JNI-如何将jshortArray转换为short * [英] JNI - How to convert jshortArray to short *

问题描述

我有一个 dll文件，其中包含 以下功能:

I have a dll file that contains the following function:

unsigned char * EncodingData(short Data[], int Length);

我想调用此本地方法 在Java中.所以我创造了一个 包装器dll ，其中包含与 以上功能

I want to call this native method in java. So I have created one wrapper dll that contains the follwing function corresponding to the above function

JNIEXPORT jcharArray JNICALL Java_com_common_FilterWrapper_EncodingData (JNIEnv * env, jclass cls, jshortArray shortData, jint len)

现在，我正在致电上述 JNI Java中的功能，并且 呼叫成功.

Now I am calling the above JNI function from java and it is being called successfully.

问题:

我想从包装器dll的功能中调用 dll文件的功能，但是我不知道如何转换以下内容:

I want to call the dll file's function from wrapper dll's function but I don't know how to convert the following:

• jshortArray 到 short [] (将数据传递到期望 short [ ] ，而不是 jshortArray )

• jshortArray to short [] (to pass the data to the dll file's function which is expecting short [] and not jshortArray)

unsigned char 到 jcharArray (将值返回给Java函数)

unsigned char to jcharArray (to return the value back to the java function)

注意:包装dll是用VC ++编写的

推荐答案

使用env-> GetShortArrayElements，例如，如果将jshortArray称为sdata_jshort，则short *指针称为short_data_c_pointer，然后

use env->GetShortArrayElements, for example if your jshortArray is called sdata_jshort, your short* pointer is called short_data_c_pointer, then

short_data_c_pointer = env-> GetFloatArrayElements(sdata_jshort，0);

short_data_c_pointer = env->GetFloatArrayElements(sdata_jshort, 0);

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