Mobile phone theft prevention

1. sharedpreference (save some property settings of the program, one of which is Android data storage)

Used to save user settings

Whether the anti-theft function is enabled

Save the Security number (after your mobile phone is stolen, the mobile phone number used by the thief will be sent to your mailbox)

Saves information about the current SIM card of the user.

2. broadcastreceiver broadcast Receiver Enable the Boot Check (the thief must change the SIM card after obtaining the mobile phone, so we can perform the boot check to determine whether the information and settings in the mobile phone have changed) (there will be a broadcast at the boot, broadcastreceiver is doing this.) Detect received SMS messages 3. telephoneymanager (telephone operations)

Obtain SIM card information

4. smsmanager (SMS operations) Send SMS