[Android] dialog background learning abbreviated using the loading components MaterialLoadingProgressBar can not be set transparent

[Project] addresses https://github.com/lsjwzh/MaterialLoadingProgressBar

[Problem] would have been good to use with, why the sudden loading box background to black out?

[Solution] checked, including wrongly quoted "AlertDialog.Builder" point went in and saw not support.v7 used, change came on the line.

private AlertDialog.Builder builder=null;
    private AlertDialog dialog=null;

correct:

private android.support.v7.app.AlertDialog.Builder builder=null;