Error:Execution failed for task ':app:lintVitalRelease'.> Lint found fatal errors while assembling a release target.To proceed, either fix the issues identified by lint, or modify your build script as follows:...android {    lintOptions {        checkReleaseBuilds false        // Or, if you prefer, you can continue to check for errors in release builds,        // but continue the build even when errors are found:        abortOnError false    }}...
 

解決方法： 
在app的build.gradle裡的android{}中新增如下程式碼,然後再次執行Generate Signed Apk。例如：

android{
    lintOptions {
        checkReleaseBuilds false
        abortOnError false
    }
}