Mobile Security defender------mobile phone anti-theft page SIM card bindings & Read Contacts

The functions implemented:

• The binding of the SIM card
• Reading contacts

Technical points:

• SIM card Bindings
• Get a start-up broadcast
• Reading contacts
• Use of Simpleadapter
• Data transfer between activity

SIM card Bindings

Ideas:

• Create a Telephonymanager object

Telephonymanager manager = (Telephonymanager) context.getsystemservice (Context.telephony_service);

• Call Getsimserialnumber () to get the SIM card serial number
  String number = Manager.getsimserialnumber ();

Then add number to Sharedpreferences, get permission: read_phone_state

Get a start-up broadcast

We have to make a decision every time the program is turned on, the SIM card stored in the Sharedpreferences data and the current SIM card data to compare, if different send alarm SMS

• Get a start-up broadcast
  Create a class that inherits from Broadcastreceiver
  Register this class with the list of listings and add the following code:

    <intent-filter>      <action android:name="android.intent.action.BOOT_COMPLETED"/>    </intent-filter>

重写onReceive方法：把SharedPreferences中存储的sim卡数据和当前sim卡数据进行对比，如果不同则发送报警短信要获取权限：READ_BOOT_COMPLETE

Reading contacts

This feature requires the use of content provider technology

• Create a Contentresolver object
  Contentresolver resolver = Context.getcontentresolver ();
• By querying the source code of the Android system, we learned that:
  1) through Content://com.android.contacts/raw_contacts
  You can get to contact_id that is, the ID value for each contact.
  2) through Content://com.android.contacts/data
  The database has contact_id mimetype data1 three columns
  So, we can get the data from the following table by contact_id in the table above
  Specific implementation code:

private static finalStringuri_id ="Content://com.android.contacts/raw_contacts"; private static finalStringUri_data="Content://com.android.contacts/data"; private static finalStringMimetype_name="Vnd.android.cursor.item/name"; private static finalStringMimetype_phone="Vnd.android.cursor.item/phone_v2"; list<map<String,String>> data =Newarraylist<map<String,String>> ();//Get a content parserContentresolver resolver = Context.getcontentresolver ();//query user's address book informationUri uriid = Uri.parse (uri_id);        Uri uridata = Uri.parse (Uri_data); Cursor Cursorid = Resolver.query (Uriid,New String[]{"contact_id"},NULL,NULL,NULL); while(Cursorid.movetonext ()) {Stringid = cursorid.getstring (0);if(id! =NULL) {Cursor Cursordata = Resolver.query (Uridata,New String[]{"Data1","MimeType"},"contact_id=?",New String[]{id},NULL); map<String,String> map =Newhashmap<String,String> (); while(Cursordata.movetonext ()) {StringMimeType = cursordata.getstring (1);if(Mimetype_name.equals (MIMETYPE)) {Map.put ("Name", Cursordata.getstring (0)); }if(Mimetype_phone.equals (MIMETYPE)) {Map.put ("Phone", Cursordata.getstring (0));                }} data.add (map);            Cursordata.close (); }} cursorid.close ();returnData }

 获取权限：READ_CONTACT

Use of Simpleadapter
The difficulty lies in two:
1. Look at some messy data types

List<Map<String,*>>

Analysis:
1) Actually it's a list collection
2) Its elements are a bit special, it's a map collection

2. The pit father's constructor parameters

new SimpleAdapter(ContectActivity.this,data,R.layout.contect_item,                new String[]{"name","phone"},new int[]{R.id.tv_contact_item_name,R.id.tv_contact_item_phone});

Well, it's been crying.
Analyze individually:

• First parameter: Context contexts
• Second parameter: The very messy data type passed in
• The third parameter: r.layout.*, the single item layout that you have customized is passed in
• Fourth parameter: Key in the map element of the second parameter
• The fifth parameter: The ID of the control specified in the layout of the third parameter, which corresponds to the fourth parameter, as shown in the code:
  
  • Name-->r.id.tv_contact_item_name
  • Phone-->r.id.tv_contact_item_phone

Transfer of data between activity:

(1) Jump from 1–>2, transfer data from 1–>2

In 1.class:

Intent Intent = new Intent (this,2.class)
Intent.putextras ("key", value);

In 2.class:
Intent Intent = Getintent ();
Intent.getserializableextra ("key"); You can get the data from 1.

(2) Jump from 2–>1, transfer data from 2–>1

-First Step-

In 1.class:
Intent Intent = new Intent (this,2.class);
Startactivityforresult (Intent, 0); Where the number 0 is the request code, in a moment will be used

-Second Step-
In 2.class:
Intent Intent = new Intent ();
Intent.putextra ("key", value);
Setresult (0,intent); Where the number 0 is the return code, in a moment will be used

-Step Three-
In 1.class:
Overriding the parent class method: Onactivityresult

/**requestCode 为请求码*resultCode 为返回码*data为2.class传回来的Intent*/protectedvoidonActivityResult(intint resultCode, Intent data)    {        super.onActivityResult(requestCode, resultCode, data);        ifnull)        {            value = data.getXXXExtra("key");        }    }

Unfinished Technical points:

• The use of two methods of serializing objects

Come on, good night!

Copyright notice: Just out of the original content of the pot, I hope you have help ~

Mobile Security defender------mobile phone anti-theft page SIM card bindings & Read Contacts