【原】Android多任务下载，使用Notification更新进度条

使用Notification更新多任务下载进度。大牛请绕路！！！

在网上真心没找到实现这样的代码，工作需要，只能苦X 自己实现了。

转载请注明：http://cn23snyga.iteye.com/blog/1902071

如图：

启动页面NotificationActivity06：（从这文件名，就可以看出我苦X 了多少个版本）

package com.example.notification06;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.view.View;import com.example.services.DownloadServices;public class NotificationActivity06 extends Activity{private Context mContext = NotificationActivity06.this;@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}public void downloadNP(View view){startDownloadService(0, "http://61.50.254.57:8088/nature-person/mobilenature/download/NaturalSaler_common.apk");}public void downloadYUN(View view){startDownloadService(1, "http://mix.911860.com/resources/apkupdate/7/common/mix-common.apk");}public void downloadTNews(View view){startDownloadService(2, "http://mix.911860.com/resources/mix/custom-apks/01-TencentNews/TencentNews.apk");}public void startDownloadService(int notifyId, String url){Intent i = new Intent(mContext, DownloadServices.class);i.putExtra("url", url);i.putExtra("notifyId", notifyId);mContext.startService(i);}}

其中的下载链接，换成自己需要的就好了。

下载服务DownloadServices：

package com.example.services;import java.io.File;import java.util.HashMap;import java.util.Map;import java.util.Timer;import java.util.TimerTask;import android.app.Notification;import android.app.NotificationManager;import android.app.Service;import android.content.Context;import android.content.Intent;import android.os.Handler;import android.os.IBinder;import android.os.Message;import android.widget.Toast;import com.example.bean.DownloadTask;import com.example.bean.NotificationBean;import com.example.notification06.R;import com.example.utils.DownloadUtil;import com.example.utils.DownloadUtil.IOnDownloadListener;public class DownloadServices extends Service{private Context mContext = DownloadServices.this;/** 正在下载 */private final int DOWN_LOADING = 0;/** 下载完成 */private final int DOWN_COMPLETE = 1;/** 下载失败 */private final int DOWN_ERR = 2;/** Timer 执行时间间隔 */private final int TIMER_PERIOD = 1500;protected Timer mTimer;protected NotificationManager mNotificationManager;/** 下载任务管理 */protected Map<String, DownloadTask> map_downloadtask;@Overridepublic IBinder onBind(Intent intent){return null;}@Overridepublic void onDestroy(){super.onDestroy();}@Overridepublic void onCreate(){// TODO Auto-generated method stubsuper.onCreate();mTimer = new Timer();mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);map_downloadtask = new HashMap<String, DownloadTask>();}@Overridepublic int onStartCommand(Intent intent, int flags, int startId){String mUrl = intent.getExtras().getString("url");int mNotifyId = intent.getExtras().getInt("notifyId");Notification mNotification = new NotificationBean(this, R.drawable.ic_launcher, "开始下载", System.currentTimeMillis());System.out.println("NotifyId = " + mNotifyId);if(map_downloadtask.containsKey(mUrl)){Toast.makeText(mContext, "已存在此下载任务", Toast.LENGTH_SHORT).show();}else{DownloadTask mDownloadTask = new DownloadTask();mDownloadTask.setUrl(mUrl);mDownloadTask.setNotifyID(mNotifyId);mDownloadTask.setNotification(mNotification);map_downloadtask.put(mUrl, mDownloadTask);Runnable mRunnable = new MyRunnable(mDownloadTask);new Thread(mRunnable).start();}return super.onStartCommand(intent, flags, startId);}class MyRunnable implements Runnable{private DownloadUtil mDownUtil = new DownloadUtil();private DownloadTask mDownTask;private Handler mHandler;private TimerTask mTimerTask;public MyRunnable(DownloadTask downTask)        {        super();        this.mDownTask = downTask;        this.mHandler = new MyHandler(mDownUtil);        this.mTimerTask = new MyTimerTask(mDownUtil, mHandler, mDownTask);        }@Overridepublic void run(){mTimer.schedule(mTimerTask, 0, TIMER_PERIOD);mDownUtil.downloadFile(mDownTask.getUrl());}}class MyTimerTask extends TimerTask{private Handler mHandler;private DownloadUtil mDownUtil;private DownloadTask mDownTask;private IOnDownloadListener mListener;public MyTimerTask(DownloadUtil downUtil, Handler handler, DownloadTask downTask)        {        super();        this.mHandler = handler;        this.mDownUtil = downUtil;        this.mDownTask = downTask;        this.mListener = new IOnDownloadListener(){@Overridepublic void updateNotification(int progress, int totalSize, File downFile){// TODO Auto-generated method stubint rate = 0;// 计算百分比if (totalSize > 0){rate = progress * 100 / totalSize;mHandler.obtainMessage(DOWN_LOADING, rate, mDownTask.getNotifyID(), mDownTask.getNotification()).sendToTarget();}else if (totalSize == 0){mHandler.obtainMessage(DOWN_LOADING, 0, mDownTask.getNotifyID(), mDownTask.getNotification()).sendToTarget();}else {cancel();mHandler.obtainMessage(DOWN_ERR, mDownTask).sendToTarget();}// 是否下载结束if (totalSize > 0 && null != downFile && totalSize == (int) downFile.length()){cancel();mHandler.obtainMessage(DOWN_COMPLETE, downFile).sendToTarget();map_downloadtask.remove(mDownTask.getUrl());// 移除已完成任务System.out.println("DOWN_COMPLETE ==> totalSize ==> " + totalSize);}}};        }@Overridepublic void run(){mDownUtil.setOnDownloadListener(mListener);}}class MyHandler extends Handler{private DownloadUtil mDownUtil;public MyHandler(DownloadUtil downUtil)        {        super();        this.mDownUtil = downUtil;        }@Overridepublic void handleMessage(Message msg){switch (msg.what){case DOWN_LOADING:((Notification)msg.obj).contentView.setProgressBar(R.id.pb, 100, msg.arg1, false);((Notification)msg.obj).contentView.setTextViewText(R.id.tv, "下载" + msg.arg1 + "%");mNotificationManager.notify(msg.arg2, ((Notification)msg.obj));System.out.println("DOWN_LOADING --> mNotifyId --> " + msg.arg2 + " --> " + msg.arg1 + "%");break;case DOWN_COMPLETE://mNotificationManager.cancel(mNotifyId);removeMessages(DOWN_LOADING);Toast.makeText(mContext, "下载完成", Toast.LENGTH_SHORT).show();mDownUtil.installApk(mContext, (File)msg.obj);System.out.println("======================DOWN_COMPLETE================================");stopService();break;case DOWN_ERR:removeMessages(DOWN_LOADING);map_downloadtask.remove(((DownloadTask)msg.obj).getUrl());Toast.makeText(mContext, "下载失败", Toast.LENGTH_SHORT).show();stopService();break;default:break;}}/** * 如果无下载任务，关闭服务 */private void stopService(){if(map_downloadtask.isEmpty()){stopSelf(-1);}}}}

