Android How to Program, 3/e

5.9 ColorDialogFragment Class

Class ColorDialogFragment (Figs. 5.43–5.47) extends DialogFragment to create an AlertDialog for setting the drawing color. The class’s instance variables (lines 18–23) are used to reference the GUI controls for selecting the new color, displaying a preview of it and storing the color as a 32-bit int value that represents the color’s ARGB values.

Fig. 5.43 ColorDialogFragment’s package statement, import statements and instance variables

Figure 5.43 Full Alternative Text

Fig. 5.47 Anonymous inner class that implements interface OnSeekBarChangeListener to respond to the events of the alpha, red, green and blue SeekBar ...