android进度条TitleProgressBar

package com.example.titleprogressbar;

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

public class MainActivity extends Activity
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        //设置窗口特征：启用显示进度的进度条
        requestWindowFeature(Window.FEATURE_PROGRESS);
        //设置窗口特征：启用不显示进度的进度条
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        setContentView(R.layout.activity_main);
        Button bn1 = (Button)findViewById(R.id.bn01);
        Button bn2 = (Button)findViewById(R.id.bn02);
        bn1.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View source)
            {
                //显示不带进度的进度条。
                setProgressBarIndeterminateVisibility(true);
                //显示带进度的进度条。
                setProgressBarVisibility(true);
                //设置进度条的进度
                setProgress(4500);    
                
            }
        });
        bn2.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View source)
            {
                //隐藏不带进度的进度条。
                setProgressBarIndeterminateVisibility(false);
                //隐藏带进度的进度条。
                setProgressBarVisibility(false);
            }
        });    
    }
}