DTMF Tone Generator

package com.android.ToneGen;

import android.app.Activity;
import android.media.AudioManager;
import android.media.ToneGenerator;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class ToneGen extends Activity {
ToneGenerator tone;
Button btnSend;
EditText editTone;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        tone = new ToneGenerator(AudioManager.STREAM_DTMF, 100);
        btnSend=(Button)findViewById(R.id.btnSend);
        editTone= (EditText)findViewById(R.id.editTone);
       
        btnSend.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
int no=Integer.parseInt(editTone.getText().toString());
tone.startTone(no,2000);



}
});
       
    }
}