Learning Mobile App Development: A Hands-on Guide to Building Apps with iOS and Android

Exercises

1. Add the choice of a background color to the settings activity. Create a couple of new color resources in color.xml. Add these choices as a RadioGroup to the settings screen. You will have to modify the layout to place all the RadioGroups in a ScrollView so that you can see them all. Make the choice persist in a SharedPreferences object. Use the following command in the onCreate method of the settings activity to set the chosen background color:

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scrollviewobject.setBackgroundResource(R.color.colorresourcename);

2. Create a method in ContactDataSource that will only update the Contact’s Address. Create a ContactAddress object to pass data to the method.

3. Modify the Contact table to include a field BFF ...