BMI App

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="10dp"
        android:text="Body Mass Index Calculator"
        android:textSize="25sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/address"
        android:layout_margin="30dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="10dp"
        android:text="Address "
        android:textSize="20sp"
        android:textStyle="bold" />


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="50dp"
        android:text="Weight(in Kg)"
        android:textSize="20dp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.292" />

    <EditText
        android:id="@+id/etWeight"
        android:layout_width="150dp"
        android:layout_height="50dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="20dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="50dp"
        android:text="Height (in cm)"
        android:textSize="20dp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.292" />

    <EditText
        android:id="@+id/etHeight"
        android:layout_width="150dp"
        android:layout_height="50dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="20dp"
        android:textSize="20dp" />

    <Button
        android:id="@+id/calculate_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="40dp"
        android:backgroundTint="#2CD3BE"
        android:text="Calculate" />

    <TextView
        android:id="@+id/bmi_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="20dp"
        android:text="The BMI is "
        android:textSize="20dp"
        android:visibility="gone" />

    <TextView
        android:id="@+id/bmi"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="20dp"
        android:text="BMI"
        android:textSize="20dp"
        android:visibility="gone" />

    <TextView
        android:id="@+id/status"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="20dp"
        android:text="Status"
        android:textSize="20dp"
        android:textStyle="bold"
        android:visibility="gone" />

    <Button
        android:id="@+id/ReCalculate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="20dp"
        android:backgroundTint="#EAA268"
        android:text="Recalculate"
        android:visibility="gone" />

</androidx.appcompat.widget.LinearLayoutCompat>

BMIcalculator.kt

package com.example.bmiapp

class BMIcalculator {

    fun calculateBMI(heightCMS: Float, weightKGS: Float ): String {

        val heightMtr = heightCMS / 100.0
        val bmiScore = weightKGS / (heightMtr * heightMtr)

        return getBMIStatus(bmiScore)
    }

    fun getBMIStatus ( bmiScore : Double) : String {
        return when(bmiScore) {
            in 0.0..16.0 -> "Very Thin"
            in 16.0..17.0 -> "Thin"
            in 17.0..18.5 -> "Under Weight"
            in 18.5..24.9 -> "Healthy"
            in 24.9..30.0 -> "Overweight"
            in 30.0..100.0 -> "Obesity"
            else -> "Wrong value"
        }
    }

}

ContentView.swift

import SwiftUI
import shared

@available(iOS 15.0, *)
struct ContentView: View {
	let greet = Greeting().greeting()
    @State private var weightKgs: String = ""
    @State private var heightCMs: String = ""
    @State private var bmiShow : Bool = false
    @State private var bmiStatus : String = ""
    @available(iOS 15.0, *)
    var body: some View {
        if #available(iOS 15.0, *) {
            VStack (spacing: 30) {
                Text("Body Mass index calculotor")
                Text("Weight (KGs)")
                TextField("Weight", text: $weightKgs)
                    .textFieldStyle(.roundedBorder)
                Text("Height (CMs)")
                TextField("Height", text: $heightCMs)
                    .textFieldStyle(.roundedBorder)
                
                Button(
                    "Calculate",
                    action: {
                        //some code
                        bmiShow = true
                        
                        bmiStatus = BMIcalculator().calculateBMI(heightCMS: Float(heightCMs)!, weightKGS: Float(weightKgs)!)
                    }
                )
            }.padding(30)
                .alert(
                    "BMI Result is \(bmiStatus)",
                    isPresented: $bmiShow
                ) {
                    Button("Close", action: { bmiShow = false })
                }
        } else {
            // Fallback on earlier versions
        }
	}
}

struct ContentView_Previews: PreviewProvider {
	static var previews: some View {
        if #available(iOS 15.0, *) {
            ContentView()
        } else {}
	}
}

