我想在所有Android平台的通知中显示progressbar。我使用远程视图在android中显示progress bar。我已经在我的项目中添加了 android-support-v4 库。如果我替换
mBuilder = new NotificationCompat.Builder(MainActivity.this);
notification = mBuilder.build();
以
notification = new Notification(R.drawable.notification, "simulating a upload", System .currentTimeMillis());
然后显示通知，但不推荐使用方法。
以下是代码：
class SendDatabaseToServer extends
AsyncTask<ArrayList<LogFishMetadata>, Integer, String> {
private NotificationCompat.Builder mBuilder;
private NotificationManager mNotifyManager;
private RemoteViews remoteViews;
private Intent intent;
private PendingIntent pendingIntent;
private Notification notification;
private int notificationId = 1;
int start;
int percentage;
int inc;
public SendDatabaseToServer(int value) {
// TODO Auto-generated constructor stub
logout = value;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
mNotifyManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
intent = new Intent(MainActivity.this, MainActivity.class);
pendingIntent = PendingIntent.getActivity(MainActivity.this,
notificationId, intent, 0);
remoteViews = new RemoteViews(getPackageName(),
R.layout.notification_downloader);
mBuilder = new NotificationCompat.Builder(MainActivity.this);
notification = mBuilder.build();
//notification = new Notification(R.drawable.notification, "simulating a upload", System.currentTimeMillis());
notification.contentIntent = pendingIntent;
notification.flags = notification.flags
| Notification.FLAG_ONGOING_EVENT;
notification.contentView = remoteViews;
notification.contentView.setTextViewText(R.id.timeStamp, DateTime.getStringFromDate(new Date()));
notification.contentView.setTextViewText(R.id.progress,
"UPloading....");
notification.contentView.setProgressBar(R.id.progressBar, 100, 0,
false);
mNotifyManager.notify(notificationId, notification);
}
@Override
protected String doInBackground(ArrayList<LogFishMetadata>... params) {
// TODO Auto-generated method stub
int count = params[0].size();
percentage=100/count;
for (int i = 0; i < params[0].size(); i++) {
System.out.println("........." + i);
start=i*percentage;
inc=i+1;
try {
database.updateServerdata(params[0].get(i));
for(int j=start;j<=inc*percentage;j++)
{
publishProgress(j);
}
} catch (Exception e) {
// TODO: handle exception
}
}
return null;
}
@Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
// progressBar.setProgress(values[0]);
System.out.println("values......." + values[0]);
if(values[0]>=100)
{
values[0]=98;
}
notification.contentView.setProgressBar(R.id.progressBar, 100,
values[0], false);
mNotifyManager.notify(notificationId, notification);
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
notification.contentView.setTextViewText(R.id.progress,
"UPloading Complete");
notification.contentView.setProgressBar(R.id.progressBar,100, 100,
false);
mNotifyManager.notify(notificationId, notification);
if (logout == 2) {
System.out.println(" send Aler dialog....................................");
logoutConfirmationDialog("Sync Complete; Do you still want to logout?");
}
System.out.println("complete");
}
}
答案 0 :(得分：1)
您应该将兼容性库添加到项目中。您可以使用Android Tools|Add support Library来执行此操作。然后，您将使用该库中的NotificationCompat，它具有Builder
答案 1 :(得分：0)
我在我的一个项目中使用了以下代码，希望这可以帮助您：
DownloadTask类：
public class DownloadTask extends AsyncTask<String, Integer, Void> {
private NotificationHelper mNotificationHelper;
public static int notificationID = 1;
SharedPreferences settings;
SharedPreferences.Editor editor;
Context context;
String title;
public static String downlaodPath;
boolean download = false;
public DownloadTask(Context context, String title) {
this.context = context;
this.title = title;
mNotificationHelper = new NotificationHelper(context, title);
}
protected void onPreExecute() {
notificationID++;
mNotificationHelper.createNotification(notificationID);
}
@Override
protected Void doInBackground(String... aurl) {
try {
URL url = new URL(aurl[0]);
URLConnection conexion = url.openConnection();
conexion.connect();
downlaodPath = "mnt/sdcard/Demo/"+title + ".mp3";
File file = new File("mnt/sdcard/Demo/");
file.mkdirs();
File outputfile = new File(file, title + ".mp3");
FileOutputStream fileOutput = new FileOutputStream(outputfile);
InputStream inputStream = conexion.getInputStream();
int totalSize = conexion.getContentLength();
int downloadedSize = 0;
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ((bufferLength = inputStream.read(buffer)) != -1) {
downloadedSize += bufferLength;
onProgressUpdate((int) ((downloadedSize * 100) / totalSize));
fileOutput.write(buffer, 0, bufferLength);
}
fileOutput.close();
} catch (Exception e) {
download = true;
e.printStackTrace();
}
return null;
}
protected void onProgressUpdate(Integer... progress) {
mNotificationHelper.progressUpdate(progress[0]);
}
protected void onPostExecute(Void result) {
if (download) {
Toast.makeText(context, "Could Not Connect to Server.", 5).show();
mNotificationHelper.clearNotification();
}
else
mNotificationHelper.completed();
}
}
NotificationHelper Class：
public class NotificationHelper extends Activity {
private Context mContext;
private int NOTIFICATION_ID = 1;
private Notification mNotification;
private NotificationManager mNotificationManager;
private PendingIntent mContentIntent;
private CharSequence mContentTitle;
private String title;
CharSequence tickerText;
int icon;
public NotificationHelper(Context context, String title) {
mContext = context;
this.title = title;
}
public void createNotification(int newtask) {
mNotificationManager = (NotificationManager) mContext
.getSystemService(Context.NOTIFICATION_SERVICE);
NOTIFICATION_ID = newtask;
icon = android.R.drawable.stat_sys_download;
tickerText = mContext.getString(R.string.download);
long when = System.currentTimeMillis();
mNotification = new Notification(icon, tickerText, when);
mContentTitle = title;
CharSequence contentText = "0% complete";
Intent notificationIntent = new Intent();
mContentIntent = PendingIntent.getActivity(mContext, 0,
notificationIntent, 0);
mNotification.setLatestEventInfo(mContext, mContentTitle, contentText,
mContentIntent);
mNotification.flags = Notification.FLAG_ONGOING_EVENT;
mNotificationManager.notify(NOTIFICATION_ID, mNotification);
}
public void progressUpdate(int percentageComplete) {
CharSequence contentText = percentageComplete + "% complete";
mNotification.setLatestEventInfo(mContext, mContentTitle, contentText,
mContentIntent);
mNotificationManager.notify(NOTIFICATION_ID, mNotification);
}
public void completed() {
mNotificationManager.cancel(NOTIFICATION_ID);
Notification completeNotification = new Notification(icon, tickerText,
System.currentTimeMillis());
try {
PackageManager packageManager = mContext.getPackageManager();
Intent completeIntent = new Intent();
PendingIntent cIntent = PendingIntent.getActivity(mContext, 0,
completeIntent, 0);
completeNotification.setLatestEventInfo(mContext, title,
"Download Complete", cIntent);
completeNotification.flags = Notification.FLAG_AUTO_CANCEL;
mNotificationManager.notify(NOTIFICATION_ID, completeNotification);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
Log.e("LOG", "last");
TestFragment3.activity.sendBroadcast(new Intent(
Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"
+ Environment.getExternalStorageDirectory())));
}
public void clearNotification() {
mNotificationManager.cancel(NOTIFICATION_ID);
}
}