在Android的通知中将Drawable或Bitmap设置为图标 [英] Set Drawable or Bitmap as icon In Notification in Android

问题描述

我从服务器下载一个图像作为位图，并将其转换为可绘制对象，现在我想将此可绘制对象用作通知图标.但我无法做到这一点.这是我的代码:

I download a image from server as bitmap and convert it to drawable now i want to use this drawable as notification icon. But i am unable to do that. here is my code:

    Notification notification = new NotificationCompat.Builder(context)

    .setContentTitle(title)

    .setContentText(message)

    .setContentIntent(intent)

    .setSmallIcon(bitmap)

    .setWhen(when)

    .build(); 

但是图标是Resources int值，因此当我使用它时会出错.任何帮助

but icon is a Resources int value so when i used it it gives error. Any help

现在我更新我的代码，现在我正在这样做:

Now i update my code and now i am doing like that :

          Notification notification = new NotificationCompat.Builder(context)

        .setContentTitle(title)

        .setContentText(message)

        .setContentIntent(intent)

        .setSmallIcon(icon)

        .setLargeIcon(bitmap)

        .setWhen(when)

        .build();

，但是在左侧提供大图标，在右侧提供小图标.我不想要这样做，因此我删除了setSmallIcon行并运行我的代码，但未向我显示通知

but it gives large icon on left side and small icon on right side. I don't want this so for this i remove setSmallIcon line and run my code but it not showing me the notifications

推荐答案

如果您阅读特定于 setSmallIcon(int icon) 需要在可绘制应用程序的程序包中使用资源ID .

If you read the developer documents specific to Notification.Builder you will see that setSmallIcon(int icon) needs a A resource ID in the application's package of the drawable to use.

下载图像，转换为位图，然后将其设置为setSmallIcon()仍然会给您带来错误.

Downloading an image, converting to a bitmap and then setting it to the setSmallIcon() is still going to give you an error.

例如，即使您要将Bitmap转换为Drawable，例如:

Even if you were to convert the Bitmap to a Drawable like this for instance:

Drawable d = new BitmapDrawable(getResources(), bmpFinal);

它仍然会给您一个错误，因为Drawable在您的应用程序包中不存在.

it is still going to give you an error because that Drawable does not exist in your application package.

唯一可行的解​​决方案是使用package中存在的Drawable资源并将其设置为setSmallIcon()方法.典型用法:

The only possible solution is to use a Drawable resource that exists in your package and set it to the setSmallIcon() method. Typical usage:

builder.setSmallIcon(R.drawable.ic_launcher);

或者， setLargeIcon (Bitmap icon) 需要一个Bitmap实例.无需在当前代码中进行任何其他更改(因为您已经有一个Bitmap)，可以根据需要使用它.

Alternatively, the setLargeIcon (Bitmap icon) requires a Bitmap instance. Without having to make any additional changes in your current code (since you already have a Bitmap), you can use that as it is, if it fits your requirement.

如果没有，则几乎必须使用drawable文件夹之一中已经存在的Drawable资源.

If not, you pretty much have to use a Drawable resource that is already present in one of the drawable folders.

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