ActivityNavigatorExample

ActivityNavigatorExample.kt

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

        val intent = Intent(this, SecondActivity::class.java)
        intent.putExtra("STRING_PARAM", "Request string")
        startActivityForResult(intent, 1)
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (data != null) {
            val responseString = data.getStringExtra("RESPONSE")
        }
    }
}

// second activity
override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_second)

        val str = intent.getStringExtra("STRING_PARAM")

        val intent = Intent()
        intent.putExtra("RESPONSE", "Response string")
        setResult(Activity.RESULT_OK, intent)
        finish()
}