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MainActivity: auto-refresh on system contact changes (ContentObserver) #555

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MainActivity: auto-refresh on system contact changes (ContentObserver) #555

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38 changes: 38 additions & 0 deletions app/src/main/kotlin/org/fossify/contacts/activities/MainActivity.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -4,10 +4,14 @@ import android.annotation.SuppressLint
import android.content.ActivityNotFoundException
import android.content.Intent
import android.content.pm.ShortcutInfo
import android.database.ContentObserver
import android.graphics.drawable.ColorDrawable
import android.graphics.drawable.Icon
import android.graphics.drawable.LayerDrawable
import android.os.Bundle
import android.os.Handler
import android.os.Looper
import android.provider.ContactsContract
import androidx.viewpager.widget.ViewPager
import me.grantland.widget.AutofitHelper
import org.fossify.commons.databases.ContactsDatabase
Expand Down Expand Up @@ -143,12 +147,14 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {

isFirstResume = false
checkShortcuts()
registerContactObserver()
}

override fun onPause() {
super.onPause()
storeStateVariables()
config.lastUsedViewPagerPage = binding.viewPager.currentItem
unregisterContactObserver()
}

override fun onDestroy() {
Expand All @@ -158,6 +164,38 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
}
}

private val contactObserverHandler = Handler(Looper.getMainLooper())
private val contactReloadRunnable = Runnable {
if (werePermissionsHandled) {
refreshContacts(ALL_TABS_MASK)
}
}
private var contactObserver: ContentObserver? = null

private fun registerContactObserver() {
unregisterContactObserver()
val observer = object : ContentObserver(contactObserverHandler) {
override fun onChange(selfChange: Boolean) {
contactObserverHandler.removeCallbacks(contactReloadRunnable)
contactObserverHandler.postDelayed(contactReloadRunnable, 500)
}
}
runCatching {
contentResolver.registerContentObserver(
ContactsContract.Contacts.CONTENT_URI, true, observer
)
contactObserver = observer
}
}

private fun unregisterContactObserver() {
contactObserverHandler.removeCallbacks(contactReloadRunnable)
contactObserver?.let { observer ->
runCatching { contentResolver.unregisterContentObserver(observer) }
}
contactObserver = null
}

override fun onBackPressedCompat(): Boolean {
return if (binding.mainMenu.isSearchOpen) {
binding.mainMenu.closeSearch()
Expand Down
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