NotificationManager仅在设备上崩溃

Question

我有一个我无法解释的问题.我有一个包含按钮的主要活动.单击此按钮时,它将启动一个新活动,从Internet下载xml文件.下载时会显示一条通知,指示下载进度.

这在我的AVD(API级别17)中完美运行.但是,当我尝试在我的设备中做同样的事情(GT-I1900与API级别10,Android版本2.3.3)它崩溃.

我认为notificationBuilder我使用的问题存在.

Context context = getApplicationContext();
notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationBuilder = new NotificationCompat.Builder(this);
notificationBuilder.setContentTitle("Download Progress").setContentText("Downloading").setSmallIcon(android.R.drawable.stat_sys_download);

...

notificationManager.notify(0, notificationBuilder.build());

为了下载,我使用了一个DownloadFilesTask(扩展AsyncTask)类,我测试过它并且工作正常.

这是异常日志:

    at android.app.NotificationManager.notify(NotificationManager.java:91)

所以我的问题是:如果我的设备的API级别存在问题,任何人都可以解释如何使用通知构建器来处理较低的API.

这是完整的日志:

02-01 23:06:28.862: E/AndroidRuntime(16860): FATAL EXCEPTION: AsyncTask #1
02-01 23:06:28.862: E/AndroidRuntime(16860): java.lang.RuntimeException: An error occured while executing doInBackground()
02-01 23:06:28.862: E/AndroidRuntime(16860):    at android.os.AsyncTask$3.done(AsyncTask.java:200)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at java.lang.Thread.run(Thread.java:1019)
02-01 23:06:28.862: E/AndroidRuntime(16860): Caused by: java.lang.IllegalArgumentException: contentIntent required: pkg=com.bakoproductions.easybet id=0 notification=Notification(vibrate=null,sound=null,defaults=0x0,flags=0x0)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at android.os.Parcel.readException(Parcel.java:1326)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at android.os.Parcel.readException(Parcel.java:1276)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at android.app.INotificationManager$Stub$Proxy.enqueueNotificationWithTag(INotificationManager.java:322)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at android.app.NotificationManager.notify(NotificationManager.java:111)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at android.app.NotificationManager.notify(NotificationManager.java:91)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at com.bakoproductions.easybet.XMLParser.downloadXML(XMLParser.java:83)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at com.bakoproductions.easybet.DownloadFilesTask.doInBackground(DownloadFilesTask.java:24)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at com.bakoproductions.easybet.DownloadFilesTask.doInBackground(DownloadFilesTask.java:1)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at android.os.AsyncTask$2.call(AsyncTask.java:185)
02-01 23:06:28.862: E/AndroidRuntime(16860):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
02-01 23:06:28.862: E/AndroidRuntime(16860):    ... 4 more

Answer 1

在较旧的Android版本中,您Notification 必须拥有内容Intent,以便在用户单击您的通知时,会发生某些事情.这意味着您必须:

制作一个Intent物体,指向某个地方,例如你的物体MainActivity.确保添加Intent.FLAG_ACTIVITY_NEW_TASK标志.

Intent intent = new Intent (this, MainActivity.class);
intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);

将其转换为PendingIntent

PendingIntent pend = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

最后,在构建器中,调用

notificationBuilder.setContentIntent (pend);