After installing Android Studio.MainActivity.kt is not present.what to do?
Problem in Android Studio
You can add it explicitly. Right click on package name and new -> empty activity and name it as main activity. Also make sure to make activity as launcher activity.
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>