PageIndicatorView

A small, simple, animated page indicator without the need for a viewpager.

Why

I built this library because I was tired of all the existing page indicators out there to require a viewpager as this prevented me from using in on an Android Wear project that time.

Usage

To use this view just include it in your depencencies using

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

in your project build.gradle file and

dependencies {
    compile 'com.github.markusressel:PageIndicatorView:v1.0.0'
}

in your desired module build.gradle file.

After successfull gradle build you will be able to use this in your xml layout files

<de.markusressel.android.library.pageindicatorview.PageIndicatorView
        android:id="@+id/pageIndicator"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

If you want you can change the style of the indicators by using attributes

<de.markusressel.android.library.pageindicatorview.PageIndicatorView
        android:id="@+id/pageIndicator"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:paddingTop="@dimen/activity_vertical_margin"
        app:piv_activeIndicatorFillColor="?attr/colorAccent"
        app:piv_activeIndicatorFillSize="20dp"
        app:piv_activeIndicatorStrokeColor="@android:color/white"
        app:piv_activeIndicatorStrokeWidth="5dp"
        app:piv_inactiveIndicatorFillColor="?attr/colorAccent"
        app:piv_inactiveIndicatorFillSize="15dp"
        app:piv_inactiveIndicatorStrokeColor="@android:color/darker_gray"
        app:piv_inactiveIndicatorStrokeWidth="10dp"
        app:piv_pageCount="5" />

You can also set these values in code using the following methods:

pageIndicator.activeIndicatorSize = pxFromDp(this, activeIndicatorSize)
pageIndicator.activeIndicatorFillColor = activeIndicatorColorFill
pageIndicator.activeIndicatorStrokeColor = activeIndicatorColorStroke
pageIndicator.activeIndicatorStrokeWidth = pxFromDp(this, activeIndicatorStrokeWidth)

pageIndicator.inactiveIndicatorSize = pxFromDp(this, inactiveIndicatorSize)
pageIndicator.inactiveIndicatorFillColor = inactiveIndicatorColorFill
pageIndicator.inactiveIndicatorStrokeColor = inactiveIndicatorColorStroke
pageIndicator.inactiveIndicatorStrokeWidth = pxFromDp(this, inactiveIndicatorStrokeWidth)

pageIndicator.indicatorGap = pxFromDp(this, indicatorGap)

pageIndicator.pageCount = pageCount

pageIndicator.setCurrentPage(initialPageIndex)          // animated
pageIndicator.setCurrentPage(initialPageIndex, false)   // not animated

To be able to react to "OnClick" events on indicators, you can set a OnIndicatorClickedListener like this:

pageIndicator.setOnIndicatorClickedListener(object : OnIndicatorClickedListener {
    override fun onIndicatorClicked(pageIndicatorView: PageIndicatorView, index: Int) {
        // set the indicator view to the clicked position
        pageIndicatorView.setCurrentPage(index, true)

        // set your view pager to the clicked position
        viewPager.currentItem = index
    }
})

License

Copyright (c) 2016 Markus Ressel

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.