- version bump v1.4

- use enqueueUniqueWork for Workers making DB transactions to prevent duplicate row entries
- display progress indicator when syncing libraries/projects

app/build.gradle.kts

@@ -25,7 +25,7 @@ android {
         minSdkVersion(19)
         targetSdkVersion(30)
         versionCode(getCommitCount().toInt())
-        versionName = "1.3"
+        versionName = "1.4"
 
         vectorDrawables {
             useSupportLibrary = true
@@ -137,7 +137,7 @@ dependencies {
     implementation("androidx.core:core-ktx:1.3.2")
     implementation("androidx.appcompat:appcompat:1.2.0")
 
-    implementation("com.google.android.material:material:1.2.1")
+    implementation("com.google.android.material:material:1.3.0")
     implementation("androidx.constraintlayout:constraintlayout:2.0.1")
     implementation("androidx.vectordrawable:vectordrawable:1.1.0")
     implementation("androidx.navigation:navigation-fragment:${findProperty("fragment.version")}")

app/deps.list.txt

@@ -8,7 +8,7 @@ org.jetbrains.kotlin:kotlin-android-extensions-runtime:1.4.10
 org.jetbrains.kotlin:kotlin-stdlib:1.4.10
 androidx.core:core-ktx:1.3.2
 androidx.appcompat:appcompat:1.2.0
-com.google.android.material:material:1.2.1
+com.google.android.material:material:1.3.0
 androidx.constraintlayout:constraintlayout:2.0.1
 androidx.vectordrawable:vectordrawable:1.1.0
 androidx.navigation:navigation-fragment:2.3.0

app/src/main/java/name/lmj0011/jetpackreleasetracker/ui/libraries/LibrariesFragment.kt

@@ -11,9 +11,11 @@ import androidx.lifecycle.Observer
 import androidx.lifecycle.lifecycleScope
 import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.work.ExistingWorkPolicy
 import androidx.work.OneTimeWorkRequestBuilder
 import androidx.work.WorkManager
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import kotlinx.android.synthetic.main.fragment_libraries.*
 import kotlinx.coroutines.*
 import name.lmj0011.jetpackreleasetracker.MainActivity
 import name.lmj0011.jetpackreleasetracker.R
@@ -59,6 +61,10 @@ class LibrariesFragment : Fragment(R.layout.fragment_libraries), SearchableRecyc
         binding = FragmentLibrariesBinding.bind(view)
         binding.lifecycleOwner = this
         binding.homeViewModel = librariesViewModel
+        binding.fetchLibrariesButton.setOnClickListener {
+            enqueueNewLibraryRefreshWorkerRequest()
+            (requireActivity() as MainActivity).showToastMessage(requireContext().getString(R.string.toast_message_fetching_libraries))
+        }
     }
 
     private fun setupAdapter() {
@@ -137,7 +143,12 @@ class LibrariesFragment : Fragment(R.layout.fragment_libraries), SearchableRecyc
 
             // if it's always empty, there's a problem with the network
             if (it.isEmpty()) {
+                binding.swipeRefresh.visibility = View.GONE
+                binding.emptyListContainer.visibility = View.VISIBLE
                 enqueueNewLibraryRefreshWorkerRequest()
+            } else {
+                binding.swipeRefresh.visibility = View.VISIBLE
+                binding.emptyListContainer.visibility = View.GONE
             }
 
             listAdapter.submitLibArtifacts(it.toList())
@@ -164,20 +175,32 @@ class LibrariesFragment : Fragment(R.layout.fragment_libraries), SearchableRecyc
             .addTag(requireContext().getString(R.string.update_one_time_worker_tag))
             .build()
 
+        progress_indicator.visibility = View.VISIBLE
+
         WorkManager.getInstance(requireContext())
             .getWorkInfoByIdLiveData(libraryRefreshWorkerRequest.id)
             .observe(viewLifecycleOwner, Observer { workInfo ->
                 if (workInfo != null) {
                     val progress = workInfo.progress
                     val value = progress.getInt(ProjectSyncAllWorker.Progress, 0)
+                    progress_indicator.progress = value
+
+                    /**
+                     * start in indeterminate mode until ~20% complete,
+                     * to give an immediate visual que of work being done
+                     */
+                    if (value >= 20) progress_indicator.isIndeterminate = false
 
                     if (value >= 100) {
                         librariesViewModel.refreshLibraries()
+                        progress_indicator.visibility = View.GONE
+                        progress_indicator.isIndeterminate = true
                     }
                 }
             })
 
-        WorkManager.getInstance(requireContext()).enqueue(libraryRefreshWorkerRequest)
+        WorkManager.getInstance(requireContext())
+            .enqueueUniqueWork(getString(R.string.unique_work_name_fetch_libraries), ExistingWorkPolicy.KEEP, libraryRefreshWorkerRequest)
     }
 
     private fun refreshListAdapter(query: String? = null) {

app/src/main/java/name/lmj0011/jetpackreleasetracker/ui/projectsyncs/ProjectSyncsFragment.kt

