蜂窝通知 - 如何将largeIcon设置为正确的大小？

发布于 2024-12-02 07:21:43 字数 556 浏览 7 评论 0原文

我发现自己很好奇为什么Notification.Builder 上的setLargeIcon 方法只接受Bitmap，没有重载来提供资源id。也许这是出于性能原因，但这似乎很奇怪，因为 setSmallIcon 确实接受 res drawable id。

Notification.Builder builder = new Notification.Builder(application);
// ....
builder.setLargeIcon(iconBitmap);  // Requires a Bitmap
builder.setSmallIcon(iconResId);   // Requires a drawable resource ID
Notification notification = builder.getNotification();

遗憾的是，提供的位图在通知中未缩放，因此需要为通知视图提供完全正确的尺寸。

假设我需要提供 LargeIcon 位图的 xhdpi、hdpi、mdpi 和 ldpi 版本，它们需要多大尺寸？我在文档中或在更广泛的网络上搜索后看不到任何提及。

原文

I find myself curious why the setLargeIcon method on Notification.Builder only accepts a Bitmap, with no overload to provide a resource id. Perhaps it was done for performance reasons, but it seems odd as setSmallIcon does accept a res drawable id.

Notification.Builder builder = new Notification.Builder(application);
// ....
builder.setLargeIcon(iconBitmap);  // Requires a Bitmap
builder.setSmallIcon(iconResId);   // Requires a drawable resource ID
Notification notification = builder.getNotification();

Sadly the bitmap provided is not scaled in the notification, so the Bitmap needs to be provided exactly the right size for the notification view.

Assuming I need to provide xhdpi, hdpi, mdpi and ldpi versions of the largeIcon bitmap, what sizes do they need to be? I can see no mention in the docs, or after scouring the wider web.

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无语# 2024-12-09 07:21:43

还没有机会检查它，但 API 11 引入了以下公共尺寸：

应该可以在将其设置在通知上之前使用它们来缩放图像。

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墨落成白 2024-12-09 07:21:43

我使用通知大图标的尺寸创建缩放位图

BitmapDrawable contactPicDrawable = (BitmapDrawable) ContactsUtils.getContactPic(mContext, contactId);
Bitmap contactPic = contactPicDrawable.getBitmap();

Resources res = mContext.getResources();
int height = (int) res.getDimension(android.R.dimen.notification_large_icon_height);
int width = (int) res.getDimension(android.R.dimen.notification_large_icon_width);
contactPic = Bitmap.createScaledBitmap(contactPic, width, height, false);

然后我设置带有此缩放位图的大图标。

I used the dimensions of the notification's large icon to create a scaled bitmap

BitmapDrawable contactPicDrawable = (BitmapDrawable) ContactsUtils.getContactPic(mContext, contactId);
Bitmap contactPic = contactPicDrawable.getBitmap();

Resources res = mContext.getResources();
int height = (int) res.getDimension(android.R.dimen.notification_large_icon_height);
int width = (int) res.getDimension(android.R.dimen.notification_large_icon_width);
contactPic = Bitmap.createScaledBitmap(contactPic, width, height, false);

And then I set the large icon with this scaled bitamp.

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