封装Notification：

package com.example.bean;import android.app.Notification;import android.app.PendingIntent;import android.content.Context;import android.content.Intent;import android.widget.RemoteViews;import com.example.notification06.NotificationActivity06;import com.example.notification06.R;public class NotificationBean extends Notification{private Context mContext;public NotificationBean(Context context, int icon, CharSequence tickerText, long when){super(icon, tickerText, when);this.mContext = context;this.flags = Notification.FLAG_AUTO_CANCEL; // |= //this.flags = Notification.FLAG_ONGOING_EVENT;RemoteViews mRemoteView = new RemoteViews(mContext.getPackageName(), R.layout.remote_view);this.contentView = mRemoteView;Intent intent = new Intent(mContext, NotificationActivity06.class); // 点击安装APK 未实现intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);PendingIntent pIntent = PendingIntent.getActivity(mContext, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);this.contentIntent = pIntent;}}

封装下载任务DownloadTask：

package com.example.bean;import android.app.Notification;public class DownloadTask{private String url;private int notifyID;private Notification notification;public DownloadTask(){// TODO Auto-generated constructor stub}public Notification getNotification()    {    return notification;    }public void setNotification(Notification notification)    {    this.notification = notification;    }public int getNotifyID()    {    return notifyID;    }public void setNotifyID(int notifyID)    {    this.notifyID = notifyID;    }public String getUrl()    {    return url;    }public void setUrl(String url)    {    this.url = url;    }}

完毕。

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