@@ -4,16 +4,16 @@ import android.os.Bundle
 import android.view.*
 import androidx.appcompat.widget.SearchView
 import androidx.core.os.bundleOf
-import androidx.databinding.DataBindingUtil
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.Observer
-import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.findNavController
 import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.work.ExistingWorkPolicy
 import androidx.work.OneTimeWorkRequestBuilder
 import androidx.work.WorkManager
+import kotlinx.android.synthetic.main.fragment_libraries.*
 import kotlinx.coroutines.*
 import name.lmj0011.jetpackreleasetracker.MainActivity
 import name.lmj0011.jetpackreleasetracker.R
@@ -137,21 +137,32 @@ class ProjectSyncsFragment : Fragment(R.layout.fragment_project_syncs), Searchab
                 .addTag(requireContext().getString(R.string.project_sync_all_one_time_worker_tag))
                 .build()
 
+            progress_indicator.visibility = View.VISIBLE
+
             WorkManager.getInstance(requireActivity().application)
                 .getWorkInfoByIdLiveData(projectSyncAllWorkRequest.id)
                 .observe(viewLifecycleOwner, Observer { workInfo ->
                     if (workInfo != null) {
                         val progress = workInfo.progress
                         val value = progress.getInt(Progress, 0)
+                        progress_indicator.progress = value
+
+                        /**
+                         * start in indeterminate mode until ~20% complete,
+                         * to give an immediate visual que of work being done
+                         */
+                        if (value >= 20) progress_indicator.isIndeterminate = false
 
                         if (value >= 100) {
                             projectSyncsViewModel.refreshProjectSyncs()
+                            progress_indicator.visibility = View.GONE
+                            progress_indicator.isIndeterminate = true
                         }
                     }
                 })
 
-            WorkManager.getInstance(requireActivity().application)
-                .enqueue(projectSyncAllWorkRequest)
+            WorkManager.getInstance(requireContext())
+                .enqueueUniqueWork(getString(R.string.unique_work_name_sync_projects), ExistingWorkPolicy.KEEP, projectSyncAllWorkRequest)
 
             binding.swipeRefresh.isRefreshing = false
             (requireActivity() as MainActivity).showToastMessage(requireContext().getString(R.string.toast_message_syncing_projects))

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

@@ -15,6 +15,54 @@
         android:layout_height="match_parent"
         tools:context=".ui.libraries.LibrariesFragment">
 
+        <com.google.android.material.progressindicator.LinearProgressIndicator
+            android:id="@+id/progress_indicator"
+            style="@style/Widget.MaterialComponents.LinearProgressIndicator"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:indeterminate="true"
+            android:visibility="gone"
+            app:indicatorColor="@color/colorAccent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.0"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <androidx.constraintlayout.widget.ConstraintLayout
+            android:id="@+id/emptyListContainer"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:padding="@dimen/default_list_item_padding"
+            android:visibility="gone"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:visibility="visible">
+
+            <TextView
+                android:id="@+id/emptyListTextView"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/empty_libraries_text"
+                android:textAlignment="center"
+                android:textSize="20sp"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toTopOf="parent"
+                tools:visibility="visible" />
+
+            <Button
+                android:id="@+id/fetchLibrariesButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/empty_libraries_fetch_btn"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/emptyListTextView" />
+
+        </androidx.constraintlayout.widget.ConstraintLayout>
+
         <androidx.appcompat.widget.SearchView
             android:id="@+id/librariesSearchView"
             android:layout_width="match_parent"

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

@@ -15,6 +15,19 @@
         android:layout_height="match_parent"
         tools:context=".ui.projectsyncs.ProjectSyncsFragment">
 
+        <com.google.android.material.progressindicator.LinearProgressIndicator
+            android:id="@+id/progress_indicator"
+            style="@style/Widget.MaterialComponents.LinearProgressIndicator"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:indeterminate="true"
+            android:visibility="gone"
+            app:indicatorColor="@color/colorAccent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.0"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
         <androidx.constraintlayout.widget.ConstraintLayout
             android:id="@+id/emptyListContainer"
             android:layout_width="wrap_content"

app/src/main/res/values/strings.xml

@@ -9,6 +9,8 @@
     <string name="list_header_artifact">Artifact</string>
     <string name="list_header_latest_stable">Stable</string>
     <string name="list_header_latest_release">Latest</string>
+    <string name="empty_libraries_text">AndroidX Libraries will show up here</string>
+    <string name="empty_libraries_fetch_btn">Fetch Libraries</string>
     <string name="no_updates_text">New AndroidX releases will show up here</string>
     <string name="empty_project_syncs_text">Monitor your project\'s Androidx dependencies</string>
     <string name="empty_project_syncs_learn_more_btn">Learn More</string>
@@ -23,6 +25,7 @@
     <string name="project_sync_no_dependencies">No androidx dependencies found</string>
 
     <string name="toast_message_updating_libraries">Updating Libraries</string>
+    <string name="toast_message_fetching_libraries">Fetching Libraries</string>
     <string name="toast_message_syncing_projects">Syncing Projects</string>
 
     <string name="notification_text_fetching_artifacts">fetching Artifacts...</string>
@@ -56,4 +59,6 @@
     </string>
 
     <string name="key_project_sync_id_bundle_property">projectSyncId</string>
+    <string name="unique_work_name_fetch_libraries">FETCH_LIBRARIES</string>
+    <string name="unique_work_name_sync_projects">SYNC_PROJECTS</string>
 </resources>