Find a safe Minecraft texture website and download a pack meant for version 1.8.8. It must be a .zip file. Do not unzip it.
Just tested resource packs in Eaglercraft 1.8.8 (the browser-based Minecraft clone). Here's what works: eaglercraft 188 resource packs work
To ensure the best, smoothest experience, focus on these types of packs: Find a safe Minecraft texture website and download
Note that some versions of the debug desktop runtime may not support sounds in resource packs, but textures should work fine 1.2.2. eaglercraft 188 resource packs work
For a resource pack to be recognized by Eaglercraft 1.8.8, it must contain: pack.mcmeta
: Click the Import or Open button (depending on your specific Eaglercraft client) to select the .zip file from your device.