问题：
E:\DispatchDemo\app\src\main\res\values\styles.xml Information:BUILD FAILED Error:(4, 5) No resource found that matches the given name: attr 'colorAccent'. Error:(4, 5) No resource found that matches the given name: attr 'colorPrimary'. Error:(4, 5) No resource found that matches the given name: attr 'colorPrimaryDark'. Error:Execution failed for task ':app:processDebugResources'. > com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'F:\AndroidStudioSDK\android-studio-sdk\build-tools\21.1.2\aapt.exe'' finished with non-zero exit value 1
原因：
app下，build.gradle文件中compileSdkVersion为
compileSdkVersion 21
但是v7包依赖为
compile 'com.android.support:appcompat-v7:19.+'
解决方法：
将v7依赖包改为
compile 'com.android.support:appcompat-v7:21.+'
