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

Just check android home environment variable, it should be : path/../path/sdk and not : path/.../path/sdk/tools example: android home path is : /home/username/android/sdk you should put the following lines to .bashrc file in user home directory:

 ANDROID_HOME='/home/username/android/sdk'
 PATH="$HOME:$HOME/bin:$ANDROID_HOME/tools:$PATH"
 export ANDROID_HOME
 export PATH