[RK3399][Android7.1] 调试笔记 --- JNI中的char*和byte[]数据转换

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Platform: RK3399
OS: Android 7.1
Kernel: v4.4.83

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• *char 转换成 byte[]

byte[]在JNI层的类型是jbyteArray.

void audio_callback(char *buffer, int len) {
	jbyteArray array = (*env)->NewByteArray(env, len);
	(*env)->SetByteArrayRegion(env,array ,0,len, (jbyte*)buffer);
	//回调Java层方法
	(*env)->CallVoidMethod(env, obj, methodid, array, len);
	//删除局部引用，否则会内存泄漏
	(*env)->DeleteLocalRef(env, array);
 }

• **byte[]转换成char * **

char* jbytearray_to_char(jbyteArray array) {
    int len = (*env)->GetArrayLength (array);
    char* buffer = new char[len];
    (*env)->GetByteArrayRegion (array, 0, len, (jbyte*)buf);
    return buffer ;
}

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参考：
A correct way to convert byte[] in java to unsigned char* in C++, and vice versa?