How to Pass Data from One Activity to Another activity in kotlin Android

       How to Pass Data from One Activity to Another activity in kotlin Android 

How to Pass Data from One Activity to Another Activity in kotlin Android

In this tutorial, you will learn to pass data from one activity to another Activity  in kotlin android with and without using intent.

1.    Using Intent

2.    Using Global Variables

How to Pass Data from One Activity to Another in Android

Sending Data:

val intent = Intent(context, DestinationActivityName::class.java)

intent.putExtra(Key, Value)

startActivity(intent)

Here I am sending just one value, in the same way, you can attach more values by using putExtra() method.

Retrieving Data:

var intent = getIntent()

var str = intent.getStringExtra(Key)

Full Example  How to Pass Data from One Activity to Another in kotlin Android

1.MainActivity.kt:

import android.content.Intent

import android.support.v7.app.AppCompatActivity

import android.os.Bundle

import android.view.View

import android.widget.Button

import android.widget.EditText

class First:AppCompatActivity() {

  internal var textBox:EditText

  internal var passButton:Button

  protected fun onCreate(savedInstanceState:Bundle) {

    super.onCreate(savedInstanceState)

    setContentView(R.layout.activity_first)

    textBox = findViewById(R.id.textBox) as EditText

    passButton = findViewById(R.id.passButton) as Button

    passButton.setOnClickListener(object:View.OnClickListener() {

      fun onClick(v:View) {

        val str = textBox.getText().toString()

        val intent = Intent(getApplicationContext(), Second::class.java)

        intent.putExtra("message", str)

        startActivity(intent)

      }

    })

  }

}

2.activity_main:

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:padding="15dp"

    tools:context="com.androidexample.First"

    android:orientation="vertical">

    <EditText

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/textBox"

        android:hint="Enter Your Message"/>

    <Button

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/passButton"

        android:text="Pass"/>

</LinearLayout>

3.Second_Activity.kt:

import android.content.Intent

import android.support.v7.app.AppCompatActivity

import android.os.Bundle

import android.widget.TextView

class Second_Activity:AppCompatActivity() {

  internal var text:TextView

  protected fun onCreate(savedInstanceState:Bundle) {

    super.onCreate(savedInstanceState)

    setContentView(R.layout.activity_second)

    text = findViewById(R.id.text) as TextView

    val intent = getIntent()

    val str = intent.getStringExtra("message")

    text.setText(str)

  }

}

4.activity_second:

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:padding="15dp"

    tools:context="com.androidexample.Second">

    <TextView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text=""

        android:id="@+id/text"/>

</LinearLayout>

5.manifest.xml:

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 

    package="com.javatpoint.hello" 

    android:versionCode="1" 

    android:versionName="1.0" > 

    

    <application 

        android:icon="@drawable/ic_launcher" 

        android:label="@string/app_name" 

        android:theme="@style/AppTheme" > 

        <activity 

            android:name=".MainActivity" 

            android:label="@string/title_activity_main" > 

            <intent-filter> 

                <action android:name="android.intent.action.MAIN" /> 

 

                <category android:name="android.intent.category.LAUNCHER" /> 

            </intent-filter> 

        </activity> 

        <activity 

            android:name=". Second_Activity " 

            android:label="@string/title_activity_main" /> 

    </application> 

 

</manifest>