NDK獲取android唯一裝置標識

裝置唯一標識只是簡單的將andorid_id 和 serial拼接起來。你也可以使用自己的邏輯進行拼接。

• java 實現
• native 實現

java 實現程式碼

    public static String getUniqueId(Context context) {
        // 獲取 android_id
        String androidID = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);
        // 拼接 serial
 

        return androidID + Build.SERIAL;
    }

native 實現 （將上面的java 程式碼轉化為 jni 程式碼）

 public native String getAndroidId();

extern "C"
JNIEXPORT jstring JNICALL
Java_com_encrypt_MainActivity_getAndroidId(JNIEnv *env, jobject instance) {

    // get contentResolver
    jclass activity = env->GetObjectClass(instance);
    jmethodID method = env->GetMethodID(activity, "getContentResolver"
 
,
                                        "()Landroid/content/ContentResolver;");
    jobject resolverInstance = env->CallObjectMethod(instance, method);

    // get android_id from android Settings$Secure
    jclass androidSettingsClass = env->FindClass("android/provider/Settings$Secure");
    jmethodID methodId = env->GetStaticMethodID(androidSettingsClass, "getString"
 
,
                                                "(Landroid/content/ContentResolver;Ljava/lang/String;)Ljava/lang/String;");
    jstring param_android_id = env->NewStringUTF("android_id");
    jstring android_id = (jstring) env->CallStaticObjectMethod(androidSettingsClass, methodId, resolverInstance,
                                                               param_android_id);

    // get serial num from android Build
    jclass androidBuildClass = env->FindClass("android/os/Build");
    jfieldID SERIAL = env->GetStaticFieldID(androidBuildClass, "SERIAL", "Ljava/lang/String;");
    jstring serialNum = (jstring) env->GetStaticObjectField(androidBuildClass, SERIAL);


    // concat strings
    jclass String_clazz = env->FindClass("java/lang/String");
    jmethodID concat_methodID = env->GetMethodID(String_clazz, "concat",
                                                 "(Ljava/lang/String;)Ljava/lang/String;");
    jstring result = (jstring) env->CallObjectMethod(android_id, concat_methodID, serialNum);


    // release
    env->DeleteLocalRef(param_android_id);
    env->DeleteLocalRef(serialNum);

    return result;
}