<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:background="#00000000"    android:orientation="vertical"     android:padding="5dp">    <ImageView         android:id="@+id/content_view_image"        android:layout_width="25dp"        android:layout_height="25dp"        android:src="@drawable/logo"                />    <TextView        android:id="@+id/content_view_text1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="0%"        android:textColor="#000000"        android:layout_toRightOf="@id/content_view_image"        android:layout_centerHorizontal="true"        android:layout_marginTop="5dp"        android:layout_marginLeft="15dp"      />    <ProgressBar         android:id="@+id/content_view_progress"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        style="@android:style/Widget.ProgressBar.Horizontal"        android:max="100"        android:layout_below="@id/content_view_image"        android:layout_marginTop="4dp"        />    </RelativeLayout>

package yyy.testandroid4;import java.util.Timer;import java.util.TimerTask;import android.app.Activity;import android.app.AlertDialog.Builder;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.DialogInterface;import android.content.Intent;import android.content.pm.PackageManager.NameNotFoundException;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.RemoteViews;import android.widget.Toast;public class TestAndroid4Activity extends Activity {            private Handler handler = new Handler(){        @Override        public void handleMessage(Message msg) {            // TODO Auto-generated method stub            super.handleMessage(msg);            switch (msg.what) {            case 0:                notif.contentView.setTextViewText(R.id.content_view_text1, len+"%");                notif.contentView.setProgressBar(R.id.content_view_progress, 100, len, false);                manager.notify(0, notif);                                break;            case 1:                Toast.makeText(TestAndroid4Activity.this, "下载完成", 0).show();                break;            default:                break;            }        }            };        private Button update,cancel;    private int localVersion,serverVersion;    private int len;    private NotificationManager manager;    private Notification notif;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                update = (Button) findViewById(R.id.update);              update.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View arg0) {                // TODO Auto-generated method stub                //点击通知栏后打开的activity                Intent intent = new Intent(TestAndroid4Activity.this,OtherActivity.class);                                PendingIntent pIntent = PendingIntent.getActivity(TestAndroid4Activity.this, 0, intent, 0);                     manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);                notif = new Notification();                notif.icon = R.drawable.logo;                notif.tickerText = "新通知";                //通知栏显示所用到的布局文件                notif.contentView = new RemoteViews(getPackageName(), R.layout.content_view);                notif.contentIntent = pIntent;                manager.notify(0, notif);                new DownLoadThread().start();            }        });                           }  }        private class DownLoadThread extends Thread{        private Timer timer = new Timer();        @Override        public void run() {            // TODO Auto-generated method stub            super.run();            timer.schedule(new TimerTask() {                @Override                public void run() {                    // TODO Auto-generated method stub                                        Message msg = new Message();                    msg.what = 0;                    msg.obj = len;                    handler.sendMessage(msg);                                        if(len == 100){                        timer.cancel();                        handler.sendEmptyMessage(1);                    }                                }            }, 0, 1000);            len = 0;            try {                while(len < 100){                    len++;                    Thread.sleep(1000);                }            } catch (InterruptedException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }            }        }