Lab 4: Mastering the Android App debug method and adding a new interface

Fourth chapter, Android application debugging method code listing 4-1 comment out a line of key code (QUIZACTIVITY.JAVA)

Code Listing 4-2 commenting out a line of key code (QUIZACTIVITY.JAVA)

Code Listing 4-3 Convenient and practical debug mode (Quizactivity.java)

Code Listing 4-4 Goodbye, old Friend (Log.d () method) (Quizactivity.java)

Code Listing 4-5 Cancellation code comment (Quizactivity.java)

Code listing 4-6 Mismatched object types (Quizactivity.java)

Code Listing 4-7 correcting type mismatch code errors (Quizactivity.java)

Fifth chapter, add new interface

Code Listing 5-1 Adding a string resource (Strings.xml)

Code Listing 5-2 layout component definition for the second activity (Activity_cheat.xml)

Code Listing 5-3 overrides OnCreate (...) Method (Cheatactivity.java)

Listing 5-4 is declared in the manifest configuration file cheatactivity (androidmanifest.xml)

Code Listing 5-5 Add Cheat button (layout/activity_quiz.xml) in default layout

Listing 5-6 Adding the cheat button to the horizontal layout (layout-land/activity_quiz.xml)

Code listing 5-7 Enabling the Cheat button (Quizactivity.java)

Listing 5-8 starting cheatactivity (Quizactivity.java)

Code listing 5-9 Adding extra constants (Cheatactivity.java)

Listing 5-10 attaching extra to intent (Quizactivity.java)

Code Listing 5-11 getting extra information (Cheatactivity.java)

Code listing 5-12 enabling cheat mode (Cheatactivity.java)

Code Listing 5-13 calls Startactivityforresult (...) Method (Quizactivity.java)

Listing 5-14 Setting the result value (Cheatactivity.java)

Code Listing 5-15 Onactivityresult (...) Implementation of the method (Quizactivity.java)

Code listing 5-16 changing toast messages based on Mischeater variable values (Quizactivity.java)

Code Listing 5-17 Quizactivity is designated as launcher activity (androidmanifest.xml)

Lab 4: Mastering the Android App debug method, adding a new interface