我有cocos2d:: ValueMap
:
ValueMap map;
map["key1"] = "value1";
map["key2"] = 1;
map["key3"] = true;
我想将它发送到 Java 作为 HashMap<String,Object>
所以我在生成 jobject hashMapObj
的地方编写了以下代码我想用值填充它:
jclass hashMapClass= jniGetInstance.env->FindClass("java/util/HashMap");
jmethodID hashMapInit = jniGetInstance.env->GetMethodID(hashMapClass, "<init>", "(I)V");
jobject hashMapObj = jniGetInstance.env->NewObject(hashMapClass, hashMapInit, values.size());
//javap -s -p java.util.HashMap | grep -A 1 put\(
jmethodID hashMapId = jniGetInstance.env->GetMethodID(hashMapClass, "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
for (auto it : map) { //https://github.com/cocos2d/cocos2d-x/blob/v3/cocos/base/CCValue.h
switch (it.second.getType()) {
case cocos2d::Value::Type::BOOLEAN:
jniGetInstance.env->CallObjectMethod(hashMapObj, hashMapId, "put",
jniGetInstance.env->NewStringUTF(
it.first.c_str()),
it.second.asBool());
break;
//...
default:
break;
}
}
然后我排队了:
jniGetInstance.env->CallObjectMethod(
hashMapObj,
hashMapId,
"put",
jniGetInstance.env->NewStringUTF(
it.first.c_str()),
it.second.asBool());
JNI DETECTED ERROR IN APPLICATION: use of invalid jobject 0xd85d4aa0
编辑
jniGetInstance.env->CallObjectMethod(hashMapObj, hashMapId, "put","someString", true);
失败并出现同样的错误,所以问题出在 hashMapObj
有什么想法吗?
最佳答案
改变
jniGetInstance.env->CallObjectMethod(hashMapObj, hashMapId, "put",
jniGetInstance.env->NewStringUTF(
it.first.c_str()),
it.second.asBool());
到
jniGetInstance.env->CallObjectMethod(hashMapObj, hashMapId,
jniGetInstance.env->NewStringUTF(it.first.c_str()),
it.second.asBool());
因为“put”方法只接受 2 个参数。
还要确保 it.second.asBool()
返回 jboolean
- 它不同于 C++ bool
类型。
关于java - 如何将cocos2d ValueMap作为HashMap发送给Java?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46683950/