converting drawable resource image into bitmap

2018-06-22 17:37:26

I am trying to use the Notification.Builder.setLargeIcon(bitmap) that takes a bitmap image. I have the image I want to use in my drawable folder so how do I convert that to bitmap?

You probably mean Notification.Builder.setLargeIcon(Bitmap) , right? :)

Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.large_icon);
notBuilder.setLargeIcon(largeIcon);

This is a great method of converting resource images into Android Bitmap s.

Drawable myDrawable = getResources().getDrawable(R.drawable.logo);
Bitmap myLogo = ((BitmapDrawable) myDrawable).getBitmap();

由于API 22 getResources().getDrawable()已弃用，因此我们可以使用以下解决方案。

Drawable vectorDrawable = ResourcesCompat.getDrawable(context.getResources(), R.drawable.logo, null);
Bitmap myLogo = ((BitmapDrawable) myDrawable).getBitmap();

Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.my_drawable);

Context可以是您当前的Activity 。

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