Android API 19 support AlertDialog black border instead of shadow -

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android 5.1 renders dialog correctly, kitkat 4.4.4 , below show black border instead of shadow.

it seems android:windowbackground responsible that. have tried different drawables background, tried genymotion , android sdk emulators, tried older support libraries without success. did not set styles dialog. shown fragment.

the error see in logcat - eglsurfaceattrib not implemented

alertdialog black border

the border, round corners , margin defined android:windowbackground.

try add below line java file:

dialog.getwindow().setbackgrounddrawableresource(android.r.color.transparent);

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