Sequence Layout

Additional

Language
Kotlin
Version
1.0.7 (Jun 12, 2018)
Created
Mar 19, 2018
Updated
Jun 12, 2018
Owner
TransferWise Ltd. (transferwise)
Contributor
Sascha Huth (saschoar)
1
Activity
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Source code
APK file

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sequence-layout

A vertical sequence UI component for Android.

Animates a progress bar to the first active step in the sequence and then periodically runs a pulse animation on that step.

Setup

Add the JitPack maven repository to your root build.gradle:

allprojects {
    repositories {
      maven { url "https://jitpack.io" }
    }
}

And then the actual library dependency to your module's build.gradle:

dependencies {
    implementation 'com.github.transferwise:sequence-layout:1.0.7'
}

Usage

Take a look at the sample app in this repository.

In XML layout

You can define steps in your XML layout:

<com.transferwise.sequencelayout.SequenceLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <com.transferwise.sequencelayout.SequenceStep
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:anchor="30 Nov"
        app:title="First step"/>

    <com.transferwise.sequencelayout.SequenceStep
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:title="Second step"/>

    <com.transferwise.sequencelayout.SequenceStep
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:active="true"
        app:anchor="Today"
        app:subtitle="Subtitle of this step."
        app:title="Third step"
        app:titleTextAppearance="@style/TextAppearance.AppCompat.Title"/>

    <com.transferwise.sequencelayout.SequenceStep
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:title="Fourth step"/>

    <com.transferwise.sequencelayout.SequenceStep
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:anchor="2 Dec"
        app:title="Fifth step"/>
</com.transferwise.sequencelayout.SequenceLayout>

Custom attributes for SequenceLayout:

Attribute Description
progressForegroundColor foreground color of the progress bar
progressBackgroundColor background color of the progress bar

Custom attributes for SequenceStep:

Attribute Description
active boolean to indicate if step is active. There should only be one active step per SequenceLayout.
anchor text for the left side of the step
anchorTextAppearance styling for the left side of the step
title title of the step
titleTextAppearance styling for the title of the step
subtitle subtitle of the step
subtitleTextAppearance styling for the subtitle of the step

Programmatically

Alternatively, define an adapter that extends SequenceAdapter<T>, like this:

class MyAdapter(private val items: List<MyItem>) : SequenceAdapter<MyAdapter.MyItem>() {

    override fun getCount(): Int {
        return items.size
    }

    override fun getItem(position: Int): MyItem {
        return items[position]
    }

    override fun bindView(sequenceStep: SequenceStep, item: MyItem) {
        with(sequenceStep) {
            setActive(item.isActive)
            setAnchor(item.formattedDate)
            setAnchorTextAppearance(...)
            setTitle(item.title)
            setTitleTextAppearance()
            setSubtitle(...)
            setSubtitleTextAppearance(...)
        }
    }

    data class MyItem(val isActive: Boolean,
                      val formattedDate: String,
                      val title: String)
}

... and use it for a SequenceLayout:

val items = listOf(MyItem(...), MyItem(...), MyItem(...))
sequenceLayout.setAdapter(MyAdapter(items))