Android Seekbar with two thumbs

Variations of this question can be found all over the internet but not an answer.

I want a seekbar with two-thumb range selection. I'm willing to program this myself but I lack experience with Android. Could someone give me some pointers on where to start. I mean, I know I will have to extend something (ProgressBar probably), but how should I go about to do that? Do I really have to recreate all the functionality of a standard seekbar, or is there an easier way?

Complete solutions are also welcome of course ;)

I too was looking for this, to no avail. So I made a new widget, feel free to use it: https://github.com/anothem/android-range-seek-bar

"I too was looking for this, to no avail. So I made a new widget, feel free to use it: https://code.google.com/p/range-seek-bar/"

This example Stephan linked works great! However, the user has to press any of the thumbs to get a respons. I wanted that if the user pressed the bar, the closest thumb would move to that position and work like normal.

I implemented this in the example code like this:

private final Thumb getClosestThumb(float touchX)

{
    double xValue = screenToNormalized(touchX);        
    return (Math.abs(xValue - normalizedMinValue) < Math.abs(xValue - normalizedMaxValue)) ? Thumb.MIN : Thumb.MAX;
}

And in the "public boolean onTouchEvent(MotionEvent event)",

if(pressedThumb == null),
   pressedThumb = getClosestThumb(mDownMotionX);

A windowed seek bar with left and right icons.
Presettable minimum window size and automatic anti crossover.

Mercurial repository at https://bitbucket.org/nimbusgb/windowed-seek-bar

I have used the anothem/android-range-seek-bar library

https://github.com/anothem/android-range-seek-bar

In xml

<org.florescu.android.rangeseekbar.RangeSeekBar
            android:id="@+id/pricebar_with_label"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            rsb:absoluteMinValue="20"
            rsb:absoluteMaxValue="150"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            />

Incase you are using any of the material components such as: Snackbar, BottomNavigationView etc. you don't have to use another 3rd party library.

The material library also ships with RangeSlider which can be used to select a range of values.

Material library - implementation 'com.google.android.material:material:latestVersion'