Sqlite Example with Kotlin

January 2, 2020 androindian

1146 views.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout
    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"
    tools:context=".MainActivity"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    android:orientation="vertical">
    <EditText
        android:id="@+id/id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="number"
        android:hint="id" />

    <EditText
        android:id="@+id/name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPersonName"
        android:hint="Name" />

    <EditText
        android:id="@+id/mobile"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="phone"
        android:hint="Mobile"/>

    <EditText
        android:id="@+id/email"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textEmailAddress"
        android:hint="Email"/>

    <EditText
        android:id="@+id/password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPassword"
        android:hint="Password"/>

    <Button
        android:id="@+id/save"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Save" />
    <Button
        android:id="@+id/getall"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="getall" />
    <Button
        android:id="@+id/update"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Update" />
    <Button
        android:id="@+id/delete"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Delete" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

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"

tools:context=".MainActivity"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

<EditText

android:id="@+id/id"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:ems="10"

android:inputType="number"

android:hint="id" />

<EditText

android:id="@+id/name"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:ems="10"

android:inputType="textPersonName"

android:hint="Name" />

<EditText

android:id="@+id/mobile"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:ems="10"

android:inputType="phone"

android:hint="Mobile"/>

<EditText

android:id="@+id/email"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:ems="10"

android:inputType="textEmailAddress"

android:hint="Email"/>

<EditText

android:id="@+id/password"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:ems="10"

android:inputType="textPassword"

android:hint="Password"/>

<Button

android:id="@+id/save"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Save" />

<Button

android:id="@+id/getall"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="getall" />

<Button

android:id="@+id/update"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Update" />

<Button

android:id="@+id/delete"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Delete" />

</LinearLayout>

MainActivity.kt

package com.androindian.sqlite

import android.os.Bundle
import android.view.View
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity

import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    var dataBaseHelper: DataBaseHelper? = null
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView( R.layout.activity_main)
        dataBaseHelper = DataBaseHelper(this@MainActivity)
        //save
        save.setOnClickListener {
            val insert = dataBaseHelper!!.insertdData(
                  name.text.toString().trim { it <= ' ' },
                  email.text.toString().trim { it <= ' ' },
                    mobile.text.toString().trim { it <= ' ' },
                    password.text.toString().trim { it <= ' ' })
            if (insert == true) {
                Toast.makeText(this@MainActivity, "Sucess", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this@MainActivity, "Failed", Toast.LENGTH_SHORT).show()
            }
        }
        //get
        getall.setOnClickListener(View.OnClickListener {
            val res = dataBaseHelper!!.alldata
            if (res.count == 0) {
                Toast.makeText(this@MainActivity, "Nodata", Toast.LENGTH_SHORT).show()
                return@OnClickListener
            }
            val buffer = StringBuffer()
            while (res.moveToNext()) {
                buffer.append("Id " + res.getString(0) + "\n")
                buffer.append("name " + res.getString(1) + "\n")
                buffer.append("email " + res.getString(2) + "\n")
                buffer.append("mobile " + res.getString(3) + "\n")
                buffer.append("pass " + res.getString(4) + "\n")
            }
            ShowMessage("Data", buffer.toString())
        })
        //update
      update.setOnClickListener {
            val update = dataBaseHelper!!.updateData(
                    id.text.toString().trim { it <= ' ' },
                    name.text.toString().trim { it <= ' ' },
                    email.text.toString().trim { it <= ' ' },
                    mobile.text.toString().trim { it <= ' ' },
                    password.text.toString().trim { it <= ' ' })
            if (update == true) {
                Toast.makeText(this@MainActivity, "Sucess", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this@MainActivity, "Failed", Toast.LENGTH_SHORT).show()
            }
        }
        //delete
        delete.setOnClickListener {
            val delete = dataBaseHelper!!.deleteData(id.text.toString())
            if (delete > 0) {
                Toast.makeText(this@MainActivity, "Sucess", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this@MainActivity, "Failed", Toast.LENGTH_SHORT).show()
            }
        }
    }

    private fun ShowMessage(data: String, toString: String) {
        val alert = AlertDialog.Builder(this@MainActivity)
        alert.setTitle(data)
        alert.setMessage(toString)
        alert.show()
    }
}

package com.androindian.sqlite

import android.os.Bundle

import android.view.View

import android.widget.Toast

import androidx.appcompat.app.AlertDialog

import androidx.appcompat.app.AppCompatActivity

import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

var dataBaseHelper: DataBaseHelper? = null

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView( R.layout.activity_main)

dataBaseHelper = DataBaseHelper(this@MainActivity)

