[add] #5 BindingActivity, BindingFragment 추가

app/src/main/java/org/sopt/sample/base/BindingActivity.kt

@@ -0,0 +1,17 @@
+package org.sopt.sample.base
+
+import android.os.Bundle
+import androidx.annotation.LayoutRes
+import androidx.appcompat.app.AppCompatActivity
+import androidx.databinding.DataBindingUtil
+import androidx.databinding.ViewDataBinding
+
+abstract class BindingActivity<B : ViewDataBinding>(@LayoutRes private val layoutRes: Int) :
+    AppCompatActivity() {
+    lateinit var binding: B
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = DataBindingUtil.setContentView(this, layoutRes)
+    }
+}

app/src/main/java/org/sopt/sample/base/BindingFragment.kt

@@ -0,0 +1,30 @@
+package org.sopt.sample.base
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.annotation.LayoutRes
+import androidx.databinding.DataBindingUtil
+import androidx.databinding.ViewDataBinding
+import androidx.fragment.app.Fragment
+
+abstract class BindingFragment<B : ViewDataBinding>(@LayoutRes private val layoutResId: Int) :
+    Fragment() {
+    private var _binding: B? = null
+    val binding get() = requireNotNull(_binding!!) { "${this::class.java.simpleName}에서 에러가 발생했습니다." }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?,
+    ): View {
+        _binding = DataBindingUtil.inflate(inflater, layoutResId, container, false)
+        return binding.root
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+}