如何更新与RemoteViews通知？ [英] How to update Notification with RemoteViews?
问题描述
我要创建与 RemoteViews 的通知从一个自定义的服务，这是与通知在前台模式下运行（即，服务会一直保持活跃的通知是可见的用户）。通知被设置为持续让用户无法刷卡而过。
I'm creating a notification with RemoteViews from a custom Service, which is running with notification in a foreground mode (that is, service will remain active as long as notification is visible to user). Notification is set as Ongoing so user cannot swipe it off.
我想更改为的ImageView ，其中包含了远程视图的布局或更改文本值的TextView 。布局远程视图设置与 XML 布局文件。
I'd like to change for example bitmap shown in ImageView, contained within remote view's layout or change text value in a TextView. Layout in remote view is set with xml layout file.
我的问题是，一旦通知，是创建和可见的用户，如果我叫任 RemoteViews 中的功能，如 setImageViewResource 来改变一个 ImageView的显示位图，变化是不可见的，除非以后我也叫 setImageViewResource 我打电话算账：
My problem is that once notification is created and visible to user, if I call any of RemoteViews's functions like setImageViewResource to change Bitmap shown in an ImageView, change is not visible, unless after I do call setImageViewResource I call afterwards:
NotificationManager.notify( id, notification );
或
Service.startForeground(id,notification);
这听起来是不是我的权利，虽然。我不能相信，更新 RemoteViews UI在已创建的通知，我不得不重新初始化通知。如果我有按钮的通知控制，它更新自己的触摸和释放。因此，有一定有办法妥善做到这一点，但我不知道怎么办。
This doesn't sound right to me though. I can't believe that to update RemoteViews UI in notification that is already created, I have to re-initialize notification. If I have Button control in notification, it updates itself on touch and release. So there's gotta be a way to do this properly, but I don't know how.
下面是我的code创造通知我服务实例中：
Here is my code which creates notification inside my Service instance:
this.notiRemoteViews = new MyRemoteViews(this,this.getApplicationContext().getPackageName(),R.layout.activity_noti1);
Notification.Builder notibuilder = new Notification.Builder(this.getApplicationContext());
notibuilder.setContentTitle("Test");
notibuilder.setContentText("test");
notibuilder.setSmallIcon(R.drawable.icon2);
notibuilder.setOngoing(true);
this.manager = (NotificationManager)this.getSystemService(Context.NOTIFICATION_SERVICE);
this.noti = notibuilder.build();
this.noti.contentView = this.notiRemoteViews;
this.noti.bigContentView = this.notiRemoteViews;
this.startForeground(NOTIFICATION_ID, this.noti);
和功能势力用户界面的变化通知：
And function that 'forces' UI changes to notification:
public void updateNotiUI(){
this.startForeground(NOTIFICATION_ID, this.noti);
}
在 MyRemoteViews 类，需要的时候，我这样做是为了更改用户界面：
Within MyRemoteViews class, when required, I do this to make changes to UI:
this.setImageViewResource(R.id.iconOFF, R.drawable.icon_off2);
this.ptMyService.updateNotiUI();
谁能告诉我什么是通知更新 RemoteViews 的UI组件的正确方法是什么？
Can anyone tell me what is the correct way of updating UI components of a RemoteViews in notification?
推荐答案
下面是为您更新到 RemoteViews 的通知（本例中的类发生了一个详细的例子扩展服务，您可以在活动中使用它，的BroadcastReceiver ，而在其他Android组件）：
Here's a detail example for you to update the notification through RemoteViews (this example took place in a class that extends Service, you can use it in activity, BroadcastReceiver, and in other Android components):
private static final int NOTIF_ID = 1234;
private NotificationCompat.Builder mBuilder;
private NotificationManager mNotificationManager;
private RemoteViews mRemoteViews;
private Notification mNotification;
...
@SuppressWarnings("deprecation")
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// setup the notification first
setUpNotification();
/* For example, you want to update notification after 5 seconds.
