Moved the common toolbar functionality to the BaseFragment

app/src/main/java/org/kiwix/kiwixmobile/webserver/ZimHostFragment.kt

@@ -38,7 +38,7 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
 import androidx.annotation.RequiresApi
-import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.widget.Toolbar
 import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
 import org.kiwix.kiwixmobile.R
@@ -89,6 +89,12 @@ class ZimHostFragment : BaseFragment(), ZimHostCallbacks, ZimHostContract.View {
   private lateinit var serviceConnection: ServiceConnection
   private var dialog: Dialog? = null
   private var activityZimHostBinding: ActivityZimHostBinding? = null
+  override val fragmentTitle: String? by lazy {
+    getString(R.string.menu_wifi_hotspot)
+  }
+  override val fragmentToolbar: Toolbar? by lazy {
+    activityZimHostBinding?.root?.findViewById(R.id.toolbar)
+  }
   private val selectedBooksPath: ArrayList<String>
     get() {
       return booksAdapter.items
@@ -122,7 +128,6 @@ class ZimHostFragment : BaseFragment(), ZimHostCallbacks, ZimHostContract.View {
 
   override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
     super.onViewCreated(view, savedInstanceState)
-    setUpToolbar(view)
 
     bookDelegate =
       BookOnDiskDelegate.BookDelegate(sharedPreferenceUtil, multiSelectAction = ::select)
@@ -389,16 +394,6 @@ class ZimHostFragment : BaseFragment(), ZimHostCallbacks, ZimHostContract.View {
     activityZimHostBinding = null
   }
 
-  private fun setUpToolbar(view: View) {
-    val activity = requireActivity() as AppCompatActivity
-    activity.setSupportActionBar(view.findViewById(R.id.toolbar))
-    activity.supportActionBar?.apply {
-      title = getString(R.string.menu_wifi_hotspot)
-      setHomeButtonEnabled(true)
-      setDisplayHomeAsUpEnabled(true)
-    }
-  }
-
   // Advice user to turn on hotspot manually for API<26
   private fun startHotspotManuallyDialog() {
 

core/src/main/java/org/kiwix/kiwixmobile/core/base/BaseFragment.kt

@@ -19,6 +19,10 @@
 package org.kiwix.kiwixmobile.core.base
 
 import android.content.Context
+import android.os.Bundle
+import android.view.View
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.widget.Toolbar
 import androidx.fragment.app.Fragment
 
 /**
@@ -27,10 +31,35 @@ import androidx.fragment.app.Fragment
 
 abstract class BaseFragment : Fragment() {
 
+  open val fragmentToolbar: Toolbar? = null
+  open val fragmentTitle: String? = null
+
   override fun onAttach(context: Context) {
     super.onAttach(context)
     inject(activity as BaseActivity)
   }
 
   abstract fun inject(baseActivity: BaseActivity)
+
+  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    super.onViewCreated(view, savedInstanceState)
+    setupToolbar()
+  }
+
+  // Setup toolbar to handle back pressed event
+  private fun setupToolbar() {
+    val activity = activity as AppCompatActivity?
+    fragmentToolbar?.apply {
+      activity?.setSupportActionBar(this)
+      setNavigationOnClickListener {
+        activity?.apply {
+          onBackPressedDispatcher.onBackPressed()
+          supportActionBar?.let { actionBar ->
+            actionBar.setDisplayHomeAsUpEnabled(true)
+            fragmentTitle?.let { title = it }
+          }
+        }
+      }
+    }
+  }
 }

core/src/main/java/org/kiwix/kiwixmobile/core/help/HelpFragment.kt

@@ -43,6 +43,10 @@ import org.kiwix.kiwixmobile.core.utils.LanguageUtils.Companion.getCurrentLocale
 abstract class HelpFragment : BaseFragment() {
   private var fragmentHelpBinding: FragmentHelpBinding? = null
   protected open fun rawTitleDescriptionMap(): List<Pair<Int, Int>> = emptyList()
+  override val fragmentToolbar: Toolbar? by lazy {
+    fragmentHelpBinding?.root?.findViewById(R.id.toolbar)
+  }
+  override val fragmentTitle: String? by lazy { getString(R.string.menu_help) }
 
