为什么android无法找到com.google.gson.Gson

I'm trying to use GSON in my project, but my application is crashing, with logcat saying that com.google.gson.Gson cannot be found. I've put import com.google.gson.Gson on my class files, I have gson in my package explorer, and added it by Right click -> build path -> add libraries. It also shows up in Project->properties->java build path->libraries tab->gson. What have I done wrong?I'm trying to use GSON in my project, but my ap