feat: Add expand/collapse animation for View/TextView (#2186)

Details:
- Use external libraries for expandable text view and view container

Fixes: #2182

Author: anhanh11001

app/build.gradle

@@ -224,6 +224,13 @@ dependencies {
     // Searchable Spinner
     implementation 'com.toptoche.searchablespinner:searchablespinnerlibrary:1.3.1'
 
+    //ExpandableTextView
+    implementation 'at.blogc:expandabletextview:1.0.5'
+
+    //ExpandableView
+    implementation 'net.cachapa.expandablelayout:expandablelayout:2.9.2'
+
+
 
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.threeten:threetenbp:1.4.0'

app/src/main/java/org/fossasia/openevent/general/event/EventDetailsFragment.kt

@@ -415,14 +415,9 @@ class EventDetailsFragment : Fragment() {
         // Organizer Section
         if (!event.ownerName.isNullOrEmpty()) {
             val organizerDescriptionListener = View.OnClickListener {
-                if (rootView.seeMoreOrganizer.text == getString(R.string.see_more)) {
-                    rootView.seeMoreOrganizer.text = getString(R.string.see_less)
-                    rootView.eventOrganiserDescription.minLines = 0
-                    rootView.eventOrganiserDescription.maxLines = Int.MAX_VALUE
-                } else {
-                    rootView.seeMoreOrganizer.text = getString(R.string.see_more)
-                    rootView.eventOrganiserDescription.setLines(3)
-                }
+                rootView.eventOrganiserDescription.toggle()
+                rootView.seeMoreOrganizer.text = if (rootView.eventOrganiserDescription.isExpanded)
+                    getString(R.string.see_less) else getString(R.string.see_more)
             }
 
             rootView.eventOrganiserDescription.post {

app/src/main/java/org/fossasia/openevent/general/sessions/SessionFragment.kt

@@ -231,14 +231,9 @@ class SessionFragment : Fragment() {
             false -> {
                 rootView.sessionDetailAbstract.text = description.stripHtml()
                 val sessionAbstractClickListener = View.OnClickListener {
-                    if (rootView.sessionDetailAbstractSeeMore.text == getString(R.string.see_more)) {
-                        rootView.sessionDetailAbstractSeeMore.text = getString(R.string.see_less)
-                        rootView.sessionDetailAbstract.minLines = 0
-                        rootView.sessionDetailAbstract.maxLines = Int.MAX_VALUE
-                    } else {
-                        rootView.sessionDetailAbstractSeeMore.text = getString(R.string.see_more)
-                        rootView.sessionDetailAbstract.setLines(LINE_COUNT_ABSTRACT + 1)
-                    }
+                    rootView.sessionDetailAbstract.toggle()
+                    rootView.sessionDetailAbstractSeeMore.text = if (rootView.sessionDetailAbstract.isExpanded)
+                        getString(R.string.see_less) else getString(R.string.see_more)
                 }
 
                 rootView.sessionDetailAbstract.post {

app/src/main/java/org/fossasia/openevent/general/speakercall/SpeakersCallProposalFragment.kt

@@ -138,7 +138,7 @@ class SpeakersCallProposalFragment : Fragment(), ComplexBackPressFragment {
             .observe(viewLifecycleOwner, Observer {
                 rootView.speakerProgressBar.isVisible = it
             })
-        rootView.speakerInfoContainer.isVisible = speakersCallProposalViewModel.isSpeakerInfoShown
+        rootView.speakerInfoContainer.isExpanded = speakersCallProposalViewModel.isSpeakerInfoShown
 
         rootView.titleLayout.setRequired()
         setupTrack()
@@ -159,7 +159,7 @@ class SpeakersCallProposalFragment : Fragment(), ComplexBackPressFragment {
 
         rootView.expandSpeakerDetailButton.setOnClickListener {
             speakersCallProposalViewModel.isSpeakerInfoShown = !speakersCallProposalViewModel.isSpeakerInfoShown
-            rootView.speakerInfoContainer.isVisible = speakersCallProposalViewModel.isSpeakerInfoShown
+            rootView.speakerInfoContainer.toggle()
         }
 
         rootView.submitProposalButton.setOnClickListener {

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

@@ -433,16 +433,18 @@
                             android:textColor="@color/light_grey"
                             android:textSize="@dimen/event_details_headers" />
 
-                        <TextView
+                        <at.blogc.android.views.ExpandableTextView
                             android:id="@+id/eventOrganiserDescription"
                             android:layout_width="match_parent"
                             android:layout_height="wrap_content"
                             app:strippedHtml="@{event.ownerDescription}"
                             app:hideIfEmpty="@{event.ownerDescription}"
                             android:layout_marginBottom="@dimen/layout_margin_small"
+                            android:background="?selectableItemBackground"
                             android:ellipsize="end"
                             android:lines="3"
                             android:textColor="@color/light_grey"
+                            app:animation_duration="300"
                             tools:text="Description" />
 
                         <TextView

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

@@ -164,13 +164,14 @@
             android:textColor="@color/dark_grey"
             android:textSize="@dimen/event_details_headers"
             android:layout_marginBottom="@dimen/layout_margin_medium"/>
-        <TextView
+        <at.blogc.android.views.ExpandableTextView
             android:id="@+id/sessionDetailAbstract"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:ellipsize="end"
             android:lines="4"
             android:autoLink="web|email|phone"
+            android:background="?selectableItemBackground"
             tools:text="@string/description_preview"/>
         <TextView
             android:id="@+id/sessionDetailAbstractSeeMore"