下载更新包,并且在任务栏提示进度.

public class UpdateService extends Service {
    private int count =0 ;
    private ProgressBar bar;
    private Button btnC;
    private RemoteViews rv;
    Notification notification;
    NotificationManager mManager;
    /* 下载保存路径 */
    private String mSavePath;
    /* 保存解析的XML信息 */
    HashMap<String, String> mHashMap;

    private boolean notUpdating = false;

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        mManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        // Notification notification = new Notification.Builder(this)
        // .setContentTitle("New mail from " + "linsenxxxx")
        // .setContentText("setContentText setContentText setContentText ")
        // .setSmallIcon(R.drawable.tag02)
        // .build();
        notification = new Notification(R.drawable.ic_launcher, "正在下载更新包", System.currentTimeMillis());

    }

    Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
            case 0x111:
                rv.setProgressBar(R.id.update_progressBar, 100, count, false);
                notification.contentView = rv;
                mManager.notify(0, notification);
                break;
            case 0x222:
                // 安装文件
                installApk();
                mManager.cancelAll();
                break;

            case 0x333:
                showToast();
                break;

            }
        }
    };

    

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        /* 获取intent */
        // Intent it = new Intent(this, UpdateActivity.class);
        Bundle bundle = (Bundle) intent.getExtras();
        if (bundle != null) {
            mHashMap = (HashMap<String, String>) bundle.getSerializable("HashMap");
            Log.v("0627", "hashmap" + mHashMap.get("url"));
        }
        PendingIntent contentIntent = PendingIntent.getActivity(this, R.string.app_name, intent,
                PendingIntent.FLAG_UPDATE_CURRENT);
        notification.setLatestEventInfo(this, "Hello,there!", "Hello,there,I'm john.", contentIntent);
        rv = new RemoteViews(this.getPackageName(), R.layout.update_progress_bar);

        notification.contentView = rv;
        

        // 开启任务的通知
        mManager.notify(0, notification);

        // 开启下载任务
        new DownloadApkThread().start();

        // new Thread() {
        // public void run() {
        //
        //
        // for (int i = 0; i < 100; i++) {
        // try {
        // sleep(1000);
        // } catch (Exception e) {
        // Log.v("0627", "error");
        // }
        // Log.v("0627", String.valueOf(++count));
        // count = i;
        // handler.sendEmptyMessage(0x111);
        // }
        // }
        // }.start();

        return 0;
    }

    private class DownloadApkThread extends Thread {
        @Override
        public void run() {
            try {
                // 判断SD卡是否存在，并且是否具有读写权限
                if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                    // 获得存储卡的路径
                    String sdpath = Environment.getExternalStorageDirectory() + "/";
                    mSavePath = sdpath + "download";
                    URL url = new URL(mHashMap.get("url"));
                    // 创建连接
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                    conn.connect();
                    // 获取文件大小
                    int length = conn.getContentLength();
                    // 创建输入流
                    InputStream is = conn.getInputStream();

                    File file = new File(mSavePath);
                    // 判断文件目录是否存在
                    if (!file.exists()) {
                        file.mkdir();
                    }
                    File apkFile = new File(mSavePath, mHashMap.get("name"));
                    FileOutputStream fos = new FileOutputStream(apkFile);
                    int counttemp = 0;
                    // 缓存
                    byte buf[] = new byte[1024];
                    // 写入到文件中
                    do {
                        int numread = is.read(buf);
                        counttemp += numread;
                        // 计算进度条位置
                        int countTemp = (int) (((float) counttemp / length) * 100);
                        if(count<countTemp){
                            count = countTemp;
                            mHandler.sendEmptyMessage(0x111);
                        }
                        Log.v("0627","countTEMP==="+String.valueOf(countTemp));
                        Log.v("0627","count==="+String.valueOf(count));
                        
                        // 更新进度
                    
                        if (numread <= 0) {
                            // 下载完成
                            mHandler.sendEmptyMessage(0x222);
                            break;
                        }
                        // 写入文件
                        fos.write(buf, 0, numread);
                    } while (!notUpdating);// 点击取消就停止下载.
                    fos.close();
                    is.close();
                }
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            // 取消下载对话框显示
            // mDownloadDialog.dismiss();
        }
    };
    public void showToast() {
        Dialog d = new AlertDialog.Builder(this).setTitle(R.string.soft_update_title).setMessage(R.string.sdcard_no)
                .setNegativeButton("知道了！", new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // TODO Auto-generated method stub
                        dialog.dismiss();
                    }
                }).create();
        d.show();
    }

    /**
     * 安装APK文件
     */
    private void installApk() {
        File apkfile = new File(mSavePath, mHashMap.get("name"));
        if (!apkfile.exists()) {
            return;
        }
        // 通过Intent安装APK文件
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(i);
    }
}