What is the Android program size limit?

I want to know what is the Android program size limit:

1. M开发者_如何学Cemory size limit for one process?
2. Code size limit for one application?

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I am not sure, but if you go by the presentation of Dan Bornstein, only available memory for apps is 20MB

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1. It seems the default is 16 MB but rooted devices can change that.
2. APK size is limited to 50 MB (per an e-mail I have from Google)