Get Data from firestore in Android Studio with Kotlin.

• We have use a one data model, Activity and one xml file.
• will add a dependency for .

Hi everyone:

ActivityMain.kt:

class AppointmentCompleteActivity : AppCompatActivity() {

    private var db = FirebaseFirestore.getInstance()
    lateinit var appointmentCompleteDoctorImage: CircleImageView
    lateinit var appointmentCompleteDoctorName: TextView
    lateinit var appointmentCompleteDoctorSpecialistName: TextView
    lateinit var appointmentCompleteHospitalName: TextView

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_apponitment_complete)

        appointmentCompleteDoctorImage = findViewById(R.id.appointmentComplete_doctorImage)
        appointmentCompleteDoctorName = findViewById(R.id.appointmentCompleteDoctorName)
        appointmentCompleteDoctorSpecialistName = findViewById(R.id.appointmentCompleteSpecialistName)
        appointmentCompleteHospitalName = findViewById(R.id.appointmentComplateHospitalName)

        doctorRetrieveData()     

}

    private fun doctorRetrieveData() {
        db.collection("booking")..document("your document")
            .get()
            .addOnSuccessListener {
                val data = it.toObjects(DoctorSlotsModel::class.java)
                val items = data.size
                if (items > 0){
                   for (item in data){
//                       val doctorCompleteImage = item.profileImage
                       val doctorCompleteName = item.doctor?.firstName+ " "+ item.doctor?.lastName
                       val doctorComplete = item.doctor?.speciality
                       val doctorCompleteHospitalName = "AIIMS PATNA"

                       appointmentCompleteDoctorName.text = doctorCompleteName
                       appointmentCompleteDoctorSpecialistName.text = doctorComplete
                       appointmentCompleteHospitalName.text = doctorCompleteHospitalName
                   }
                }
            }
    }

I have create a collection (booking), it has create different sub-collection and different type of field. I have select a three fields. it is receive data in android Studio from data class models. it is create a private function and one create private a variable.

thanks for reading…