Make the searchbar use the full available width (#7944)

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

@@ -6,6 +6,6 @@
             android:id="@+id/action_search"
             android:icon="@drawable/ic_search"
             app:showAsAction="collapseActionView|always"
-            app:actionViewClass="androidx.appcompat.widget.SearchView"
+            app:actionViewClass="de.danoeh.antennapod.ui.common.CollapsibleSearchView"
             android:title="@string/search_label"/>
 </menu>

ui/common/src/main/java/de/danoeh/antennapod/ui/common/CollapsibleSearchView.java

@@ -0,0 +1,37 @@
+package de.danoeh.antennapod.ui.common;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.CollapsibleActionView;
+import android.view.ViewGroup;
+
+import androidx.appcompat.widget.SearchView;
+
+/**
+ * A SearchView implementation that can be used as an expanded action view.
+ * It overrides the default behavior to take the full width of the screen.
+ */
+public class CollapsibleSearchView extends SearchView implements CollapsibleActionView {
+    public CollapsibleSearchView(Context context) {
+        super(context);
+    }
+
+    public CollapsibleSearchView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public CollapsibleSearchView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @Override
+    public void onActionViewExpanded() {
+        super.onActionViewExpanded();
+        ViewGroup.LayoutParams params = getLayoutParams();
+        if (params != null) {
+            params.width = ViewGroup.LayoutParams.MATCH_PARENT;
+            setLayoutParams(params);
+        }
+        setIconifiedByDefault(false);
+    }
+}

ui/discovery/src/main/res/menu/online_search.xml

@@ -6,7 +6,7 @@
         android:id="@+id/action_search"
         android:icon="@drawable/ic_search"
         custom:showAsAction="collapseActionView|ifRoom"
-        custom:actionViewClass="androidx.appcompat.widget.SearchView"
+        custom:actionViewClass="de.danoeh.antennapod.ui.common.CollapsibleSearchView"
         android:title="@string/search_label"/>
 
 </menu>