LocationDetails .kt

package com.example.bmiapp

 expect class LocationDetails {
     fun getLocationAddress (locationAddress: LocationAddress)
}

 interface LocationAddress { // just to get async data
     fun onReceiveLocationAddress(address: String) : String
}

LocationDetails.kt

package com.example.bmiapp
import android.annotation.SuppressLint
import android.app.Activity
import android.location.Address
import android.location.Geocoder
import android.location.Location
import android.os.Looper
import com.google.android.gms.location.*
import java.util.*
import java.util.concurrent.TimeUnit
actual class LocationDetails {
    lateinit var activity: Activity
    @SuppressLint("MissingPermission")
    actual fun getLocationAddress(locationAddress: LocationAddress) {

        val fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(activity)
        lateinit var locationCallback: LocationCallback

        val locationRequest: LocationRequest = LocationRequest.Builder(Priority.PRIORITY_HIGH_ACCURACY, 1500)
            .setWaitForAccurateLocation(false)
            .setMinUpdateIntervalMillis(1000)
            .setMaxUpdateDelayMillis(2000)
            .build()

        locationCallback = object : LocationCallback() {
            override fun onLocationResult(locationResult: LocationResult) {
                locationAddress.onReceiveLocationAddress(
                    locationResult.lastLocation?.let {
                        getAddress(it)
                    } ?: "Location error"
                ) } }

        fusedLocationProviderClient.requestLocationUpdates(
            locationRequest,
            locationCallback,
            Looper.myLooper()!!
        ) }
    fun getAddress(latLng: Location): String? {
        val geocoder = Geocoder(activity, Locale.getDefault())
        val addresses: List<Address>? =
            geocoder.getFromLocation(latLng.latitude, latLng.longitude, 1)
        return if (addresses?.isNotEmpty() == true) {
            val address = addresses[0]
            address.getAddressLine(0)
        } else {
            "Location not found"
        }
    }
}

MainActivity.kt

package com.example.bmiapp.android

import android.content.pm.PackageManager
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.os.Message
import com.example.bmiapp.Greeting
import android.widget.TextView
import androidx.appcompat.app.AlertDialog
import androidx.core.app.ActivityCompat
import com.example.bmiapp.BMIcalculator
import com.example.bmiapp.LocationDetails
import com.example.bmiapp.android.databinding.ActivityMainBinding
import com.example.bmiapp.LocationAddress as LocationAddress

fun greet(): String {
    return Greeting().greeting()
}

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding
    val requestcode = 123
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)


        binding.calculateBtn.setOnClickListener {
            val weightKG = binding.etWeight.text.toString().toFloat()
            val heightCMS = binding.etHeight.text.toString().toFloat()

            // Call commonMain Class and display in alert
            val bmiCalculator = BMIcalculator()
            val bmiResult = bmiCalculator.calculateBMI(heightCMS,weightKG)
            showAlert(bmiResult)

            if (isLocationPermissionGranted())
            LocationDetails().apply {
                activity = this@MainActivity
                getLocationAddress(object : LocationAddress {
                    override fun onReceiveLocationAddress(address: String): String {
                        runOnUiThread {
                            binding.address.text = address
                        }
                        return address
                    }
                })
            }
        }
    }

    fun showAlert(message: String) {
        AlertDialog.Builder(this)
            .setTitle("BMI STATUS")
            .setMessage("You are $message")
            .show()

    }

    private fun isLocationPermissionGranted(): Boolean {
        return if (ActivityCompat.checkSelfPermission(
                this,
                android.Manifest.permission.ACCESS_COARSE_LOCATION
            ) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(
                this,
                android.Manifest.permission.ACCESS_FINE_LOCATION
            ) != PackageManager.PERMISSION_GRANTED
        ) {
            ActivityCompat.requestPermissions(
                this,
                arrayOf(
                    android.Manifest.permission.ACCESS_FINE_LOCATION,
                    android.Manifest.permission.ACCESS_COARSE_LOCATION
                ),
                requestcode
            )
            false
        } else {
            true
        }
    }
}