feat | DB 설정

app/src/main/java/com/example/jaringobi/MainActivity.kt

@@ -3,14 +3,18 @@ package com.example.jaringobi
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import com.example.jaringobi.databinding.ActivityMainBinding
+import com.example.jaringobi.db.DBHelper
 
 class MainActivity : AppCompatActivity() {
     private lateinit var binding: ActivityMainBinding
+    private lateinit var dbHelper: DBHelper
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
+
+        dbHelper = DBHelper(this)
     }
 }

app/src/main/java/com/example/jaringobi/db/Contract.kt

@@ -0,0 +1,46 @@
+package com.example.jaringobi.db
+
+import android.provider.BaseColumns
+
+object Contract {
+    const val DATABASE_NAME = "jaringobi.db"
+    const val DATABASE_VERSION = 1
+
+    object GoalEntry : BaseColumns {
+        private const val TABLE_NAME = "goals"
+        private const val COLUMN_YEAR = "year"
+        private const val COLUMN_MONTH = "month"
+        private const val COLUMN_AMOUNT = "amount"
+        private const val COLUMN_CURRENT_SPENT = "current_spent"
+
+        const val CREATE_TABLE =
+            "CREATE TABLE $TABLE_NAME" +
+                "(" +
+                "${BaseColumns._ID} INTEGER PRIMARY KEY AUTOINCREMENT," +
+                "$COLUMN_YEAR INTEGER NOT NULL, " +
+                "$COLUMN_MONTH INTEGER NOT NULL, " +
+                "$COLUMN_AMOUNT INTEGER NOT NULL, " +
+                "$COLUMN_CURRENT_SPENT INTEGER NOT NULL DEFAULT 0" +
+                ")"
+
+        const val DROP_TABLE = "DROP TABLE IF EXISTS $TABLE_NAME"
+    }
+
+    object ExpenseEntry : BaseColumns {
+        private const val TABLE_NAME = "expenses"
+        private const val COLUMN_PLACE = "place"
+        private const val COLUMN_AMOUNT = "amount"
+        private const val COLUMN_DATE = "date"
+
+        const val CREATE_TABLE =
+            "CREATE TABLE $TABLE_NAME" +
+                "(" +
+                "${BaseColumns._ID} INTEGER PRIMARY KEY AUTOINCREMENT," +
+                "$COLUMN_PLACE TEXT NOT NULL," +
+                "$COLUMN_AMOUNT INTEGER NOT NULL," +
+                "$COLUMN_DATE TEXT NOT NULL" +
+                ")"
+
+        const val DROP_TABLE = "DROP TABLE IF EXISTS $TABLE_NAME"
+    }
+}

app/src/main/java/com/example/jaringobi/db/DBHelper.kt

@@ -0,0 +1,34 @@
+package com.example.jaringobi.db
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import android.database.sqlite.SQLiteOpenHelper
+import com.example.jaringobi.db.Contract.ExpenseEntry
+import com.example.jaringobi.db.Contract.GoalEntry
+
+class DBHelper(context: Context) : SQLiteOpenHelper(
+    context,
+    Contract.DATABASE_NAME,
+    null,
+    Contract.DATABASE_VERSION,
+) {
+    override fun onCreate(db: SQLiteDatabase?) {
+        Thread {
+            db?.execSQL(ExpenseEntry.CREATE_TABLE)
+            db?.execSQL(GoalEntry.CREATE_TABLE)
+        }.start()
+    }
+
+    override fun onUpgrade(
+        db: SQLiteDatabase?,
+        oldVersion: Int,
+        newVersion: Int,
+    ) {
+        Thread {
+            db?.execSQL(ExpenseEntry.DROP_TABLE)
+            db?.execSQL(GoalEntry.DROP_TABLE)
+        }.start()
+
+        onCreate(db)
+    }
+}