Android JNI ANT

标签：android   jni   ani   

上篇讲的是JNI的入门，http://blog.csdn.net/chaoyue0071/article/details/45098009

例子讲了一个.java文件到.h .cpp文件的映射。那当多个.java文件或是自己一个.java对应多个.h .cpp文件？？那么就要用到Ant啦

在我们的HelloNDK工程中添加GetInt类和方法。

public class GetInt {
	public static native int getInt(int a);
}

<?xml version="1.0" encoding="UTF-8"?>
<!-- ====================================================================== 
     Apr 16, 2015 11:46:52 AM                                                        

     HelloNDK    
     description
                   
     linchaoyue                                                                
     ====================================================================== -->
<project name="HelloNDK" default="BuildAllHeaders">
    <description>
            description
    </description>

    <!-- ================================= 
          target: BuildAllHeaders              
         ================================= -->
    <target name="BuildAllHeaders" >
        <antcall target="BuildGetStringHeader"></antcall>
        <antcall target="BuildGetIntHeader"></antcall>
    </target>

    <!-- - - - - - - - - - - - - - - - - - 
          target: depends                      
         - - - - - - - - - - - - - - - - - -->
    <target name="BuildGetStringHeader">
    	<javah destdir="./jni" classpath="./bin/classes/" class="com.example.hellondk.GetString"></javah>
    </target>
    <!-- - - - - - - - - - - - - - - - - - 
          target: depends                      
         - - - - - - - - - - - - - - - - - -->
    <target name="BuildGetIntHeader">
    	<javah destdir="./jni" classpath="./bin/classes/" class="com.example.hellondk.GetInt"></javah>
    </target>

</project>

这样就实现了多个.java文件的编译。

还有一总情况是一个.java对应多个.h文件呢？

我在GetString类中增加方法

public static native String getWord();

Hello.h

/*
 * Hello.h
 *
 *  Created on: Apr 17, 2015
 *      Author: linchaoyue
 */

#ifndef HELLO_H_
#define HELLO_H_

class Hello {
public:
	Hello();
	char * getWords();
	virtual ~Hello();
};

#endif /* HELLO_H_ */

/*
 * Hello.cpp
 *
 *  Created on: Apr 17, 2015
 *      Author: linchaoyue
 */

#include <Hello.h>

Hello::Hello() {
	// TODO Auto-generated constructor stub

}
char * Hello::getWords(){
	return "hello c++";
}

Hello::~Hello() {
	// TODO Auto-generated destructor stub
}

/*
 * Class:     com_example_hellondk_GetString
 * Method:    getWord
 * Signature: ()Ljava/lang/String;
 */
JNIEXPORT jstring JNICALL Java_com_example_hellondk_GetString_getWord
  (JNIEnv *, jclass);

接下来要注意！！需要在Android.mk文件中，在LOCAL_SRC_FILES配置中添加Hello.cpp

LOCAL_SRC_FILES := HelloNDK.cpp Hello.cpp

Project 的Build All一下。就可以了

Android JNI ANT

标签：android   jni   ani   

原文地址：http://blog.csdn.net/chaoyue0071/article/details/45098981