Use expanded SearchView in Toolbar instead of an menu option

app/src/main/java/org/koitharu/kotatsu/main/ui/MainActivity.kt

@@ -44,13 +44,12 @@ import org.koitharu.kotatsu.settings.SettingsActivity
 import org.koitharu.kotatsu.settings.onboard.OnboardDialogFragment
 import org.koitharu.kotatsu.tracker.ui.FeedFragment
 import org.koitharu.kotatsu.tracker.work.TrackWorker
-import org.koitharu.kotatsu.utils.ext.getDisplayMessage
-import org.koitharu.kotatsu.utils.ext.navigationItemBackground
-import org.koitharu.kotatsu.utils.ext.resolveDp
+import org.koitharu.kotatsu.utils.ext.*
 
 class MainActivity : BaseActivity<ActivityMainBinding>(),
 	NavigationView.OnNavigationItemSelectedListener,
-	View.OnClickListener, SearchSuggestionListener, MenuItem.OnActionExpandListener {
+	View.OnClickListener, View.OnFocusChangeListener, SearchSuggestionListener,
+	MenuItem.OnActionExpandListener {
 
 	private val viewModel by viewModel<MainViewModel>(mode = LazyThreadSafetyMode.NONE)
 	private val searchSuggestionViewModel by viewModel<SearchSuggestionViewModel>(
@@ -75,6 +74,11 @@ class MainActivity : BaseActivity<ActivityMainBinding>(),
 		binding.drawer.addDrawerListener(drawerToggle)
 		supportActionBar?.setDisplayHomeAsUpEnabled(true)
 
+		binding.searchView.apply {
+			setOnQueryTextFocusChangeListener(this@MainActivity)
+			searchUi = SearchUI.from(this, this@MainActivity)
+		}
+
 		binding.navigationView.apply {
 			val menuView = findViewById<RecyclerView>(com.google.android.material.R.id.design_navigation_view)
 			navHeaderBinding.root.setOnApplyWindowInsetsListener { v, insets ->
@@ -121,21 +125,17 @@ class MainActivity : BaseActivity<ActivityMainBinding>(),
 	}
 
 	override fun onBackPressed() {
-		if (binding.drawer.isDrawerOpen(binding.navigationView)) {
-			binding.drawer.closeDrawer(binding.navigationView)
-		} else {
-			super.onBackPressed()
+		val fragment = supportFragmentManager.findFragmentByTag(TAG_SEARCH)
+		binding.searchView.setQuery(resources.getString(R.string._empty), false)
+		when {
+			binding.drawer.isDrawerOpen(binding.navigationView) -> binding.drawer.closeDrawer(
+				binding.navigationView)
+			fragment != null -> supportFragmentManager.commit {
+				remove(fragment)
+				setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
 			}
+			else -> super.onBackPressed()
 		}
-
-	override fun onCreateOptionsMenu(menu: Menu): Boolean {
-		menuInflater.inflate(R.menu.opt_main, menu)
-		searchUi = menu.findItem(R.id.action_search)?.let { menuItem ->
-			onMenuItemActionCollapse(menuItem)
-			menuItem.setOnActionExpandListener(this)
-			SearchUI.from(menuItem, this)
-		}
-		return super.onCreateOptionsMenu(menu)
 	}
 
 	override fun onOptionsItemSelected(item: MenuItem): Boolean {
@@ -198,6 +198,18 @@ class MainActivity : BaseActivity<ActivityMainBinding>(),
 		}
 	}
 
+	override fun onFocusChange(v: View?, hasFocus: Boolean) {
+		val fragment = supportFragmentManager.findFragmentByTag(TAG_SEARCH)
+		if (v?.id == R.id.searchView && hasFocus) {
+			if (fragment == null) {
+				supportFragmentManager.commit {
+					add(R.id.container, SearchSuggestionFragment.newInstance(), TAG_SEARCH)
+					setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
+				}
+			}
+		}
+	}
+
 	override fun onMangaClick(manga: Manga) {
 		startActivity(DetailsActivity.newIntent(this, manga))
 	}

app/src/main/java/org/koitharu/kotatsu/search/ui/suggestion/SearchUI.kt

@@ -42,10 +42,8 @@ class SearchUI(
 	companion object {
 
 		fun from(
-			menuItem: MenuItem,
+			searchView: SearchView,
 			listener: SearchSuggestionListener,
-		): SearchUI? = (menuItem.actionView as? SearchView)?.let {
-			SearchUI(it, listener)
-		}
+		): SearchUI = SearchUI(searchView, listener)
 	}
 }

app/src/main/res/layout/activity_main.xml

@@ -39,7 +39,19 @@
 					app:layout_scrollFlags="scroll|enterAlways"
 					app:titleTextAppearance="@style/TextAppearance.Kotatsu.PersistentToolbarTitle"
 					app:titleTextColor="?android:colorControlNormal"
-					tools:title="@string/app_name" />
+					android:focusableInTouchMode="true"
+					android:focusable="true"
+					tools:title="@string/app_name">
+
+					<androidx.appcompat.widget.SearchView
+						android:id="@+id/searchView"
+						android:layout_width="match_parent"
+						android:layout_height="wrap_content"
+						app:iconifiedByDefault="false"
+						app:queryHint="@string/search_manga"
+						android:paddingStart="-12dp"/>
+
+				</com.google.android.material.appbar.MaterialToolbar>
 
 			</com.google.android.material.card.MaterialCardView>
 

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

@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu
-	xmlns:android="http://schemas.android.com/apk/res/android"
-	xmlns:app="http://schemas.android.com/apk/res-auto">
-
-	<item
-		android:id="@+id/action_search"
-		android:icon="@drawable/ic_search"
-		android:orderInCategory="0"
-		android:title="@string/search"
-		app:actionViewClass="androidx.appcompat.widget.SearchView"
-		app:showAsAction="always|collapseActionView" />
-
-</menu>