Emergency Alerts: Loading New Themes

[englehorn]

There are some issues with the way new themes are loading in the Android app. The MainActivity.kt getTheme() method is called before the views are instantiated in the onCreate() method. This results in the AndroidManifest.xml default theme and styles being loaded the first time a new EventStatus.js file is detected.

One solution is to check the app themeId and event status shared preferences themeId for a match when a new event is detected. If there is a match then display the correct themed alert banner. This will work, however, it requires an additional loading of the application.

MainActivity.kt

Example Code:

 // handle event banner
        eventViewModel = ViewModelProvider(this, viewModelFactory).get(EventBannerViewModel::class.java)
        eventViewModel.eventStatus.observe(this, Observer { eventResponse ->
            eventResponse.data?.let {

                val settings = PreferenceManager.getDefaultSharedPreferences(this)
                val themeId = settings.getInt(getString(R.string.pref_key_theme), 0)
                val editor = settings.edit()

                editor.putInt(getString(R.string.pref_key_theme), it.themeId)
                editor.putString(getString(R.string.pref_key_current_event), it.title)
                editor.commit()

                if (TimeUtils.currentDateInRange(it.startDate, it.endDate, "yyyy-MM-dd")) {

                    eventTitle = it.title

                    if (it.themeId == themeId) {
                        navView.menu.setGroupVisible(R.id.event_banner_group, true)
                        navView.menu.findItem(R.id.event_banner).actionView.findViewById<TextView>(R.id.event_banner_text).text =
                            it.bannerText

                    }


                } else {
                    navView.menu.setGroupVisible(R.id.event_banner_group, false)

                    editor.putString(getString(R.string.pref_key_last_seen_event), "")
                    editor.putString(getString(R.string.pref_key_current_event), "")
                    editor.putInt(getString(R.string.pref_key_theme), 0)
                    editor.apply()
                }
            }
        })

        notificationsViewModel = ViewModelProvider(this, viewModelFactory).get(
            NotificationsViewModel::class.java
        )

        notificationsViewModel.topics.observe(this, Observer { topics ->
            topics.data?.let {
                for (topic in it) {
                    notificationsViewModel.updateSubscription(
                        topic.topic,
                        topic.subscribed
                    )
                }
            }
        })

Originally posted by @englehorn in #149 (comment)