Android application, simple voice analysis

The android application should go over a recorded message and make simple analysis. it should recognise the intervals in which there are words, and the times there is silent. it should give these intervals as output. - there will be only one speaker with almost no background noise - please state with what software will you write the analysis, and with what libraries - deliverables should include apk and all the files (including any libraries used in the project) with comments and run on android studio 1.1.0 - project should run on : --Samsung galaxy s3 GT-I9300 android version 4.3 --one plus one version 4.4.4