//save

save.setOnClickListener {

val insert = dataBaseHelper!!.insertdData(

name.text.toString().trim { it <= ' ' },

email.text.toString().trim { it <= ' ' },

mobile.text.toString().trim { it <= ' ' },

password.text.toString().trim { it <= ' ' })

if (insert == true) {

Toast.makeText(this@MainActivity, "Sucess", Toast.LENGTH_SHORT).show()

} else {

Toast.makeText(this@MainActivity, "Failed", Toast.LENGTH_SHORT).show()

}

//get

getall.setOnClickListener(View.OnClickListener {

val res = dataBaseHelper!!.alldata

if (res.count == 0) {

Toast.makeText(this@MainActivity, "Nodata", Toast.LENGTH_SHORT).show()

return@OnClickListener

}

val buffer = StringBuffer()

while (res.moveToNext()) {

buffer.append("Id " + res.getString(0) + "\n")

buffer.append("name " + res.getString(1) + "\n")

buffer.append("email " + res.getString(2) + "\n")

buffer.append("mobile " + res.getString(3) + "\n")

buffer.append("pass " + res.getString(4) + "\n")

}

ShowMessage("Data", buffer.toString())

})

//update

update.setOnClickListener {

val update = dataBaseHelper!!.updateData(

id.text.toString().trim { it <= ' ' },

name.text.toString().trim { it <= ' ' },

email.text.toString().trim { it <= ' ' },

mobile.text.toString().trim { it <= ' ' },

password.text.toString().trim { it <= ' ' })

if (update == true) {

Toast.makeText(this@MainActivity, "Sucess", Toast.LENGTH_SHORT).show()

} else {

Toast.makeText(this@MainActivity, "Failed", Toast.LENGTH_SHORT).show()

}

//delete

delete.setOnClickListener {

val delete = dataBaseHelper!!.deleteData(id.text.toString())

if (delete > 0) {

Toast.makeText(this@MainActivity, "Sucess", Toast.LENGTH_SHORT).show()

} else {

Toast.makeText(this@MainActivity, "Failed", Toast.LENGTH_SHORT).show()

}

private fun ShowMessage(data: String, toString: String) {

val alert = AlertDialog.Builder(this@MainActivity)

alert.setTitle(data)

alert.setMessage(toString)

alert.show()

}

DataBaseHelper.kt

package com.androindian.sqlite

import android.content.ContentValues
import android.content.Context
import android.database.Cursor
import android.database.sqlite.SQLiteDatabase
import android.database.sqlite.SQLiteOpenHelper

class DataBaseHelper(context: Context?) : SQLiteOpenHelper(context, Databasename, null, 1) {
    override fun onCreate(db: SQLiteDatabase) { /*db.execSQL("create table "+ Tablename+ " "+
                "(ID INTERGER PRIMARY KEY AUTOINCREMENT," +
                "NAME TEXT,EMAIL TEXT ,MOBILE TEXT,PASSWORD TEXT)");*/
        db.execSQL("create table " + Tablename + " " +
                "(ID INTEGER PRIMARY KEY AUTOINCREMENT," +
                "NAME TEXT,EMAIL TEXT ,MOBILE TEXT,PASSWORD TEXT)")
    }

    override fun onUpgrade(db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {
        db.execSQL("DROP TABLE IF EXISTS $Tablename")
        onCreate(db)
    }

