連絡先選択ツール: プライバシー重視の連絡先の共有

// State to hold the list of selected contacts
var contacts by remember { mutableStateOf<List>(emptyList()) }
// Launcher for the Contact Picker intent
val pickContact = rememberLauncherForActivityResult(StartActivityForResult()) {
if (it.resultCode == Activity.RESULT_OK) {
val resultUri = it.data?.data ?: return@rememberLauncherForActivityResult
    // Process the result URI in a background thread
    coroutine.launch {
        contacts = processContactPickerResultUri(resultUri, context)
    }
}
}
// Define the specific contact data fields you need
val requestedFields = arrayListOf(
Email.CONTENT_ITEM_TYPE,
Phone.CONTENT_ITEM_TYPE,
)
// Set up the intent for the Contact Picker
val pickContactIntent = Intent(ACTION_PICK_CONTACTS).apply {
putExtra(EXTRA_PICK_CONTACTS_SELECTION_LIMIT, 5)
putStringArrayListExtra(
EXTRA_PICK_CONTACTS_REQUESTED_DATA_FIELDS,
requestedFields
)
putExtra(EXTRA_PICK_CONTACTS_MATCH_ALL_DATA_FIELDS, false)
}
// Launch the picker
pickContact.launch(pickContactIntent)

// Data class representing a parsed Contact with selected details
data class Contact(val id: String, val name: String, val email: String?, val phone: String?)

// Helper function to query the content resolver with the URI returned by the Contact Picker.
// Parses the cursor to extract contact details such as name, email, and phone number
private suspend fun processContactPickerResultUri(
    sessionUri: Uri,
    context: Context
): List<Contact> = withContext(Dispatchers.IO) {
    // Define the columns we want to retrieve from the ContactPicker ContentProvider
    val projection = arrayOf(
        ContactsContract.Contacts._ID,
        ContactsContract.Contacts.DISPLAY_NAME_PRIMARY,
        ContactsContract.Data.MIMETYPE, // Type of data (e.g., email or phone)
        ContactsContract.Data.DATA1, // The actual data (Phone number / Email string)
    )

    val results = mutableListOf<Contact>()

    // Note: The Contact Picker Session Uri doesn't support custom selection & selectionArgs.
    context.contentResolver.query(sessionUri, projection, null, null, null)?.use { cursor ->
        // Get the column indices for our requested projection
        val contactIdIdx = cursor.getColumnIndex(ContactsContract.Contacts._ID)
        val mimeTypeIdx = cursor.getColumnIndex(ContactsContract.Data.MIMETYPE)
        val nameIdx = cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME_PRIMARY)
        val data1Idx = cursor.getColumnIndex(ContactsContract.Data.DATA1)

        while (cursor.moveToNext()) {
            val contactId = cursor.getString(contactIdIdx)
            val mimeType = cursor.getString(mimeTypeIdx)
            val name = cursor.getString(nameIdx) ?: ""
            val data1 = cursor.getString(data1Idx) ?: ""

            // Determine if the current row represents an email or a phone number
            val email = if (mimeType == Email.CONTENT_ITEM_TYPE) data1 else null
            val phone = if (mimeType == Phone.CONTENT_ITEM_TYPE) data1 else null

            // Add the parsed contact to our results list
            results.add(Contact(contactId, name, email, phone))
        }
    }

    return@withContext results
}