android - Jni 接口函数表 - android

typedef const struct JNINativeInterface *JNIEnv;

const struct JNINativeInterface ... = {

NULL,
NULL,
NULL,
NULL,
GetVersion, //获取JNI版本号

DefineClass, //通过指定ClassLoader对象加载类
FindClass, //获取指定的Class类对象

FromReflectedMethod, //通过指定的java.lang.reflect.Method对象获取方法ID
FromReflectedField, //通过指定的java.lang.reflect.Field对象获取字段ID
ToReflectedMethod, //通过指定的方法ID获取java.lang.reflect.Method对象

GetSuperclass, //获取指定类的父类
IsAssignableFrom, //判断指定类是否继承自某类或实现了某个接口

ToReflectedField, //通过指定的字段ID获取java.lang.reflect.Field对象

Throw, //抛出指定的Throwable对象
ThrowNew, //抛出指定的Throwable对象，并制定消息
ExceptionOccurred, //获取未被清空或捕获的异常
ExceptionDescribe, //同printStackTrace()
ExceptionClear, //清除已被抛出的异常
FatalError, //抛出致命错误

PushLocalFrame, 　　//Push/PopLocalFrame函数提供了本地引用管理的简便方法，在该函数对之间的代码段，所有创建的显式本地引用无需手动调用DeleteLocalReference函数释放，PopLocalFrame函数会自动释放这些本地引用
PopLocalFrame,

NewGlobalRef, //创建全局引用，必须被显式清除
DeleteGlobalRef, //清除全局引用
DeleteLocalRef, //清除本地引用，通常本地引用在原生代码返回时会自动清除，但是对于大数据，比如在循环中频繁创建Java对象，而该对象的只在一次循环中有效，这种情况下有必要显式调用DeleteLocalRef以通知VM尽快释放该对象。
IsSameObject, //判断是否为同一对象，可通过该方法判断弱引用是否已被释放(NULL)
NewLocalRef, //创建本地引用
EnsureLocalCapacity, //确保当前线程可以创建指定数量的本地引用

AllocObject, //创建一个新的对象，只分配内存，不调用任何构造方法（cdwang：应该是为了方便通过CallNonvirtual<Type>Method方法调用父类的构造函数初始化对象）
NewObject, //通过指定的构造函数创建对象，变长参数形式
NewObjectV, //同上，va_list形式
NewObjectA, //同上，数组形式

GetObjectClass, //获取对象的Class类对象
IsInstanceOf, //同instanceOf

GetMethodID, //获取实例（非静态）方法的ID

CallObjectMethod, //调用实例方法，object表示返回值类型
CallObjectMethodV,
CallObjectMethodA,
CallBooleanMethod,
CallBooleanMethodV,
CallBooleanMethodA,
CallByteMethod,
CallByteMethodV,
CallByteMethodA,
CallCharMethod,
CallCharMethodV,
CallCharMethodA,
CallShortMethod,
CallShortMethodV,
CallShortMethodA,
CallIntMethod,
CallIntMethodV,
CallIntMethodA,
CallLongMethod,
CallLongMethodV,
CallLongMethodA,
CallFloatMethod,
CallFloatMethodV,
CallFloatMethodA,
CallDoubleMethod,
CallDoubleMethodV,
CallDoubleMethodA,
CallVoidMethod,
CallVoidMethodV,
CallVoidMethodA,

CallNonvirtualObjectMethod, //调用非虚实例方法，通过class对象指定调用哪个类的非虚函数（cdwang:应该是某对象不调用自己的构造类的方法实现，而是调用父类的方法实现，这个方法节省了子类对象向父类对象的强制转换）
CallNonvirtualObjectMethodV,
CallNonvirtualObjectMethodA,
CallNonvirtualBooleanMethod,
CallNonvirtualBooleanMethodV,
CallNonvirtualBooleanMethodA,
CallNonvirtualByteMethod,
CallNonvirtualByteMethodV,
CallNonvirtualByteMethodA,
CallNonvirtualCharMethod,
CallNonvirtualCharMethodV,
CallNonvirtualCharMethodA,
CallNonvirtualShortMethod,
CallNonvirtualShortMethodV,
CallNonvirtualShortMethodA,
CallNonvirtualIntMethod,
CallNonvirtualIntMethodV,
CallNonvirtualIntMethodA,
CallNonvirtualLongMethod,
CallNonvirtualLongMethodV,
CallNonvirtualLongMethodA,
CallNonvirtualFloatMethod,
CallNonvirtualFloatMethodV,
CallNonvirtualFloatMethodA,
CallNonvirtualDoubleMethod,
CallNonvirtualDoubleMethodV,
CallNonvirtualDoubleMethodA,
CallNonvirtualVoidMethod,
CallNonvirtualVoidMethodV,
CallNonvirtualVoidMethodA,

