CODEWITHSUNDEEP
androidkotlin
zasaz
zasaz

Reputation: 2524

Get string extra from activity Kotlin

I want to get a string extra in another activity from an intent. This is the way to create my intent

val intent = Intent(this, Main2Activity::class.java)
intent.putExtra("samplename", "abd")
startActivity(intent)

How can i get the value of this intent in the another activity

Upvotes: 69

Views: 153209

Answers (8)

Ahmad Aghazadeh
Ahmad Aghazadeh

Reputation: 17131

Can use this code :

val bundle = intent.extras
var sampleName: String = ""
if (bundle != null) {
    sampleName = bundle.getString("samplename")
}

Upvotes: 7

zasaz
zasaz

Reputation: 2524

Answer found, in the next activity, you have to do this to get the string:

val ss:String = intent.getStringExtra("samplename").toString()

Upvotes: 89

Tushar Srivastava
Tushar Srivastava

Reputation: 820

First you need to initialize the intent variable. Then take out the data like we do in java :) 

val intent: Intent = intent
var data = intent.getStringExtra("mydata")

Upvotes: 2

Samir
Samir

Reputation: 6617

LOAD 

val value: String = txt_act_main.text.toString() // or just your string
val intent = Intent(this, SecondActivity::class.java)
intent.putExtra("value", value)
startActivity(intent)

//option 2 all inner classes should be implemented to Serializable

   getIntent().putExtra("complexObject", clickedTitle);

GET

var bundle :Bundle ?=intent.extras
var message = bundle!!.getString("value") // 1
var strUser: String = intent.getStringExtra("value") // 2
Toast.makeText(this, message, Toast.LENGTH_SHORT).show()

//option 2 

 var myProg = intent.getSerializableExtra("complexObject") as MenuModel

IMPLICIT (To Share with other apps)

val value: String = txt_act_main.text.toString()
var intent = Intent()
intent.action = Intent.ACTION_SEND
intent.putExtra(Intent.EXTRA_TEXT, value)
intent.type="text/plain"
startActivity(Intent.createChooser(intent,"Share to "))

Upvotes: 29

Jimale Abdi
Jimale Abdi

Reputation: 2864

You can use this simple Kotlin Extension

fun Intent.getData(key: String): String {
    return extras?.getString(key) ?: "intent is null"
}

this Extension checks if the intent value is null, if the value is null it will return intent is null otherwise, it will return the value

use it like this

val username = intent.getData("username")

Upvotes: 2

Rahul ShaRma
Rahul ShaRma

Reputation: 99

you can check if the intent value is null or not 

val bundle :Bundle ?=intent.extras
    if (bundle!=null){
        val message = bundle.getString("object") // 1

        Toast.makeText(this, message, Toast.LENGTH_SHORT).show()

    }

Upvotes: 6

Albert Gao
Albert Gao

Reputation: 3769

The accepted answer doesn't solve the case where the intent is not there. Because when the key is not exist in intent, getStringExtra() will give you null even its signature indicates a String rather than a String?.

You can use val text:String = intent.getStringExtra(intentKey) ?: "" to make sure no NPE happened.

But one more answer here:

This is for the case where, you try to retrieve the string from intent, if the value is there, we get the value, otherwise, it will go back to the previous screen because this intent is critical. Something wrong will happen but we don't want to crash the activity.

private fun getStringFromIntentOrShowError(intentKey: String):String {
    val text:String? = intent.getStringExtra(intentKey)

    if (text == null) {
        showDialog(
            "Error", 
            "No $intentKey found"
        ) {
            it.dismiss()
            finish()
        }
        return ""
    }

    return text
}

// I use anko to show a dialog, you can use your one.
private fun showDialog(
    title:String,
    message:String,
    yesButtonCallback: (d:DialogInterface) -> Unit
) {
    alert(message, title){ yesButton{
            yesButtonCallback(it)
    } }.show()
}

Then you can use it like this:

val text:String = getStringFromIntentOrShowError("asd")

and text will always have a value

Upvotes: 5

kukroid
kukroid

Reputation: 420

In Main2Activity you can have your code like this :

    val intent = getIntent();
    val myValue = intent.getStringExtra("key")
    Log.d(TAG,"myValue"+myValue)

Upvotes: 5

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