Android: Question about Bitmaps, memory usage, and scaling

Question

For readibility, I posted the code examples that my solutions refer to first, and thenI listed the explanations of my solutions in a numerical list.

I have been

Answer 1

The right approach is to decode for the size you need to show and subsample the image in tiles when you need to zoom.

There's a library that should do exactly this, check it out: https://github.com/davemorrissey/subsampling-scale-image-view