Range Slider Preference

This is a simple (yet very useful) library, based on com.google.android.material.slider.RangeSlider widget, to be used as Preference in Android's PreferenceScreen pages.

The problem:
Android's built-in SeekBarPreference can only include a single slider, thus can show/set only one value per preference. However, if you need to set ranges in preferences, there's no built-in Slider Preference available.

Range Slider Preference is able to show/set several values per preference, covering SeekBarPreference's shortcoming.

How to include
You can clone this repository using git, or simply add it to your project as a submodule (git submodule add https://github.com/siavash79/rangesliderpreference.git)

To use this preference in your apps, simply add this repository to your project as a module, and add the module to your app's dependencies.

You can then add it as a preference to your app settings page:

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
.
.
<sh.siava.rangesliderpreference.RangeSliderPreference
  android:key="MY_KEY"
  android:title="@string/the_title"
  android:summary="@string/the_summary"
  app:tickInterval=".5"        //value intervals
  app:valueCount="3"           //How many values shall be set - can be even 1
  app:minVal="0"	       //Slider start point
  app:maxVal="60"              //Slider end point
  app:defaultValue="3,12,46.5" //Default values, comma separated 
/>
.
.
</PreferenceScreen>

In the above example, you are setting a slider that operates 3 values that must be between 0 to 60, increase every 0.5 unit, and if the preference is not yet set, defaults to 3, 12 and 46.5.

RangeSliderPreference is also able to parse the values of your previously-set preference, if it's of any of types Integer, Float, or JSON string (Name/value, or name/array)

to read the preference values in your app, simply use the static method included:

List<Float> values = RangeSliderPreference.getValues(
                        myPrefrences        /*SharedPreferences*/,
                        "MY_KEY"            /* preference key */, 
                        2                   /* default value in case the preference was not found */);

and the value(s) will be presented in a List<Float> object.