android 自动提示软件更新

package com.test.up_soft; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import java.util.Map; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.InputSource; import com.test.up_soft.R; 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.content.pm.PackageManager.NameNotFoundException; import android.net.Uri; import android.os.Binder; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.util.Log; import android.widget.RemoteViews; import android.widget.Toast; public class DownloadService extends Service { private static final int NOTIFY_DOW_ID = 0; private static final int NOTIFY_OK_ID = 1; private Context mContext = this; private boolean cancelled; private int progress; private NotificationManager mNotificationManager; private Notification mNotification; private DownloadBinder binder = new DownloadBinder(); private String pastVersion; //旧的本号 private String serverUrl = "http://192.168.1.30:800/tcm_android_web/apk/"; //服务器下载地址 private String xmlName ="versionInfo.xml"; //XML文件名 private int fileSize; //文件大小 private int readSize; //读取长度 private int downSize; //已下载大小 private File downFile; //下载的文件 private Map<String, String> versionInfo; //版本信息 public enum versionInfoField { filename, filetype, version, description } private Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { switch (msg.what) { case 0: // 更新进度 RemoteViews contentView = mNotification.contentView; contentView.setTextViewText(R.id.rate, (readSize < 0 ? 0 : readSize) + "b/s " + msg.arg1 + "%"); contentView.setProgressBar(R.id.progress, 100, msg.arg1, false); // 更新UI mNotificationManager.notify(NOTIFY_DOW_ID, mNotification); break; case 1: mNotificationManager.cancel(NOTIFY_DOW_ID); createNotification(NOTIFY_OK_ID); /*打开文件进行安装*/ openFile(downFile); break; case 2: mNotificationManager.cancel(NOTIFY_DOW_ID); break; } }; }; private Handler handMessage = new Handler() { public void handleMessage(Message msg) { switch(msg.what) { case 0: Toast.makeText(mContext, "服务器连接失败，请稍后再试！", Toast.LENGTH_SHORT).show(); break; case 1: Toast.makeText(mContext, "服务器端文件不存在，下载失败！", Toast.LENGTH_SHORT).show(); break; } handler.sendEmptyMessage(2); } }; @Override public void onCreate() { super.onCreate(); mNotificationManager = (NotificationManager) getSystemService(android.content.Context.NOTIFICATION_SERVICE); cancelled = true; } @Override public IBinder onBind(Intent intent) { // 返回自定义的DownloadBinder实例 return binder; } @Override public void onDestroy() { super.onDestroy(); cancelled = true; // 取消下载线程 } /** * 创建通知 */ private void createNotification(int notifyId) { switch(notifyId) { case NOTIFY_DOW_ID: 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(mContext.getPackageName(), R.layout.download_notification_layout); contentView.setTextViewText(R.id.fileName, "正在下载：" + versionInfo.get(versionInfoField.filename.toString()) + "." + versionInfo.get(versionInfoField.filetype.toString())); // 指定个性化视图 mNotification.contentView = contentView; Intent intent = new Intent(this, MainForm.class); PendingIntent contentIntent = PendingIntent.getActivity(mContext, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT); // 指定内容意图 mNotification.contentIntent = contentIntent; break; case NOTIFY_OK_ID: int icon2 = R.drawable.icon; CharSequence tickerText2 = "下载完毕"; long when2 = System.currentTimeMillis(); mNotification = new Notification(icon2, tickerText2, when2); //放置在"通知形"栏目中 mNotification.flags = Notification.FLAG_AUTO_CANCEL; PendingIntent contentInten2 = PendingIntent.getActivity(mContext, 0, null, 0); mNotification.setLatestEventInfo(mContext, "下载完成", "文件已下载完毕", contentInten2); stopSelf();//停掉服务自身 Toast.makeText(DownloadService.this, "下载完成", Toast.LENGTH_SHORT).show(); cancelled = true; break; } // 最后别忘了通知一下,否则不会更新 mNotificationManager.notify(notifyId, mNotification); } /** * 下载模块 */ private void startDownload() { String dowUrl = serverUrl + versionInfo.get(versionInfoField.filename.toString()) + "." + versionInfo.get(versionInfoField.filetype.toString()); //初始化数据 fileSize = 0; readSize = 0; downSize = 0; progress = 0; InputStream is = null; FileOutputStream fos = null; try { URL myURL = new URL(dowUrl); //取得URL URLConnection conn = myURL.openConnection(); //建立联机 conn.connect(); fileSize = conn.getContentLength(); //获取文件长度 is = conn.getInputStream(); //InputStream 下载文件 if (is == null) { Log.d("tag","error"); throw new RuntimeException("stream is null"); } //建立临时文件 downFile = File.createTempFile(versionInfo.get(versionInfoField.filename.toString()), "." + versionInfo.get(versionInfoField.filetype.toString())); //将文件写入临时盘 fos = new FileOutputStream(downFile); byte buf[] = new byte[1024 * 1024]; while (!cancelled && (readSize = is.read(buf)) > 0) { fos.write(buf, 0, readSize); downSize += readSize; sendMessage(0); } if(cancelled) { handler.sendEmptyMessage(2); downFile.delete(); } else { handler.sendEmptyMessage(1); } } catch (MalformedURLException e) { handMessage.sendEmptyMessage(0); } catch (IOException e) { handMessage.sendEmptyMessage(1); } catch (Exception e) { handMessage.sendEmptyMessage(0); }