Android Programming The Big Nerd Ranch Guide by Bill Phillips, Chris Stewart, Kristin Marsicano (z-lib.org)

Declaring activities in the manifest Declaring activities in the manifest The manifest is an XML file containing metadata that d ...

Chapter 5  Your Second Activity Adding a cheat button to QuizActivity The plan is for the user to press a button in QuizActivity ...

Starting an Activity Reopen QuizActivity.java. Add a variable, get a reference, and set a View.OnClickListener stub for the CHEA ...

Chapter 5  Your Second Activity In particular, it is sent to a part of the OS called the ActivityManager. The ActivityManager th ...

Passing Data Between Activities Within mCheatButton’s listener, create an Intent that includes the CheatActivity class. Then pas ...

Chapter 5  Your Second Activity When the user presses the Back button to return to the QuizActivity, the CheatActivity will be d ...

Using intent extras An activity may be started from several different places, so you should define keys for extras on the activi ...

Chapter 5  Your Second Activity In CheatActivity, retrieve the value from the extra in onCreate(Bundle) and store it in a member ...

Getting a result back from a child activity This code is pretty straightforward. You set the TextView’s text using TextView.setT ...

Chapter 5  Your Second Activity Setting result codes is useful when the parent needs to take different action depending on how t ...

Getting a result back from a child activity Then, when the user presses the Back button to return to the QuizActivity, the Activ ...

Chapter 5  Your Second Activity The final step is to override onActivityResult(int, int, Intent) in QuizActivity to handle the r ...

How Android Sees Your Activities Finally, modify the checkAnswer(boolean) method in QuizActivity to check whether the user cheat ...

Chapter 5  Your Second Activity Listing 5.18  QuizActivity declared as launcher activity (AndroidManifest.xml) <manifest xmln ...

How Android Sees Your Activities If you run GeoQuiz and press Back from the QuizActivity, the QuizActivity will be popped off th ...

Chapter 5  Your Second Activity What you are seeing here is that the ActivityManager maintains a back stack and that this back s ...

6. Android SDK Versions and Compatibility Now that you have gotten your feet wet with GeoQuiz, let’s review some background mate ...

Chapter 6  Android SDK Versions and Compatibility The percentage of devices using each version changes constantly, of course, bu ...

A sane minimum One of the biggest changes for Android developers came with the release of Honeycomb, Android 3.0. This release w ...

Chapter 6  Android SDK Versions and Compatibility In addition to the minimum supported version, you can also set the target vers ...