xml：

ProgressbarActivity.java

package com.progress;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;

public class ProgressbarActivity extends Activity {
private ProgressBar firstBar = null;
private ProgressBar secondBar = null;
private Button myButton = null;
private int i = 0;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

firstBar = (ProgressBar) findViewById(R.id.firstBar);
secondBar = (ProgressBar) findViewById(R.id.secondBar);
myButton = (Button) findViewById(R.id.myButton);
myButton.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if( i == 0 ){
firstBar.setVisibility(View.VISIBLE);//可见的状态。值为0(不用v而用view。 android.view.view)
firstBar.setMax(150);//设置最大值
secondBar.setVisibility(View.VISIBLE);
}else if( i < firstBar.getMax() ){
//设置主进度条的当前值
firstBar.setProgress(i);
//设置第二进度条的当前值
firstBar.setSecondaryProgress(i + 10 );//默认最大宽度是100，则是前进1/10。如果设置的是200.则前进的是1/20
//secondBar.setProgress(i);
}else{
firstBar.setVisibility(View.GONE);//不可见的状态
secondBar.setVisibility(View.GONE);
}
i = i + 10;
}
});
System.out.println(firstBar.getMax());
}
}