TimelineView

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Implementing Timeline for Attendees Activity in Organizer App

Open Event Organizer App offers the functionality to Checkin/checkout attendees but the Organizer was unable to view when a particular attendee was checkin or checkout. We decided to implement a feature to view the timeline of checkin/checkout for each attendee.

Let’s begin by adding the dependency in build.gradle.

implementation “com.github.vipulasri:timelineview:”1.0.6”

In the recyclerview item layout add the TimeLineView layout. Following are some of the useful attributes.

  1. app:markerInCenter – This defines the position of the round marker within the layout. Setting it to true, position it in center.
  2. app:marker – Custom drawables can be set as marker.
<com.github.vipulasri.timelineview.TimelineView
android:id=”@+id/time_marker”
android:layout_width=”wrap_content”
android:layout_height=”match_parent”
app:marker=”@drawable/ic_marker_active”
app:line=”#aaa4a4″
app:lineSize=”2dp”
app:linePadding=”3dp”
app:markerInCenter=”true”
app:markerSize=”20dp” />

The ViewHolder class will extend the RecyclerView,ViewHolder class. In the constructor, we will add a parameter viewType and then set it to TimeLine Marker layout using method initLine.

public CheckInHistoryViewHolder(CheckInHistoryLayoutBinding binding, int viewType) {
super(binding.getRoot());
this.binding = binding;
binding.timeMarker.initLine(viewType);
}

In RecyclerViewAdapter, we will override the getItemViewType() method. Here we will use the getTimeLineViewType method which takes in position and total size of the recycler view list and returns a TimeLineView type object.

@Override
public int getItemViewType(int position) {
return TimelineView.getTimeLineViewType(position, getItemCount());
}

References

  1. TimeLineView library by VipulAsri https://github.com/vipulasri/Timeline-View
  2. Android Documentation for RecyclerViewAdapter https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter
  3. Android Documentation for RecyclerViewView https://developer.android.com/reference/android/support/v7/widget/RecyclerView
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