Caused by: org.gradle.tooling.BuildException: Failed to read key from keystore 
    at com.android.build.gradle.tasks.PackageApplication.doFullTaskAction(PackageApplication.groovy:110) 
    at com.android.build.gradle.internal.tasks.IncrementalTask.taskAction(IncrementalTask.groovy:64) 
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63) 
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.doExecute(AnnotationProcessingTaskFactor 
y.java:235) 
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.jav 
a:211) 
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.execute(AnnotationProcessingTaskFactory. 
java:222) 
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.jav 
a:200) 
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80) 
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61) 
    ... 47 more 
Caused by: com.android.builder.packaging.SigningException: Failed to read key from keystore 
    at com.android.builder.core.AndroidBuilder.packageApk(AndroidBuilder.java:1468) 
    at com.android.builder.core.AndroidBuilder$packageApk$6.call(Unknown Source) 
    at com.android.build.gradle.tasks.PackageApplication.doFullTaskAction(PackageApplication.groovy:95) 
    ... 55 more 

signingConfigs { 
  robert { 
    storePassword 'robert' 
    storeFile file('/Users/bournewang/Documents/Project/android.keystore') 
    keyPassword 'robert' 
    keyAlias 'mike' 
  } 
} 

Check your keystore file for first, in you example you creating file with 
name my-release-key.keystore. If its correct and really present in folder 
Users/bournewang/Documents/Project check alias, in your example it is -alias alias_name,
 but in config you specified alias mike

To find out what's wrong you can use gradle's singingReport command. 
 
On mac: 
 
./gradlew signingReport 
On Windows: 
 
gradle signingReport