The moment in which I launch my app with Android Studio on my device, two icons of the same app are created.
I already tried to export the apk and install it but it did not work, keep creating two icons of the same application.
Why does this situation happen? I do not know if you have to configure something in the Android Studio for it.
Check that only one of your Activity defined in AndroidManifest.xml should have the intent-filter defined with action.MAIN and category.LAUNCHER :
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>