|  |  | 
 |  |  |  | 
 |  |  | extern "C" | 
 |  |  | JNIEXPORT jstring | 
 |  |  | Java_com_dayu_qihealonelibrary_tools_BaseNFCHelper_getSafeKey(JNIEnv *env, jobject instance,jobject contextObject) { | 
 |  |  | Java_com_dayu_qihealonelibrary_tools_QHBaseNFCHelper_getSafeKey(JNIEnv *env, jobject instance,jobject contextObject) { | 
 |  |  |     jmethodID getPackageManagerId = (env)->GetMethodID(contextClass, "getPackageManager","()Landroid/content/pm/PackageManager;"); | 
 |  |  |     jmethodID getPackageNameId = (env)->GetMethodID(contextClass, "getPackageName","()Ljava/lang/String;"); | 
 |  |  |     jmethodID signToStringId = (env)->GetMethodID(signatureClass, "toCharsString","()Ljava/lang/String;"); |