android.media.ToneGenerator provides methods to play DTMF tones (ITU-T Recommendation Q.23), telephone telephone supervisory tones (3GPP TS 22.001, CEPT) as well as […]

Example to generate DTMF tones using ToneGenerator. MainActivity.java package com.example.androiddtmfpiano; import android.support.v7.app.ActionBarActivity; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; […]