   private val titleDescriptionMap by lazy {
     rawTitleDescriptionMap().associate { (title, description) ->
@@ -61,15 +65,6 @@ abstract class HelpFragment : BaseFragment() {
     fragmentHelpBinding?.activityHelpFeedbackTextView?.setOnClickListener { sendFeedback() }
     fragmentHelpBinding?.activityHelpFeedbackImageView?.setOnClickListener { sendFeedback() }
     fragmentHelpBinding?.diagnosticClickableArea?.setOnClickListener { sendDiagnosticReport() }
-    val toolbar: Toolbar? = fragmentHelpBinding?.root?.findViewById(R.id.toolbar)
-    toolbar?.apply {
-      activity.setSupportActionBar(this)
-      setNavigationOnClickListener { requireActivity().onBackPressedDispatcher.onBackPressed() }
-    }
-    activity.supportActionBar?.let {
-      it.setDisplayHomeAsUpEnabled(true)
-      it.setTitle(R.string.menu_help)
-    }
     fragmentHelpBinding?.activityHelpRecyclerView?.addItemDecoration(
       DividerItemDecoration(activity, DividerItemDecoration.VERTICAL)
     )

core/src/main/java/org/kiwix/kiwixmobile/core/page/PageFragment.kt

@@ -69,6 +69,10 @@ abstract class PageFragment : OnItemClickListener, BaseFragment(), FragmentActiv
   abstract val pageAdapter: PageAdapter
   abstract val switchIsChecked: Boolean
   private var fragmentPageBinding: FragmentPageBinding? = null
+  override val fragmentToolbar: Toolbar? by lazy {
+    fragmentPageBinding?.root?.findViewById(R.id.toolbar)
+  }
+  override val fragmentTitle: String? by lazy { screenTitle }
 
   private val actionModeCallback: ActionMode.Callback =
     object : ActionMode.Callback {
@@ -135,15 +139,6 @@ abstract class PageFragment : OnItemClickListener, BaseFragment(), FragmentActiv
     fragmentPageBinding?.recyclerView?.layoutManager =
       LinearLayoutManager(activity, RecyclerView.VERTICAL, false)
     fragmentPageBinding?.recyclerView?.adapter = pageAdapter
-    val toolbar = fragmentPageBinding?.root?.findViewById<Toolbar>(R.id.toolbar)
-    toolbar?.apply {
-      activity.setSupportActionBar(this)
-      setNavigationOnClickListener { requireActivity().onBackPressedDispatcher.onBackPressed() }
-    }
-    activity.supportActionBar?.apply {
-      setDisplayHomeAsUpEnabled(true)
-      title = screenTitle
-    }
     fragmentPageBinding?.noPage?.text = noItemsString
 
     fragmentPageBinding?.pageSwitch?.text = switchString

core/src/main/java/org/kiwix/kiwixmobile/core/settings/CoreSettingsFragment.kt

@@ -21,7 +21,6 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
 import androidx.fragment.app.Fragment
 import org.kiwix.kiwixmobile.core.R
@@ -31,12 +30,18 @@ import org.kiwix.kiwixmobile.core.databinding.SettingsBinding
 abstract class CoreSettingsFragment : BaseFragment() {
   private lateinit var prefsFragment: Fragment
   private var settingsBinding: SettingsBinding? = null
+  override val fragmentToolbar: Toolbar? by lazy {
+    settingsBinding?.root?.findViewById(R.id.toolbar)
+  }
+  override val fragmentTitle: String? by lazy {
+    getString(R.string.menu_settings)
+  }
+
   override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
     super.onViewCreated(view, savedInstanceState)
     prefsFragment = createPreferenceFragment()
     requireActivity().supportFragmentManager.beginTransaction()
       .replace(R.id.content_frame, prefsFragment).commit()
-    setUpToolbar()
   }
 
   override fun onCreateView(
@@ -50,21 +55,6 @@ abstract class CoreSettingsFragment : BaseFragment() {
 
   protected abstract fun createPreferenceFragment(): Fragment
 
-  private fun setUpToolbar() {
-    val activity = requireActivity() as AppCompatActivity
-    settingsBinding?.root?.findViewById<Toolbar>(R.id.toolbar)?.apply {
-      activity.setSupportActionBar(this)
-      setNavigationOnClickListener {
-        requireActivity().onBackPressedDispatcher.onBackPressed()
-      }
-    }
-    activity.supportActionBar?.apply {
-      title = getString(R.string.menu_settings)
-      setHomeButtonEnabled(true)
-      setDisplayHomeAsUpEnabled(true)
-    }
-  }
-
   override fun onDestroyView() {
     requireActivity().supportFragmentManager.beginTransaction().remove(prefsFragment)
       .commitNowAllowingStateLoss()