Android studio error This support library should not use a lower version (19)

Question

I created the project then error message:

Error:(23, 12) This support library should not use a lower version (19) than the targetSdkVersion (20)

error code is here: compile 'com.android.support:appcompat-v7:19.+'

Answer 1

Change

compile 'com.android.support:appcompat-v7:19.+'

to

compile 'com.android.support:appcompat-v7:20+'

first open SDK Manager and update the support Libary. or change the targetSDKVersion to 19

the filename is 'build.gradle'