Android问题集锦之五十 not attached to window manager

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not attached to window manager有许多场景发生，下面说下Dialog的dismiss引发的崩溃。

场景复现：

1、异步任务或其他后台线程操作，界面显示滚动条。
两个Tab页快速点击切换，有一定几率出现上述问题引起的崩溃。

java.lang.IllegalArgumentException: View not attached to window manager    at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:356)    at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:201)    at android.view.Window$LocalWindowManager.removeView(Window.java:400)    at android.app.Dialog.dismissDialog(Dialog.java:268)    at android.app.Dialog.access$000(Dialog.java:69)    at android.app.Dialog$1.run(Dialog.java:103)    at android.app.Dialog.dismiss(Dialog.java:252)    at xxx.onPostExecute(xxx$1.java:xxx)
   
   

    
    
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2、有些机型上就是会偶现这个问题，着实让人头疼。

解决方案

1、直接try catch，将崩溃阻止

 try {        if ((this.mDialog != null) && this.mDialog.isShowing()) {            this.mDialog.dismiss();        }    } catch (final IllegalArgumentException e) {        // Handle or log or ignore    } catch (final Exception e) {        // Handle or log or ignore    } finally {        this.mDialog = null;    }  
   
   

    
    
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虽然暴力，但只少不崩溃了。
2、判断创建该Dialog的上下文是否有效，在有效的情况才关闭Dialog。

public void hideProgress() {    if(mProgressDialog != null) {        if(mProgressDialog.isShowing()) { //check if dialog is showing.            //get the Context object that was used to great the dialog            Context context = ((ContextWrapper)mProgressDialog.getContext()).getBaseContext();            //if the Context used here was an activity AND it hasn't been finished or destroyed            //then dismiss it            if(context instanceof Activity) {                 if(!((Activity)context).isFinishing() && !((Activity)context).isDestroyed())                     mProgressDialog.dismiss();            } else //if the Context used wasnt an Activity, then dismiss it too                mProgressDialog.dismiss();        }        mProgressDialog = null;    }}
   
   

    
    
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下面简写的判断无效的方法：

private boolean isInvalidContext (){      return (isDestroyed() || isFinishing());    }  
   
   

    
    
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参考

1、http://stackoverflow.com/questions/2745061/java-lang-illegalargumentexception-view-not-attached-to-window-manager
2、http://blog.csdn.net/yuxiaohui78/article/details/38076447

           

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