【起航计划 026】2015 起航计划 Android APIDemo的魔鬼步伐 25 App->Notification->Status Bar 状态栏显示自定义的通知布局，省却声音、震动

这个例子的Icons Only 和 Icons and marquee 没有什么特别好说明的。
而Use Remote views in balloon 介绍了可以自定义在Extended Status bar显示Notification的Layout，Extended Status Bar缺省显示Notification 是一个图标后接文字，对应大多数情况是够用了。但如果有需要也可以使用自定义的Layout在Extented Status bar显示Notification，方法是通过RemoteView：

private void setMoodView(int moodId, int textId) {
// Instead of the normal constructor, we're going to use the one with no args and fill
// in all of the data ourselves.  The normal one uses the default layout for notifications.
// You probably want that in most cases, but if you want to do something custom, you
// can set the contentView field to your own RemoteViews object.
Notification notif = new Notification();

// This is who should be launched if the user selects our notification.
notif.contentIntent = makeMoodIntent(moodId);

// In this sample, we'll use the same text for the ticker and the expanded notification
CharSequence text = getText(textId);
notif.tickerText = text;

// the icon for the status bar
notif.icon = moodId;

// our custom view
        RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.status_bar_balloon);
contentView.setTextViewText(R.id.text, text);
contentView.setImageViewResource(R.id.icon, moodId);
notif.contentView = contentView;

// we use a string id because is a unique number.  we use it later to cancel the
// notification
mNotificationManager.notify(MOOD_NOTIFICATIONS, notif);
}

为了和缺省的Status Bar Layout有所区别，我们在/res/status_bar_balloon.xml 在增加一个ImageView：左右各显示一个图标，中间为文字。

<LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android”
android:orientation=”horizontal”
android:baselineAligned=”false”
android:gravity=”center_vertical”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”>

<ImageView android:id=”@+id/icon”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:layout_marginRight=”10dip” />
<TextView android:id=”@+id/text”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:textColor=”#ffffffff” />
<ImageView android:id=”@+id/icon1″
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:layout_marginRight=”10dip” />

</LinearLayout>

Use default values where applicable 介绍使用缺省声音，震动或是两者的方法：

int default = Notification.DEFAULT_SOUND;
//Notification.DEFAULT_SOUND
//Notification.DEFAULT_VIBRATE
//Notification.DEFAULT_ALL

notification.defaults = defaults;

注：例子中使用了同样的Notification ID ：R.layout.status_bar_notifications ，因此每次调用mNotificationManager.notify 都会更新同一个Notification。