[Free] ThColorPicker - Allowing users to select colors with options for alpha, hex, and preview.

[TechHamara]

🧩 ThColorPicker

An extension for MIT App Inventor 2.
A color picker component developed by TechHamara using Fast, allowing users to select colors with options for alpha, hex, and preview.
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Specifications

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Package: io.th.thcolorpicker
Size: 28.81 KB
Version: 1.0
Minimum API Level: 21
Updated On: 2025-06-09T18:30:00Z
Built & documented using: FAST v2.8.4
Download Aix here
Download aia, apk on GitHub

Demo

Blocks

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Events:

ThColorPicker has total 3 events.

ColorSelected

Event raised when a color is selected

Parameter	Type
color	number

DialogDismissed

Event raised when the color picker dialog is dismissed

NoneSelected

Event raised when the 'Select None' button is clicked

Methods:

ThColorPicker has total 8 methods.

ShowColorPicker

Shows the color picker dialog

InitialColor

Sets the initial color of the color picker

Parameter	Type
color	number

SelectedColor

Gets the currently selected color

• Return type: number

SelectedColorHex

Gets the hex code of the selected color

• Return type: text

SelectedColorARGB

Gets the ARGB components of the selected color

• Return type: any

SelectedColorHSV

Gets the HSV components of the selected color

• Return type: any

ColorFromHSV

Sets a color from HSV values

Parameter	Type
hue	number
saturation	number
value	number

ColorFromARGB

Sets a color from ARGB values

Parameter	Type
alpha	number
red	number
green	number
blue	number

Setters:

ThColorPicker has total 3 setter properties.

ShowPreview

Sets whether to show the color preview

• Input type: boolean

SelectNoneButtonText

Sets the text for the 'Select None' button

• Input type: text

DefaultColor

Sets the default color to use when 'Select None' is clicked

• Input type: number

Getters:

ThColorPicker has total 3 getter properties.

ShowPreview

Sets whether to show the color preview

• Return type: boolean

SelectNoneButtonText

Sets the text for the 'Select None' button

• Return type: text

DefaultColor

Sets the default color to use when 'Select None' is clicked

• Return type: number

Feel free to contact us any quarry or suggestions.

@TechHamara

Library Used

Thank you martin-stone for your awesome library

[TIMAI2]

What colour number does it return, 32 bit or 64 bit ?

ref

[TechHamara]

@TIMAI2

What colour number does it return, 32 bit or 64 bit ?

The HSV-Alpha Color Picker Android library by Martin Stone returns 32-bit ARGB color values, not 64-bit.

Details:

The color values are returned in int format, which in Java is a 32-bit signed integer.

AARRGGBB format:

8 bits for Alpha (transparency)

8 bits for Red

8 bits for Green

8 bits for Blue

Example:

If a color is fully opaque red, it would return:

0xFFFF0000

Which is:

Alpha: FF (255)

Red: FF (255)

Green: 00 (0)

Blue: 00 (0)

Source Reference:

The method getColor() in AlphaColorPicker.java returns:

return Color.HSVToColor(alpha, hsv);

And Color.HSVToColor() returns an int (32-bit).

Conclusion:

The color number returned by this library is in 32-bit ARGB (int) format.

[TIMAI2]

So RED (255,0,0) would return -65536 ?

[TechHamara]

You are right
Some functions return 64 bit colour number.