在build.gradle中引用 butterknife庫時，報出如下錯誤：
錯誤表現：FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:transformClassesWithInstantRunForDebug'.
錯誤原因：這可能是由於butterknife中依賴的v4包引起的
修改前：
exclude group: 'com.android.support'
修改後：
compile('com.jakewharton:butterknife:8.8.1') {
exclude group: 'com.android.support'
}