在service中通过在oncreat（）中开启一个线程，轮训ArrayList<AttachmentTask> 我这个附件下载的任务list ，ArrayList<AttachmentTask> 他维护的是一个当前下载的任务，每当下载完一个移除一个，同时下载完后添加到数据库。
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/* * @project C6Client * @package com.jh.c6.service * @file DownloadService.java * @version 1.0 * @author liaoyp * @time 2012-5-17 上午2:55:19 */package
com.jh.c6.service;import
java.io.File;import
java.io.FileNotFoundException;import
java.io.FileOutputStream;import
java.io.IOException;import
java.io.InputStream;import
java.net.URL;import
java.net.URLConnection;import
java.util.ArrayList;import
java.util.List;import
android.app.Notification;import
android.app.NotificationManager;import
android.app.PendingIntent;import
android.app.Service;import
android.content.Intent;import
android.os.Handler;import
android.os.IBinder;import
android.widget.Toast;import
com.jh.c6.activity.C6ClientActivity;import
com.jh.c6.activity.DownloadMangerActivity;import
com.jh.c6.activity.R;import
com.jh.c6.entity.AttachmentTask;import
com.jh.c6.exception.POAException;import
com.jh.c6.impl.DownloadDB;import
com.jh.c6.util.Configure;public
class DownloadService extends
Service implements
Runnable{ private
NotificationManager manager; private
Notification notif; private
Intent intent; Handler handler =
new Handler(){ public
void handleMessage(android.os.Message msg) { if(msg.what ==
1){ Toast.makeText(getApplicationContext(),
"该附件已下载",
500).show(); startActivity(); }else
if(msg.what ==
2){ startActivity(); Toast.makeText(getApplicationContext(),
"该附件正在下载",
500).show(); }else
if(msg.what ==
3){// startActivity(); Toast.makeText(getApplicationContext(),
"服务器不存在该附件！",
500).show(); }else{ manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); Notification notification =
new Notification(R.drawable.ic_launcher,"附件下载中",System.currentTimeMillis()); intent =
new Intent(); intent.setClass(getApplicationContext(), DownloadMangerActivity.class); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP| Intent.FLAG_ACTIVITY_NEW_TASK); PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 100, intent, PendingIntent.FLAG_UPDATE_CURRENT); notification.setLatestEventInfo(getApplicationContext(),
"附件下载", "下载完成！", pendingIntent); manager.notify(101, notification); Toast.makeText(getApplicationContext(),
"下载完成", 500).show(); } }; }; //static LinkedList<AttachmentTask> attsTask = new LinkedList<AttachmentTask>(); public
static ArrayList<AttachmentTask> attsTask =
new ArrayList<AttachmentTask>(); public
void startActivity(){ intent =
new Intent(); intent.setClass(getApplicationContext(), DownloadMangerActivity.class); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP| Intent.FLAG_ACTIVITY_NEW_TASK); DownloadService.this.startActivity(intent); } public
boolean isRun; public
final static
int Max = 4; public
static boolean
stopDownload; static
final Object NO_MORE_WORK =
new Object(); private
Thread t; private
DownloadDB downloadDB; private
Intent download; private
File file; @Override public
IBinder onBind(Intent intent) { return
null; } /** * 最大限制 * @return */ public
static boolean
IsMaxNum (){ return
attsTask.size()>=Max? true:false; } /** * 任务列表中是否存在还任务 * @param path * @return */ public
static boolean
isDownLoading(String path){ for
(int
i = 0; i < attsTask.size(); i++) { if(attsTask.get(i).getUri().equals(path)){ return
true; } } return
false; } /** *
* <code>getTask</code> * @description: TODO(获取附件总数)
* @return * @since 2012-4-18 liaoyp */ public
static int
getTask(){ if(UploadService.attsTask !=null) return
attsTask.size(); else return
0; } /** * 是否下载完成！ * @return */ public
static boolean
isDowloadFinshed(){ for
(int
i = 0; i < attsTask.size(); i++) { if(!attsTask.get(i).isOver()){ return
false; } } return
true; } /** * 服务器地址 * @return */ public
static List<String> getDownloadServerPath(){ List<String> atts =
null; if(attsTask !=null
&& attsTask.size()>0){ atts =
new ArrayList<String>(); for
(int
i = 0; i < attsTask.size(); i++) { if(attsTask.get(i).isOver()){ atts.add(attsTask.get(i).getServerPath()); } } return
atts; } return
atts; } @Override public
void onCreate() { super.onCreate(); isRun=
true; t =
new Thread(this); t.start(); } @Override public
void onStart(Intent intent,
int startId) { // TODO Auto-generated method stub super.onStart(intent, startId); if(intent !=null
