JNI传递的char *二维数组JAVA code [英] JNI Pass Char* 2D array to JAVA Code
本文介绍了JNI传递的char *二维数组JAVA code的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想通过从JNI层通过下列指针列C code
的char *结果[MAXTEST] [MAXRESPONSE] = {
{12,12,},
{8,3,},
{29,70,},
{5,2,},
{42,42,}
};
在Java的code我写了下面的声明
公共静态本地字符串[] []的getResult();
我很困惑如何通过JNI层到Java code数组?以下是JNI层描述
JNIEXPORT jobjectArray JNICALL Java_com_example_CheckResult_getResult
(JNIEnv的* ENV,JCLASS THIZ){
困惑在这里????
}
解决方案
后,终于在JOP的工作时间共享<一个href=\"http://stackoverflow.com/questions/6070679/create-populate-and-return-2d-string-array-from-native-$c$c-jni-ndk\">link,我可以解决我的问题。在code云如下:
JNIEXPORT jobjectArray JNICALL Java_com_example_CheckResult_getResult(JNIEnv的* ENV,JCLASS THIZ){
jboolean标志= JNI_TRUE;
JCLASS stringClass =(* ENV) - GT;的findClass(ENV,爪哇/郎/字符串);
jobjectArray排;
jobjectArray行; jsize I,J;
对于(I = 0; I&小于5;我++){
行=(* ENV) - GT; NewObjectArray(ENV,MAXRESPONSE,stringClass,0);
为(J = 0; J&下; 3; J ++){
(* ENV) - GT; SetObjectArrayElement(ENV,行,J,(* ENV) - GT; NewStringUTF(ENV,userResponse [I] [J]));
} 如果(标志== JNI_TRUE){
标志= JNI_FALSE;
行=(* ENV) - &GT; NewObjectArray(ENV,MAXTEST,(* ENV) - &GT; GetObjectClass(ENV,行),0);
} (* ENV) - GT; SetObjectArrayElement(ENV,行,我行);
} 返回行;
}
I want to pass the following pointer array through the JNI layer from C code
char *result[MAXTEST][MAXRESPONSE] = {
{ "12", "12", "" },
{ "8", "3", "" },
{ "29", "70", "" },
{ "5", "2", "" },
{ "42", "42", "" }
};
In java code I have written the following declaration
public static native String[][] getResult();
I am confused how to pass that array through JNI layer to Java code??? Following is the JNI layer description
JNIEXPORT jobjectArray JNICALL Java_com_example_CheckResult_getResult
(JNIEnv *env, jclass thiz) {
Confused over here ????
}
解决方案
Finally after hours working on jop's shared link, I could solve my problem. The code goes as below:
JNIEXPORT jobjectArray JNICALL Java_com_example_CheckResult_getResult(JNIEnv *env, jclass thiz) {
jboolean flag = JNI_TRUE;
jclass stringClass = (*env)->FindClass(env, "java/lang/String");
jobjectArray row;
jobjectArray rows;
jsize i, j;
for(i=0; i<5; i++) {
row = (*env)->NewObjectArray(env, MAXRESPONSE, stringClass, 0);
for(j=0; j<3; j++) {
(*env)->SetObjectArrayElement(env, row, j, (*env)->NewStringUTF(env, userResponse[i][j]));
}
if(flag == JNI_TRUE) {
flag = JNI_FALSE;
rows = (*env)->NewObjectArray(env, MAXTEST, (*env)->GetObjectClass(env, row), 0);
}
(*env)->SetObjectArrayElement(env, rows, i, row);
}
return rows;
}
这篇关于JNI传递的char *二维数组JAVA code的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文