[Kotlin] Activity 간의 데이터 전달

1. Intent(+Serializable, Parcelable) 이용하는 방법

2. startActivityForResult 이용하는 방법

---

1. Intent(+Serializable, Parcelable) 이용하는 방법

 

SerializablePrivacy.kt

package com.jwsoft.kotlinproject

import java.io.Serializable

class SerializablePrivacy(
    var height: Int,
    var weight: Int
) : Serializable

 

 

 

ParcelableDetail.kt

package com.jwsoft.kotlinproject

import android.os.Parcel
import android.os.Parcelable

class ParcelableDetail(
    var phone: String?,
    var address: String?
) : Parcelable {

    constructor(parcel: Parcel) : this(
        parcel.readString(),
        parcel.readString()
    )

    override fun writeToParcel(parcel: Parcel, flags: Int) {
        parcel.writeString(phone)
        parcel.writeString(address)
    }

    override fun describeContents(): Int {
        return 0
    }

    companion object CREATOR : Parcelable.Creator<ParcelableDetail> {
        override fun createFromParcel(parcel: Parcel): ParcelableDetail {
            return ParcelableDetail(parcel)
        }

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

}

 

 

 

 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btnMoveToSub"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAllCaps="false"
        android:text="Move To Sub Activity"
        android:textSize="26dp"/>

</LinearLayout>

activity_main.xml

 

 

 

MainActivity.kt

package com.jwsoft.kotlinproject

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

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

        btnMoveToSub.setOnClickListener {
            val intent = Intent(this, SubActivity::class.java)
            intent.putExtra("name", "James Kim")
            intent.putExtra("age", 30)
            intent.putExtra("serializablePrivacy", SerializablePrivacy(183, 80))
            intent.putExtra("parcelableDetail", ParcelableDetail("010-1234-1234", "Seoul"))

            startActivity(intent)
        }
    }

}

 

 

 

 

 

 

activity_sub.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    tools:context=".SubActivity">

    <TextView
        android:id="@+id/tvName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30dp"
        tools:text="이름"/>

    <TextView
        android:id="@+id/tvAge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30dp"
        tools:text="나이"/>

    <TextView
        android:id="@+id/tvHeight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30dp"
        tools:text="키"/>

    <TextView
        android:id="@+id/tvWeight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30dp"
        tools:text="몸무게"/>

    <TextView
        android:id="@+id/tvPhone"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30dp"
        tools:text="핸드폰번호"/>

    <TextView
        android:id="@+id/tvAddress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30dp"
        tools:text="주소"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30dp"/>

</LinearLayout>

activity_sub.xml

 

 

 

SubActivity.kt

package com.jwsoft.kotlinproject

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_sub.*

class SubActivity : AppCompatActivity() {

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

        val name = intent.extras?.getString("name")
        val age = intent.extras?.getInt("age")
        val privacy = intent.extras?.get("serializablePrivacy") as SerializablePrivacy
        val detail = intent.extras?.get("parcelableDetail") as ParcelableDetail

        tvName.text = name
        tvAge.text = age.toString()
        tvHeight.text = privacy.height.toString()
        tvWeight.text = privacy.weight.toString()
        tvPhone.text = detail.phone
        tvAddress.text = detail.address
    }

}

실행 결과

 

 

 

 

---

2. startActivityForResult 이용하는 방법

 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/tvText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30dp"
        tools:text="이름"/>

    <Button
        android:id="@+id/btnMoveToSub"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAllCaps="false"
        android:text="Move To Sub"
        android:textSize="30dp"/>

</LinearLayout>

activity_main.xml

 

 

 

MainActivity.kt

package com.jwsoft.kotlinproject

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    companion object {
        const val SUB_ACTIVITY_CODE = 1002
    }

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

        btnMoveToSub.setOnClickListener {
            val intent = Intent(this, SubActivity::class.java)
            startActivityForResult(intent, SUB_ACTIVITY_CODE)
        }
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode == SUB_ACTIVITY_CODE && resultCode == RESULT_OK) {
            val name = data!!.getStringExtra("name")
            tvText.text = name
        }
    }
}

 

 

 

 

 

activity_sub.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    tools:context=".SubActivity">

    <Button
        android:id="@+id/btnMoveToMain"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAllCaps="false"
        android:text="Move To Main"
        android:textSize="30dp"/>

</LinearLayout>

activity_sub.xml

 

 

 

SubActivity.kt

package com.jwsoft.kotlinproject

import android.app.Activity
import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_sub.*

class SubActivity : AppCompatActivity() {

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

        btnMoveToMain.setOnClickListener {
            val intent = Intent(this, MainActivity::class.java)
            intent.putExtra("name", "James Kim")
            setResult(Activity.RESULT_OK, intent)
            finish()
        }
    }

}

실행 결과