android - 如何在 android Nougat 及以上版本中创建 Notification.contentView？

Question

我使用 Notification.contentView 复制通知 View :

View notificationView = notification.contentView.apply(context, parent);

不幸的是，从版本 N 开始，Notification.contentView 可能为 null 且已弃用，那么如何手动创建 Notification.contentView？

通常我这样创建通知:

NotificationCompat.Builder builder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
builder.setAutoCancel(true)
        .setColor(ContextCompat.getColor(this, R.color.colorAccent))
        .setContentTitle(title)
        .setContentText(text)
        .setDefaults(Notification.DEFAULT_ALL)
        .setWhen(when)
        .setSmallIcon(smallIcon);

那么如果我手动创建contentView，我可以做些什么来映射以上所有设置？
重要提示:我没有调用 setCustomContentView，我想为标准通知重现一个 contentView。

Answer 1

Notification.contentView()

• YES 从android N，这个字段可能是null

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• 通知 View 由 Notification.Builder; 的输入决定Notification.Builder.setCustomContentView(RemoteViews) 可以选择提供自定义 RemoteViews

示例代码

    NotificationManager mNotificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    String NOTIFICATION_CHANNEL_ID = "Nilesh_channel";

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "Your Notifications",
                NotificationManager.IMPORTANCE_HIGH);

        notificationChannel.setDescription("");
        notificationChannel.enableLights(true);
        notificationChannel.enableVibration(true);
        mNotificationManager.createNotificationChannel(notificationChannel);
    }

    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);

    RemoteViews notificationView = new RemoteViews(getPackageName(), R.layout.custom_layout);

    notificationBuilder.setAutoCancel(true)
            .setColor(ContextCompat.getColor(this, R.color.colorAccent))
            .setContentTitle(getString(R.string.app_name))
            .setContentText("")
            .setDefaults(Notification.DEFAULT_ALL)
            .setWhen(System.currentTimeMillis())
            .setSmallIcon(R.drawable.ic_launcher_background)
            .setCustomContentView(notificationView) // set here your RemoteViews
            .setAutoCancel(true);

输出