Dialog最好不要判断是否为空， 每次都直接new

异常：

android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@42fe4230 is not valid; is your activity running?

10-08 18:57:07.696: E/AndroidRuntime(16021): at android.view.ViewRootImpl.setView(ViewRootImpl.java:736)

10-08 18:57:07.696: E/AndroidRuntime(16021): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:248)

10-08 18:57:07.696: E/AndroidRuntime(16021): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:74)

10-08 18:57:07.696: E/AndroidRuntime(16021): at android.app.Dialog.show(Dialog.java:322)

 

代码：

if（mDialog != null）{

   mDialog = new Dialog(mMainActivity, XXXXXX);

}

mDialog.show();

 

去掉判断，每次都重新new就OK了