GetFieldID, //获取成员字段ID

GetObjectField, //获取字段值
GetBooleanField,
GetByteField,
GetCharField,
GetShortField,
GetIntField,
GetLongField,
GetFloatField,
GetDoubleField,
SetObjectField, //设置字段值
SetBooleanField,
SetByteField,
SetCharField,
SetShortField,
SetIntField,
SetLongField,
SetFloatField,
SetDoubleField,

GetStaticMethodID, //获取静态方法ID

CallStaticObjectMethod, //调用静态方法
CallStaticObjectMethodV,
CallStaticObjectMethodA,
CallStaticBooleanMethod,
CallStaticBooleanMethodV,
CallStaticBooleanMethodA,
CallStaticByteMethod,
CallStaticByteMethodV,
CallStaticByteMethodA,
CallStaticCharMethod,
CallStaticCharMethodV,
CallStaticCharMethodA,
CallStaticShortMethod,
CallStaticShortMethodV,
CallStaticShortMethodA,
CallStaticIntMethod,
CallStaticIntMethodV,
CallStaticIntMethodA,
CallStaticLongMethod,
CallStaticLongMethodV,
CallStaticLongMethodA,
CallStaticFloatMethod,
CallStaticFloatMethodV,
CallStaticFloatMethodA,
CallStaticDoubleMethod,
CallStaticDoubleMethodV,
CallStaticDoubleMethodA,
CallStaticVoidMethod,
CallStaticVoidMethodV,
CallStaticVoidMethodA,

GetStaticFieldID, //获取静态字段ID

GetStaticObjectField, //获取字段值
GetStaticBooleanField,
GetStaticByteField,
GetStaticCharField,
GetStaticShortField,
GetStaticIntField,
GetStaticLongField,
GetStaticFloatField,
GetStaticDoubleField,

SetStaticObjectField, //设置字段值
SetStaticBooleanField,
SetStaticByteField,
SetStaticCharField,
SetStaticShortField,
SetStaticIntField,
SetStaticLongField,
SetStaticFloatField,
SetStaticDoubleField,

NewString, //通过指定Unicode格式字符数组构造Java String

GetStringLength, //获取Unicode字符的长度
GetStringChars, //获取字符数组
ReleaseStringChars, //通知VM可以释放String和由GetStringChars获取的字符数组

NewStringUTF, //通过指定UTF-8格式字符数组构造Java String
GetStringUTFLength,
GetStringUTFChars,
ReleaseStringUTFChars,

GetArrayLength, //获取数组长度

NewObjectArray, //通过指定的Class类对象和初始元素初始化一个Java对象数组
GetObjectArrayElement, //获取指定索引的对象元素
SetObjectArrayElement, //设置指定索引的对象元素

NewBooleanArray, //构造基本类型的Java数组
NewByteArray,
NewCharArray,
NewShortArray,
NewIntArray,
NewLongArray,
NewFloatArray,
NewDoubleArray,

GetBooleanArrayElements, //获取基本类型元素的C数组
GetByteArrayElements,
GetCharArrayElements,
GetShortArrayElements,
GetIntArrayElements,
GetLongArrayElements,
GetFloatArrayElements,
GetDoubleArrayElements,

ReleaseBooleanArrayElements, //通知VM可以释放Java数组和由前述方法族获取的C数组
ReleaseByteArrayElements,
ReleaseCharArrayElements,
ReleaseShortArrayElements,
ReleaseIntArrayElements,
ReleaseLongArrayElements,
ReleaseFloatArrayElements,
ReleaseDoubleArrayElements,

GetBooleanArrayRegion, //获取子数组
GetByteArrayRegion,
GetCharArrayRegion,
GetShortArrayRegion,
GetIntArrayRegion,
GetLongArrayRegion,
GetFloatArrayRegion,
GetDoubleArrayRegion,
SetBooleanArrayRegion, //设置子数组
SetByteArrayRegion,
SetCharArrayRegion,
SetShortArrayRegion,
SetIntArrayRegion,
SetLongArrayRegion,
SetFloatArrayRegion,
SetDoubleArrayRegion,

RegisterNatives, //映射原生代码
UnregisterNatives,

MonitorEnter,
MonitorExit,

GetJavaVM, //获取当前线程关联的VM

GetStringRegion, //获取子串
GetStringUTFRegion,

GetPrimitiveArrayCritical,
ReleasePrimitiveArrayCritical,

GetStringCritical, // Get/ReleaseStringCritical必须成对出现，语义和Get/ReleaseStringChars一样，但代码段中不能阻塞当前线程，也不能调用任何其他的JNI函数
ReleaseStringCritical,

NewWeakGlobalRef,
DeleteWeakGlobalRef,

ExceptionCheck, //判断是否有挂起的异常

NewDirectByteBuffer,
GetDirectBufferAddress,
GetDirectBufferCapacity
};

android - Jni 接口函数表

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