Execution failed for task ':app:mergeDebugResources'.
Error: org.gradle.process.internal.ExecException: A problem occurred starting process 'command '/opt/sdk/build-tools/19.1.0/aapt''
Error:Execution failed for task ':app:mergeDebugResources'.
Error: org.gradle.process.internal.ExecException: A problem occurred starting process 'command '/opt/sdk/build-tools/19.1.0/aapt''
我用的是1.5版本的android studio ,出现这样的问题我应该怎么修复他