Manifest merger failed : uses-sdk:minSdkVersion 21 cannot be smaller than version 24

如题，如果使用android studio中出现了

Manifest merger failed : uses-sdk:minSdkVersion 21 cannot be smaller than version 24 declared in library [:share] D:\work\project\location-android\share\build\intermediates\library_manifest\debug\AndroidManifest.xml as the library might be using APIs not available in 21
	Suggestion: use a compatible library with a minSdk of at most 21,
		or increase this project's minSdk version to at least 24,
		or use tools:overrideLibrary="touchair.demo.share" to force usage (may lead to runtime failures)

说明其中有一些gradle中的minSdkVersion小于了24，也就是小于了整个项目允许的最小sdkVersion，所以就打开所有的build.gradle，然后看minSdkVersion是否等于24，如果不是，那么改成24，就OK了。