Mobile Security Defender 05

1. Get System Contact information

2. Understand the Contactsprovider content provider app for your system
   
   1. Com.android.providers.contacts Bag
   2. Contact2.db Database
   3. Table Raw_contacts (Contact_id,display_name)
      CONTACT_ID 3 4
      Save the ID of each contact, one contact_id per contact
   4. Table data (mimetype_id,raw_contact_id,)
      Save the contact's data by raw_contact_id to identify which contact the data belongs to and identify the type of the data by mimetype_id
   5. Table Mimetypes: Represents the type of data
   6. View: view_data: Integrating data tables and Mimetypes tables
4. Get contact data from a content provider
   
   • Authentication, permissions: Com.android.contacts or Contacts (previous version of authentication)
   • Accessing the uri:content://com.android.contacts/raw_contacts of the Raw_contacts table
   • Accessing the Uri:content://com.android.contacts/data of the View_data table
   • Access to the system's contact information requires permission
     
     • Android.permission.READ_CONTACTS
     • Android.permission.WRITE_CONTACTS
6. Show and get selected contacts
   
   1. displaying system contact information for queries through the ListView
      A detailed description of the ListView
      See: http://www.cnblogs.com/devinzhang/archive/2012/01/20/2328334.html
      With Baseadapter
   2. When you select a contact, you should callback the data to the security Number edit box.

, 2, mobile phone anti-theft function realization

 手机定位 、 报警音乐 、 远程擦除数据、 远程锁屏

1. How to accept Instructions
In the way of message push:
-Push messages in the form of sockets
Socket It is a long-connected protocol, and the HTTP protocol is a short-connection protocol, the socket communication may be connected by a firewall (connection but no message-inactive connections will be considered to consume memory will be digested by the firewall)

       解决方法： 采取心跳机制方式来解决（每隔一段时间发送空包或者几字节的信息，会耗流量，但是会保持活跃状态）      不足： 必须要有联互联网    - 通过移动运营商的短信方式实现推送消息 （不能欠费、要有移动信号，扣费）

(This project is the use of this)

    - 采用第三方应用框架实现推送      1. 即时通信框架 ：xmpp       

1. Send instructions by SMS

   1. Define a broadcast receiver that subscribes to text messages
      Steps:
      
      1. Inherit broacastreceive, rewrite OnReceive (), and get SMS via intent
      2. Register the receiver and subscribe to SMS broadcast events
         Android.provider.Telephony.SMS_RECEIVED
      3. Set priority android:priority= "1000"
      4. Truncation of broadcast delivery
         Abortbroadcast ();
         5. Need permission to receive SMS: Android.permission.RECEIVE_SMS
   2. Mobile Location function
      
      1. Mobile positioning method (Baidu map)
         
         • GPS positioning, Beidou navigation
         • WiFi Location: Network location (IP address), not very accurate
         • Base station positioning (Huawei, ZTE)
      2. Location positioning of Android implementations
         Locationmanager:
         Permission required to get location information
   3. Play Alarm music function

   4. One Button lock screen function

   5. Remote Erase Data feature

Mobile Security Defender 05