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By William Oliver Stevens; Allan F Westcott

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NOTE Appendix B explains how to emulate the different types of Android devices. It is preferable to create a few AVDs with different API levels so that your application can be tested on different devices. ) – API Level 11” target. To see what the Android emulator looks like, select the AVD you have just created and click the Start… button. 0 emulator. FIGURE 1-11 Click and move the lock icon to touch a circle that appears when you move the mouse. This unlocks the emulator. 0 screen. indd 13 28/06/11 12:32 PM 14 ❘ CHAPTER 1 GETTING STARTED WITH ANDROID PROGRAMMING FOR TABLETS FIGURE 1-12 Clicking the Apps icon on the top-right corner of the screen reveals a list of installed applications on the device (see Figure 1-13).

Assets — This folder contains all the assets used by your application, such as HTML, text files, databases, etc. ➤ res — This folder contains all the resources used in your application. It also contains a few other subfolders: drawable-, layout, and values. xml — This is the manifest file for your Android application. ). xml fi le defi nes the user interface for your activity. xml fi le located in the res/values folder. xml fi le and reference these strings using the @string identifier.

WindowManager; public class MainActivity extends Activity { /** Called when the activity is first created. commit(); } } 3. indd 42 Press F11 to run the application on the Android emulator. Observe that when the emulator is in landscape mode, fragment 1 (green) is displayed (as Figure 2-11). If you press Ctrl+F11 to change the orientation of the emulator to landscape, fragment 2 (yellow) is added instead (see Figure 2-12). beginTransaction(); In this example, you used the WindowManager to determine whether the device is currently in portrait or landscape mode.

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