Table 3. Descriptive indicators of the topics.

Topic name	Rate (%)	Question count	View count	Favorite count	Voting score	Answer count	Accepted answer count
Android studio	4.95	51,325	1,565	0.35	1.80	1.19	0.35
Kotlin	4.45	46,101	1,175	0.30	1.68	1.30	0.52
Arrays	4.42	45,872	817	0.20	0.70	1.34	0.52
Error handling	3.93	40,745	1,575	0.26	1.52	1.23	0.37
Authentication	3.79	39,299	995	0.32	1.36	1.03	0.32
View controller	3.74	38,803	892	0.31	1.19	1.19	0.42
Web view	3.57	37,005	993	0.24	1.03	0.99	0.30
Imaging	3.45	35,748	963	0.30	1.07	1.10	0.38
API requests	3.34	34,644	865	0.20	0.65	1.15	0.41
Flutter	3.34	34,608	1,949	0.40	1.91	1.24	0.42
Project building	3.28	34,002	1,711	0.40	2.13	1.16	0.33
List view	3.07	31,870	819	0.20	0.69	1.23	0.42
Emulator	2.98	30,936	1,417	0.33	1.47	1.08	0.31
Button actions	2.97	30,783	948	0.25	1.03	1.28	0.40
Text settings	2.92	30,280	931	0.22	0.99	1.28	0.42
Casting	2.81	29,172	1,276	0.21	0.97	1.35	0.51
Layout settings	2.80	29,071	1,139	0.27	1.16	1.31	0.46
React-native	2.80	28,990	1,445	0.25	1.35	1.18	0.40
Style-theme	2.78	28,824	1,238	0.28	1.31	1.28	0.43
Event issues	2.77	28,677	877	0.33	1.34	1.03	0.35
App crash	2.69	27,894	744	0.25	1.00	1.08	0.35
Connection	2.62	27,131	971	0.29	1.16	0.92	0.27
File settings	2.48	25,665	1,143	0.25	1.07	1.01	0.34
Fragment activity	2.43	25,202	846	0.22	0.88	1.29	0.40
Navigation bar	2.31	23,939	1,324	0.34	1.39	1.32	0.42
Database tasks	2.16	22,409	839	0.25	0.97	1.19	0.45
Map API	2.12	21,973	1,066	0.32	1.26	1.02	0.33
Notifications	2.10	21,740	1,045	0.29	1.16	0.98	0.30
Firebase	2.07	21,490	665	0.19	0.58	1.09	0.42
Media streaming	2.06	21,353	795	0.30	1.15	0.86	0.28
Functions	1.83	18,948	988	0.23	1.13	1.19	0.45
Threading	1.79	18,576	1,281	0.41	1.76	1.08	0.41
Cloud firestore	1.42	14,721	972	0.25	1.07	1.15	0.45
Xamarin	1.39	14,414	976	0.24	1.07	1.10	0.43
Dialog alerts	1.24	12,810	784	0.22	0.86	1.16	0.38
Testing	1.13	11,665	956	0.27	1.43	1.05	0.36