[패캠 안드로이드] Part2 Ch3.3 비밀 다이어리(3)

Part2 Ch3.3 비밀 다이어리(3)

activity_diary.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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/passwordNumberPickerColor1">

    <TextView
        android:id="@+id/diaryTitleTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        android:fontFamily="@font/nanumsquareroundb"
        android:text="나의 비밀을 적어보세요!"
        android:textSize="30sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/diaryEditText"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="30dp"
        android:background="@color/white"
        android:gravity="top|start"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/diaryTitleTextView">


    </EditText>
</androidx.constraintlayout.widget.ConstraintLayout>

AndroidManifest.xml

• MainActivity 아래 DiaryActivity 추가

<activity android:name=".DiaryActivity"
            android:theme="@style/Theme.Aoppart2chapter03.NoActionBar"/>

DiaryActivity.kt

• sharedPreference에 저장된 일기를 가져오고, diaryEditText가 변경될 때마다 저장될 수 있도록 함

• 이때, 한 글자씩 입력될 때마다 매번 sharedPreference에 저장이 되기 때문에 비효율적이다
  -> thread 기능을 이용하여 처리해주어야 한다 (내일 이어서...)

package fastcampus.aop.part2.chapter03

import android.content.Context
import android.os.Bundle
import android.os.PersistableBundle
import android.widget.EditText
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.edit
import androidx.core.widget.addTextChangedListener

class DiaryActivity: AppCompatActivity() {

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

        val diaryEditText : EditText = findViewById(R.id.diaryEditText)

        //sharedPreference에 저장된 일기 가져오기
        val myDiaryPreferences = getSharedPreferences("aop.part2.chapter03.myDiaryFile", Context.MODE_PRIVATE)
        val myDiary = myDiaryPreferences.getString("myDiaryKey", "")
        diaryEditText.setText(myDiary)

        //diaryEditText 변경될 때마다 저장될 수 있도록
        diaryEditText.addTextChangedListener {
            myDiaryPreferences.edit(){
                putString("myDiaryKey", diaryEditText.text.toString())
            }
        }
    }
}

📌참고자료

• sharedPreference
  https://developer.android.com/training/data-storage/shared-preferences?hl=ko