自定义通知栏显示不全、heads-up通知栏的应用

首先是自定义显示不全的问题，通常是设置removeview的方法不对
通过builder.setContent(remoteViews);给通知添加自定义界面，结果由于自定义界面布局过高，底部界面被压缩显示。
用.setCustomBigContentView(mRemoteViews)
setContent 设置普通视图，高度限制为 64 dp
setCustomContentView设置普通视图，高度限制为 64 dp
setCustomBigContentView() 设置扩展视图，高度可以扩展到256dp
setCustomHeadsUpContentView() 设置浮动通知视图

悬浮通知栏的应用（heads-up）：

      Intent intent = new Intent(context, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 100, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        final NotificationCompat.Builder builder;
        builder = new NotificationCompat.Builder(context, HEAD_CHANEL_ID)
                .setSmallIcon(R.mipmap.notification_small_icon)
                .setContentIntent(pendingIntent)
                .setCustomHeadsUpContentView(bigRemoteViews)
                .setContent(remoteViews)
                .setPriority(NotificationCompat.PRIORITY_MAX)
                .setCategory(NotificationCompat.CATEGORY_CALL)
                .setDefaults(android.app.Notification.DEFAULT_ALL)
                .setAutoCancel(true)
                // Use a full-screen intent only for the highest-priority alerts where you
                // have an associated activity that you would like to launch after the user
                // interacts with the notification. Also, if your app targets Android 10
                // or higher, you need to request the USE_FULL_SCREEN_INTENT permission in
                // order for the platform to invoke this notification.
                .setFullScreenIntent(pendingIntent, true);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel(HEAD_CHANEL_ID, HEAD_CHANEL_NAME, NotificationManager.IMPORTANCE_MAX);
            notificationManager.createNotificationChannel(channel);
            builder.setChannelId(HEAD_CHANEL_ID);
            builder.setContentTitle(HEAD_CHANEL_NAME);
        }
        notificationManager.notify(BIG_INTERCEPTION, builder.build());
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记得，不同功能的通知栏的channelid和name不要重复，否则会弹不出来，比如常驻和提示通知栏用了一个，因为常驻先出来了，所以提示通知栏就不展示…

这里是用了32版本的代码，建议as升到Chipmunk以上使用，大家的代码还是要实时更新的呀~
今天的分享就在这了~嘿嘿