【oschina android源码分析】下载更新新版本的设计
一.设置页面点击检查新版本
private void onClickUpdate() {
new UpdateManager(getActivity(), true).checkUpdate();
}
二.访问网络更新版本
public void checkUpdate() {
if (isShow) {
showCheckDialog();
}
OSChinaApi.checkUpdate(mCheckUpdateHandle);
}
private AsyncHttpResponseHandler mCheckUpdateHandle = new AsyncHttpResponseHandler() {
@Override
public void onFailure(int arg0, Header[] arg1, byte[] arg2,
Throwable arg3) {
hideCheckDialog();
if (isShow) {
showFaileDialog();
}
}
@Override
public void onSuccess(int arg0, Header[] arg1, byte[] arg2) {
hideCheckDialog();
mUpdate = XmlUtils.toBean(Update.class,
new ByteArrayInputStream(arg2));
onFinshCheck();
}
}; private void onFinshCheck() {
if (haveNew()) {
showUpdateInfo();
} else {
if (isShow) {
showLatestDialog();
}
}
}
public boolean haveNew() {
if (this.mUpdate == null) {
return false;
}
boolean haveNew = false;
int curVersionCode = TDevice.getVersionCode(AppContext
.getInstance().getPackageName());
if (curVersionCode < mUpdate.getUpdate().getAndroid()
.getVersionCode()) {
haveNew = true;
}
return haveNew;
}
三.有新版本的弹窗提示
private void showUpdateInfo() {
if (mUpdate == null) {
return;
}
AlertDialog.Builder dialog = DialogHelp.getConfirmDialog(mContext, mUpdate.getUpdate().getAndroid().getUpdateLog(), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
UIHelper.openDownLoadService(mContext, mUpdate.getUpdate().getAndroid().getDownloadUrl(), mUpdate.getUpdate().getAndroid().getVersionName());
}
});
dialog.setTitle("发现新版本");
dialog.show();
}
四.新版本下载服务分析
采用的是在同一进程中的绑定服务
public static void openDownLoadService(Context context, String downurl,
String tilte) {
final ICallbackResult callback = new ICallbackResult() {
@Override
public void OnBackResult(Object s) {}
};
ServiceConnection conn = new ServiceConnection() {
@Override
public void onServiceDisconnected(ComponentName name) {}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
DownloadBinder binder = (DownloadBinder) service;
binder.addCallback(callback);
binder.start();
}
};
Intent intent = new Intent(context, DownloadService.class);
intent.putExtra(DownloadService.BUNDLE_KEY_DOWNLOAD_URL, downurl);
intent.putExtra(DownloadService.BUNDLE_KEY_TITLE, tilte);
context.startService(intent);
context.bindService(intent, conn, Context.BIND_AUTO_CREATE);
}
public class DownloadService extends Service {
public static final String BUNDLE_KEY_DOWNLOAD_URL = "download_url";
public static final String BUNDLE_KEY_TITLE = "title";
private final String tag = "download";
private static final int NOTIFY_ID = 0;
private int progress;
private NotificationManager mNotificationManager;
private boolean canceled;
private String downloadUrl;
private String mTitle = "正在下载%s";
private String saveFileName = AppConfig.DEFAULT_SAVE_FILE_PATH;
private ICallbackResult callback;
private DownloadBinder binder;
private boolean serviceIsDestroy = false;
private Context mContext = this;
private Thread downLoadThread;
private Notification mNotification;
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
switch (msg.what) {
case 0:
// 下载完毕
mNotificationManager.cancel(NOTIFY_ID);
installApk();
break;
case 2:
// 取消通知
mNotificationManager.cancel(NOTIFY_ID);
break;
case 1:
int rate = msg.arg1;
if (rate < 100) {
RemoteViews contentview = mNotification.contentView;
contentview.setTextViewText(R.id.tv_download_state, mTitle + "(" + rate
+ "%" + ")");
contentview.setProgressBar(R.id.pb_download, 100, rate,
false);
} else {
// 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, MainActivity.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 IBinder onBind(Intent intent) {
downloadUrl = intent.getStringExtra(BUNDLE_KEY_DOWNLOAD_URL);
saveFileName = saveFileName + getSaveFileName(downloadUrl);
mTitle = String.format(mTitle, intent.getStringExtra(BUNDLE_KEY_TITLE));
return binder;
}
private String getSaveFileName(String downloadUrl) {
if (downloadUrl == null || StringUtils.isEmpty(downloadUrl)) {
return "";
}
return downloadUrl.substring(downloadUrl.lastIndexOf("/"));
}
@Override
public void onCreate() {
super.onCreate();
binder = new DownloadBinder();
mNotificationManager = (NotificationManager) getSystemService(android.content.Context.NOTIFICATION_SERVICE);
stopForeground(true);// 这个不确定是否有作用
}
private void startDownload() {
canceled = false;
downloadApk();
}
/** * 创建通知 */
private void setUpNotification() {
int icon = R.drawable.ic_notification;
CharSequence tickerText = "准备下载";
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_show);
contentView.setTextViewText(R.id.tv_download_state, mTitle);
// 指定个性化视图
mNotification.contentView = contentView;
Intent intent = new Intent(this, MainActivity.class);
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);
}
private void downloadApk() {
downLoadThread = new Thread(mdownApkRunnable);
downLoadThread.start();
}
/** * 安装apk */
private void installApk() {
File apkfile = new File(saveFileName);
if (!apkfile.exists()) {
return;
}
TDevice.installAPK(mContext, apkfile);
}
private Runnable mdownApkRunnable = new Runnable() {
@Override
public void run() {
File file = new File(AppConfig.DEFAULT_SAVE_FILE_PATH);
if (!file.exists()) {
file.mkdirs();
}
String apkFile = saveFileName;
File saveFile = new File(apkFile);
try {
downloadUpdateFile(downloadUrl, saveFile);
} catch (Exception e) {
e.printStackTrace();
}
}
};
public long downloadUpdateFile(String downloadUrl, File saveFile)
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();
httpConnection
.setRequestProperty("User-Agent", "PacificHttpClient");
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);
byte buffer[] = new byte[1024];
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;
// 更新进度
Message msg = mHandler.obtainMessage();
msg.what = 1;
msg.arg1 = downloadCount;
mHandler.sendMessage(msg);
if (callback != null)
callback.OnBackResult(progress);
}
}
// 下载完成通知安装
mHandler.sendEmptyMessage(0);
// 下载完了，cancelled也要设置
canceled = true;
} finally {
if (httpConnection != null) {
httpConnection.disconnect();
}
if (is != null) {
is.close();
}
if (fos != null) {
fos.close();
}
}
return totalSize;
}
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;
}
}
}