kiwix#2717 added addOnScrollListener to hide keyboard in PageFragment.kt and onlineLibraryFragment.kt

app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/OnlineLibraryFragment.kt

@@ -49,11 +49,13 @@ import org.kiwix.kiwixmobile.core.downloader.Downloader
 import org.kiwix.kiwixmobile.core.entity.LibraryNetworkEntity
 import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.navigate
 import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.viewModel
+import org.kiwix.kiwixmobile.core.extensions.closeKeyboard
 import org.kiwix.kiwixmobile.core.extensions.snack
 import org.kiwix.kiwixmobile.core.main.CoreMainActivity
 import org.kiwix.kiwixmobile.core.utils.BookUtils
 import org.kiwix.kiwixmobile.core.utils.NetworkUtils
 import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
+import org.kiwix.kiwixmobile.core.utils.SimpleRecyclerViewScrollListener
 import org.kiwix.kiwixmobile.core.utils.SimpleTextListener
 import org.kiwix.kiwixmobile.core.utils.dialog.DialogShower
 import org.kiwix.kiwixmobile.core.utils.dialog.KiwixDialog
@@ -141,6 +143,13 @@ class OnlineLibraryFragment : BaseFragment(), FragmentActivityExtensions {
         zimManageViewModel.shouldShowWifiOnlyDialog.value = false
       }
     })
+
+    // hides keyboard when scrolled
+    libraryList.addOnScrollListener(SimpleRecyclerViewScrollListener { _, newState ->
+      if (newState == RecyclerView.SCROLL_STATE_DRAGGING) {
+        libraryList.closeKeyboard()
+      }
+    })
   }
 
   override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {

core/src/main/java/org/kiwix/kiwixmobile/core/extensions/FragmentExtensions.kt

@@ -19,6 +19,7 @@
 package org.kiwix.kiwixmobile.core.extensions
 
 import android.content.Context
+import android.view.View
 import android.view.inputmethod.InputMethodManager
 import android.widget.Toast
 import androidx.fragment.app.Fragment
@@ -41,4 +42,9 @@ fun Fragment.closeKeyboard() {
   inputMethodManager.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0)
 }
 
+fun View.closeKeyboard() {
+  val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+  imm.hideSoftInputFromWindow(windowToken, 0)
+}
+
 val Fragment.coreMainActivity get() = activity as CoreMainActivity

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

@@ -42,6 +42,7 @@ import kotlinx.android.synthetic.main.layout_toolbar.toolbar
 import org.kiwix.kiwixmobile.core.R
 import org.kiwix.kiwixmobile.core.base.BaseFragment
 import org.kiwix.kiwixmobile.core.base.FragmentActivityExtensions
+import org.kiwix.kiwixmobile.core.extensions.closeKeyboard
 import org.kiwix.kiwixmobile.core.main.CoreMainActivity
 import org.kiwix.kiwixmobile.core.page.adapter.OnItemClickListener
 import org.kiwix.kiwixmobile.core.page.adapter.Page
@@ -50,6 +51,7 @@ import org.kiwix.kiwixmobile.core.page.viewmodel.Action
 import org.kiwix.kiwixmobile.core.page.viewmodel.PageState
 import org.kiwix.kiwixmobile.core.page.viewmodel.PageViewModel
 import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
+import org.kiwix.kiwixmobile.core.utils.SimpleRecyclerViewScrollListener
 import org.kiwix.kiwixmobile.core.utils.SimpleTextListener
 import javax.inject.Inject
 
@@ -135,6 +137,13 @@ abstract class PageFragment : OnItemClickListener, BaseFragment(), FragmentActiv
       pageViewModel.actions.offer(Action.UserClickedShowAllToggle(isChecked))
     }
     pageViewModel.state.observe(viewLifecycleOwner, Observer(::render))
+
+    // hides keyboard when scrolled
+    recycler_view.addOnScrollListener(SimpleRecyclerViewScrollListener { _, newState ->
+      if (newState == RecyclerView.SCROLL_STATE_DRAGGING) {
+        recycler_view.closeKeyboard()
+      }
+    })
   }
 
   override fun onCreateView(

core/src/main/java/org/kiwix/kiwixmobile/core/utils/SimpleRecyclerViewScrollListener.kt

@@ -0,0 +1,38 @@
+/*
+ * Kiwix Android
+ * Copyright (c) 2021 Kiwix <android.kiwix.org>
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package org.kiwix.kiwixmobile.core.utils
+
+import androidx.recyclerview.widget.RecyclerView
+
+class SimpleRecyclerViewScrollListener(
+  private val onLayoutScrollListener: (RecyclerView, Int) -> Unit // here we are calling callback
+) :
+  RecyclerView.OnScrollListener() {
+  override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
+    super.onScrollStateChanged(recyclerView, newState)
+    onLayoutScrollListener(
+      recyclerView,
+      newState
+    ) // implement the callback by passing recyclerview and  newState
+    super.onScrollStateChanged(recyclerView, newState)
+  }
+}
+
+
+