[Android] SeekBar event

import android.app.Activity;import android.os.Bundle;import android.widget.SeekBar;import android.widget.TextView; public class HelloSeekBar extends Activity implementsSeekBar.OnSeekBarChangeListener { SeekBar mSeekBar;TextView mProgressText;TextView mTrackingText; @Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);se..