seekbar.xml:

package com.example.baseexample;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ProgressBar;import android.widget.SeekBar;public class ProgressBarActivity extends Activity {		private SeekBar seekBar;	private ProgressBar firstBar;	private ProgressBar secondBar;	private Button bt_Begin;	private int i=0;		public void onCreate(Bundle savedInstanceState){		super.onCreate(savedInstanceState);		setContentView(R.layout.seekbar);				seekBar= (SeekBar)findViewById(R.id.seekBar);		firstBar = (ProgressBar)findViewById(R.id.firstBar);		secondBar = (ProgressBar)findViewById(R.id.secondBar);		bt_Begin = (Button)findViewById(R.id.bt_Begn);				bt_Begin.setOnClickListener(new Button.OnClickListener(){			@Override			public void onClick(View v) {				if(i==0){					firstBar.setVisibility(View.VISIBLE);					secondBar.setVisibility(View.VISIBLE);				}else if(i<=100){					firstBar.setProgress(i);					firstBar.setSecondaryProgress(i+10);					secondBar.setProgress(i);				}				i=i+10;				seekBar.setProgress(i);							}					});			}}