Android: 用jni 获取MAC地址

java中实现获取IMEI的DeviceID和MacID的代码：

/*TelephonyManager tm = (TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);	//获取设备id
String deviceId = tm.getDeviceId();
final CharSequence cs = deviceId;
Log.e(TAG, "Key==deviceId==" + cs);

WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);	//获取MacID
WifiInfo info = wifi.getConnectionInfo();
String macID = info.getMacAddress();
final CharSequence ms = macID;
Log.e(TAG, "Key==macID==" + ms);
*/

另外注意AndroidManifest.xml中需要打开权限：

<uses-permission  android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission  android:name="android.permission.ACCESS_WIFI_STATE" />

在jni中实现获取IMEI的DeviceID和MacID的代码：

java的activity类中有

String deviceIdRutrun=ct.nativeGetDeviceId(FdActivity.this);
Log.e(TAG, "Key==deviceIdRutrun==" + deviceIdRutrun);

调用jni的java类中有

public static native String nativeGetDeviceId(Object mContext);

cpp文件中有

JNIEXPORT jstring JNICALL Java_org_samples_CT_nativeGetDeviceId
(JNIEnv *env, jclass, jobject mContext){
//t = (double)getTickCount();

if(mContext == 0){
return env->NewStringUTF("[+] Error: Context is 0");
}
jclass cls_context = env->FindClass("android/content/Context");
if(cls_context == 0){
return env->NewStringUTF("[+] Error: FindClass <android/content/Context> Error");
}

jmethodID getSystemService = (env)->GetMethodID(cls_context, "getSystemService", "(Ljava/lang/String;)Ljava/lang/Object;");
if(getSystemService == 0){
return env->NewStringUTF("[+] Error: GetMethodID failed");
}

jfieldID TELEPHONY_SERVICE = (env)->GetStaticFieldID(cls_context, "TELEPHONY_SERVICE", "Ljava/lang/String;");
if(TELEPHONY_SERVICE == 0){
return env->NewStringUTF("[+] Error: GetStaticFieldID Failed");
}

jstring telephonystr = (jstring)(env)->GetStaticObjectField(cls_context, TELEPHONY_SERVICE);
jobject telephonymanager = ((env)->CallObjectMethod(mContext, getSystemService, telephonystr));
if(telephonymanager == 0){
return env->NewStringUTF("[+] Error: CallObjectMethod failed");
}

jclass cls_TelephoneManager = (env)->FindClass( "android/telephony/TelephonyManager");
if(cls_TelephoneManager == 0){
return env->NewStringUTF("[+] Error: FindClass TelephoneManager failed");
}

jmethodID getDeviceId = ((env)->GetMethodID(cls_TelephoneManager, "getDeviceId", "()Ljava/lang/String;"));
if(getDeviceId == 0){
return env->NewStringUTF("[+] Error: GetMethodID getDeviceID failed");
}

jobject DeviceID = (env)->CallObjectMethod(telephonymanager,getDeviceId);

//macID

jfieldID WIFI_SERVICE = (env)->GetStaticFieldID(cls_context, "WIFI_SERVICE", "Ljava/lang/String;");
if(WIFI_SERVICE == 0){
return env->NewStringUTF("[+] Error: GetStaticFieldID Failed");
}

jstring wifistr = (jstring)(env)->GetStaticObjectField(cls_context, WIFI_SERVICE);
jobject wifimanager = ((env)->CallObjectMethod(mContext, getSystemService, wifistr));
if(wifimanager == 0){
return env->NewStringUTF("[+] Error: CallObjectMethod failed");
}

jclass cls_WifiManager = (env)->FindClass( "android/net/wifi/WifiManager");
if(cls_WifiManager == 0){
return env->NewStringUTF("[+] Error: FindClass cls_WifiManager failed");
}

jmethodID getWifiId = ((env)->GetMethodID(cls_WifiManager, "getConnectionInfo", "()Landroid/net/wifi/WifiInfo;"));
if(getDeviceId == 0){
return env->NewStringUTF("[+] Error: GetMethodID getWifiId failed");
}

jobject wifiInfo = env->CallObjectMethod(wifimanager,getWifiId);

jclass wifiInfoclass = env->GetObjectClass(wifiInfo);

jmethodID getMacId = env->GetMethodID(wifiInfoclass,"getMacAddress","()Ljava/lang/String;");

jobject MacID = env->CallObjectMethod(wifiInfo,getMacId);

/*char DP_IMIE[128]={0};
DP_IMIE = (env)->GetStringUTFChars( DeviceID, 0);

*/
/*char*  DP_IMIE=  jstringTostring(env,(jstring)DeviceID);
LOGI("nativeGetDeviceId_DeviceID==%s",DP_IMIE);
char*  DP_IMIE2=  jstringTostring(env,(jstring)MacID);
LOGI("nativeGetDeviceId_MacID==%s",DP_IMIE2);
*/

//t = ((double)getTickCount() - t)/getTickFrequency();
//LOGI("nativeGetDeviceId_time==%f",t);

return (jstring)DeviceID;

}

测试nativeGetDeviceId的运行时间为0.03s，由于只需要执行一次，所以问题不算大。代码比较乱，可以按需更改。另外，cpp中添加内部方法相当好用，可以更好重用这种jni的调用。

参考文献：



Android: 用jni 获取MAC地址http://www.cnblogs.com/hibraincol/archive/2012/07/04/2575992.html

NativeCode中通过JNI反射调用Java层的代码，以获取IMEI为例http://www.cnblogs.com/rainduck/p/3644124.html