android模拟器无法启动，找不到apk文件

Can anybody help my problem, when I start a new project it says I got java IOException Error and says something like keystore was tampered or password incorrect. I delete the error by right clicking it and the error was gone, but when I want to start the emulator, the emulator won't start and gives me error : couldn't find the [project's] apk. I know this question has been asked before but i just couldn't help myself to get the problem and ask it again anywayCan anybody help my problem, when I start a new