What does it mean by “Manifest merger failed : use

问题:

when start a project i get this error in android studio

Error:Execution failed for task ':app:processDebugManifest'. Manifest merger failed : uses-sdk:minSdkVersion 9 cannot be smaller than version 14 declared in library [com.android.support:appcompat-v7:26.0.0-alpha1] C:\Users\max.android\build-cache\794d310f97f0ec38ea2a53aafb733961774fb930\output\AndroidManifest.xml Suggestion: use tools:overrideLibrary="android.support.v7.appcompat" to force usage

回答1:

It means that Your project uses library with minimum SDK 14 and in Your app You've set it to 9. Minimum SDK for the main project and libraries should be same.

回答2:

you can resolve this problem by just changing minSdkVersion from 9 to 14 in build.gradle(Module app) file of your app and then sync the project