Android 如何制作返回sha1应用程序密钥的本机库

我需要本机的库，它计算sha1键并将其返回给应用程序

我还尝试：

但我不能编译成这样

也许有人有使用本机的经验，可以帮助我。

jstring find（JNIEnv*env、jobject thiz、jobject contexObject）
jstring find(JNIEnv *env, jobject thiz, jobject contexObject) 
{
    jclass contextTemp = env->FindClass("android/content/Context");
    jclass contextClass = (jclass)env->NewGlobalRef(contextTemp);
    jmethodID getPackageManager = env->GetMethodID(contextClass, 
    "getPackageManager",
                                                    "()Landroid/content/pm/PackageManager;");
jobject share = (jobject)env->CallObjectMethod(contexObject, getPackageManager);

jmethodID getPackageName = env->GetMethodID(contextClass, "getPackageName",
                                               "()Ljava/lang/String;");
jstring packageName = (jstring)env->CallObjectMethod(contexObject, getPackageName);
jclass clazz = env->FindClass("android/content/pm/PackageManager");

jfieldID GET_SIGNATURESfid = env->GetStaticFieldID( clazz, "GET_SIGNATURES", "I");
jint GET_SIGNATURES = env->GetStaticIntField(clazz,GET_SIGNATURESfid);
//jclass temp = env->FindClass("android/content/pm/PackageManager");
jclass PackageManagerObj = (jclass)env->NewGlobalRef(clazz);
jmethodID getPackageInfoId = env->GetMethodID(PackageManagerObj, "getPackageInfo",
                                               "(Ljava/lang/String;I)Landroid/content/pm/PackageInfo;");
jobject getPackageInfoObject = (jobject)env->CallObjectMethod(share, getPackageInfoId,
                                            packageName,GET_SIGNATURES);
jclass packageInfoClass = env->FindClass("android/content/pm/PackageInfo");
jfieldID signatures = env->GetFieldID(packageInfoClass,"signatures","[Landroid/content/pm/Signature;");
jobjectArray rows = reinterpret_cast<jobjectArray>(
        env->GetObjectField(getPackageInfoObject,signatures));
int size = env->GetArrayLength(rows);
jclass signaturesClass = env->FindClass("android/content/pm/Signature");
jclass  mEssage = env->FindClass("java/security/MessageDigest");
jclass  MessageDigestClass = (jclass)env->NewGlobalRef(mEssage);
jmethodID mGetInstance = env->GetStaticMethodID(MessageDigestClass,"getInstance","(Ljava/lang/String;)Ljava/security/MessageDigest;");
jmethodID updateMethod = env->GetMethodID(MessageDigestClass,"update","([B)V");
jmethodID toByteArrayMethod = env->GetMethodID(signaturesClass,"toByteArray","()[B");

jclass tempBase64 = env->FindClass("android/util/Base64");
jclass Base64Class = (jclass)env->NewGlobalRef(tempBase64);

jmethodID encodeToStringID = env->GetStaticMethodID(Base64Class,"encodeToString","([BI)Ljava/lang/String;");
jmethodID digest = env->GetMethodID(MessageDigestClass,"digest","()[B");
for(int i = 0 ;i<size;i++){
    jobject messageDigest = env->CallStaticObjectMethod(MessageDigestClass,mGetInstance,env->NewStringUTF("SHA"));
    jobject signature = env->GetObjectArrayElement(rows,i);
    env->CallVoidMethod(messageDigest,updateMethod,(jbyteArray)env->CallObjectMethod(signature,toByteArrayMethod));
    return (jstring)env->CallStaticObjectMethod(Base64Class,encodeToStringID,env->CallObjectMethod(messageDigest,digest),(jint)0);
}
return env->NewStringUTF("");

{
jclass contextTemp=env->FindClass（“android/content/Context”）；
jclass contextClass=（jclass）env->NewGlobalRef（contextTemp）；
jmethodID getPackageManager=env->GetMethodID（contextClass，
“getPackageManager”，
“（）Landroid/content/pm/PackageManager；”；
jobject share=（jobject）env->CallObjectMethod（contexObject，getPackageManager）；
jmethodID getPackageName=env->GetMethodID（contextClass，“getPackageName”，
“（）Ljava/lang/String；”；
jstring packageName=（jstring）env->CallObjectMethod（contexObject，getPackageName）；
jclass clazz=env->FindClass（“android/content/pm/PackageManager”）；
jfieldID GET_signatureFID=env->GetStaticFieldID（clazz，“GET_SIGNATURES”，“I”）；
jint GET_SIGNATURES=env->GetStaticIntField（clazz，GET_SIGNATURESfid）；
//jclass temp=env->FindClass（“android/content/pm/PackageManager”）；
jclass PackageManagerObj=（jclass）env->NewGlobalRef（clazz）；
jmethodID getPackageInfo=env->GetMethodID（PackageManagerObj，“getPackageInfo”，
“（Ljava/lang/String；I）Landroid/content/pm/PackageInfo；”；
jobject GetPackageInfo对象=（jobject）env->CallObjectMethod（共享，GetPackageInfo，
packageName，获取_签名）；
jclass-PackageInfo class=env->FindClass（“android/content/pm/PackageInfo”）；
jfieldID signatures=env->GetFieldID（PackageInfo类，“signatures”，“[Landroid/content/pm/Signature；”；
jobjectArray行=重新解释(
env->GetObjectField（getPackageInfo对象，签名））；
int size=env->GetArrayLength（行）；
jclass SignatureClass=env->FindClass（“android/content/pm/Signature”）；
jclass mEssage=env->FindClass（“java/security/MessageDigest”）；
jclass MessageDigestClass=（jclass）env->NewGlobalRef（消息）；
jmethodID mGetInstance=env->GetStaticMethodID（MessageDigestClass，“getInstance”，“Ljava/lang/String；）Ljava/security/MessageDigest；”；
jmethodID updateMethod=env->GetMethodID（MessageDigestClass，“update”，“（[B）V”）；
jmethodID toByteArrayMethod=env->GetMethodID（SignatureClass，“toByteArray”，“（）[B”）；
jclass tempBase64=env->FindClass（“android/util/Base64”）；
jclass Base64Class=（jclass）env->NewGlobalRef（tempBase64）；
jmethodide encodeToStringID=env->GetStaticMethodID（Base64Class，“encodeToString”，“（[BI）Ljava/lang/String；”；
jmethodide digest=env->GetMethodID（messagedigest类，“digest”，“（）[B”）；
对于（int i=0；iCallStaticObjectMethod（MessageDigestClass、mGetInstance、env->NewStringUTF（“SHA”）；
jobject signature=env->GetObjectArrayElement（行，i）；
env->CallVoidMethod（messageDigest，updateMethod，（jbyteArray）env->CallObjectMethod（signature，toByteArrayMethod））；
return（jstring）env->CallStaticObjectMethod（Base64Class，encodeToStringID，env->CallObjectMethod（messageDigest，digest），（jint）0）；
}
返回env->NewStringUTF（“”）；

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非常疯狂，如果你喜欢…

它的可能副本并不复杂。我需要本机代码中的sha1，而不是java。请详细说明如何使用你的函数及其实际功能。这将帮助读者理解你答案的内容。