android版本更新

版本更新是app必备的功能，下面实现最基本的版本更新功能

step1:MainActivity中的代码

<span style="white-space:pre"></span>/** * 获取本地版本号 * @return */public int getlocalVersion(){int localversion = 0;try {PackageInfo info = getPackageManager().getPackageInfo(getPackageName(), 0);localversion = info.versionCode;} catch (NameNotFoundException e) {e.printStackTrace();}return localversion;}/** * 获取服务器版本号 * @return */public int getServiceVersion(){int serviceversion = 2;return serviceversion;}/** * 版本更新 * @param v */public void updateVersion(View v){if(getServiceVersion() > getlocalVersion()){AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);builder.setTitle("检查到新版本");builder.setMessage("是否更新");builder.setNegativeButton("取消", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {}});builder.setPositiveButton("确定", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {startService(new Intent(MainActivity.this, UpdateService.class));}});builder.create().show();}}

step2: UpdateService中的代码

public class UpdateService extends Service {private String apkurl = "http://softfile.3g.qq.com:8080/msoft/179/24659/43549/qq_hd_mini_1.4.apk";private String apkPath;private String apkName;private boolean canceled = false;private NotificationManager manager;private Notification notification;@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic void onCreate() {super.onCreate();if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {apkPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/update";apkName = "3GQQ.apk";registerBroader();setUpNotifiction();new Thread(new DownApkRunnable()).start();} else {Toast.makeText(UpdateService.this, "SD卡不存在", Toast.LENGTH_SHORT).show();}}/** * 创建通知 */private void setUpNotifiction() {manager = (NotificationManager) getSystemService(Service.NOTIFICATION_SERVICE);int icon = R.drawable.ic_launcher;CharSequence tickerText = "开始下载";long when = System.currentTimeMillis();notification = new Notification(icon, tickerText, when);RemoteViews contentView = new RemoteViews(getPackageName(),R.layout.notify_update_layout);contentView.setTextViewText(R.id.name, "3gqq正在下载中");Intent canceledIntent = new Intent("canceled");canceledIntent.putExtra("canceled", "canceled");PendingIntent canceledPendingIntent = PendingIntent.getBroadcast(UpdateService.this, 1, canceledIntent,PendingIntent.FLAG_UPDATE_CURRENT);contentView.setOnClickPendingIntent(R.id.cancle, canceledPendingIntent);notification.contentView = contentView;Intent intent = new Intent(UpdateService.this, MainActivity.class);PendingIntent contentIntent = PendingIntent.getActivity(UpdateService.this, 0, intent,PendingIntent.FLAG_UPDATE_CURRENT);notification.contentIntent = contentIntent;manager.notify(0, notification);// 发送通知}/** * 取消接收者 *  * @author renzhiwen 创建时间 2014-8-16 下午4:05:24 */class CanceledReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {if ("canceled".equals(intent.getStringExtra("canceled"))) {canceled = true;manager.cancel(0);stopSelf();}}}/** * 注册广播 */public void registerBroader() {IntentFilter filter = new IntentFilter();filter.addAction("canceled");registerReceiver(new CanceledReceiver(), filter);}/** * 下载apk *  * @author renzhiwen 创建时间 2014-8-16 下午3:32:34 */class DownApkRunnable implements Runnable {@Overridepublic void run() {downloadApk();}}private int laterate = 0;private void downloadApk() {try {URL url = new URL(apkurl);HttpURLConnection conn = (HttpURLConnection) url.openConnection();int length = conn.getContentLength();int count = 0;File apkPathFile = new File(apkPath);if (!apkPathFile.exists()) {apkPathFile.mkdir();}File apkFile = new File(apkPath, apkName);InputStream in = conn.getInputStream();FileOutputStream os = new FileOutputStream(apkFile);byte[] buffer = new byte[1024];do {int numread = in.read(buffer);count += numread;int progress = (int) (((float) count / length) * 100);// 得到当前进度if (progress >= laterate + 1) {// 只有当前进度比上一次进度大于等于1，才可以更新进度laterate = progress;Message msg = new Message();msg.what = 1;msg.arg1 = progress;handler.sendMessage(msg);}if (numread <= 0) {// 下载完毕handler.sendEmptyMessage(2);canceled = true;break;}os.write(buffer, 0, numread);} while (!canceled);// 如果没有被取消in.close();os.close();} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.toString();e.printStackTrace();}}Handler handler = new Handler() {public void handleMessage(android.os.Message msg) {switch (msg.what) {case 1:// 更新进度int progress = msg.arg1;if (progress < 100) {RemoteViews contentView = notification.contentView;contentView.setTextViewText(R.id.tv_progress, progress+ "%");contentView.setProgressBar(R.id.progressbar, 100, progress,false);} else {// 下载完成，停止服务stopSelf();}manager.notify(0, notification);break;case 2:// 安装apkmanager.cancel(0);installApk();break;default:break;}}};/** * 安装apk */private void installApk() {File apkFile = new File(apkPath, apkName);if (!apkFile.exists()) {return;}Intent intent = new Intent(Intent.ACTION_VIEW);intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setDataAndType(Uri.parse("file://" + apkFile.toString()),"application/vnd.android.package-archive");startActivity(intent);}}