Android Native Development Kit Cookbook

Calling static and instance methods from the native code

The previous recipe covers how to access Java fields in NDK. Besides fields, a Java class also has methods. This recipe focuses on calling static and instance methods from JNI.

Getting ready

The code examples require a basic understanding of the JNI primitive types, strings, classes, and instance objects. It is better to make sure you have read the following recipes before going through this recipe:

• Passing parameters and receiving returns in primitive types
• Manipulating strings in JNI
• Manipulating classes in JNI
• Manipulating objects in JNI
• Accessing Java static and instance fields in native code

Readers are also expected to be familiar with Java reflection API.

How to do it…

The following steps ...