Android多任务下载,使用Notification显示、更新进度条
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使用Notification显示、更新多任务下载进度。
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。
由于水平有限,只是实现了功能,代码功底神马的,就不要挑剔了哈,大牛请绕道!!!
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;
- @Override
- public 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;
- @Override
- public IBinder onBind(Intent intent)
- {
- return null;
- }
- @Override
- public void onDestroy()
- {
- super.onDestroy();
- }
- @Override
- public void onCreate()
- {
- // TODO Auto-generated method stub
- super.onCreate();
- mTimer = new Timer();
- mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
- map_downloadtask = new HashMap<String, DownloadTask>();
- }
- @Override
- public 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);
- }
- @Override
- public 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()
- {
- @Override
- public void updateNotification(int progress, int totalSize, File downFile)
- {
- // TODO Auto-generated method stub
- int 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);
- }
- }
- };
- }
- @Override
- public void run()
- {
- mDownUtil.setOnDownloadListener(mListener);
- }
- }
- class MyHandler extends Handler
- {
- private DownloadUtil mDownUtil;
- public MyHandler(DownloadUtil downUtil)
- {
- super();
- this.mDownUtil = downUtil;
- }
- @Override
- public 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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