How to pass data from one activity to another in Android application

Question

I'm trying to create simple app where you type your data in one activity by editText and it's shown in another in TextView. But i really don't know how to make it work. As you can see this is simple code but right now when i click submit nothing happens on another activity. this is first activty

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }
    fun switchToActivity (view: View){
        val myIntent = Intent(this, Main2Activity::class.java)
        startActivity(myIntent)
    }
    override fun onActivityResult(requestCode: Int,
                                  resultCode: Int,
                                  myInten: Intent?) {
        var text2 = myInten?.getStringExtra("text")
        textView.setText(text2)
    }
}

And this is second

class Main2Activity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main2)
    }
    fun buttonListener (view: View){
        var text = editText.text.toString()

        val myIntent = Intent()
        myIntent.putExtra("textView", text)
        setResult(Activity.RESULT_OK, myIntent)
        finish()
    }
}

dev2qa.com/passing-data-between-activities-android-tutorial

Rajendra Mahato
– Rajendra Mahato

2019-05-07 22:47:27 +00:00
Commented May 7, 2019 at 22:47 — Rajendra Mahato
– Rajendra Mahato, Commented May 7, 2019 at 22:47

Son Truong · Accepted Answer · 2019-05-08 02:15:53Z

There are 2 issues with your code.

First, to receive result from another activity, you must use startActivityForResult() instead.

fun switchToActivity (view: View){
    val myIntent = Intent(this, Main2Activity::class.java)
    startActivityForResult(myIntent)
}

Second, you must use the same key when saving and retrieving result.

var text2 = myInten?.getStringExtra("textView")

Put it together.

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }

    fun switchToActivity (view: View){
        val myIntent = Intent(this, Main2Activity::class.java)
        startActivityForResult(myIntent)
    }

    override fun onActivityResult(requestCode: Int,
                                  resultCode: Int,
                                  myInten: Intent?) {
        var text2 = myInten?.getStringExtra("textView")
        textView.setText(text2)
    }
}

Alexander Gapanowich · Accepted Answer · 2019-05-07 22:41:36Z

0

You should use: startActivityForResult(myIntent) instead of: startActivity(myIntent)

answered May 7, 2019 at 22:41

Alexander Gapanowich

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