feat(*): Activity和Fragment内联函数-1

Author: AndroidCoderPeng

app/build.gradle

@@ -24,6 +24,10 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    viewBinding {
+        enabled true
+    }
 }
 
 dependencies {

app/src/main/java/com/pengxh/kt/lib/MainActivity.kt

@@ -1,32 +1,22 @@
 package com.pengxh.kt.lib
 
 import android.os.Bundle
-import com.pengxh.kt.lite.base.KotlinBaseActivity
+import androidx.appcompat.app.AppCompatActivity
+import com.pengxh.kt.lib.databinding.ActivityMainBinding
+import com.pengxh.kt.lite.extensions.binding
 import com.pengxh.kt.lite.extensions.show
 import com.pengxh.kt.lite.widget.SteeringWheelView
-import kotlinx.android.synthetic.main.activity_main.*
 
-class MainActivity : KotlinBaseActivity() {
+class MainActivity : AppCompatActivity() {
 
     private val kTag = "MainActivity"
     private val context = this@MainActivity
+    private val binding: ActivityMainBinding by binding()
 
-    override fun initLayoutView(): Int = R.layout.activity_main
-
-    override fun setupTopBarLayout() {
-
-    }
-
-    override fun observeRequestState() {
-
-    }
-
-    override fun initData(savedInstanceState: Bundle?) {
-
-    }
-
-    override fun initEvent() {
-        steeringWheelView.setOnWheelTouchListener(object : SteeringWheelView.OnWheelTouchListener {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding.steeringWheelView.setOnWheelTouchListener(object :
+            SteeringWheelView.OnWheelTouchListener {
             override fun onCenterClicked() {
                 "onCenterClicked".show(context)
             }
@@ -52,12 +42,15 @@ class MainActivity : KotlinBaseActivity() {
                     SteeringWheelView.Direction.LEFT -> {
                         "LEFT onActionTurnUp".show(context)
                     }
+
                     SteeringWheelView.Direction.TOP -> {
                         "TOP onActionTurnUp".show(context)
                     }
+
                     SteeringWheelView.Direction.RIGHT -> {
                         "RIGHT onActionTurnUp".show(context)
                     }
+
                     SteeringWheelView.Direction.BOTTOM -> {
                         "BOTTOM onActionTurnUp".show(context)
                     }

lite/build.gradle

@@ -26,6 +26,10 @@ android {
             coroutines 'enable'
         }
     }
+
+    viewBinding {
+        enabled true
+    }
 }
 
 dependencies {

lite/src/main/java/com/pengxh/kt/lite/extensions/Activity.kt

@@ -0,0 +1,18 @@
+package com.pengxh.kt.lite.extensions
+
+import android.view.LayoutInflater
+import androidx.activity.ComponentActivity
+import androidx.viewbinding.ViewBinding
+
+inline fun <reified VB : ViewBinding> ComponentActivity.binding() =
+    lazy(LazyThreadSafetyMode.NONE) {
+        inflateBinding<VB>(layoutInflater).also {
+            setContentView(it.root)
+        }
+    }
+
+inline fun <reified VB : ViewBinding> inflateBinding(layoutInflater: LayoutInflater): VB {
+    return VB::class.java
+        .getMethod("inflate", LayoutInflater::class.java)
+        .invoke(null, layoutInflater) as VB
+}

lite/src/main/java/com/pengxh/kt/lite/extensions/Fragment.kt

@@ -0,0 +1,36 @@
+package com.pengxh.kt.lite.extensions
+
+import android.os.Handler
+import android.os.Looper
+import android.view.View
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.LifecycleOwner
+import androidx.viewbinding.ViewBinding
+import kotlin.properties.ReadOnlyProperty
+import kotlin.reflect.KProperty
+
+inline fun <reified VB : ViewBinding> Fragment.bindView() = FragmentBindingDelegate(VB::class.java)
+
+class FragmentBindingDelegate<VB : ViewBinding>(private val clazz: Class<VB>) :
+    ReadOnlyProperty<Fragment, VB> {
+
+    private var isInitialized = false
+    private var _binding: VB? = null
+    private val binding: VB get() = _binding!!
+    private val handler by lazy { Handler(Looper.getMainLooper()) }
+
+    override fun getValue(thisRef: Fragment, property: KProperty<*>): VB {
+        if (!isInitialized) {
+            thisRef.viewLifecycleOwner.lifecycle.addObserver(object : DefaultLifecycleObserver {
+                override fun onDestroy(owner: LifecycleOwner) {
+                    handler.post { _binding = null }
+                }
+            })
+            _binding = clazz.getMethod("bind", View::class.java)
+                .invoke(null, thisRef.requireView()) as VB
+            isInitialized = true
+        }
+        return _binding!!
+    }
+}