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Code Issues Projects Releases Wiki Activity

Never wrap RecyclerView with a NestedScrollView

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Wrapping a ``RecyclerView`` with a ``NestedScrollView`` breaks its recycling
functionality because the view height is stretched to fit the full list
of entries.

We never noticed performance issues in these two cases because these
lists never get very long. Let's fix these cases anyway so that we
don't accidentally base a new use of a ``RecyclerView`` on this broken
pattern.

Also renamed ``list_slots`` to ``list_groups``. Must have been
a copy-paste error.
This commit is contained in:
Alexander Bakker 2023-09-09 18:26:40 +02:00
parent dd9c307dea
commit ca4a3e2f74
4 changed files with 16 additions and 45 deletions
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14
app/src/main/java/com/beemdevelopment/aegis/ui/GroupManagerActivity.java
View File

@ -24,7 +24,7 @@ import java.util.Objects;
public class GroupManagerActivity extends AegisActivity implements GroupAdapter.Listener {
private GroupAdapter _adapter;
private HashSet<String> _removedGroups;
private RecyclerView _slotsView;
private RecyclerView _groupsView;
private View _emptyStateView;
private BackPressHandler _backPressHandler;
@ -51,11 +51,11 @@ public class GroupManagerActivity extends AegisActivity implements GroupAdapter.
}
_adapter = new GroupAdapter(this);
_slotsView= findViewById(R.id.list_slots);
_groupsView = findViewById(R.id.list_groups);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
_slotsView.setLayoutManager(layoutManager);
_slotsView.setAdapter(_adapter);
_slotsView.setNestedScrollingEnabled(false);
_groupsView.setLayoutManager(layoutManager);
_groupsView.setAdapter(_adapter);
_groupsView.setNestedScrollingEnabled(false);
for (String group : _vaultManager.getVault().getGroups()) {
_adapter.addGroup(group);
@ -135,10 +135,10 @@ public class GroupManagerActivity extends AegisActivity implements GroupAdapter.
private void updateEmptyState() {
if (_adapter.getItemCount() > 0) {
_slotsView.setVisibility(View.VISIBLE);
_groupsView.setVisibility(View.VISIBLE);
_emptyStateView.setVisibility(View.GONE);
} else {
_slotsView.setVisibility(View.GONE);
_groupsView.setVisibility(View.GONE);
_emptyStateView.setVisibility(View.VISIBLE);
}
}

6
app/src/main/java/com/beemdevelopment/aegis/ui/fragments/preferences/IconPacksManagerFragment.java
View File

@ -44,7 +44,6 @@ public class IconPacksManagerFragment extends Fragment implements IconPackAdapte
@Inject
VaultManager _vaultManager;
private View _iconPacksView;
private RecyclerView _iconPacksRecyclerView;
private IconPackAdapter _adapter;
private LinearLayout _noIconPacksView;
@ -62,7 +61,6 @@ public class IconPacksManagerFragment extends Fragment implements IconPackAdapte
_noIconPacksView = view.findViewById(R.id.vEmptyList);
((TextView) view.findViewById(R.id.txt_no_icon_packs)).setMovementMethod(LinkMovementMethod.getInstance());
_iconPacksView = view.findViewById(R.id.view_icon_packs);
_adapter = new IconPackAdapter(this);
_iconPacksRecyclerView = view.findViewById(R.id.list_icon_packs);
LinearLayoutManager layoutManager = new LinearLayoutManager(requireContext());
@ -169,10 +167,10 @@ public class IconPacksManagerFragment extends Fragment implements IconPackAdapte
private void updateEmptyState() {
if (_adapter.getItemCount() > 0) {
_iconPacksView.setVisibility(View.VISIBLE);
_iconPacksRecyclerView.setVisibility(View.VISIBLE);
_noIconPacksView.setVisibility(View.GONE);
} else {
_iconPacksView.setVisibility(View.GONE);
_iconPacksRecyclerView.setVisibility(View.GONE);
_noIconPacksView.setVisibility(View.VISIBLE);
}
}

20
app/src/main/res/layout/activity_groups.xml
View File

@ -18,23 +18,11 @@
android:background="?attr/colorAppBar" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/list_groups"
android:layout_height="match_parent"
app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/list_slots"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical"/>
</LinearLayout>
</androidx.core.widget.NestedScrollView>
android:layout_width="match_parent"
app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior" />
<LinearLayout
android:layout_width="match_parent"

21
app/src/main/res/layout/fragment_icon_packs.xml
View File

@ -47,26 +47,11 @@
</LinearLayout>
<androidx.core.widget.NestedScrollView
android:id="@+id/view_icon_packs"
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/list_icon_packs"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/list_icon_packs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical"/>
</LinearLayout>
</androidx.core.widget.NestedScrollView>
app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/fab"