[코틀린코드연습장] startActivityForResult(2)

다른 액티비티로, 종료시점에 

데이터를 보내는 방식이다.

[메인액티비티]

class MainActivity : AppCompatActivity() {

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

        a1_btn1.setOnClickListener {
            var intent = Intent(this, Main2Activity::class.java)
            intent.putExtra("String", "StringData")
            intent.putExtra("Int", 1)
            intent.putExtra("Double", 1.0)
            intent.putExtra("Boolean", true)
            startActivityForResult(intent, 1)
        }
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)

        if(resultCode == Activity.RESULT_OK) {
            a1_txt1.text = "${data?.getStringExtra("String")}\n" +
                    "${data?.getIntExtra("Int",0)}\n" +
                    "${data?.getDoubleExtra("Double", 0.0)}\n" +
                    "${data?.getBooleanExtra("Boolean", false)}"
        }
    }
}

[액티비티1]

class Main2Activity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main2)

        var data1 = intent.getStringExtra("String")
        var data2 = intent.getIntExtra("Int", 0)
        var data3 = intent.getDoubleExtra("Double", 0.0)
        var data4 = intent.getBooleanExtra("Boolean", false)

        a2_txt1.text = "${data1}  :::  ${data2}\n" +
                "${data3}:::${data4}"

        a2_btn1.setOnClickListener {
            var intent = Intent(this, MainActivity::class.java)
            intent.putExtra("String", "StringExtra")
            intent.putExtra("Int", 1)
            intent.putExtra("Double", 1.0)
            intent.putExtra("Boolean", true)
            setResult(Activity.RESULT_OK, intent)
            finish()
        }
    }
}