今天弄项目时发现一个有趣的错误BUG，特来记载一下，初步定义为视图加载的问题，

错误信息先沾上来:

java.lang.RuntimeException: Unable to start activity ComponentInfo

java.lang.RuntimeException: Unable to start activity ComponentInfo

java.lang.RuntimeException: Unable to start activity ComponentInfo

android.view.WindowManager$BadTokenException: Unable to add window -- token android.app.LocalActivityManager$LocalActivityRecord@422dc6e8 is not valid; is your activity running?

at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:768)

Andrdoid用仿iphone的TabBar是用TabHost+ActivityGroup来解决的，里面用View堆栈的形式加载 Activity，在里面的Activity用AlertDialog对话框是，报异常：android.view.WindowManager$BadTokenException: Unable to add window -- token android.app.LocalActivityManager$LocalActivityRecord@422dc6e8 is not valid; is your activity running?

把AlertDialog里面的context：xxxActivity.this 改为：：“xxxActivity.this..getParent()”就搞定！