??一、配置說明??

1. ??作用位置??

   需在模塊級?build.gradle或?build.gradle.kts文件的?android {}塊內添加：

   android {buildFeatures {viewBinding = true // Kotlin DSL 語法}
   }

   android {buildFeatures {viewBinding true // Groovy 語法}
   }

2. ??生成規則??

   • 為每個 XML 布局文件（如?activity_main.xml）生成對應的綁定類（如?ActivityMainBinding）。

   • 綁定類包含布局中所有帶?android:id的視圖引用，無需手動調用?findViewById()。

3. ??忽略特定布局??

   若無需為某布局生成綁定類，可在其根節點添加：

<LinearLayout...tools:viewBindingIgnore="true">
</LinearLayout>

二、使用示例??

??1. Activity 中綁定視圖?

class MainActivity : AppCompatActivity() {private lateinit var binding: ActivityMainBindingoverride fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)binding = ActivityMainBinding.inflate(layoutInflater)setContentView(binding.root) // 設置根視圖// 直接訪問視圖（類型安全 & 空安全）binding.textView.text = "Hello, View Binding!"binding.button.setOnClickListener { Toast.makeText(this, "Clicked", Toast.LENGTH_SHORT).show()}}
}

2. Fragment 中綁定視圖（避免內存泄漏）?

class ExampleFragment : Fragment() {private var _binding: FragmentExampleBinding? = nullprivate val binding get() = _binding!! // 非空斷言override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {_binding = FragmentExampleBinding.inflate(inflater, container, false)return binding.root}override fun onViewCreated(view: View, savedInstanceState: Bundle?) {binding.textView.text = "Fragment Loaded"}override fun onDestroyView() {super.onDestroyView()_binding = null // 釋放視圖引用}
}

三、核心優勢??

五、與 DataBinding 對比??