Kotlin read and display data from Google Sheets - kotlin

Question

Can somebody help me accomplish what I am trying to. I have spent hours watching videos and surfing Google to do it myself. But, I couldn't as there's no help I could find to read just one cell value from Google Sheets and I couldn't also find code for Kotlin.
All what I want is to display the value in cell B2 in my Google sheets in a textview on MainActivity.
I am new to Android app development.
Thanks in advance.

Answer 1

i have code for to get the value from google sheets let me share it to you.
First of all you need to create one spreadsheet and you need to create your api key to get access to spreadsheet api.
MY SpreadSheet data
--> When you create spread sheet in file options -> publish to web. and it will generate a link.
-> get the sheets id from that link. it will be like
https://docs.google.com/spreadsheets/d/your-id-//edit#gid=0
--> On given url you have to put your sheets id sheet name and the api key that you have generated from google console
From generated url you can get the json format of your data into spreadsheet.
Your url will look like this.
https://sheets.googleapis.com/v4/spreadsheets/YOUR_SHEET_ID/values/YOUR_SHEET_NAME?alt=json&key=YOUR_API_KEY
Open this url into browser and get the json format of your data from spreadsheet.
After getting the data
Here is the code to retrive the data from spreadsheet.
first you need a model class to get the data from json.
class model {
// variables for our first name,
// last name, email and avatar
private var first_name: String? = null
private var last_name: String? = null
private var email: String? = null
constructor(first_name: String, last_name: String, email: String){
this.first_name = first_name;
this.last_name = last_name;
this.email = email;
}
fun getFirst_name(): String? {
return first_name
}
fun setFirst_name(first_name: String?) {
this.first_name = first_name
}
fun getLast_name(): String? {
return last_name
}
fun setLast_name(last_name: String?) {
this.last_name = last_name
}
fun getEmail(): String? {
return email
}
fun setEmail(email: String?) {
this.email = email
}
}
BaseModel.kt
class BaseModel {
#SerializedName("range")
#Expose
private var range: String? = null
#SerializedName("majorDimension")
#Expose
private var majorDimension: String? = null
#SerializedName("values")
#Expose
private var values: List<List<model?>?>? = null
fun getRange(): String? {
return range
}
fun setRange(range: String?) {
this.range = range
}
fun getMajorDimension(): String? {
return majorDimension
}
fun setMajorDimension(majorDimension: String?) {
this.majorDimension = majorDimension
}
fun getValues(): List<List<model?>?>? {
return values
}
fun setValues(values: List<List<model?>?>?) {
this.values = values
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/idRVUsers"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:listitem="#layout/user_rv_item" />
<!--we are adding progress bar for thepurpose of loading-->
<ProgressBar
android:id="#+id/idPBLoading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
user_rv_item.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="8dp"
app:cardCornerRadius="8dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="2dp">
<!--image view for displaying user image-->
<ImageView
android:id="#+id/idIVUser"
android:layout_width="100dp"
android:src="#drawable/ic_launcher_foreground"
android:layout_height="100dp"
android:layout_margin="10dp" />
<!--text view for displaying first name-->
<TextView
android:id="#+id/idTVFirstName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_toEndOf="#id/idIVUser"
android:layout_toRightOf="#id/idIVUser"
android:text="First Name"
android:textColor="#color/black"
android:textSize="15sp" />
<!--text view for displaying last name-->
<TextView
android:id="#+id/idTVLastName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/idTVFirstName"
android:layout_marginTop="10dp"
android:layout_toEndOf="#id/idIVUser"
android:layout_toRightOf="#id/idIVUser"
android:text="Last Name"
android:textColor="#color/black"
android:textSize="15sp" />
<!--text view for displaying user email-->
<TextView
android:id="#+id/idTVEmail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/idTVLastName"
android:layout_marginTop="10dp"
android:layout_toEndOf="#id/idIVUser"
android:layout_toRightOf="#id/idIVUser"
android:text="Email"
android:textColor="#color/black"
android:textSize="15sp" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