    fun insertdData(name: String?, email: String?, mobile: String?, password: String?): Boolean {
        val sqLiteDatabase = this.writableDatabase
        val contentValues = ContentValues()
        contentValues.put(Col2, name)
        contentValues.put(Col3, email)
        contentValues.put(Col4, mobile)
        contentValues.put(Col5, password)
        val res = sqLiteDatabase.insert(Tablename, null, contentValues)
        return if (res == -1L) {
            false
        } else {
            true
        }
    }

    val alldata: Cursor
        get() {
            val sqLiteDatabase = this.readableDatabase
            return sqLiteDatabase.rawQuery("select * from $Tablename", null)
        }

    fun updateData(id: String, name: String?, email: String?, mobile: String?, password: String?): Boolean {
        val sqLiteDatabase = this.writableDatabase
        val contentValues = ContentValues()
        contentValues.put(Col1, id)
        contentValues.put(Col2, name)
        contentValues.put(Col3, email)
        contentValues.put(Col4, mobile)
        contentValues.put(Col5, password)
        sqLiteDatabase.update(Tablename, contentValues, "ID= ?", arrayOf(id))
        return true
    }

    fun deleteData(id: String): Int {
        val sqLiteDatabase = this.writableDatabase
        return sqLiteDatabase.delete(Tablename, "ID =?", arrayOf(id))
    }

    companion object {
        const val Databasename = "Student.db"
        const val Tablename = "educations"
        const val Col1 = "ID"
        const val Col2 = "NAME"
        const val Col3 = "EMAIL"
        const val Col4 = "MOBILE"
        const val Col5 = "PASSWORD"
    }
}

package com.androindian.sqlite

import android.content.ContentValues

import android.content.Context

import android.database.Cursor

import android.database.sqlite.SQLiteDatabase

import android.database.sqlite.SQLiteOpenHelper

class DataBaseHelper(context: Context?) : SQLiteOpenHelper(context, Databasename, null, 1) {

override fun onCreate(db: SQLiteDatabase) { /*db.execSQL("create table "+ Tablename+ " "+

"(ID INTERGER PRIMARY KEY AUTOINCREMENT," +

"NAME TEXT,EMAIL TEXT ,MOBILE TEXT,PASSWORD TEXT)");*/

db.execSQL("create table " + Tablename + " " +

"(ID INTEGER PRIMARY KEY AUTOINCREMENT," +

"NAME TEXT,EMAIL TEXT ,MOBILE TEXT,PASSWORD TEXT)")

}

override fun onUpgrade(db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {

db.execSQL("DROP TABLE IF EXISTS $Tablename")

onCreate(db)

}

fun insertdData(name: String?, email: String?, mobile: String?, password: String?): Boolean {

val sqLiteDatabase = this.writableDatabase

val contentValues = ContentValues()

contentValues.put(Col2, name)

contentValues.put(Col3, email)

contentValues.put(Col4, mobile)

contentValues.put(Col5, password)

val res = sqLiteDatabase.insert(Tablename, null, contentValues)

return if (res == -1L) {

false

} else {

true

}

val alldata: Cursor

get() {

val sqLiteDatabase = this.readableDatabase

return sqLiteDatabase.rawQuery("select * from $Tablename", null)

}

fun updateData(id: String, name: String?, email: String?, mobile: String?, password: String?): Boolean {

val sqLiteDatabase = this.writableDatabase

val contentValues = ContentValues()

contentValues.put(Col1, id)

contentValues.put(Col2, name)

contentValues.put(Col3, email)

contentValues.put(Col4, mobile)

contentValues.put(Col5, password)

sqLiteDatabase.update(Tablename, contentValues, "ID= ?", arrayOf(id))

return true

}

fun deleteData(id: String): Int {

val sqLiteDatabase = this.writableDatabase

return sqLiteDatabase.delete(Tablename, "ID =?", arrayOf(id))

}

companion object {

const val Databasename = "Student.db"

const val Tablename = "educations"

const val Col1 = "ID"

const val Col2 = "NAME"

const val Col3 = "EMAIL"

const val Col4 = "MOBILE"

const val Col5 = "PASSWORD"

}

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Sqlite Example with Kotlin

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