Rajab Davudov - Android UI Design: Layouts
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This document discusses different types of layouts in Android, including linear layout, relative layout, table layout, frame layout, and absolute layout. It provides examples of how each layout organizes UI elements and describes key attributes. The purpose of layouts is to define what is drawn on the screen and organize other controls for the wide variety of Android devices that have different screen sizes, densities, versions, and manufacturer skins. Custom layout resources can be created for different configurations.
Rajab Davudov - Android UI Design: Layouts
- 2. What is a Layout ? • A type of resource that defines what is drawn on the screen. • A type of View class whose primary purpose is to organize other controls.
- 3. Why is a Layout ? • More than 300 devices with different – Screen sizes and dimensions – Screen densities – Android versions – OEM skins – Control interfaces
- 4. Android Layouts • LinearLayout • RelativeLayout • TableLayout • FrameLayout • AbsoluteLayout • …
- 5. Linear Layout In a linear layout, like the name suggests, all the elements are displayed in a linear fashion(below is an example of the linear layouts), either Horizontally or Vertically and this behavior is set in android:orientation which is an attribute of the node LinearLayout. <LinearLayout android:orientation="vertical"> .... </LinearLayout> OR <LinearLayout android:orientation=“horizontal"> .... </LinearLayout>
- 7. Relative Layout In a relative layout every element arranges itself relative to other elements or a parent element. As an example, lets consider the layout defined below. The “Cancel” button is placed relatively, to the right of the “Login” button parallel. Here is the code snippet that achieves the mentioned alignment (Right of Login button parallel)
- 9. Table Layout Table layouts in Android works in the same way HTML table layouts work. You can divide your layouts into rows and columns. Its very easy to understand. The image below should give you an idea
- 10. Table Layout
- 11. Absolute Layout Non-professional and not recommended layout !!!
- 12. Custom Layout Resource • res/ – layout/ – layout-land/ – layout-xlarge-v11/ – layout-xlarge-land-v11/
- 13. Density Independent Pixels • dp or dip
- 14. Ready, Steady, Code !!!
- 15. Rajab Davudov Senior Developer at Azerfon radjab@gmail.com https://market.android.com/developer?pub=RADJAB http://gplus.to/radjab http://www.fb.me/rajab.davudov http://www.linkedin.com/in/radjab Market QR Code