rv_adapter.kt
import android.content.Context
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
class UserRVAdapter(modelArraylist: ArrayList<model>) :
RecyclerView.Adapter<UserRVAdapter.ViewHolder>() {
// variable for our array list and context.
private val userModalArrayList: ArrayList<model> = modelArraylist
private val context: Context? = null
class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
val firstNameTV: TextView? = itemView.findViewById(R.id.idTVFirstName)
var lastNameTV: TextView? = itemView.findViewById(R.id.idTVLastName)
var emailTV: TextView? = itemView.findViewById(R.id.idTVEmail)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view: View =
LayoutInflater.from(parent.context).inflate(R.layout.user_rv_item, parent, false)
return ViewHolder(view)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
// getting data from our array list in our modal class.
// getting data from our array list in our modal class.
val userModal: model = userModalArrayList[position]
// on the below line we are setting data to our text view.
// on the below line we are setting data to our text view.
holder.firstNameTV?.setText(userModal.getFirst_name())
holder.lastNameTV?.setText(userModal.getLast_name())
holder.emailTV?.setText(userModal.getEmail())
}
override fun getItemCount(): Int {
return userModalArrayList.size
}
}
MainActivity.kt
import android.os.Bundle
import android.view.View
import android.widget.ProgressBar
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.android.volley.Request
import com.android.volley.Response
import com.android.volley.VolleyError
import com.android.volley.toolbox.JsonObjectRequest
import com.android.volley.toolbox.Volley
import org.json.JSONException
import org.json.JSONObject
class MainActivity : AppCompatActivity() {
private var userModalArrayList: ArrayList<model>? = null
private var userRVAdapter: UserRVAdapter? = null
private var userRV: RecyclerView? = null
private var loadingPB: ProgressBar? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
userModalArrayList = ArrayList()
userRV = findViewById(R.id.idRVUsers)
loadingPB = findViewById(R.id.idPBLoading)
getDataFromAPI()
}
private fun getDataFromAPI() {
val url=
"https://sheets.googleapis.com/v4/spreadsheets/YOUR_SHEET_ID/values/YOUR_SHEET_NAME?alt=json&key=YOUR_API_KEY"
val queue = Volley.newRequestQueue(this#MainActivity)
val jsonObjectRequest =
JsonObjectRequest(
Request.Method.GET,
url,
null,
object : Response.Listener<JSONObject> {
override fun onResponse(response: JSONObject) {
loadingPB!!.visibility = View.GONE
try {
// val feedObj = response.getJSONObject("")
val entryArray = response.getJSONArray("values")
for (i in 1 until entryArray.length()) {
val entryObj = entryArray.getJSONArray(i)
val firstName =
entryObj[2].toString()
val lastName = entryObj[3].toString()
// entryObj.getJSONObject("gsx\$lastname").getString("\$t")
val email = entryObj[1].toString()
userModalArrayList!!.add(model(firstName, lastName, email))
// passing array list to our adapter class.
userRVAdapter = UserRVAdapter(userModalArrayList!!)
// setting layout manager to our recycler view.
userRV!!.layoutManager = LinearLayoutManager(this#MainActivity)
// setting adapter to our recycler view.
userRV!!.adapter = userRVAdapter
}
} catch (e: JSONException) {
e.printStackTrace()
}
}
},
object : Response.ErrorListener {
override fun onErrorResponse(error: VolleyError?) {
// handline on error listener method.
Toast.makeText(this#MainActivity, "Fail to get data..", Toast.LENGTH_SHORT)
.show()
}
})
queue.add(jsonObjectRequest);
}
}
You can use this code to get data from your whole google spread sheet.

Answer 2

I suggest making google sheet public, then you can access it for example as csv or in other formats, but csv is simplest. You can construct url based on sheet id:
val url = "https://docs.google.com/spreadsheets/d/e/${id}/pub?output=csv"
You can get contents for example using ktor:
suspend fun getUrlAsString(url: String): String {
val client = HttpClient(Android) {
}
return client.get<String>(url)
}
Example on how to parse csv, but you can use some library or parse text yourself, it's pretty simple:
fun parseCsv(text: String): List<Map<String, String>> {
val reader = CSVReaderBuilder(StringReader(text))
.build()
val lines = reader.readAll()
val firstLine = lines.removeAt(0)
val result = lines.map { line ->
firstLine.mapIndexed { index, label ->
label to line[index]
}.toMap()
}
if (result.size > 4)
println(result[4])
return result
}