Android Status Bar Notification, Android notification

Android Status Bar Notification, Android notification

Android notifies users in three ways:

1. Toast Notification

2. Dialog Notification

3. Status Bar Notification, Status Bar Notification

Two types of status bar notifications must be sent: icationicationmanager and Notification.

1. icationicationmanager is a system Service and must be obtained through getSystemService ().

Icationicationmanager NotificationManager = (notificationManager) getSystemService (NOTIFICATION_SERVICE );

2. Notification is the specific status bar Notification object.

Call icationicationmanager's notify () method to create Notification

Two parts:

①: Status Bar notification

Notification. icon = R. drawable. ic_launcher;

Notification. tickerText = "My First Notification ";

Notification. when = System. currentTimeMillis ();

②: Drop-down notification list and click to jump:

Two methods:

I. setLatestEventInfo () method

Context context = getApplicationContext ();

CharSequence contentTitle = "Notification ";

CharSequence contentText = "Notification Context ";

Intent intent = new Intent (Main. this, Turn. class );

PendingIntent pendingIntent = PendingIntent. getActivity (Main. this, 0, intent, 0 );

Notification. setLatestEventInfo (context, contentTitle, contentText, pendingIntent );

Ii. Custom notification bar

Notification. flags = Notification. FLAG_AUTO_CANCEL; the notification is automatically canceled when the user clicks

Set two variables: contentView and contentIntent.

RemoteViews contenView = new RemoteViews (getPackageName (), R. layout. icationication_layout );

ContenView. setImageViewResource (R. id. icon, R. drawable. ic_launcher );

ContenView. setTextViewText (R. id. contentText, "Custom notification ");

Notification. contentView = contenView;

Intent intent1 = new Intent (Main. this, Turn. class );

PendingIntent pendingIntent1 = PendingIntent. getActivity (Main. this, 0, intent1, 0 );

Notification. contentIntent = pendingIntent1;

Tips:

Possible error: Couldn't expand RemoteViews:

Check whether the components not supported by RemoteViews are used in layout.

Check whether the layout file corresponding to RemoteViews has a basic error, for example, forgetting to declare width or higher.