Android - Make camera preview semi-transparent -

Android - Make camera preview semi-transparent -

i want create photographic camera preview see through. saw next post:

how create surfaceview transparent

about making surface view transparent problem extending surface view more command on photographic camera , extending surface view create solution invalid , don't explain why/propose solution.

what can accomplish this?

edit:

yes, have tried in linked post.

this want accomplish

top ================================= semi-transparent photographic camera preview [fullscreen] ================================= images , text ================================= bottom

place view on preview view , create view semi-transparent. create view semi-transparent have give alpha value color background ex:

<view android:background=#88000000/>

android android-camera transparency surfaceview