[코틀린코드연습장] startActivityForResult(3) . object

인텐트로 오브젝트를 넘겨보자. 

별도로 클래스를 만들어서 넘겨본다.  

[별도로 만든 클래스]

class TestClass: Parcelable {
    var data10 : Int = 0
    var data20 : String? = null

    companion object {
        @JvmField
        val CREATOR : Parcelable.Creator<TestClass> = object : Parcelable.Creator<TestClass> {
            override fun createFromParcel(source: Parcel?): TestClass {
                val test = TestClass()
                test.data10 = source?.readInt()!!
                test.data20 = source?.readString()
                return test
            }

            override fun newArray(size: Int): Array<TestClass?> {
                return arrayOfNulls<TestClass>(size)
            }
        }
    }

    override fun writeToParcel(dest: Parcel?, flags: Int) {
        dest?.writeInt(data10)
        dest?.writeString(data20)
    }

    override fun describeContents(): Int {
        return 0
    }
}

[메인 클래스]

class MainActivity : AppCompatActivity() {

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

        a1_btn1.setOnClickListener {
            var t1 = TestClass()
            t1.data10 = 100
            t1.data20 = "문자열1"

            var intent = Intent(this, Main2Activity::class.java)
            intent.putExtra("test1", t1)
            startActivityForResult(intent, 1)

        }
    }

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

        if (resultCode == Activity.RESULT_OK) {
            var t2 = data?.getParcelableExtra<TestClass>("test2")
            a1_txt2.text = "t2.data10 = ${t2?.data10}\n"
            a1_txt2.append("t2.data20 = ${t2?.data20}")
        }
    }
}

[세컨 클래스]

class Main2Activity : AppCompatActivity() {

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

        var t1 = intent.getParcelableExtra<TestClass>("test1")

        a2_txt1.text = "t1.data10 = ${t1.data10}\n"
        a2_txt1.append("t1.data20 = ${t1.data20}")

        a2_btn1.setOnClickListener {
            var t2 = TestClass()
            t2.data10 = 200
            t2.data20 = "문자열2"

            var intent2 = Intent(this, MainActivity::class.java)
            intent2.putExtra("test2", t2)
            setResult(Activity.RESULT_OK, intent2)
            finish()
        }
    }
}