我,当我尝试打开一个对话框,得到以下的Android例外。是否有人可以帮助我了解是怎么回事,我该如何解决这个问题?
android.view.WindowManager $ BadTokenException:
无法添加窗口 - 令牌null不是一个应用程序
在android.view.ViewRoot.setView(ViewRoot.java:509)
在android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
在android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
在android.app.Dialog.show(Dialog.java:241)
解决方案
我猜 - 你想用的应用程序上下文中创建对话框?事情是这样的:
新的对话框(getApplicationContext());
这是错误的。您需要使用一个活动环境。
你必须尝试这样的:
新的对话框(YourActivity.this);
I get the following Android exception when I try to open a dialog. Can someone please help me understand what is going on and how can I fix this problem?
android.view.WindowManager$BadTokenException:
Unable to add window -- token null is not for an application
at android.view.ViewRoot.setView(ViewRoot.java:509)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
at android.app.Dialog.show(Dialog.java:241)
解决方案
I'm guessing - are you trying to create Dialog with an application context? Something like this:
new Dialog(getApplicationContext());
This is wrong. You need to use an Activity context.
You have to try like:
new Dialog(YourActivity.this);