how to solve this startActivityForResult

Question

how to solve this kind of problem starActivityForResult please any budy guide me to solve this

Answer 1

startActivityForResult is deprecated following is new the way. Here is a full source code example

MainActivity

class MainActivity : AppCompatActivity() {

    private lateinit var tvResult:TextView
    private lateinit var btnNext:Button

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

        tvResult = findViewById(R.id.tv_result)
        btnNext = findViewById(R.id.btn_next)

        btnNext.setOnClickListener {
            openActivityForResult(Intent(this,SampleActivity::class.java))
        }

    }

    private var resultLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
        if (result.resultCode == Activity.RESULT_OK) {
            val mIntent: Intent? = result.data
            val mDataString = mIntent?.getStringExtra("result_data")
            tvResult.text = mDataString

        }
    }

    private fun openActivityForResult(mIntent: Intent) {
        resultLauncher.launch(mIntent)
    }
}

SampleActivity

class SampleActivity : AppCompatActivity() {

    private lateinit var btnDone: Button
    private val sampleData = "Sample Activity Result Data"

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

        btnDone = findViewById(R.id.btn_done)
        btnDone.setOnClickListener{
            returnForResult()
        }
    }

    private fun returnForResult(){
        val replyIntent = Intent()
        replyIntent.putExtra(
            "result_data",
            sampleData
        )
        setResult(Activity.RESULT_OK, replyIntent)
        finish()
    }
}

Answer 2

startActivityForResult is deprecated, meaning that it will no longer be supported going forward. That is why Android Studio is showing you the lines through the code. Instead, review this Stackoverflow post on alternative options: OnActivityResult method is deprecated, what is the alternative?