By Mark L. Murphy
Android Programming Tutorials exhibit you what you are able to do with Android, via a chain of forty person workouts. Android Programming Tutorials promises hands-on guide in tips on how to construct subtle Android purposes, utilizing the various applied sciences defined in CommonsWare's different Android books. those workouts lead you thru the fundamentals of making Android purposes, all through many enjoyable Android good points like net entry, position monitoring, maps, built-in WebKit browsers, cameras, accelerometers, domestic display widgets, and masses extra. complete resource code to the entire workout solutions is offered, that will help you when you get caught. Android Programming Tutorials makes a great spouse quantity to extra conventional Android books that simply let you know what's attainable.
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Additional resources for Android Programming Tutorials (3rd Edition)
Adding radio buttons Step #3: Update the Model Right now, our model class has no place to hold the restaurant type. type=type; } } Step #4: Save the Type to the Model Finally, we need to wire our RadioButton widgets to the model, such that when the user clicks the Save button, the type is saved as well. RadioGroup for this to compile. setType("delivery"); break; } } } }; Recompile, reinstall, and run the application. Confirm that you can save the restaurant data without errors. If you are wondering what will happen if there is no selected RadioButton, the RadioGroup call to getCheckedRadioButtonId() will return -1, which will not match anything in our switch statement, and so the model will not be modified.
Apk and signing it with a debug key... debug: [echo] Running zip align on final apk... apk BUILD SUCCESSFUL Total time: 4 seconds Note the BUILD SUCCESSFUL at the bottom – that is how you know the application compiled successfully. When you have a clean build, in your emulator or device, open up the application launcher, typically found at the bottom of the home screen: 8 Your First Android Project Figure 5. Android emulator application launcher Notice there is an icon for your Now application.
Confirm that you can save the restaurant data without errors. If you are wondering what will happen if there is no selected RadioButton, the RadioGroup call to getCheckedRadioButtonId() will return -1, which will not match anything in our switch statement, and so the model will not be modified. Extra Credit Here are some things you can try beyond those step-by-step instructions: • If you have an Android device, try installing the app on the device and running it there. The easiest way to do this is to shut down your emulator, plug in your device, and run ant reinstall.