android - Dialog themed activity : postive and negative buttons -

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i'm trying theme activity alertdialog. problem i'm facing can't find way put 2 buttons on bottom of window positive , negative buttons of alertdialog

i've added line activity in manifest (i'm using sherlock library): 

android:theme="@style/theme.sherlock.dialog"

and activity looking dialog, can't find theme set on buttons. have idea of ?

alright, if you're developping application hc/ics, without sherlock, answer here : https://gist.github.com/2348305

just theme using 

style="?android:attr/buttonbarstyle"

for container,

style="?android:attr/buttonbarbuttonstyle"

for buttons

and 

android:divider="?android:attr/dividerhorizontal" android:showdividers="middle"

for root layout


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