Android Notifaction 从4.0到7.0

Android Notifaction 从4.0到7.0

图1 4.0 通知样式



图2 5.0 6.0 通知样式



图3 7.0 通知样式

兼容

这么多版本，如何兼容，没关系，交给

android.support.v7.app.NotificationCompat

基本用法

NotificationManager nm = (NotificationManager) ctx.getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);

通过builder设置notifaction的属性

具体方法见：官方API，国内可用

高级用法

就是这些style

NotificationCompat.BigPictureStyle

NotificationCompat.BigTextStyle

NotificationCompat.InboxStyle

NotificationCompat.MediaStyle

NotificationCompat.DecoratedCustomViewStyle

NotificationCompat.MessagingStyle

小技巧

横幅

两种方式

1.builder.setPriority(Notification.PRIORITY_MAX);

2.builder.setFullScreenIntent(intent,false);

通知无声音、无震动、无LED呼吸灯闪烁

long[] pattern = {0,0};
builder.setVibrate(pattern);
builder.setLights(Color.rgb(0,0,0),0,0);
builder.setSound(null);

异步下载通知里显示的图片

如果你是用glide图片加载框架，那么恭喜你中奖了，今天我介绍的就是glide，同样的Picasso也有类似的方法，用法基本差不多，就不多介绍了

常用的方法要不就是本地图片，要不就是先下载再显示通知，这里我们也说两种

1.直接显示，异步加载通知区域图片

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
// Inflate and set the layout for the expanded notification view
RemoteViews expandedView = new RemoteViews(ctx.getPackageName(), R.layout.notification_expanded);
expandedView.addView(R.id.content_rl, notification.contentView.clone());
notification.bigContentView = expandedView;
NotificationTarget notificationTarget = new NotificationTarget(context.getApplicationContext(), expandedView, R.id.expanded_imageView, notification, id);
Glide.with(context.getApplicationContext()) // safer!
.load(bigPicture)
.asBitmap()
.into(notificationTarget);
}

布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="right|top"
android:orientation="vertical">

<RelativeLayout
android:id="@+id/content_rl"
android:layout_width="match_parent"
android:layout_height="wrap_content"></RelativeLayout>

<ImageView
android:id="@+id/expanded_imageView"
android:layout_width="match_parent"
android:layout_height="152dp"
android:contentDescription="@string/app_name"
android:scaleType="centerCrop" />

2.先下载后显示

重写NotificationTarget，再获取到图片后再显示通知

总有些坑在等你跳

1.设置横幅后，锁屏后解开直接触发通知的PendingIntent事件

builder.setFullScreenIntent(intent,false);

源码

/**
* An intent to launch instead of posting the notification to the status bar.
* Only for use with extremely high-priority notifications demanding the user's
* <strong>immediate</strong> attention, such as an incoming phone call or
* alarm clock that the user has explicitly set to a particular time.
* If this facility is used for something else, please give the user an option
* to turn it off and use a normal notification, as this can be extremely
* disruptive.
*
* <p>
* The system UI may choose to display a heads-up notification, instead of
* launching this intent, while the user is using the device.
* </p>
*
* @param intent The pending intent to launch.
* @param highPriority Passing true will cause this notification to be sent
*          even if other notifications are suppressed.
*
* @see Notification#fullScreenIntent
*/
public Builder setFullScreenIntent(PendingIntent intent, boolean highPriority) {
mFullScreenIntent = intent;
setFlag(FLAG_HIGH_PRIORITY, highPriority);
return this;
}

大概意思就是：设置setFullScreenIntent后，说明这个通知的优先级跟来电话的优先级一样高，会直接显示给你，建议设置开关让用户可以自由选择

因此建议使用设置通知优先级来显示横幅

2.setContentInfo与setContentText

咋一看，貌似区别不大，实际区别如下：

在7.0以上，setContentInfo表示红框区域，setContentText表示黑框区域

/**
* Set the large text at the right-hand side of the notification.
*/
public Builder setContentInfo(CharSequence info) {
mContentInfo = limitCharSequenceLength(info);
return this;
}

/**
* Set the title (first row) of the notification, in a standard notification.
*/
public Builder setContentTitle(CharSequence title) {
mContentTitle = limitCharSequenceLength(title);
return this;
}

/**
* Set the text (second row) of the notification, in a standard notification.
*/
public Builder setContentText(CharSequence text) {
mContentText = limitCharSequenceLength(text);
return this;
}

/**
* Set the third line of text in the platform notification template.
* Don't use if you're also using {@link #setProgress(int, int, boolean)};
* they occupy the same location in the standard template.
* <br>
* If the platform does not provide large-format notifications, this method has no effect.
* The third line of text only appears in expanded view.
* <br>
*/
public Builder setSubText(CharSequence text) {
mSubText = limitCharSequenceLength(text);
return this;
}