توضیحات:

SimpleWaveform is a widget to show a sequence data in waveform or bar chart.

SimpleWaveform can be highly customized:
(1)show original positive and negative data, or show absolute of the data for amplitude
(2)data can be px or percent of full amplitude. Will automatically detect its width and height in px
(3)choose to show bar, peak outline, x-axis
(4)choose how to connect nearby peak for outline
(5)x-axis can be located at top/center/bottom
(6)can set bar width and gap
(7)all pencil can be set include bar/outline/x-axis/background
(8)two pencil with different colors to show progress
(9)wave from left or from right
(10)return bar position when your finger touch waveform

often used:

(1)show sound amplitude when record sound. ref to advance demo1
(2)Embedded in horizontal recycler view to show a very long sound waveform. ref to advance demo2