Then, you call below method to update it:
updateNotification(); */
return START_STICKY;
}
private void setUpNotification(){
mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// we need to build a basic notification first, then update it
Intent intentNotif = new Intent(this, MainActivity.class);
intentNotif.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendIntent = PendingIntent.getActivity(this, 0, intentNotif, PendingIntent.FLAG_UPDATE_CURRENT);
// notification's layout
mRemoteViews = new RemoteViews(getPackageName(), R.layout.custom_notification_small);
// notification's icon
mRemoteViews.setImageViewResource(R.id.notif_icon, R.drawable.ic_launcher);
// notification's title
mRemoteViews.setTextViewText(R.id.notif_title, getResources().getString(R.string.app_name));
// notification's content
mRemoteViews.setTextViewText(R.id.notif_content, getResources().getString(R.string.content_text));
mBuilder = new NotificationCompat.Builder(this);
CharSequence ticker = getResources().getString(R.string.ticker_text);
int apiVersion = Build.VERSION.SDK_INT;
if (apiVersion < VERSION_CODES.HONEYCOMB) {
mNotification = new Notification(R.drawable.ic_launcher, ticker, System.currentTimeMillis());
mNotification.contentView = mRemoteViews;
mNotification.contentIntent = pendIntent;
mNotification.flags |= Notification.FLAG_NO_CLEAR; //Do not clear the notification
mNotification.defaults |= Notification.DEFAULT_LIGHTS;
// starting service with notification in foreground mode
startForeground(NOTIF_ID, mNotification);
}else if (apiVersion >= VERSION_CODES.HONEYCOMB) {
mBuilder.setSmallIcon(R.drawable.ic_launcher)
.setAutoCancel(false)
.setOngoing(true)
.setContentIntent(pendIntent)
.setContent(mRemoteViews)
.setTicker(ticker);
// starting service with notification in foreground mode
startForeground(NOTIF_ID, mBuilder.build());
}
}
// use this method to update the Notification's UI
private void updateNotification(){
int api = Build.VERSION.SDK_INT;
// update the icon
mRemoteViews.setImageViewResource(R.id.notif_icon, R.drawable.icon_off2);
// update the title
mRemoteViews.setTextViewText(R.id.notif_title, getResources().getString(R.string.new_title));
// update the content
mRemoteViews.setTextViewText(R.id.notif_content, getResources().getString(R.string.new_content_text));
// update the notification
if (api < VERSION_CODES.HONEYCOMB) {
mNotificationManager.notify(NOTIF_ID, mNotification);
}else if (api >= VERSION_CODES.HONEYCOMB) {
mNotificationManager.notify(NOTIF_ID, mBuilder.build());
}
}
布局的通知，即 RES /布局/ custom_notification_small.xml ：
<!-- We have to set the height to 64dp, this is the rule of the small notification -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="64dp"
android:orientation="horizontal"
android:id="@+id/notif_small"
android:background="@drawable/notification_background">
<ImageView
android:id="@+id/notif_icon"
android:contentDescription="@string/notif_small_desc"
android:layout_width="47dp"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:src="@drawable/ic_launcher"
android:layout_marginLeft="7dp"
android:layout_marginRight="9dp"/>
<TextView
android:id="@+id/notif_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/notif_icon"
android:singleLine="true"
android:paddingTop="8dp"
android:textSize="17sp"
android:textStyle="bold"
android:textColor="#000000"
android:text="@string/app_name"/>
<TextView
android:id="@+id/notif_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/notif_icon"
android:paddingBottom="9dp"
android:layout_alignParentBottom="true"
android:singleLine="true"
android:textSize="13sp"
android:textColor="#575757"
android:text="Content" />
</RelativeLayout>
希望这个例子可以帮助你很多！
Hope this example helps you a lot!
注：您无法更新pre-蜂窝定制 NotificationCompat ，所以我加在pre-蜂窝更新它的另一种方式，即先检查API级别，并使用日precated 通知代替。
NOTE: You can't update the custom NotificationCompat on pre-Honeycomb, so I added an alternative way to update it on pre-Honeycomb, i.e. checking the API level first and use the deprecated Notification instead.
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