Batch getting many bitmap resources on Android
Solution 1
Use getResources().getIdentifier()
from your Context
(e.g., Activity
), but please cache the result if you will use it more than once. getIdentifier()
is implemented on Resources
.
Solution 2
I know you've found an answer already, but if you use reflection then you will see a good speed increase, as getIdentifier() is slower. I wrote about how to do the reflection method here. However, this only works if you're accessing your own resources.
Solution 3
Reflection is also very slow, you should just create an array with all of your identifies in it.
Brian
I like to write computer programs. I also like backpacking, bike riding, math, natural languages, books, and learning new things. Utah is the most beautiful place on Earth. I have ascended characters from every race and class in Nethack. [email protected]
Updated on June 18, 2022Comments
-
Brian almost 2 years
I have a long series of graphics -- icon1_0.png, icon1_1.png, icon1_2.png..., icon12_0.png, icon12_1.png, icon12_2.png -- and I'd like to package them with my android application. Ideally I think I should be able to load them as resources but the resource id's are set up as java identifiers. Of course, java identifiers can't be assembled at runtime. I have to ask for R.drawable.icon12_00 so I cannot set up a loop
for(int icon=0;icon<12;icon++) for(int frame=0;frame<3;frame++) //syntax error obviously BitmapFactory.decodeResource(getResources(), R.drawable."icon" + icon + "_" + frame + ".png");
So is there any way to get resources by their names? Better yet, is there a canonical way outside the resource system to pack data files into an android application package so that I can get at them?
I'm thinking about reflection but that doesn't seem like the right solution to me.