Android's floating windows coupled with FLAG

My app, shows a dialog box to the user before the lock screen. It's a simple Activity that contains DialogFragments (from the support library as this app runs on 2.2+).

Since the actual activity that displayed those dialogs was not a floating window by Android's standards,

getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);

worked fine.

However, I was thinking I'd use an Activity that looks like a Dialog instead. All the Dialog themes (Holo, etc), though, have this item:

<item name="android:windowIsFloating">true</item>

This, for some reason causes the window flag to be completely ignored. Interestingly, the Activity gets shown after the user unlocks the screen.

Why would this be so, and is there a way around it?

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Suffering from the same issue. The only thing that seems to work in this issue is

KeyguardManager  myKeyGuard = (KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE);
myLock = myKeyGuard.newKeyguardLock("tagName");
myLock.disableKeyguard(); 

Dont forget to use the keyguard permission in manifest:

<uses-permission android:name = "android.permission.DISABLE_KEYGUARD"/>

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