Error: failed to find target with hash string 'android-21'

Question

I want to change my compileSdkVersion from 23 to 21.So I have made following changes in the build.gradle but I am getting following error.How can I resolve this?

Answer 1

You are using

 compile 'com.android.support:appcompat-v7:23.0.1'

So you have to compile with API 23.
Change your compileSdkVersion in your build.gradle file

 compileSdkVersion 23