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Chapter 2

Chapter 2. Building User Interfaces and Basic Applications. Figure 02.01: Standard Layout Types. Figure 02.02: RelativeLayout elements are positioned relative to each other. Figure 02.03: A GridLayout has two orientations.

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Chapter 2

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  1. Chapter 2 Building User Interfaces and Basic Applications

  2. Figure 02.01: Standard Layout Types

  3. Figure 02.02: RelativeLayout elements are positioned relative to each other

  4. Figure 02.03: A GridLayout has two orientations

  5. Figure 02.04: FrameLayouts contain a single control object, such as a canvas or list

  6. Figure 02.05: Soft keyboards can be altered during stages of input

  7. Figure 02.06: A soft keyboard configured for the input of an email address

  8. Figure 02.07: A soft keyboard configured for password input

  9. Figure 02.08: Android supports multiple soft keyboard configurations

  10. Figure 02.09: Text AutoComplete will produce dictionary-based suggestions during input

  11. Figure 02.10: The Search icon appears when you declare android:imeOptions=”actionSearch.”

  12. Figure 02.11: The Shipping Cost Calculator is partially conceptualized in a sketched prototype

  13. Figure 02.12: The final project structure for the Shipping Calculator app

  14. Figure 02.13: View objects arranged in the Layout Editor’s Design mode

  15. Figure 02.14: Widgets are subclasses of the View base class

  16. Figure 02.15:

  17. Figure 02.16: Switch and TobbleButton widgets

  18. Figure 02.17: CheckBox, Seekbar, Switch, and Button widgets arranged in aLinearLayout

  19. Figure 02.18: A Spinner widget displays values from a set

  20. Figure 02.19: View objects can be organized in ViewGroup containers.

  21. Figure 02.20: A RadioGroup is a ViewGroup that contains RadioButton widgets

  22. Figure 02.21: The Burger Calorie Calculator App and its View Structure

  23. Figure 02.22: The final project structure for the Burger Calorie Counter app

  24. Figure 02.23: activity_my.xml layout design

  25. Figure 02.24: Sample contents of R.java showing generated-resource identifiers

  26. Figure 02.25: Adaptive Design is used to display different content for different screens

  27. Figure 02.26: Many versions of activity_my.xml can be used by an application

  28. Figure 02.27: The Shipping Cost app reconceptualized in portrait and landscape orientations

  29. Figure 02.28: Additional layout directories can be used to store different configurations of a user interface

  30. Figure 02.29: Computed output values are organized in a separate ViewGroup container in res/layout/activity_my.xml

  31. Figure 02.30: A LinearLayout is added to res/layout-land/activity_my.xml togroup elements related to weight input

  32. Figure 02.31: A TableLayout built in Java

  33. Figure 02.32: The Calculator running in an AVD designed for a small device

  34. Figure 02.33: The project structure for the Calculator application

  35. Figure 02.34: The Layout design, activity_my.xml, for the Calculator application

  36. Figure 02.35: The display component of the calculator spans across four cells

  37. Figure 02.36: The second row of the Calculator contains the AC, %, and / buttons

  38. Figure 02.37: The buttons in the 3rd , 4th, and 5th rows are of equal size

  39. Figure 02.38: The final TableRow of the TableLayout contains two Buttons

  40. Figure 02.39: A SimpleExpression object is defined by two operands and an operator

  41. Figure 02.40: ViewGroup Containers

  42. Figure 02.41: The Renaissance Paintings App contains clickable paintings that scroll horizontally

  43. Figure 02.42: Project Structure for the Renaissance application

  44. Figure 02.43: The layout structure for activity_my.xml

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