1.targetSdkVersion <= dependencies.compile==compileSdkVersion <= buildToolsVersion
2.dependencies.compile <= Android SDK Manager--SDK Tools的Android SDK Tools
3.Android SDK Manager--SDK Tools的Android SDK Tools 没有大于27的,尽量不要用27
1.targetSdkVersion <= dependencies.compile==compileSdkVersion <= buildToolsVersion
2.dependencies.compile <= Android SDK Manager--SDK Tools的Android SDK Tools
3.Android SDK Manager--SDK Tools的Android SDK Tools 没有大于27的,尽量不要用27