How to pass the values from activity to another activity - kotlin

Question

As I'm learning Kotlin for Android development, I'm now trying the basic programs like hello world and how to navigate from one activity to another activity, there is no issue with this.
When I move from one activity to another, it works fine, but I do not know how to pass the values between the activities.
I tried to set the values in one activity and retrieved them in another activity it does not work.
Please see the code snippet below
This is my main activity where I take the username and password from edit text and setting to the intent:
class MainActivity : AppCompatActivity() {
val userName = null
val password = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
button.setOnClickListener {
val intent = Intent(this#MainActivity,SecondActivity::class.java);
var userName = username.textø
var password = password_field.text
intent.putExtra("Username", userName)
intent.putExtra("Password", password)
startActivity(intent);
}
}
}
This is my second activity where I have to receive values from the main activity
class SecondActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_second)
var strUser: String = intent.getStringExtra("Username")
var strPassword: String = intent.getStringExtra("Password")
user_name.setText("Seelan")
passwor_print.setText("Seelan")
}
}
Please guide me on how to do this, whether I have some other way to do this in Kotlin if not by intent.

Answer 1

Send value from HomeActivity
val intent = Intent(this#HomeActivity,ProfileActivity::class.java)
intent.putExtra("Username","John Doe")
startActivity(intent)
Get values in ProfileActivity
val profileName=intent.getStringExtra("Username")

Answer 2

I'm on mobile, you must test by yourself.
Try to make a CharSequence to a String in MainActivity , you have put a CharSequence rather than a String, for example:
var userName = username.text.toString()
var password = password_field.text.toString()

Answer 3

In Kotlin, you can pass the data simply by using the Intents. You can directly put your data in intent or you can write those data in bundle and send that bundle to another activity using the intent.
val intent = Intent(this#HomeActivity,ProfileActivity::class.java);
intent.putExtra("profileName", "John Doe")
var b = Bundle()
b.putBoolean("isActive", true)
intent.putExtras(b)
startActivity(intent);

Answer 4

You can simply use the intents and bundle to send data from one activity to another activity.
val intent = Intent(this#OneActivity,TwoActivity::class.java);
intent.putExtra("username", userName)
startActivity(intent);

Answer 5

//On Click on Button
var but = findViewById<Button>(R.id.buttionActivity_two) as Button
but.setOnClickListener {
//Define intent
var intent = Intent(applicationContext,MainActivity::class.java)
// Here "first" is key and 123 is value
intent.putExtra("first",123)
startActivity(intent)
}
}
// If Get In Into Other Activity
var Intent1: Intent
Intent1= getIntent()
//Here first is key and 0 is default value
var obj :Int = Intent1.getIntExtra("first",0);
Log.d("mytag","VAlue is==>"+obj)

Answer 6

first you should do this,
var userName = username.text.toString()
var password = password_field.text.toString()
Add Anko dependency.
implementation "org.jetbrains.anko:anko:0.10.4"
information passing inside MainActivity() is like
startActivity<SecondActivity>("Username" to userName,"Password" to password )
get information from SecondActivity() is,
val profileName=intent.getStringExtra("Username")

Answer 7

You can just access the value without using extras or intent. Simply use companion object in MainActivity:
companion object{
val userName: String = String()
val password: String = String()
}
In SecondActivity:
var strUser: String = MainActivity.username
var strPassword: String = MainActivity.password
And you can access the values from multiple activities easily.

Answer 8

Send data
val Name=findViewById<EditText>(R.id.editTextTextPersonName)
val Name2=findViewById<EditText>(R.id.editTextTextPersonName2)
val name=Name.text.toString()
val age=Name2.text.toString()
val intent1=Intent(this,Second::class.java).also {
it.putExtra("Username",name)
it.putExtra("Age",age)
startActivity(it);
}
Receive data
val name=intent.getStringExtra ("Username")
val age = intent.getStringExtra("Age")
val textView5=findViewById<TextView>(R.id.textView).apply {
text= "Name = $name"
}
val textView6=findViewById<TextView>(R.id.textView2).apply {
text= "Age = $age"
}