Kotlin 从 Google 表格中读取和显示数据

Question

有人可以帮我完成我想做的事情吗？我花了几个小时看视频和上网谷歌自己做。但是，我不能，因为我无法找到从 Google 表格中仅读取一个单元格值的帮助，而且我也找不到 Kotlin 的代码。

我想要的只是在 MainActivity 的文本视图中的 Google 表格中的单元格 B2 中显示值。

我是 Android 应用开发新手。

提前致谢。

Answer 1

我建议制作 google sheet public，然后您可以以 csv 或其他格式访问它，但 csv 是最简单的。您可以根据工作表 id 构造 url：

val url = "https://docs.google.com/spreadsheets/d/e/${id}/pub?output=csv"

例如，您可以使用ktor 获取内容：

suspend fun getUrlAsString(url: String): String {
    val client = HttpClient(Android) {
    }
    return client.get<String>(url)
}

如何解析 csv 的示例，但您可以使用一些库或自己解析文本，这很简单：

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

}

Answer 2

我有代码可以从谷歌表格中获取价值，让我分享给你。

首先，您需要创建一个电子表格，并且您需要创建 api 密钥才能访问电子表格 api。

我的电子表格数据

--> 当您在文件选项中创建电子表格时-> 发布到网络。它会生成一个链接。 -> 从该链接获取工作表 ID。它会像

https://docs.google.com/spreadsheets/d/your-id-//edit#gid=0

--> 在给定的 url 上，您必须输入您的工作表 ID 工作表名称和您从 google console 生成的 api 密钥

您可以从生成的 url 获取数据的 json 格式到电子表格中。 您的网址将如下所示。

https://sheets.googleapis.com/v4/spreadsheets/YOUR_SHEET_ID/values/YOUR_SHEET_NAME?alt=json&key=YOUR_API_KEY

在浏览器中打开这个 url 并从电子表格中获取数据的 json 格式。

获取数据后

这是从电子表格中检索数据的代码。

首先你需要一个模型类来从 json 中获取数据。

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);
        }
    }

您可以使用此代码从整个 google 电子表格中获取数据。