日期等选择器使用

mylibrary/src/main/java/com/dahe/mylibrary/base/SingletonHolder.kt

@@ -0,0 +1,48 @@
+package com.dahe.mylibrary.base
+
+import android.content.Context
+import kotlin.reflect.KFunction0
+
+/**
+ * @ClassName SingletonHolder
+ * @Author john
+ * @Date 2024/2/5 15:35
+ * @Description TODO
+ */
+open class SingletonHolder<out T, in A>(creator: (A) -> T) {
+
+    private var creator: ((A) -> T)? = creator
+
+    @Volatile
+    private var instance: T? = null
+
+    //对上述方法的一种更简洁的写法
+    fun getInstance(arg: A): T =
+        instance ?: synchronized(this) {
+            instance ?: creator!!(arg).apply {
+                instance = this
+            }
+        }
+}
+
+
+open class SingletonNoPHolder<out T>(creator: () -> T) {
+
+    private var creator: (() -> T)? = creator
+
+    @Volatile
+    private var instance: T? = null
+
+    //对上述方法的一种更简洁的写法
+    fun getInstance(): T =
+        instance ?: synchronized(this) {
+            instance ?: creator!!().apply {
+                instance = this
+            }
+        }
+}
+
+//使用
+//class SkinManager private constructor(context: Context) {
+//    companion object : SingletonHolder<SkinManager, Context>(::SkinManager)
+//}