Add collapsing toolbar fab action in menu after total layout collapse

app/src/main/java/com/readrops/app/ItemActivity.java

@@ -45,6 +45,7 @@ public class ItemActivity extends AppCompatActivity {
 
     private ItemWithFeed itemWithFeed;
 
+    private boolean appBarCollapsed;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -93,12 +94,21 @@ public class ItemActivity extends AppCompatActivity {
                     .into(imageView);
         }
 
+        appBarLayout.addOnOffsetChangedListener(((appBarLayout1, i) -> {
+            if (Math.abs(i) >= (appBarLayout.getTotalScrollRange() - ((5 * appBarLayout.getTotalScrollRange()) / 100))) {
+                appBarCollapsed = true;
+                invalidateOptionsMenu();
+            } else {
+                appBarCollapsed = false;
+                invalidateOptionsMenu();
+            }
+        }));
+
         viewModel = ViewModelProvider.AndroidViewModelFactory.getInstance(getApplication()).create(ItemViewModel.class);
         viewModel.getItemById(itemId).observe(this, this::bindUI);
 
         actionButton.setOnClickListener(v -> {
-            Intent urlIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(itemWithFeed.getItem().getLink()));
-            startActivity(urlIntent);
+            openLink();
         });
     }
 
@@ -155,19 +165,40 @@ public class ItemActivity extends AppCompatActivity {
     public boolean onCreateOptionsMenu(Menu menu) {
         getMenuInflater().inflate(R.menu.item_menu, menu);
 
+
         return true;
     }
 
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        MenuItem item = menu.findItem(R.id.item_open);
+
+        if (appBarCollapsed)
+            item.setVisible(true);
+        else
+            item.setVisible(false);
+
+        return super.onPrepareOptionsMenu(menu);
+    }
+
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
             case R.id.item_share:
                 shareArticle();
                 return true;
+            case R.id.item_open:
+                openLink();
+                return true;
         }
         return super.onOptionsItemSelected(item);
     }
 
+    private void openLink() {
+        Intent urlIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(itemWithFeed.getItem().getLink()));
+        startActivity(urlIntent);
+    }
+
     private void shareArticle() {
         Intent shareIntent = new Intent(Intent.ACTION_SEND);
         shareIntent.setType("text/plain");

app/src/main/res/menu/item_menu.xml

@@ -2,6 +2,12 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
+    <item
+        android:id="@+id/item_open"
+        android:title="@string/open_url"
+        android:icon="@drawable/ic_open_in_browser_white"
+        app:showAsAction="ifRoom"/>
+
     <item
         android:id="@+id/item_share"
         android:title="@string/share"
@@ -9,4 +15,6 @@
         app:showAsAction="ifRoom" />
 
 
+
+
 </menu>

app/src/main/res/values-fr-rFR/strings.xml

@@ -21,5 +21,6 @@
     <string name="read_time_lower_than_1">Moins d\'une minute</string>
     <string name="read_time_one_minute">1 min</string>
     <string name="share">Partager l\'article</string>
+    <string name="open_url">Ouvrir le lien</string>
 
 </resources>

app/src/main/res/values/strings.xml

@@ -23,4 +23,5 @@
     <string name="read_time_one_minute">1 min</string>
     <string name="interpoint" translatable="false">·</string>
     <string name="share">Share Article</string>
+    <string name="open_url">Open url</string>
 </resources>