&&intent.getExtras() !=null){ if(t ==
null){ t =
new Thread(this); t.start(); } String uri = (String) intent.getExtras().get("uri"); if(uri !=null){ for
(int
i = attsTask.size() -1; i >=
0; i--) { if(attsTask.get(i).getUri().equals(uri)){ stopDownload =
true; attsTask.remove(i); System.out.println("cancle ---->"+attsTask.size()); this.sendBroadcast(new
Intent(C6ClientActivity.updateDowload)); } } } } } @Override public
int onStartCommand(Intent intent,
int flags,
int startId) { return
super.onStartCommand(intent, flags, startId); } @Override public
void run() { while(isRun) { try
{ if
(attsTask.size() > 0) { for
(int
i = 0; i <attsTask.size(); i++) { AttachmentTask task = attsTask.get(i); if(! task.isUnSart()){ download(attsTask.get(i)); } } }
else
{ try
{ Thread.sleep(500); }
catch (Exception e) { } } }catch(Exception e){ System.out.println("error-----------------"+e); } } } private
void download(AttachmentTask task)
throws POAException { // TODO Auto-generated method stub // 开始上传 和 更新下载的进度显示 System.out.println("dowenload-----------------1"); task.setUnSart(true); task.setSarting(true); if(downloadDB ==
null){ downloadDB =
new DownloadDB(); } String httpPath ; httpPath = task.getUri(); String loacalPath = downloadDB.getLocalpicPath(DownloadService.this, httpPath); System.out.println("localPath : "+loacalPath); if(loacalPath ==
null){ boolean
b = isDownLoading(httpPath); if(b){ // 发送广播通知 removeTask(task); handler.sendEmptyMessage(2); }else{ // 下载 startDowload(task); }// Toast.makeText(getApplicationContext(), "开始下载", 500).show(); startDowload(task); }else{ File file =
new File(loacalPath); if( ! file.exists()){ // 下载 startDowload(task); }else{ // 跳到附件管理界面 removeTask(task); handler.sendEmptyMessage(1); } } } public
void startDowload(AttachmentTask task){ InputStream is =
null; FileOutputStream fos =
null; String httpPath =
""; try
{ httpPath = (Configure.IPADDRESS.replaceAll("POSTServiceForAndroid.svc",
"")+"FileOutSteam.aspx?FileID="+ task.getUri()); System.out.println("http: "+httpPath); URLConnection connetion =
new URL(httpPath).openConnection(); is=connetion.getInputStream();// HttpGet httpGet = new HttpGet(task.getUri());// HttpClient client = new DefaultHttpClient();// HttpParams httpParams = client.getParams();// HttpConnectionParams.setConnectionTimeout(httpParams,5000);// HttpConnectionParams.setSoTimeout(httpParams, 10000);// HttpResponse httpResponse = client.execute(httpGet);// if (httpResponse.getStatusLine().getStatusCode() == 200) {//// is = httpResponse.getEntity().getContent(); // 开始下载apk文件 String path = Configure.DATADIR+Configure.DownloadFile +
"/"+task.getServerPath(); file =
new File(path); if( ! file.exists()){ file.createNewFile(); } fos =
new FileOutputStream(file); byte[] buffer =
new byte[2048]; int
count = 0; while
((count = is.read(buffer)) != -1) { if
(stopDownload) { break
; } fos.write(buffer,
0, count); // 进行进度跟新 long
current= task.getCurrentProgress(); current =task.getCurrentProgress() +count; task.setCurrentProgress(current); // send broadCast to mangeAttachmengActivity download =
new Intent(C6ClientActivity.DowloadAction); download.putExtra("type",
0); this.sendBroadcast(download); System.out.println("下载中......"); } fos.flush(); removeTask(task); if(downloadDB !=
null){ downloadDB.insertPic(DownloadService.this, task.getUri(),path, Configure.ACCOUNTID); }else{ new
DownloadDB().insertPic(DownloadService.this, task.getUri(),path, Configure.ACCOUNTID); } // 提示下载完成 ！// download = new Intent(C6ClientActivity.DowloadAction);// download.putExtra("type", 1);// this.sendBroadcast(download); handler.sendEmptyMessage(0); }catch
(FileNotFoundException e) { e.printStackTrace(); handler.sendEmptyMessage(3); }catch
(IOException e) { e.printStackTrace(); }
finally{ try
{ if
(fos != null) { fos.close(); } }
catch (IOException e) { e.printStackTrace(); } try
{ if
(is != null) { is.close(); } }
catch (IOException e) { e.printStackTrace(); } } } public
static void
removeTask(AttachmentTask task){ if(attsTask.contains(task)){ attsTask.remove(task); } } public
static void
addTask(AttachmentTask task){ stopDownload =
false; attsTask.add(task); } @Override public
void onDestroy() { super.onDestroy(); isRun =
false; } } |