Defensive Programming in Android: Errors, Exceptions, and Testing

Defensive Programming in Android: Errors, Exceptions, and Testing

• start the course
• recognize how errors and exceptions can be used in defensive programming
• use the Java exception classes
• use exception stack traces
• test for specific kinds of errors based on domain and code
• create custom Java error classes
• inform end users of error information in an Android app
• use an underlying error object to find out more detail about an error that has occurred
• release Java resources in the event of an exception
• recognize how unit testing can be used in defensive programming
• use the android testing API to construct automated unit tests
• use instrumentation in automated Android unit testing
• use test case classes in Android automated unit testing
• use Android assertion classes
• use mock object classes in Android automated unit testing
• use test runner classes for Android automated unit testing
• view test results in the IDE
• recognize where end-to-end testing can be used in defensive programming
• set up the Android Testing Support API for automated UI testing
• use Espresso test classes for Android automated UI testing
• use instrumentation of activities for Android automated UI testing
• test UI components in Android
• use ViewAction, ViewInteraction, and DataInteraction classes to simulate actions when testing an Android app
• describe the use of assertions for defensive programming in Java for Android
• use basic assert statements in Java for Android
• identify and use precondition, postcondition and invariant assertions
• use annotations to aid in programming defensively for Android
• create a Java app to use exceptions and assertions

Defensive Programming in Android: Input and Methods

Defensive Programming in Android: Input and Methods

• start the course
• identify common assumptions not to make about user input
• create code that handles file inputs to an Android app
• create code that handles URL inputs to an Android app
• validate user-provided input
• use a real-time approach to validating user-provided input
• use secure coding principles to guard against format string attacks
• parse and check input values before using that input in a WebView object
• restrict access to navigation methods in a WebView object
• protect against SQL injection by using parameterized and prepared statements
• recognize best practice in writing methods for Android apps in Java
• use best practices to name methods in Java for Android
• use best practices to name getter methods in Java for Android
• use best practices to name callback methods in Java for Android
• reduce method complexity in Android apps using Java
• use Java overloaded methods to reduce complexity in Java for Android
• recognize how constants can be used in defensive programming
• create and use constants in Java for Android
• use best practices for naming constants in Java for Android
• create and use resource files in an Android app
• recognize how to write if statements defensively to protect against potential bugs
• design while loops that are not vulnerable to running forever
• design for loops that are not vulnerable to running forever
• identify and avoid bugs caused by altered loop variables
• use defensive practices to code in Java

Defensive Programming in Android: Network Access and Java Defensive Techniques

Defensive Programming in Android: Network Access and Java Defensive Techniques

• start the course
• initialize instances of classes safely
• check for the presence of null to avoid errors
• design setters to avoid potential errors
• recognize how to compare two objects in Java avoiding potential errors
• work safely with the Java switch and case statements
• use atomic and nonatomic operations in threaded applications
• use final properties to minimize potential for errors
• recognize when to use mutable and immutable classes
• implement a basic enum in Java
• use enums to reduce the possibility of unexpected input
• implement an enum with a constructor and recognize the rules for enum constructors
• implement an interface in an enum
• create an enum with abstract methods
• use packages and classes to implement proper encapsulation
• import packages in Java Android apps
• use different scopes to implement defensive programming
• create APKs to run on Android devices
• create jars for exporting Java code between apps
• recognize the importance of maintaining a good user experience while accessing the network
• use AsyncTask to retrieve data asynchronously and preserve user experience
• use progress reporting to enhance user experience
• cache retrieved data to enhance user experience
• transfer large files in the background
• check network connectivity status in Android apps
• sanitize data transferred across the network
• create an Android app to access the network asynchronously

Defensive Programming in Android: Using Standards

Defensive Programming in Android: Using Standards

• start the course
• recognize how and where standards promote defensive programming
• identify and use class naming standards in Java
• identify and use variable naming standards in Java
• recognize the proper use of comments to make code more readable and maintainable
• use SQLite prepared statements to protect against SQL attacks
• recognize how both indentation and whitespace can be used to promote defensive programming
• use indentation to make source code more readable and maintainable
• use whitespace to make source code more readable and maintainable
• recognize what it means to keep code simple and how it makes programs more robust
• design classes that have a single and defined focus
• design methods that have a single and defined focus
• perform refactoring in Java
• avoid duplicating code in Java Android apps
• set up dependency management in Apache Maven
• set up dependency management in Gradle
• describe the characteristics of Design by Contract
• use comments to support Design by Contract
• use preconditions to support Design by Contract
• use postconditions to support Design by Contract
• use invariants to support Design by Contract
• use Design by Contract in Java
• use Design by Contract in Android
• create a simple app using Design by Contract principles