Android不同版本下Notification创建方法-白红宇

Android不同版本下Notification创建方法

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发布时间：2019-06-25

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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：

1 /** 2 * Constructs a Notification object with the information needed to 3 * have a status bar icon without the standard expanded view. 4 * 5 * @param icon The resource id of the icon to put in the status bar. 6 * @param tickerText The text that flows by in the status bar when the notification first 7 * activates. 8 * @param when The time to show in the time field. In the System.currentTimeMillis 9 * timebase.10 *11 * @deprecated Use {
    @link Builder} instead.12 */13 @Deprecated14 public Notification(int icon, CharSequence tickerText, long when)15 {16 　　this.icon = icon;17 　　this.tickerText = tickerText;18 　　this.when = when;19 }

　　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。

1 Intent  intent = new Intent(this,MainActivity);  2 PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_ONE_SHOT);  3 notification.setLatestEventInfo(context, title, message, pendingIntent);          4 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。

1 Notification.Builder builder = new Notification.Builder(context)  2             .setAutoCancel(true)  3             .setContentTitle("title")  4             .setContentText("describe")  5             .setContentIntent(pendingIntent)  6             .setSmallIcon(R.drawable.ic_launcher)  7             .setWhen(System.currentTimeMillis())  8             .setOngoing(true);  9 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。

1 Notification notification = new Notification.Builder(context)    2          .setAutoCancel(true)    3          .setContentTitle("title")    4          .setContentText("describe")    5          .setContentIntent(pendingIntent)    6          .setSmallIcon(R.drawable.ic_launcher)    7          .setWhen(System.currentTimeMillis())    8          .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：

1 /** 2 * Sets the {
    @link #contentView} field to be a view with the standard "Latest Event" 3 * layout. 4 * 5 * Uses the {
    @link #icon} and {
    @link #when} fields to set the icon and time fields 6 * in the view.
 7 * @param context The context for your application / activity. 8 * @param contentTitle The title that goes in the expanded entry. 9 * @param contentText The text that goes in the expanded entry.10 * @param contentIntent The intent to launch when the user clicks the expanded notification.11 * If this is an activity, it must include the12 * {
    @link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires13 * that you take care of task management as described in the14 * Tasks and Back15 * Stack document.16 *17 * @deprecated Use {
    @link Builder} instead.18 * @removed19 */20 @Deprecated21 22 public void setLatestEventInfo(Context context,23 CharSequence contentTitle, CharSequence contentText, PendingIntent contentIntent) {24 Notification.Builder builder = new Notification.Builder(context);25 26 // First, ensure that key pieces of information that may have been set directly27 // are preserved28 builder.setWhen(this.when);29 builder.setSmallIcon(this.icon);30 builder.setPriority(this.priority);31 builder.setTicker(this.tickerText);32 builder.setNumber(this.number);33 builder.setColor(this.color);34 builder.mFlags = this.flags;35 builder.setSound(this.sound, this.audioStreamType);36 builder.setDefaults(this.defaults);37 builder.setVibrate(this.vibrate);38 builder.setDeleteIntent(this.deleteIntent);39 40 // now apply the latestEventInfo fields41 if (contentTitle != null) {42 builder.setContentTitle(contentTitle);43 }44 if (contentText != null) {45 builder.setContentText(contentText);46 }47 builder.setContentIntent(contentIntent);48 builder.buildInto(this);49 }

setLatestEventInfo方法已被removed。

转载于:https://www.cnblogs.com/arture/p/5523695.html

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