn't find any Explanation.
Here my code:
UserFragment.tk
class UserFragment() : Fragment() {
private var userFragment: UserFragment? = null
private var profilePictureTakenEvent: ProfilePictureTakenEvent? = null
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
return inflater.inflate(R.layout.fragment_user, container, false)
}
override fun onViewCreated(
view: View,
savedInstanceState: Bundle?
) {
super.onViewCreated(view, savedInstanceState)
this.userFragment = this
val database = UserManagerDatabase(view.context)
val repository = UserRepository(database)
val factory = UserViewModelFactory(repository)
val viewModel = ViewModelProviders.of(this, factory).get(UserViewModel::class.java)
val adapter = UserAdapter(listOf(), viewModel)
rvUsers.layoutManager = LinearLayoutManager(view.context)
rvUsers.adapter = adapter
var emailAddresses: List<String> = emptyList()
viewModel.getAll().observe(viewLifecycleOwner, { userList ->
adapter.users = userList
emailAddresses = userList.map { user -> user.email }
adapter.notifyDataSetChanged()
})
viewModel.getEmailAddresses().observe(viewLifecycleOwner, {emailAddresses = it })
fBtnAddUser.setOnClickListener {
AddUserDialog(view.context,
object: UserCreateEvent {
override fun onAddButtonClicked(user: User) {
viewModel.insert(user)
}
}, emailAddresses, userFragment).show()
}
}
fun setProfilePictureTakenEvent(profilePictureTakenEvent: ProfilePictureTakenEvent) {
this.profilePictureTakenEvent = profilePictureTakenEvent
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if (requestCode == AddUserDialog.REQUEST_IMAGE_CAPTURE) {
this.profilePictureTakenEvent?.onProfilePictureTaken(data)
}
}
}
AddUserDialog.kt:
class AddUserDialog(
context: Context,
private var userCreateEvents: UserCreateEvent,
private var emails: List<String>,
private var parentFragment: UserFragment?
) : AppCompatDialog(context), ProfilePictureTakenEvent {
companion object {
const val REQUEST_IMAGE_CAPTURE = 1
}
private var imageData: Bitmap? = null
override fun onProfilePictureTaken(data: Intent?) {
this.ivProfilePicture.setImageBitmap(data?.extras?.get("data") as Bitmap)
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.dialog_add_user)
setTitle(context.getString(R.string.title_add_user))
val editTextViews: Map<String, EditText> = mapOf(
"first_name" to dAddUserEdFirstName,
"last_name" to dAddUserEdLastName,
"email" to dAddUserEdEmail,
"password" to dAddUserEdPassword,
"password_confirmation" to dAddUserEdPasswordConfirmation
)
dAddUserBtnSave.setOnClickListener {
val firstName = dAddUserEdFirstName.text.toString()
val lastName = dAddUserEdLastName.text.toString()
val username = "${firstName.toLowerCase(Locale.GERMAN)}-${lastName.toLowerCase(Locale.GERMAN)}"
val email = dAddUserEdEmail.text.toString()
val password = dAddUserEdPassword.text.toString()
val passwordConfirmation = dAddUserEdPasswordConfirmation.text.toString()
var error = false
val emptyFields: StringBuilder = StringBuilder()
// Check if any EditText is empty
editTextViews.forEach {(key, editTextView) ->
val textEmpty: Boolean = editTextView.text.toString().isEmpty()
if (textEmpty) {
error = true
emptyFields.append("${context.getString(AppHelper.stringTranslation(key))}, ")
}
AppHelper.updateBackground(context, editTextView, if (textEmpty) R.drawable.input_field_error else R.drawable.input_field)
}
if (error) {
//AppHelper.showToastLong(context, context.getString(R.string.error_field_not_filled, AppHelper.commaStringToCorrectGrammatical(context, emptyFields.toString())))
return@setOnClickListener
}
// Check if E-Mail address is valid
if (AppHelper.invalidEmail(email)) {
AppHelper.showToastShort(context, R.string.error_invalid_email)
return@setOnClickListener
}
// Check if supplied E-Mail address is unique
if (emails.contains(email)) {
AppHelper.showToastShort(context, R.string.error_email_already_taken)
return@setOnClickListener
}
// Check if password and password confirmation match
if (password != passwordConfirmation) {
AppHelper.showToastShort(context, R.string.error_password_confirmation_not_matching)
return@setOnClickListener
}
//TODO: Password hashing
// Creating the User
val user = User(firstName, lastName, username, email, password)
userCreateEvents.onAddButtonClicked(user)
// Closing the dialog after calling the onClickEvent and data is valid
dismiss()
}
btnTakeProfilePicture.setOnClickListener {
val takePictureIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
try {
parentFragment?.startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE)
} catch (e: ActivityNotFoundException) {
AppHelper.showToastLong(context, "Fehler")
}
}
// Close dialog when cancel Button is clicked
dAddUserBtnCancel.setOnClickListener { cancel() }
}
}
ProfilePictureTakenEvent.kt:
interface ProfilePictureTakenEvent {
fun onProfilePictureTaken(data: Intent?)
}
Thanks for your Help. Best regards,
Daniel
