🎨 Palette: Improve compose FAB long-press accessibility discoverability

mastodon/src/main/java/de/icod/techidon/fragments/BaseStatusListFragment.java

@@ -20,6 +20,8 @@
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
 import androidx.recyclerview.widget.RecyclerView;
 
 import de.icod.techidon.E;
@@ -238,6 +240,9 @@ protected void onHidden(){
 	protected void onShown(){
 		super.onShown();
 		imgLoader.activate();
+		if (fab != null) {
+			updateFabLongClickAccessibilityAction();
+		}
 	}
 
 	@Override
@@ -556,11 +561,39 @@ public void getSelectorBounds(View view, Rect outRect){
 			fab.setVisibility(View.VISIBLE);
 			fab.setOnClickListener(this::onFabClick);
 			fab.setOnLongClickListener(this::onFabLongClick);
+			updateFabLongClickAccessibilityAction();
 		} else if (fab != null) {
 			fab.setVisibility(View.GONE);
 		}
 	}
 
+	private void updateFabLongClickAccessibilityAction() {
+		if (fab == null)
+			return;
+
+		boolean multipleAccounts = AccountSessionManager.getInstance().getLoggedInAccounts().size() > 1;
+
+		// Only expose a long-click action (including to accessibility services)
+		// when there are multiple accounts to manage.
+		fab.setLongClickable(multipleAccounts);
+
+		if (multipleAccounts) {
+			ViewCompat.replaceAccessibilityAction(
+					fab,
+					AccessibilityNodeInfoCompat.AccessibilityActionCompat.ACTION_LONG_CLICK,
+					getString(R.string.choose_account),
+					null
+			);
+		} else {
+			ViewCompat.replaceAccessibilityAction(
+					fab,
+					AccessibilityNodeInfoCompat.AccessibilityActionCompat.ACTION_LONG_CLICK,
+					null,
+					null
+			);
+		}
+	}
+
 	@Override
 	public void onConfigurationChanged(Configuration newConfig){
 		super.onConfigurationChanged(newConfig);

mastodon/src/main/java/de/icod/techidon/fragments/HomeTabFragment.java

@@ -33,6 +33,8 @@
 import android.widget.Toolbar;
 
 import androidx.annotation.NonNull;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.viewpager2.widget.ViewPager2;
 
@@ -148,6 +150,7 @@ public View onCreateContentView(LayoutInflater inflater, ViewGroup container, Bu
 		fab = view.findViewById(R.id.fab);
 		fab.setOnClickListener(this::onFabClick);
 		fab.setOnLongClickListener(this::onFabLongClick);
+		updateFabLongClickAccessibilityAction();
 		pager = new ViewPager2(getContext());
 		toolbarFrame = (FrameLayout) LayoutInflater.from(getContext()).inflate(R.layout.home_toolbar, getToolbar(), false);
 
@@ -686,10 +689,37 @@ public void onDestroyView(){
 	@Override
 	protected void onShown() {
 		super.onShown();
+		if (fab != null) {
+			updateFabLongClickAccessibilityAction();
+		}
 		Object timelines = AccountSessionManager.get(accountID).getLocalPreferences().timelines;
 		if (timelines != null && timelinesList!= timelines) UiUtils.restartApp();
 	}
 
+	private void updateFabLongClickAccessibilityAction() {
+		if (fab == null)
+			return;
+
+		boolean multipleAccounts = AccountSessionManager.getInstance().getLoggedInAccounts().size() > 1;
+		fab.setLongClickable(multipleAccounts);
+
+		if (multipleAccounts) {
+			ViewCompat.replaceAccessibilityAction(
+					fab,
+					AccessibilityNodeInfoCompat.AccessibilityActionCompat.ACTION_LONG_CLICK,
+					getString(R.string.choose_account),
+					null
+			);
+		} else {
+			ViewCompat.replaceAccessibilityAction(
+					fab,
+					AccessibilityNodeInfoCompat.AccessibilityActionCompat.ACTION_LONG_CLICK,
+					null,
+					null
+			);
+		}
+	}
+
 	@Override
 	public void onViewStateRestored(Bundle savedInstanceState) {
 		super.onViewStateRestored(savedInstanceState);