片段已经添加，对话框片段？

Question

我有一个显示良好的对话框片段，但有时当我尝试显示它时，我不断收到 IllegalStateException

下面是logcat

java.lang.IllegalStateException: Fragment already added: SelectPlan04Dialog{fa768dc #7 }
    at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1893)
    at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:760)
    at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2595)
    at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2382)
    at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2337)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2244)
    at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:702)
    at android.os.Handler.handleCallback(Handler.java:790)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:192)
    at android.app.ActivityThread.main(ActivityThread.java:6679)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:826)]

这是我如何调用对话框的代码

if (selectPlan04Dialog == null) {
    selectPlan04Dialog = new SelectPlan04Dialog();
}
if (!selectPlan04Dialog.isVisible() && !selectPlan04Dialog.isAdded()) {
    Bundle b = new Bundle();
    b.putSerializable("moduleApi", module);
    selectPlan04Dialog.setArguments(b);                
    selectPlan04Dialog.show(getCurrentActivity().getSupportFragmentManager(), "");
}

Answer 1

片段事务是异步的。

在执行片段事务之前，您可能有两次或多次调用此代码。!selectPlan04Dialog.isVisible() & !selectPlan04Dialog.isAdded()条件为真并show()安排另一个片段事务稍后执行。

解决此问题的一些选项：

• 每次都创建一个新对话框，不要尝试重复使用旧对话框
• 通过调用片段管理器将异步片段事务更改为同步 executePendingTransactions()

Answer 2

 modalBottomSheet.show(supportFragmentManager.beginTransaction().remove(modalBottomSheet),ModalBottomSheet.TAG)\n

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\xd0\xa1都是这样的

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