Why is each window created as a separate application after installation?

Question

Java

After installing the apk, each activity is created as a separate application. The people who wrote this along with me are all right. What to do?

Answer 1

Resolved : in AndroidManifest.xml , this line was removed in the parameter everywhere except the main application window<intent-filter>

<category android:name="android.intent.category.LAUNCHER" />