NotificationManager 和Notification的使用总结(转)
文章分类:移动开发
这几天一直在修改twigee的源代码,其中一个要加入的功能是常驻Notification栏,以前写的时候只能出现 在“通知”这一组中,想把它放在“正在运行”组中却不知道怎么放,查了下官方文档,找到了方法,在notification的flags字段中加一下 “FLAG_ONGOING_EVENT”就可以了。同时我也把Notification的使用方法给总结了一下。详见下文:
(1)、使用系统定义的Notification
以下是使用示例代码:
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager)getSystemService(ns);
int icon = R.drawable.icon;
CharSequence tickerText = "Hello";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon,tickerText,when);
Context context = getApplicationContext();
CharSequence contentTitle = "My Notification";
CharSequence contentText = "Hello World!";
Intent notificationIntent = new Intent(this,Main.class);
PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0);
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
mNotificationManager.notify(0,notification);
如果想要更新一个通知,只需要在设置好notification之后,再次调用 setLatestEventInfo(),然后重新发送一次通知即可,即再次调用notify()。
(2)、使用自定义的 Notification
要创建一个自定义的Notification,可以使用RemoteViews。要定义自己的扩展消息,首先 要初始化一个RemoteViews对象,然后将它传递给Notification的contentView字段,再把PendingIntent传递给 contentIntent字段。以下示例代码是完整步骤:
<?xml version="1.0" encoding="utf-8"?>
android:layout_width="fill_parent" android:layout_height="fill_parent">
<ImageView android:id="@+id/image" android:layout_width="wrap_content"
android:layout_height="fill_parent" android:layout_marginRight="10dp" />
<TextView android:id="@+id/text" android:layout_width="wrap_content"
android:layout_height="fill_parent" android:textColor="#000" />
</LinearLayout>
RemoteViews contentView = new RemoteViews(getPackageName(),R.layout.view);
contentView.setImageViewResource(R.id.image,R.drawable.icon);
contentView.setTextViewText(R.id.text,”Hello,this message is in a custom expanded view”);
notification.contentView = contentView;
Intent notificationIntent = new Intent(this,Main.class);
PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0);
notification.contentIntent = contentIntent;
mNotificationManager.notify(2,notification);
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager)getSystemService(ns);
int icon = R.drawable.icon;
CharSequence tickerText = "Hello";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon,tickerText,when);
RemoteViews contentView = new RemoteViews(getPackageName(),R.layout.view);
contentView.setImageViewResource(R.id.image, R.drawable.iconempty);
contentView.setTextViewText(R.id.text, "Hello,this is JC");
notification.contentView = contentView;
Intent notificationIntent = new Intent(this,Main.class);
PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0);
notification.contentIntent = contentIntent;
mNotificationManager.notify(0,notification);