Android Native Development Kit Cookbook

Checking errors and handling exceptions in JNI

JNI functions can fail because of system constraint (for example, lack of memory) or invalid arguments (for example, passing a native UTF-8 string when the function is expecting a UTF-16 string). This recipe discusses how to handle errors and exceptions in JNI programming.

Getting ready

The following recipes should be read first before proceeding with this recipe:

• Manipulating strings in JNI
• Managing references in JNI
• Accessing Java static and instance fields in native code
• Calling static and instance methods from native code

How to do it…

Follow these steps to create a sample Android project that illustrates errors and exception handling in JNI:

1. Create a project named ExceptionHandling. Set the package ...