If you want to play San Andreas on your mobile device, there are more reliable methods than using a PSP emulator:

. This version is optimized for mobile touchscreens and modern hardware. PS2 Emulation:

Officially released on the PSP. This is the most advanced native PSP Grand Theft Auto game and runs flawlessly on PPSSPP. GTA: Chinatown Wars PPSSPP / Native Android

, fans have created "highly compressed" mods and fan-ports to bring the experience to the emulator. These files are typically distributed as ZIP or 7Z archives that require extraction before they can be played. How to Install GTA San Andreas PPSSPP Mods