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Code Issues Releases Wiki Activity

Entries list: preserve scroll position when moving back to fragment.

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This commit is contained in:
Tom Hacohen 2020-09-01 13:14:00 +03:00
parent d768ab69cd
commit 73bebcd7c4
1 changed files with 18 additions and 1 deletions
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19
app/src/main/java/com/etesync/syncadapter/ui/etebase/ListEntriesFragment.kt
View File

@ -2,10 +2,14 @@ package com.etesync.syncadapter.ui.etebase
import android.content.Context import android.content.Context
import android.os.Bundle import android.os.Bundle
import android.os.Parcelable
import android.view.LayoutInflater import android.view.LayoutInflater
import android.view.View import android.view.View
import android.view.ViewGroup import android.view.ViewGroup
import android.widget.* import android.widget.AdapterView
import android.widget.ArrayAdapter
import android.widget.ImageView
import android.widget.TextView
import androidx.fragment.app.ListFragment import androidx.fragment.app.ListFragment
import androidx.fragment.app.activityViewModels import androidx.fragment.app.activityViewModels
import androidx.fragment.app.commit import androidx.fragment.app.commit
@ -16,10 +20,12 @@ import com.etesync.syncadapter.R
import java.text.SimpleDateFormat import java.text.SimpleDateFormat
import java.util.concurrent.Future import java.util.concurrent.Future
class ListEntriesFragment : ListFragment(), AdapterView.OnItemClickListener { class ListEntriesFragment : ListFragment(), AdapterView.OnItemClickListener {
private val collectionModel: CollectionViewModel by activityViewModels() private val collectionModel: CollectionViewModel by activityViewModels()
private val itemsModel: ItemsViewModel by activityViewModels() private val itemsModel: ItemsViewModel by activityViewModels()
private var asyncTask: Future<Unit>? = null private var asyncTask: Future<Unit>? = null
private var state: Parcelable? = null
private var emptyTextView: TextView? = null private var emptyTextView: TextView? = null
@ -36,6 +42,8 @@ class ListEntriesFragment : ListFragment(), AdapterView.OnItemClickListener {
override fun onViewCreated(view: View, savedInstanceState: Bundle?) { override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState) super.onViewCreated(view, savedInstanceState)
var restored = false
collectionModel.observe(this) { col -> collectionModel.observe(this) { col ->
itemsModel.observe(this) { itemsModel.observe(this) {
val entries = it.sortedByDescending { item -> val entries = it.sortedByDescending { item ->
@ -46,12 +54,21 @@ class ListEntriesFragment : ListFragment(), AdapterView.OnItemClickListener {
listAdapter.addAll(entries) listAdapter.addAll(entries)
if(!restored && (state != null)) {
listView.onRestoreInstanceState(state)
restored = true
}
emptyTextView!!.text = getString(R.string.journal_entries_list_empty) emptyTextView!!.text = getString(R.string.journal_entries_list_empty)
} }
} }
listView.onItemClickListener = this listView.onItemClickListener = this
} }
override fun onPause() {
state = listView.onSaveInstanceState()
super.onPause()
}
override fun onDestroyView() { override fun onDestroyView() {
super.onDestroyView() super.onDestroyView()