java.lang.IllegalStateException: Fragment already added

问题描述

在DialogFragment中重复调用show(manager: FragmentManager?, tag: String?)导致崩溃，提示IllegalStateException: Fragment already added
并且manager?.findFragmentByTag(tag)找到的fragment是空，isAdded也是false

解决方案

方案一：

override fun show(manager: FragmentManager?, tag: String?) {try {//在每个add事务前增加一个remove事务，防止连续的addmanager?.beginTransaction()?.remove(this)?.commit()super.show(manager, tag)} catch (e: Exception) {//同一实例使用不同的tag会异常,这里捕获一下e.printStackTrace()}}

方案二：

override fun show(manager: FragmentManager?, tag: String?) {try {manager?.beginTransaction()?.commitAllowingStateLoss()manager?.executePendingTransactions()if (isAdded){return}super.show(manager, tag)}catch (e: Exception){e.printStackTrace()}}

总结

推荐方案二，方案一在同一实例使用不同的tag会异常

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java.lang.IllegalStateException: Fragment already added

问题描述

解决方案

总结

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