Honeycomb notifications - How to set largeIcon to the right size?

android android-3.0-honeycomb android-notifications
Ollie C picture Ollie C · Aug 28, 2011 · Viewed 17.6k times · Source

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.

Answer

crafty picture crafty · Aug 28, 2011

Not had a chance to check it yet but API 11 introduced the following public dimens:

Should be able to use those to scale your image before setting it on the notification.

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