Set android:exported to "true"

Author: Ferenc Gerlits

app/src/main/AndroidManifest.xml

@@ -11,7 +11,7 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
 
-        <activity android:name="ferenc_gerlits.hypercube_viewer.MainActivity">
+        <activity android:name="ferenc_gerlits.hypercube_viewer.MainActivity" android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
@@ -20,7 +20,7 @@
 
         <activity
             android:name="ferenc_gerlits.hypercube_viewer.ShowTextActivity"
-            android:parentActivityName=".MainActivity"></activity>
+            android:parentActivityName=".MainActivity" />
     </application>
 
 </manifest>