Implement interaction between C/C ++ and Android Java-layer functions through JNI

This article from: http://codingnow.cn/cocos2d-x/992.html

Abstr:This article mainly implements two functions: (1) obtain the packagename of the application through the android sdk api, and then pass it to the C ++ layer function. (2) Call the Java-layer function of Android through the C ++ function. A dialog box is displayed, and click the button to exit the program. 1. First, let's take a simple look at the knowledge of JNI. In this article, I have implemented how to call C ++ functions on the android Java layer. To use JNI, you must...

This article mainly implements two functions:
(1) obtain the packagename of the application through the android sdk api, and then pass it to the C ++ layer function.
(2) Call the Java-layer function of Android through the C ++ function. A dialog box is displayed, and click the button to exit the program.
1. First, let's take a simple look at the knowledge of JNI. In this article, I have implemented how to call C ++ functions on the android Java layer. To use JNI, the header file must be included. Android uses ndk to compile C/C ++. Here, JNI. h file is located in: \ android-ndk-r8b \ platforms \ Android-14 \ arch-Arm \ USR \ include \ JNI. h. This file defines all JNI-related data types and interfaces. The following is a code snippet:

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# include <inttypes.h>      /* C99 */typedefuint8_t         jboolean;       /* unsigned 8 bits */typedefint8_t          jbyte;          /* signed 8 bits */typedefuint16_t        jchar;          /* unsigned 16 bits */