git 上down下項目后，發現Android Studio報錯：
What went wrong:
java.io.FileNotFoundException: /Users/raomengyang/Documents/workspace/fontmanager/.gradle/2.2.1/taskArtifacts/cache.properties (No such file or directory)
> /Users/raomengyang/Documents/workspace/fontmanager/.gradle/2.2.1/taskArtifacts/cache.properties (No such file or directory)
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
1.項目中local.properties 的sdk.dir= <此處SDK路徑不同需修改>
2. Google一番沒找到問題解決方法，cd 到Users/raomengyang/Documents/workspace/fontmanager/.gradle/2.2.1/ 后發現沒有cache.properties文件，只有一個cache.properties.lock 感覺應該是這個文件被lock上了
➜ / cd Users/xxxxx(Username)/Documents/workspace/fontmanager ➜ fontmanager git:(temp) ✗ ls -a . .gradle actionbarsherlock_new gradle local.properties.bak .. .idea build gradlew local.properties.bak~HEAD .git FontManage build.gradle gradlew.bat settings.gradle .gitignore SliderLib fontmanager.iml local.properties viewpagerindicator ➜ fontmanager git:(temp) ✗ cd .gradle ➜ .gradle git:(temp) ✗ ls 2.2.1 ➜ .gradle git:(temp) ✗ cd 2.2.1/taskArtifacts ➜ taskArtifacts git:(temp) ✗ ls cache.properties.lock fileHashes.bin fileSnapshots.bin outputFileStates.bin taskArtifacts.bin ➜ taskArtifacts git:(temp) ✗ cache.properties.lock
於是cp cache.properties.lock /Users/raomengyang/Desktop
然后把文件的讀取改為everyone 讀寫，並去掉.lock后綴變為cache.properties
再將其cp回去，項目成功運行。
—————————— Update ——————————
后來遇到類似的問題，在退出Android Studio后會提示后台有任務在進行，是否結束，關掉AS，然后重啟即可。