项目环境
Project Build Target：Android 6.0
问题：
使用 new Notification(int icon, CharSequence tickerText, long when)构造函数时，Eclipse却提示：" The constructor Notification(int, CharSequence, long) is deprecated "
源码如下：
/**
* Constructs a Notification object with the information needed to
* have a status bar icon without the standard expanded view.
*
* @param icon The resource id of the icon to put in the status bar.
* @param tickerText The text that flows by in the status bar when the notification first
* activates.
* @param when The time to show in the time field. In the System.currentTimeMillis
* timebase.
*
* @deprecated Use {@link Builder} instead.
*/
@Deprecated
public Notification(int icon, CharSequence tickerText, long when)
{
this.icon = icon;
this.tickerText = tickerText;
this.when = when;
}
在不同的版本下Notification使用有一些不同，涉及到Builder的使用。现在总结如下，希望对以后使用的程序员有所帮助。
低于API Level 11版本，也就是Android 2.3.3以下的系统中，setLatestEventInfo()函数是唯一的实现方法。前面的有关属性设置这里就不再提了，网上资料很多。
Intent intent = new Intent(this,MainActivity); PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_ONE_SHOT); notification.setLatestEventInfo(context, title, message, pendingIntent); manager.notify(id, notification);
高于API Level 11，低于API Level 16 (Android 4.1.2)版本的系统中，可使用Notification.Builder来构造函数。但要使用getNotification()来使notification实现。此时，前面版本在notification中设置的Flags，icon等属性都已经无效，要在builder里面设置。
Notification.Builder builder = new Notification.Builder(context)
.setAutoCancel(true)
.setContentTitle("title")
.setContentText("describe")
.setContentIntent(pendingIntent)
.setSmallIcon(R.drawable.ic_launcher)
.setWhen(System.currentTimeMillis())
.setOngoing(true);
notification=builder.getNotification();
高于API Level 16的版本，就可以用Builder和build()函数来配套的方便使用notification了。
Notification notification = new Notification.Builder(context)
.setAutoCancel(true)
.setContentTitle("title")
.setContentText("describe")
.setContentIntent(pendingIntent)
.setSmallIcon(R.drawable.ic_launcher)
.setWhen(System.currentTimeMillis())
.build();
【注意点】：
在构造notification的时候有很多种写法，但是要注意，用
Notification notification = new Notification();
这种构建方法的时候，一定要加上notification.icon这个设置，不然，程序虽然不会报错，但是会没有效果。
问题：
使用了Notification下的setLatestEventInfo()方法时，Eclipse却提示：“ The method setLatestEventInfo(Context, String, String, PendingIntent) is undefined for the type Notification”！
查看源码：
/**
* Sets the {@link #contentView} field to be a view with the standard "Latest Event"
* layout.
*
* <p>Uses the {@link #icon} and {@link #when} fields to set the icon and time fields
* in the view.</p>
* @param context The context for your application / activity.
* @param contentTitle The title that goes in the expanded entry.
* @param contentText The text that goes in the expanded entry.
* @param contentIntent The intent to launch when the user clicks the expanded notification.
* If this is an activity, it must include the
* {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires
* that you take care of task management as described in the
* <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back
* Stack</a> document.
*
* @deprecated Use {@link Builder} instead.
* @removed
*/
@Deprecated
public void setLatestEventInfo(Context context,
CharSequence contentTitle, CharSequence contentText, PendingIntent contentIntent) {
Notification.Builder builder = new Notification.Builder(context);
// First, ensure that key pieces of information that may have been set directly
// are preserved
builder.setWhen(this.when);
builder.setSmallIcon(this.icon);
builder.setPriority(this.priority);
builder.setTicker(this.tickerText);
builder.setNumber(this.number);
builder.setColor(this.color);
builder.mFlags = this.flags;
builder.setSound(this.sound, this.audioStreamType);
builder.setDefaults(this.defaults);
builder.setVibrate(this.vibrate);
builder.setDeleteIntent(this.deleteIntent);
// now apply the latestEventInfo fields
if (contentTitle != null) {
builder.setContentTitle(contentTitle);
}
if (contentText != null) {
builder.setContentText(contentText);
}
builder.setContentIntent(contentIntent);
builder.buildInto(this);
}
setLatestEventInfo方法已被removed。