경북대 Android_남지연 2주차 과제_step1

README.md

@@ -1 +1,6 @@
 # android-map-keyword
+## 카카오맵 클론 코딩을 위한 시작
+
+### step 1
+- 검색어 입력 및 검색 결과를 표시할 기본 레이아웃을 구현한다.
+- 검색에 사용될 데이터를 로컬 데이터베이스에 생성한다.

app/src/main/java/campus/tech/kakao/map/MainActivity.kt

@@ -1,11 +1,44 @@
 package campus.tech.kakao.map
 
+import android.database.sqlite.SQLiteDatabase
 import android.os.Bundle
+import android.widget.EditText
+import android.widget.ImageButton
+import android.widget.ListView
+import android.widget.TextView
 import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
+
+    private lateinit var searchEditText: EditText
+    private lateinit var cancelButton: ImageButton
+    private lateinit var noResultsTextView: TextView
+    private lateinit var resultsListView: ListView
+
+    private lateinit var dbHelper: PlaceDBHelper
+    private lateinit var db: SQLiteDatabase
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        searchEditText = findViewById(R.id.searchEditText)
+        cancelButton = findViewById(R.id.cancelButton)
+        noResultsTextView = findViewById(R.id.noResultsTextView)
+        resultsListView = findViewById(R.id.resultsListView)
+
+        dbHelper = PlaceDBHelper(this)
+
+        try {
+            db = dbHelper.writableDatabase
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+
+        cancelButton.setOnClickListener {
+            searchEditText.text.clear()
+        }
     }
 }
+
+

app/src/main/java/campus/tech/kakao/map/PlaceDBHelper.kt

@@ -0,0 +1,73 @@
+package campus.tech.kakao.map
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import android.database.sqlite.SQLiteOpenHelper
+
+private const val TABLE_NAME = "places"
+private const val COLUMN_CATEGORY = "category"
+private const val COLUMN_TITLE = "title"
+private const val COLUMN_LOCATION = "location"
+
+class PlaceDBHelper(context: Context) : SQLiteOpenHelper(context, DB_NAME, null, DB_VERSION) {
+
+    override fun onCreate(db: SQLiteDatabase?) {
+        db?.execSQL(SQL_CREATE_TABLE)
+        insertInitialRecords(db)
+    }
+
+    override fun onUpgrade(db: SQLiteDatabase?, oldVersion: Int, newVersion: Int) {
+        db?.execSQL(SQL_DROP_TABLE)
+        onCreate(db)
+    }
+
+    private fun insertInitialRecords(db: SQLiteDatabase?) {
+        db?.beginTransaction()
+        try {
+            db?.let {
+                insertCafeRecords(it)
+                insertPharmacyRecords(it)
+            }
+            db?.setTransactionSuccessful()
+        } finally {
+            db?.endTransaction()
+        }
+    }
+
+    private fun insertCafeRecords(db: SQLiteDatabase) {
+        val category = "카페"
+        val titleBase = "카페"
+        val locationBase = "서울 성동구 성수동"
+
+        for (i in 1..20) {
+            val title = "$titleBase$i"
+            val location = "$locationBase $i"
+            db.execSQL(
+                "INSERT INTO $TABLE_NAME ($COLUMN_CATEGORY, $COLUMN_TITLE, $COLUMN_LOCATION) VALUES ('$category', '$title', '$location');"
+            )
+        }
+    }
+    private fun insertPharmacyRecords(db: SQLiteDatabase) {
+        val category = "약국"
+        val titleBase = "약국"
+        val locationBase = "서울 강남구 대치동"
+
+        for (i in 1..20) {
+            val title = "$titleBase$i"
+            val location = "$locationBase $i"
+            db.execSQL(
+                "INSERT INTO $TABLE_NAME ($COLUMN_CATEGORY, $COLUMN_TITLE, $COLUMN_LOCATION) VALUES ('$category', '$title', '$location');"
+            )
+        }
+    }
+    companion object {
+        private const val DB_VERSION = 1
+        private const val DB_NAME = "location.db"
+        private const val SQL_CREATE_TABLE =
+            "CREATE TABLE $TABLE_NAME (" +
+                    "$COLUMN_CATEGORY TEXT NOT NULL, " +
+                    "$COLUMN_TITLE TEXT NOT NULL, " +
+                    "$COLUMN_LOCATION TEXT NOT NULL);"
+        private const val SQL_DROP_TABLE = "DROP TABLE IF EXISTS $TABLE_NAME"
+    }
+}

app/src/main/res/layout/activity_main.xml

@@ -1,19 +1,56 @@
 <?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:id="@+id/main"
+<RelativeLayout 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"
+tools:context=".MainActivity">
+
+<RelativeLayout
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".MainActivity">
+    android:layout_height="wrap_content"
+    android:layout_marginTop="16dp"
+    android:layout_marginStart="16dp"
+    android:layout_marginEnd="16dp">
 
-    <TextView
-        android:layout_width="wrap_content"
+    <EditText
+        android:id="@+id/searchEditText"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        android:layout_alignParentStart="true"
+        android:layout_toStartOf="@id/cancelButton"
+        android:layout_weight="1"
+        android:hint="검색어를 입력해 주세요."
+        android:padding="8dp"
+        android:background="@android:drawable/edit_text" />
+
+    <ImageButton
+        android:id="@+id/cancelButton"
+        android:layout_width="48dp"
+        android:layout_height="48dp"
+        android:layout_alignParentEnd="true"
+        android:layout_centerVertical="true"
+        android:background="?android:attr/selectableItemBackground"
+        android:padding="8dp"
+        android:scaleType="centerInside"
+        android:src="@drawable/cancel" />
+
+</RelativeLayout>
+
+<TextView
+    android:id="@+id/noResultsTextView"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_centerInParent="true"
+    android:text="검색 결과가 없습니다."
+    android:textSize="16sp"
+    android:textColor="@color/grey"
+    android:gravity="center"/>
+
+    <!-- 이후 2단계에서 RecyclerView로 수정할 것임 -->
+    <ListView
+    android:id="@+id/resultsListView"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginTop="16dp" />
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+    </RelativeLayout>

app/src/main/res/values/colors.xml

@@ -2,4 +2,5 @@
 <resources>
     <color name="black">#FF000000</color>
     <color name="white">#FFFFFFFF</color>
+    <color name="grey">#FF808080</color>
 </resources>