Service下载apk通过notification显示下载进度

package com.ljp.download.service; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.util.HashMap; import java.util.Map; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Intent; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.ProgressBar; import android.widget.RemoteViews; import android.widget.TextView; import android.widget.Toast; import com.ljp.download.ServiceDownLoadActivity; import com.ljp.version.R; public class DownloadService extends Service { private NotificationManager notificationMrg; private String apkurl1="http://c.uzzf.com//ddl/anzhuozhinenguanjia.apk"; private String apkurl2="http://file.liqucn.com/upload/2011/liaotian/Youni_3.4.1.3.apk"; private String apkurl3="http://gdown.baidu.com/data/wisegame/77dae776f870e572/PPTVjuli_61.apk"; private String apkurl4="http://file-bak.liqucn.com/upload/2011/gouwu/cn.etouch.taoyouhui_3.1.3_liqucn.com.apk"; private Map<String,Notification> notificationCache = new HashMap<String,Notification>(); private Holder holder; int flag=0; public void onCreate() { super.onCreate(); notificationMrg = (NotificationManager) this.getSystemService(android.content.Context.NOTIFICATION_SERVICE); } @Override public int onStartCommand(Intent intent, int flags, int startId) { super.onStartCommand(intent, flags, startId); System.out.println("Get intent:" + intent); final String url = intent.getStringExtra("url"); // 注:此处url必须声明为final常量，否则是不会被子线程中读取到的 System.out.println("Get url from intent:" + url); Runnable start = new Runnable() { public void run() { loadFile(url,++flag); } }; new Thread(start ){ }.start(); return START_REDELIVER_INTENT; } @Override public void onDestroy() { super.onDestroy(); } // 状态栏视图更新 private Notification displayNotificationMessage(Notification notification,int count,int flag,String url) { RemoteViews contentView1 =notification.contentView; Log.i("TAG","updata flag=="+flag); Log.i("TAG","updata count=="+count); if(url.equals(apkurl1)) contentView1.setTextViewText(R.id.n_title,"安卓智能管家"); if(url.equals(apkurl2)) contentView1.setTextViewText(R.id.n_title,"有你短信"); if(url.equals(apkurl3)) contentView1.setTextViewText(R.id.n_title,"pptv"); if(url.equals(apkurl4)) contentView1.setTextViewText(R.id.n_title,"随手优惠"); contentView1.setTextViewText(R.id.n_text, "当前进度："+count+"% "); contentView1.setProgressBar(R.id.n_progress, 100, count, false); notification.contentView = contentView1; // 提交一个通知在状态栏中显示。如果拥有相同标签和相同id的通知已经被提交而且没有被移除，该方法会用更新的信息来替换之前的通知。 notificationMrg.notify(flag, notification); return notification; } @Override public IBinder onBind(Intent intent) { // TODO Auto-generated method stub return null; } public void loadFile(String url,int flag) { Intent notificationIntent = new Intent(getApplicationContext(), this.getClass()); notificationIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); // addflag设置跳转类型 PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 0,notificationIntent, 0); // 创建Notifcation对象，设置图标，提示文字 long number = 100; Notification notification = new Notification(R.drawable.ic_launcher,"DnwoLoadManager",number);// 设定Notification出现时的声音，一般不建议自定义 System.currentTimeMillis() notification.flags |= Notification.FLAG_ONGOING_EVENT;//出现在 “正在运行的”栏目下面 RemoteViews contentView1 = new RemoteViews(getPackageName(),R.layout.notification_version); contentView1.setTextViewText(R.id.n_title,"准备下载"); contentView1.setTextViewText(R.id.n_text, "当前进度："+0+"% "); contentView1.setProgressBar(R.id.n_progress, 100, 0, false); notification.contentView = contentView1; notification.contentIntent = contentIntent; double m= 0.0; HttpClient client = new DefaultHttpClient(); HttpGet get = new HttpGet(url); HttpResponse response; try { response = client.execute(get); HttpEntity entity = response.getEntity(); double length = entity.getContentLength(); InputStream is = entity.getContent(); // 使用InputStream对文件进行读取，就是字节流的输入 FileOutputStream fileOutputStream = null; File file = null; if (is != null){ // file = new File(Environment.getExternalStorageDirectory(),url); if(url.equals(apkurl1)){ file = new File(Environment.getExternalStorageDirectory(),"zhinengguanjia.apk");} if(url.equals(apkurl2)){ file = new File(Environment.getExternalStorageDirectory(),"youniduanxin.apk");} if(url.equals(apkurl3)){ file = new File(Environment.getExternalStorageDirectory(),"PPTVshiping.apk");} if(url.equals(apkurl4)){ file = new File(Environment.getExternalStorageDirectory(),"suishouyouhui.apk");} fileOutputStream = new FileOutputStream(file); byte[] buf = new byte[1024]; int ch = -1; float count = 0; // ch中存放从buf字节数组中读取到的字节个数 while ((ch = is.read(buf)) != -1) { fileOutputStream.write(buf, 0, ch); count += ch; // 从字节数组读取数据read(buf)后，返回，读取的个数，count中保存，已下载的数据字节数 double temp=count/length; if(temp>=m){ Log.i("TAG", "读取字节循环中的count"+temp); m+=0.1; int load=(int) ( count*100/length); sendMsg(1,load,url,notification,flag,null);} // 函数调用handler发送信息 } } // 文件输出流为空，则表示下载完成，安装apk文件 Uri Url=Uri.fromFile(file); Log.i("TAG", "下载完成，传递文件位置Url "+Url); sendMsg(2,0,url,notification,0,Url); fileOutputStream.flush(); if (fileOutputStream != null) { fileOutputStream.close(); } } catch (Exception e) { sendMsg(-1,0,url,notification,0,null); } } private void sendMsg(int what,int c,String url,Notification notification,int flag,Uri uri) { Message msg = new Message(); msg.what= what;//用来识别发送消息的类型 msg.arg1=0; holder=new Holder(); holder.count=c; holder.url=url; holder.flag=flag; holder.notify=notification; holder.Uri=uri; msg.obj=holder;//消息传递的自定义对象信息 handler.sendMessage(msg); } // 定义一个Handler，用于处理下载线程与主线程间通讯 private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { final Holder data=(Holder) msg.obj; if (!Thread.currentThread().isInterrupted()) { // 判断下载线程是否中断 switch (msg.what) { case 1: Log.i("TAG", "handlemessage中的 case 1: data.count "+data.count); Log.i("TAG", "handlemessage中的 case 1: flag "+data.flag); if(data.count>=99){ notificationMrg.cancel(data.flag); break; } Notification notification; if(notifi