android加载进度条

package xiaohang.zhimeng;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.ProgressBar;

public class Activity01 extends Activity {

//声明ProgressBar对象
private ProgressBar xh_ProgressBar;
private ProgressBar xh_ProgressBar2;
private Button xh_Button;
protected static final int GUI_STOP_NOTIFIER = 0x108;
protected static final int GUI_THREADING_NOTIFIER = 0x109;
public int intCounter = 0;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//设置窗口模式，因为需要显示进度条在标题栏
//  requestWindowFeature(Window.FEATURE_PROGRESS);
//  setProgressBarVisibility(true);
setContentView(R.layout.main);

//得到ProgressBar
xh_ProgressBar = (ProgressBar) findViewById(R.id.ProgressBar01);
xh_ProgressBar2 = (ProgressBar) findViewById(R.id.ProgressBar02);
xh_Button = (Button) findViewById(R.id.Button01);

//设置进度条 不为 不确定模式
xh_ProgressBar.setIndeterminate(false);
xh_ProgressBar2.setIndeterminate(false);

//当按钮按下时开始执行
xh_Button.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
//设置ProgressBar为可见状态
xh_ProgressBar.setVisibility(View.VISIBLE);
xh_ProgressBar2.setVisibility(View.VISIBLE);
//设置ProgressBar的最大值
xh_ProgressBar.setMax(100);
//设置ProgressBar当前值
xh_ProgressBar.setProgress(0);
xh_ProgressBar2.setProgress(0);

//通过线程来改变ProgressBar的值
new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i < 10; i++) {
try {
//设置进度值
intCounter = (i + 1) * 20;
//睡眠1000毫秒
Thread.sleep(1000);

if (i == 4) {
Message m = new Message();

m.what = Activity01.GUI_STOP_NOTIFIER;
Activity01.this.myMessageHandler
.sendMessage(m);
break;
} else {
Message m = new Message();
m.what = Activity01.GUI_THREADING_NOTIFIER;
Activity01.this.myMessageHandler
.sendMessage(m);
}

} catch (Exception e) {
e.printStackTrace();
}
}
}

}).start();
}

});
}

Handler myMessageHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
//ProgressBar已经是最大值
case Activity01.GUI_STOP_NOTIFIER:
xh_ProgressBar.setVisibility(View.GONE);
xh_ProgressBar2.setVisibility(View.GONE);
Thread.currentThread().interrupted();
break;
case Activity01.GUI_THREADING_NOTIFIER:
if (!Thread.currentThread().isInterrupted()) {