facebook login on android

hi , i read (kasa) thread about cannot login facebook on android device. i have same problem too, when i try too login facbook on unity editor, it works then i try to build and test on android device it appears facebook app permission and its nothing happend again. and i have check key hashes on facebook edit setting and apply it on facebook dev setting, and again its not working. can you help share a solution? sorry my bad english ^^;