android - when using libraries from github shall I add an Apache license somewhere in my app? -


i downloaded few source codes android http://www.java2s.com/open-source/android_free_code/game/list_of_free_code_game.htm see website doesn't state license of these source codes anywhere

i want modify these apps , upload them play store, or sell them, problem don't know if have right or not. above this, when using libraries apache license, don't know whole app considered under license or parts used .


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