当Activity已经Finish了，还弹对话框的话，就会报这个错

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·        1Caused by: android.view.WindowManager$BadTokenException:Unable to add window -- token android.os.BinderProxy@42b22048 is not valid; isyour activity running?

·        2    atandroid.view.ViewRootImpl.setView(ViewRootImpl.java:541)

·        3    atandroid.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:259)

·        4    atandroid.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)

·        5    at android.app.Dialog.show(Dialog.java:286)

·        6    atcom.mama100.android.member.wxapi.WXPayHelper.showWXPayFailedDialog(WXPayHelper.java:88)

·        7    atcom.mama100.android.member.activities.mothershop.SubmitOrderActivity$3.onCheckStatusResponse(SubmitOrderActivity.java:941)

·        8    atcom.mama100.android.member.wxapi.CheckWXPayStatus$TaskCheckWXPayStatus.handleResponse(CheckWXPayStatus.java:55)

·        9    atcom.mama100.android.member.activities.AsyncReqTask.onPostExecute(AsyncReqTask.java:50)

·        10    at com.mama100.android.member.activities.AsyncReqTask.onPostExecute(AsyncReqTask.java:1)

解决办法 ：

在dialog初始化前先加判断

       if (mContext.isFinishing()) {

           return;

                    }

网页名称：Bug2:Activity已经finish了，还调Dialog
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