Implement ViewPowerMenuLazy

powermenu/src/main/java/com/skydoves/powermenu/kotlin/ActivityPowerMenuLazy.kt

@@ -27,8 +27,8 @@ import kotlin.reflect.KClass
  *
  * @param context A context for creating resources of the [PowerMenu] lazily.
  * @param lifecycleOwner A [LifecycleOwner] for dismissing automatically when the [LifecycleOwner] is being destroyed.
- * This will prevents memory leak: [Avoid Memory Leak](https://github.com/skydoves/balloon#avoid-memory-leak).
- * @param clazz A [PowerMenu.Factory] kotlin class for creating a new instance of the Balloon.
+ * This will prevents memory leak: [Avoid Memory Leak](https://github.com/skydoves/powermenu#avoid-memory-leak).
+ * @param clazz A [PowerMenu.Factory] kotlin class for creating a new instance of the PowerMenu.
  */
 @PublishedApi
 internal class ActivityPowerMenuLazy<out T : PowerMenu.Factory>(

powermenu/src/main/java/com/skydoves/powermenu/kotlin/FragmentPowerMenuLazy.kt

@@ -25,8 +25,8 @@ import kotlin.reflect.KClass
  * Tied to the given fragment's lifecycle and, [clazz].
  *
  * @param fragment An instance of the [PowerMenu] will be created in this Fragment lazily.
- * This will prevents memory leak: [Avoid Memory Leak](https://github.com/skydoves/balloon#avoid-memory-leak).
- * @param clazz A [PowerMenu.Factory] kotlin class for creating a new instance of the Balloon.
+ * This will prevents memory leak: [Avoid Memory Leak](https://github.com/skydoves/powermenu#avoid-memory-leak).
+ * @param clazz A [PowerMenu.Factory] kotlin class for creating a new instance of the PowerMenu.
  */
 @PublishedApi
 internal class FragmentPowerMenuLazy<out T : PowerMenu.Factory>(

powermenu/src/main/java/com/skydoves/powermenu/kotlin/ViewPowerMenuLazy.kt

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2017 skydoves
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.skydoves.powermenu.kotlin
+
+import android.content.Context
+import androidx.activity.ComponentActivity
+import com.skydoves.powermenu.PowerMenu
+import java.io.Serializable
+import kotlin.reflect.KClass
+
+/**
+ * An implementation of [Lazy] for creating an instance of the [PowerMenu] lazily in Activities.
+ * Tied to the given Activity's lifecycleOwner, [factory].
+ *
+ * @param context A context for creating resources of the [PowerMenu] lazily.
+ * This will prevents memory leak: [Avoid Memory Leak](https://github.com/skydoves/powermenu#avoid-memory-leak).
+ * @param factory A [PowerMenu.Factory] kotlin class for creating a new instance of the PowerMenu.
+ */
+@PublishedApi
+internal class ViewPowerMenuLazy<out T : PowerMenu.Factory>(
+  private val context: Context,
+  private val factory: KClass<T>
+) : Lazy<PowerMenu>, Serializable {
+
+  private var cached: PowerMenu? = null
+
+  override val value: PowerMenu
+    get() {
+      var instance = cached
+      if (instance === null) {
+        if (context is ComponentActivity) {
+          val factory = factory::java.get().newInstance()
+          instance = factory.create(context, context)
+          cached = instance
+        } else {
+          throw IllegalArgumentException(
+            "PowerMenu can not be initialized. The passed context is not an instance of the ComponentActivity."
+          )
+        }
+      }
+
+      return instance
+    }
+
+  override fun isInitialized(): Boolean = cached !== null
+
+  override fun toString(): String = if (isInitialized()) value.toString() else "Lazy value not initialized yet."
+}