Auto load items when list end is reached

Auto load items when list end is reached

Author: lakshya-20

app/src/main/java/com/github/code/gambit/ui/fragment/home/HomeFragment.kt

@@ -28,6 +28,7 @@ import com.github.code.gambit.utility.extention.longToast
 import com.github.code.gambit.utility.extention.shortToast
 import com.github.code.gambit.utility.extention.show
 import com.github.code.gambit.utility.extention.snackbar
+import com.github.code.gambit.utility.sharedpreference.LastEvaluatedKeyManager
 import com.google.android.material.bottomsheet.BottomSheetBehavior
 import com.google.android.material.bottomsheet.BottomSheetBehavior.BottomSheetCallback
 import com.takusemba.spotlight.OnSpotlightListener
@@ -56,12 +57,17 @@ class HomeFragment : Fragment(R.layout.fragment_home), FileUrlClickCallback, Bot
     private lateinit var _urlBinding: FileUrlLayoutBinding
     private val urlBinding get() = _urlBinding
 
+    private var isFirstLoading = true
+
     @Inject
     lateinit var homeRepository: HomeRepository
 
     @Inject
     lateinit var adapter: FileListAdapter
 
+    @Inject
+    lateinit var lekManager: LastEvaluatedKeyManager
+
     lateinit var fileSearchComponent: FileSearchComponent
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -71,9 +77,10 @@ class HomeFragment : Fragment(R.layout.fragment_home), FileUrlClickCallback, Bot
         _searchBinding = binding.searchLayout
         _urlBinding = binding.fileUrlLayout
         activity?.window?.exitFullscreen()
+        lekManager.flush()
         registerFilterComponents()
         registerUrlComponent()
-
+        binding.linearProgress.hide()
         binding.filterButton.setOnClickListener {
             showFilter()
         }
@@ -92,6 +99,7 @@ class HomeFragment : Fragment(R.layout.fragment_home), FileUrlClickCallback, Bot
         }
 
         binding.swipeRefresh.setOnRefreshListener {
+            binding.swipeRefresh.isRefreshing = false
             viewModel.setEvent(HomeEvent.GetFiles)
         }
 
@@ -112,7 +120,11 @@ class HomeFragment : Fragment(R.layout.fragment_home), FileUrlClickCallback, Bot
                 is HomeState.Error -> longToast(it.message)
                 is HomeState.FilesLoaded -> {
                     if (!it.isSearchResult) {
-                        stopShimmer()
+                        if (isFirstLoading) {
+                            stopShimmer()
+                        } else {
+                            binding.linearProgress.hide()
+                        }
                         adapter.addAll(it.files, true)
                         binding.noFileIllustrationContainer.hide()
                         binding.swipeRefresh.isRefreshing = false
@@ -122,7 +134,11 @@ class HomeFragment : Fragment(R.layout.fragment_home), FileUrlClickCallback, Bot
                 }
                 is HomeState.Loading -> {
                     if (!it.isSearchResultLoading) {
-                        showShimmer()
+                        if (isFirstLoading) {
+                            showShimmer()
+                        } else {
+                            binding.linearProgress.show()
+                        }
                         return@observe
                     }
                     fileSearchComponent.setRefreshing()
@@ -151,6 +167,18 @@ class HomeFragment : Fragment(R.layout.fragment_home), FileUrlClickCallback, Bot
         binding.fileList.adapter = adapter
         adapter.listener = this
         binding.fileList.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
+                super.onScrollStateChanged(recyclerView, newState)
+                val visibleItemCount = layoutManager.childCount
+                val totalItemCount = layoutManager.itemCount
+                val pastVisibleItem = layoutManager.findFirstCompletelyVisibleItemPosition()
+                if (!recyclerView.canScrollVertically(1) &&
+                    newState == RecyclerView.SCROLL_STATE_IDLE &&
+                    pastVisibleItem + visibleItemCount >= totalItemCount
+                ) {
+                    viewModel.setEvent(HomeEvent.GetFiles)
+                }
+            }
             override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
                 if (searchBinding.root.isVisible) {
                     super.onScrolled(recyclerView, dx, dy)
@@ -161,11 +189,6 @@ class HomeFragment : Fragment(R.layout.fragment_home), FileUrlClickCallback, Bot
                 } else {
                     showBottomNav()
                 }
-                if (!recyclerView.canScrollVertically(1) && layoutManager.findLastVisibleItemPosition() == layoutManager.itemCount - 1) {
-                    // shortToast("End of list")
-                    println()
-                }
-                Timber.tag("home").i("(dx: $dx, dy: $dy)")
                 super.onScrolled(recyclerView, dx, dy)
             }
         })
@@ -230,6 +253,7 @@ class HomeFragment : Fragment(R.layout.fragment_home), FileUrlClickCallback, Bot
     }
 
     private fun stopShimmer() {
+        isFirstLoading = false
         showBottomNav()
         binding.shimmerLayout.stopShimmer()
         binding.shimmerLayout.hide()

app/src/main/java/com/github/code/gambit/utility/AppConstant.kt

@@ -4,27 +4,13 @@ object AppConstant {
     const val AUTH_ATTRIBUTE_CUSTOM_PROFILE = "custom:profile_image"
     const val BASE_URL = "https://mhv71te0rh.execute-api.ap-south-1.amazonaws.com/beta/"
     const val SHARE_URL = "https://vt-webclient.herokuapp.com/"
-    object RequestCode {
-        const val PERMISSIONS = 101
-        const val GALLERY = 100
-        const val CAMERA = 102
-        const val DOCUMENT = 103
-    }
 
     object Named {
         const val PERMISSION_ARRAY = "PERMISSION"
         const val USER_ID = "UID"
         const val BASE_URL = "BRL"
     }
 
-    @Deprecated(level = DeprecationLevel.WARNING, message = "ImageService related constants no longer used")
-    object Cloudinary {
-        const val UPLOAD_PRESET = "mqlj7ft0"
-        const val RESULT_URL_KEY = "url"
-        const val BASE_URL =
-            "http://res.cloudinary.com/code-gambit/image/upload/v1619956278/Profile%20Image/"
-    }
-
     object API_PATH {
         const val USER_ID = "userId"
         const val FILE_ID = "fileId"

app/src/main/java/com/github/code/gambit/utility/sharedpreference/LastEvaluatedKeyManager.kt

@@ -20,5 +20,10 @@ constructor(@ApplicationContext context: Context) : PreferenceManager(context) {
         }
     }
 
+    fun flush() {
+        putLastEvalKey("", KeyType.URL)
+        putLastEvalKey("", KeyType.URL)
+    }
+
     enum class KeyType { FILE, URL }
 }

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

@@ -63,11 +63,20 @@
 
     </LinearLayout>
 
+    <com.google.android.material.progressindicator.LinearProgressIndicator
+        android:id="@+id/linear_progress"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/top_container"
+        android:indeterminate="true"
+        app:indicatorColor="@color/secondary"
+        android:visibility="gone" />
+
     <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
         android:id="@+id/swipe_refresh"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_below="@id/top_container"
+        android:layout_below="@id/linear_progress"
         android:visibility="gone">
 
         <androidx.recyclerview.widget.RecyclerView
@@ -114,7 +123,8 @@
         android:id="@+id/shimmer_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        app:shimmer_duration="800">
+        app:shimmer_duration="800"
+        android:visibility="visible">
 
         <include layout="@layout/home_placeholder_layout" />