android检测版本更新，通知栏显示下载进度

package com.zeng.update; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.List; import com.zeng.update.NotificationUpdateActivity.ICallbackResult; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.Binder; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.widget.RemoteViews; public class DownloadService extends Service { private static final int NOTIFY_ID = 0; private int progress; private NotificationManager mNotificationManager; private boolean canceled; // 返回的安装包url private String apkUrl = "http://softfile.3g.qq.com:8080/msoft/179/24659/43549/qq_hd_mini_1.4.apk"; // private String apkUrl = MyApp.downloadApkUrl; /* 下载包安装路径 */ private static final String savePath = "/sdcard/updateApkDemo/"; private static final String saveFileName = savePath + "3GQQ_AppUpdate.apk"; private ICallbackResult callback; private DownloadBinder binder; private MyApp app; private boolean serviceIsDestroy = false; private Context mContext = this; private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { // TODO Auto-generated method stub super.handleMessage(msg); switch (msg.what) { case 0: app.setDownload(false); // 下载完毕 // 取消通知 mNotificationManager.cancel(NOTIFY_ID); installApk(); break; case 2: app.setDownload(false); // 这里是用户界面手动取消，所以会经过activity的onDestroy();方法 // 取消通知 mNotificationManager.cancel(NOTIFY_ID); break; case 1: int rate = msg.arg1; app.setDownload(true); if (rate < 100) { RemoteViews contentview = mNotification.contentView; contentview.setTextViewText(R.id.tv_progress, rate + "%"); contentview.setProgressBar(R.id.progressbar, 100, rate, false); } else { System.out.println("下载完毕!!!!!!!!!!!"); // 下载完毕后变换通知形式 mNotification.flags = Notification.FLAG_AUTO_CANCEL; mNotification.contentView = null; Intent intent = new Intent(mContext, NotificationUpdateActivity.class); // 告知已完成 intent.putExtra("completed", "yes"); // 更新参数,注意flags要使用FLAG_UPDATE_CURRENT PendingIntent contentIntent = PendingIntent.getActivity(mContext, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT); mNotification.setLatestEventInfo(mContext, "下载完成", "文件已下载完毕", contentIntent); // serviceIsDestroy = true; stopSelf();// 停掉服务自身 } mNotificationManager.notify(NOTIFY_ID, mNotification); break; } } }; // // @Override // public int onStartCommand(Intent intent, int flags, int startId) { // // TODO Auto-generated method stub // return START_STICKY; // } @Override public IBinder onBind(Intent intent) { // TODO Auto-generated method stub System.out.println("是否执行了 onBind"); return binder; } @Override public void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); System.out.println("downloadservice ondestroy"); // 假如被销毁了，无论如何都默认取消了。 app.setDownload(false); } @Override public boolean onUnbind(Intent intent) { // TODO Auto-generated method stub System.out.println("downloadservice onUnbind"); return super.onUnbind(intent); } @Override public void onRebind(Intent intent) { // TODO Auto-generated method stub super.onRebind(intent); System.out.println("downloadservice onRebind"); } @Override public void onCreate() { // TODO Auto-generated method stub super.onCreate(); binder = new DownloadBinder(); mNotificationManager = (NotificationManager) getSystemService(android.content.Context.NOTIFICATION_SERVICE); setForeground(true);// 这个不确定是否有作用 app = (MyApp) getApplication(); } public class DownloadBinder extends Binder { public void start() { if (downLoadThread == null || !downLoadThread.isAlive()) { progress = 0; setUpNotification(); new Thread() { public void run() { // 下载 startDownload(); }; }.start(); } } public void cancel() { canceled = true; } public int getProgress() { return progress; } public boolean isCanceled() { return canceled; } public boolean serviceIsDestroy() { return serviceIsDestroy; } public void cancelNotification() { mHandler.sendEmptyMessage(2); } public void addCallback(ICallbackResult callback) { DownloadService.this.callback = callback; } } private void startDownload() { // TODO Auto-generated method stub canceled = false; downloadApk(); } // Notification mNotification; // 通知栏 /** * 创建通知 */ private void setUpNotification() { int icon = R.drawable.icon; CharSequence tickerText = "开始下载"; long when = System.currentTimeMillis(); mNotification = new Notification(icon, tickerText, when); ; // 放置在"正在运行"栏目中 mNotification.flags = Notification.FLAG_ONGOING_EVENT; RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.download_notification_layout); contentView.setTextViewText(R.id.name, "腾讯QQ.apk 正在下载..."); // 指定个性化视图 mNotification.contentView = contentView; Intent intent = new Intent(this, NotificationUpdateActivity.class); // 下面两句是 在按home后，点击通知栏，返回之前activity 状态; // 有下面两句的话，假如service还在后台下载， 在点击程序图片重新进入程序时，直接到下载界面，相当于把程序MAIN 入口改了 - - // 是这么理解么。。。 // intent.setAction(Intent.ACTION_MAIN); // intent.addCategory(Intent.CATEGORY_LAUNCHER); PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT); // 指定内容意图 mNotification.contentIntent = contentIntent; mNotificationManager.notify(NOTIFY_ID, mNotification); } // /** * 下载apk * * @param url */ private Thread downLoadThread; private void downloadApk() { downLoadThread = new Thread(mdownApkRunnable); downLoadThread.start(); } /** * 安装apk * * @param url */ private void installApk() { File apkfile = new File(saveFileName); if (!apkfile.exists()) { return; } Intent i = new Intent(Intent.ACTION_VIEW); i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive"); mContext.startActivity(i); callback.OnBackResult("finish"); } private int lastRate = 0; private Runnable mdownApkRunnable = new Runnable() { @Override public void run() { try { URL url = new URL(apkUrl); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.connect(); int length = conn.getContentLength(); InputStream is = conn.getInputStream(); File file = new File(savePath); if (!file.exists()) { file.mkdirs(); } String apkFile = saveFileName; File ApkFile = new File(apkFile); FileOutputStream fos = new FileOutputStream(ApkFile); int count = 0; byte buf[] = new byte[1024]; do { int numread = is.read(buf); count += numread; progress = (int) (((float) count / length) * 100); // 更新进度 Message msg = mHandler.obtainMessage(); msg.what = 1; msg.arg1 = progress; if (progress >= lastRate + 1) { mHandler.sendMessage(msg); lastRate = progress; if (callback