google play - How to change Android version and code version number?

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How to change Android version and code
version number Android Studio? I want to change apk file (app) on Google Play and I need
to change Android version and code version number. I tried with this in
AndroidManifest.xml file in Android
Studio:

            xmlns:android="http://schemas.android.com/apk/res/android"
package="com.bestsoftcorporation.circle.app"

android:versionCode="101"
android:versionName="2.0">

But
it does not work. When I tried to publish it on Google Play it display that I must to
change Android version name and code.

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class="normal">Answer

Go in the
build.gradle and set the version code and name inside the
defaultConfig
element

defaultConfig {

            minSdkVersion 9

 targetSdkVersion 19
 versionCode
            1
 versionName
            "1.0"
}

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