主程序文件
[java]
package com.example.myprogressbar;

import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.ProgressBar;

public class MainActivity extends Activity {
static int progress;
ProgressBar progressBar;
int progressStatus = 0;
Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

progress = 0;
progressBar = (ProgressBar) findViewById(R.id.progressbar);
progressBar.setMax(200);

new Thread(new Runnable() {

@Override
public void run() {
// TODO Auto-generated method stub
while(progressStatus < 100){
progressStatus = doSomeWork();

handler.post(new Runnable() {

@Override
public void run() {
// TODO Auto-generated method stub
progressBar.setProgress(progressStatus);
}
});
}

handler.post(new Runnable() {

@Override
public void run() {
// TODO Auto-generated method stub
progressBar.setVisibility(View.GONE);
}
});
}

private int doSomeWork(){
try{
Thread.sleep(500);
} catch(InterruptedException e) {
e.printStackTrace();
}
return ++progress;
}
}).start();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}
[/java]
布局文件
[xml]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<ProgressBar android:id="@+id/progressbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="@android:style/Widget.ProgressBar.Horizontal" />

</LinearLayout>
[/xml]