4-2 인텐트 연결해보기

firstActivity.kt 

 

package com.example.test

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.example.test.databinding.ActivityFirstBinding
import com.example.test.databinding.ActivitySecondBinding

class SecondActivity : AppCompatActivity() {

    private lateinit var binding: ActivitySecondBinding


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        binding = ActivitySecondBinding.inflate(layoutInflater)
        setContentView(binding.root)


        //리스너 설정
        binding.secondbutton.setOnClickListener {
            val intent = Intent(this@SecondActivity, FirstActivity::class.java)
            finish()
        }

    }
}

 

activity_first.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".FirstActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="첫번째 액티비티 입니다."
        app:layout_constraintBottom_toTopOf="@+id/firstbutton_gosecond"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_chainStyle="packed" />

    <Button
        android:id="@+id/firstbutton_gosecond"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="두번째 액티비티 시작하기"
        android:background="@drawable/bs_button1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="@+id/textView"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@+id/textView"
        app:layout_constraintTop_toBottomOf="@+id/textView" />

</androidx.constraintlayout.widget.ConstraintLayout>

secondActivity.kt

package com.example.test

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.example.test.databinding.ActivityFirstBinding
import com.example.test.databinding.ActivitySecondBinding

class SecondActivity : AppCompatActivity() {

    private lateinit var binding: ActivitySecondBinding


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        binding = ActivitySecondBinding.inflate(layoutInflater)
        setContentView(binding.root)


        //리스너 설정
        binding.secondbutton.setOnClickListener {
            val intent = Intent(this@SecondActivity, FirstActivity::class.java)
            finish()
        }

    }
}

activity_second.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SecondActivity">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="두번째 액티비티 입니다."
        app:layout_constraintBottom_toTopOf="@+id/secondbutton"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_chainStyle="packed" />

    <Button
        android:id="@+id/secondbutton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="닫기"
        android:background="@drawable/bs_button1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="@+id/textView2"
        app:layout_constraintStart_toStartOf="@+id/textView2"
        app:layout_constraintTop_toBottomOf="@+id/textView2" />
</androidx.constraintlayout.widget.ConstraintLayout>

 

 

 

 

잘 이해했당... !! 

 

^ㅁ^ / 야호 

 

 

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