# Message Filter 垃圾短信过滤APP
## 中期
### 项目语言
+ web页面:html、css、JavaScript、JQuery、Bootstrap等
+ 安卓前端开发:java
+ 后端服务器:python(flask框架)
### 当前进度
1. 在Android Studio中,用WebView接口实现软件界面(AVD模拟器)显示html页面;
2. 用Android Studio中HttpClient API接口实现前端与后端服务器的链接;
![前后端链接](image/1.png)
3. 点击页面按钮读取全部手机短信,短信数据从前端传到后端,等待处理;
4. 后端(Python Flask)接收短信数据,进行垃圾短信筛选,返回Json数据给前端:
+ 后端使用scikit-learn模块(数据挖掘和数据分析工具),通过其朴素贝叶斯算法API对短信数据进行垃圾短信的识别:
+ 导入中文垃圾短信数据集(80w数据 有垃圾短信和非垃圾短信)
+ 对中文短信进行分词(jieba)精确模式/全模式/搜索引擎模式的测试比较
+ 将分词后的数据集分隔成训练集和测试集:我们需要从训练集数据中产出学习器,再用测试集来测试所得学习器对新样本的判别能力(sklearn的train_test_split()函数)
+ 训练集文本特征提取:文本数据--->特征向量--->tf-idf矩阵
+ CountVectorizer(): 只考虑词汇在文本中出现的频率
+ TfidfVectorizer():除了考量某词汇在文本出现的频率,还关注包含这个词汇的所有文本的数量。能够削减高频没有意义的词汇出现带来的影响, 挖掘更有意义的特征
+ 建立朴素贝叶斯分类器MultinomialNB()并进行训练
+ 利用测试集数据评估分类器
5. 前端通过WebView与JS交互,将垃圾信息数据显示在软件页面上:
![前端与html数据交互](image/2.png)
图中通过javascript:将data数据传输到html里的show()函数
### 问题与思考
+ 垃圾信息数据集的80w数据在数量和质量上都有欠缺,筛选的精度有待提高,需要配合正则表达式等规则引擎增强筛选能力
+ 应满足用户设置黑名单的功能,应该如何实现?
+ 点击黑名单按钮时,应该还是将全部短信数据发送给后端,在后端进行黑名单的匹配,筛选来自黑名单号码的短信返回前端
+ 前端用户设定的黑名单电话簿应保存在手机本地还是数据库?如果存储在本地,则黑名版的匹配过程其实可以在前端用java实现;如果要保存在数据库,如何实现一用户一表格的匹配?(ip地址?用户登录?)
+ 朴素贝叶斯算法原理?
## 结项
>final-useful存储结项提交的内容
* 百度网盘已备份项目进程所有文件
### 技术要点
1. ListView+CheckBox
2. Fragment+ViewPager
3. Sqlite
4. Service
5. BroadcastReceiver
6. ContentProvider
7. Activity
没有合适的资源?快使用搜索试试~ 我知道了~
毕设&课程作业_学校大创项目-智能手机平台电信诈骗识别拦截系统.zip
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