I'm using MapView inside my custom Fragment and I forwarded all life cycle methods to MapView. I have an issue with infinite surface update on tablet (even on tablet emulator: HAXM Nexus 10 API30) but not on any phone. I removed all functions, except necessary for MapView implementation but issue is still present.
This infinite surface update causing issue to RecyclerView adapter because onBindViewHolder is triggered multiple times (~20) by sec.
I want to know how to stop this unexpected behaviour of MapView or atleast limit number of events send to RecyclerView.Adapter.
MapViewFragment:
class MapIssueFragment: Fragment(R.layout.fragment_map), OnMapReadyCallback {
companion object {
private const val TAG = "MapIssueFragment"
fun newInstance(): MapIssueFragment{
return MapIssueFragment()
}
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
Log.i(TAG, "onCreate")
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
Log.i(TAG, "onViewCreated")
map.apply {
onCreate(savedInstanceState)
getMapAsync(this@MapIssueFragment)
}
}
override fun onStart() {
super.onStart()
map.onStart()
Log.i(TAG, "onStart")
}
override fun onResume() {
super.onResume()
map.onResume()
Log.i(TAG, "onResume")
}
override fun onPause() {
super.onPause()
map.onPause()
Log.i(TAG, "onPause")
}
override fun onStop() {
super.onStop()
map.onStop()
Log.i(TAG, "onStop")
}
override fun onDestroy() {
super.onDestroy()
map.onDestroy()
Log.i(TAG, "onDestroy")
}
override fun onSaveInstanceState(outState: Bundle) {
super.onSaveInstanceState(outState)
map.onSaveInstanceState(outState)
Log.i(TAG, "onSaveInstanceState")
}
override fun onLowMemory() {
super.onLowMemory()
map.onLowMemory()
Log.i(TAG, "onLowMemory")
}
private lateinit var googleMap: GoogleMap
override fun onMapReady(googleMap: GoogleMap) {
this.googleMap = googleMap
}
}
fragment_map:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.gms.maps.MapView
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="@id/requirements_container"/>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/requirements_container"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHeight_percent="0.50"
android:visibility="visible"
>
<TextView
android:id="@+id/requirements_empty"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="@string/no_requirements"
android:gravity="center"
android:visibility="gone"
/>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/requirements_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:listitem="@layout/item_requirement_detail"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
Even without RecyclerView adapter I can see error in Logcat where you can see that refresh rate:
2020-10-27 13:47:50.908 E/RecyclerView: No adapter attached; skipping layout
2020-10-27 13:47:50.914 E/RecyclerView: No adapter attached; skipping layout
2020-10-27 13:47:50.963 E/RecyclerView: No adapter attached; skipping layout
2020-10-27 13:47:50.972 E/RecyclerView: No adapter attached; skipping layout
2020-10-27 13:47:51.025 E/RecyclerView: No adapter attached; skipping layout
2020-10-27 13:47:51.029 E/RecyclerView: No adapter attached; skipping layout
2020-10-27 13:47:51.075 E/RecyclerView: No adapter attached; skipping layout
2020-10-27 13:47:51.092 E/RecyclerView: No adapter attached; skipping layout
