android之apk自动更新采用Notification通知提示并显示下载进度

首先整理一下apk自动更新的思路：1 比较服务器和本地apk的版本；2 如果服务器版本比较新，那么发出Notification通知用户下载；3用户点击开始下载；4下载完成发出用户提示用户点击安装；5 用户点击安装完成结束整个流程；

下面是效果图，可以先看下是否是你想要的效果咯，亲！







ok，接下来直接上代码。版本比较这个东西就不讲了，出发出Notification通知开始

//概要
String tickerText = context.getResources().getText(R.string.app_name).toString()+"发现新版本，建议您更新！";
//标题
String title = context.getResources().getText(R.string.app_name).toString()+"更新";
//内容
String content= "点击更新"+context.getResources().getText(R.string.app_name).toString();
//logo
int icon = R.drawable.logo;
Notification notification = new Notification(icon, tickerText, System.currentTimeMillis());
Intent updateinte = new Intent(context,UpdateService.class);
updateinte.putExtra("url",re);
PendingIntent pendingIntent = PendingIntent.getService(context, 0, updateinte, 0);//点击打开service下载
notification.setLatestEventInfo(context, title, content, pendingIntent);
notification.defaults = Notification.DEFAULT_SOUND;
notification.flags = Notification.FLAG_AUTO_CANCEL;
NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(101, notification);

下面是service下载类。下面的代码我自己遇到两个问题，Notification版本兼容系问题在http://blog.csdn.net/caicongyang/article/details/10190727做了解释，下载完成后解析包出现问题在http://blog.csdn.net/caicongyang/article/details/10183095做了解析，其他的很简单！

/**
* 下载更新服务
* @author Tom.Cai
*
*/
public class UpdateService extends Service {
private String url = null;
// 通知栏
private NotificationManager updateNotificationManager = null;
private Notification updateNotification = null;
private String appName = null;
private String fileName = null;
private String updateDir = null;

//通知栏跳转Intent

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// 获取传值
url = intent.getStringExtra("url");
appName = getApplication().getResources().getText(R.string.app_name).toString();
if (url != null) {
fileName = url.substring(url.lastIndexOf("/")+1);
updateDir = Environment.getDataDirectory() + "/data/" + this.getPackageName() + "/files/";
Intent nullIntent = new Intent();
PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, nullIntent, 0);
// 创建文件
updateNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
updateNotification = new Notification();
updateNotification.icon = R.drawable.logo;
updateNotification.tickerText = "正在更新" + appName;
updateNotification.setLatestEventInfo(getApplication(), "正在下载"+appName,"0%", null);
updateNotification.defaults = Notification.DEFAULT_SOUND;
updateNotification.flags = Notification.FLAG_AUTO_CANCEL;
updateNotification.contentIntent = pendingIntent;
updateNotificationManager.notify(101, updateNotification);
//开启线程现在
new Thread(new updateRunnable()).start();
}
return super.onStartCommand(intent, 0, 0);
}

private class updateRunnable implements Runnable {
Message message = updateHandler.obtainMessage();

public void run() {
message.what = 0;
try {
long downloadSize = downloadUpdateFile(url);
Log.i("cai", downloadSize/1024+"");
if (downloadSize > 0) {
// 下载成功
updateHandler.sendMessage(message);
}
} catch (Exception ex) {
ex.printStackTrace();
message.what = 1;
// 下载失败
updateHandler.sendMessage(message);
}
}
}

private Handler updateHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 0:
/*try {
Runtime.getRuntime().exec("chmod 777 " + updateDir.getAbsolutePath());
Runtime.getRuntime().exec("chmod 777 " + updateFile.getAbsolutePath());
} catch (IOException e) {
e.printStackTrace();
}*/
// 点击安装PendingIntent
Intent installIntent = new Intent(Intent.ACTION_VIEW);
//installIntent.addFlags(Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED| Intent.FLAG_ACTIVITY_NEW_TASK);
installIntent.setDataAndType(Uri.fromFile(new File(updateDir,fileName)),"application/vnd.android.package-archive");
//getApplication().startActivity(installIntent);*/
PendingIntent updatePendingIntent = PendingIntent.getActivity(UpdateService.this, 0, installIntent, 0);
updateNotification.defaults = Notification.DEFAULT_SOUND;// 铃声提醒
updateNotification.flags = Notification.FLAG_AUTO_CANCEL;
updateNotification.setLatestEventInfo(UpdateService.this,appName, "下载完成,点击安装", updatePendingIntent);
updateNotificationManager.notify(101, updateNotification);
// 停止服务
stopSelf();
break;
case 1:
Intent nullIntent = new Intent();
PendingIntent pendingIntent = PendingIntent.getActivity(UpdateService.this, 10, nullIntent, 0);
// 下载失败
updateNotification.setLatestEventInfo(UpdateService.this,appName, "网络连接不正常，下载失败！", pendingIntent);
updateNotification.flags = Notification.FLAG_AUTO_CANCEL;
updateNotificationManager.notify(101, updateNotification);
break;
default:
stopSelf();
}
}
};
//下载
@SuppressLint("WorldReadableFiles")
public long downloadUpdateFile(String downloadUrl) throws Exception {
int downloadCount = 0;
int currentSize = 0;
long totalSize = 0;
int updateTotalSize = 0;

HttpURLConnection httpConnection = null;
InputStream is = null;
FileOutputStream fos = null;

try {
URL url = new URL(downloadUrl);
httpConnection = (HttpURLConnection)url.openConnection();
if(currentSize > 0) {
httpConnection.setRequestProperty("RANGE", "bytes=" + currentSize + "-");
}
httpConnection.setConnectTimeout(10000);
httpConnection.setReadTimeout(20000);
updateTotalSize = httpConnection.getContentLength();
if (httpConnection.getResponseCode() == 404) {
throw new Exception("fail!");
}
is = httpConnection.getInputStream();
/* fos = new FileOutputStream(saveFile, false);*/
fos =  openFileOutput(fileName, MODE_WORLD_READABLE);

byte buffer[] = new byte[4096];
int readsize = 0;
while((readsize = is.read(buffer)) > 0){
fos.write(buffer, 0, readsize);
totalSize += readsize;
//为了防止频繁的通知导致应用吃紧，百分比增加10才通知一次
if((downloadCount == 0)||(int) (totalSize*100/updateTotalSize)-10>downloadCount){
downloadCount += 10;
Intent nullIntent = new Intent();
PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, nullIntent, 0);
updateNotification.contentIntent = pendingIntent;
updateNotification.setLatestEventInfo(UpdateService.this, appName+"正在下载", (int)totalSize*100/updateTotalSize+"%", null);
updateNotificationManager.notify(101, updateNotification);
}
}
} finally {
if(httpConnection != null) {
httpConnection.disconnect();
}
if(is != null) {
is.close();
}
if(fos != null) {
fos.close();
}
}
return totalSize;
}

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