进度条ProgressBar

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="ProgressBar Test"
    />

<ProgressBar android:id="@+id/firstBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:max="100"
android:visibility="gone"
/>

<ProgressBar android:id="@+id/secondBar"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
/>

<Button android:id="@+id/start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="启动"
/>
</LinearLayout>

package com.demo;

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 Activity1 extends Activity {
	
	private ProgressBar firstBar;
	private ProgressBar secondBar;
	private Button start;
	private int i=0;
	
	//取得Views
	private void findViews(){
		firstBar = (ProgressBar) findViewById(R.id.firstBar);
		secondBar = (ProgressBar) findViewById(R.id.secondBar);
		start = (Button) findViewById(R.id.start);
	}
	
	//设置监听
	private void setListener(){
		start.setOnClickListener(new OnClickListener() {			
			@Override
			public void onClick(View v) {
				 if(i == 0){
					 //可见 
					 firstBar.setVisibility(View.VISIBLE);
					 secondBar.setVisibility(View.VISIBLE);
				 }else if(i < firstBar.getMax()){
					 //设置进度
					 firstBar.setProgress(i);
					 firstBar.setSecondaryProgress(i+10);
	
				 }else{
					 //不可铜陵
					 firstBar.setVisibility(View.GONE);
					 secondBar.setVisibility(View.GONE);
				 }	
				 i = i + 10;
			}
		});
	}
	
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        findViews();
        setListener();
    }
}