内容提供者——查询联系人

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（1）MainActivity

public class MainActivity extends Activity {

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
   List<Contact> queryContacts = QueryContactsUtils.queryContacts(getApplicationContext());
       for (Contact contact:queryContacts) {
           System.out.println("contact"+contact);
       }
   }
}

（2）Contact

public class Contact {
   private String id;
   private String name;
   private String phone;
   private String email;
   public String getId() {
       return id;
   }
   public void setId(String id) {
       this.id = id;
   }
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }
   public String getPhone() {
       return phone;
   }
   public void setPhone(String phone) {
       this.phone = phone;
   }
   public String getEmail() {
       return email;
   }
   public void setEmail(String email) {
       this.email = email;
   }

   @Override
   public String toString() {

       return "Contact [id="+id+",name="+name+",phone="+phone+",email="+email+"]";
   }
}

（3）QueryContactsUtils

public class QueryContactsUtils {

   public static List<Contact> queryContacts(Context context){
       List<Contact> contactLists = new ArrayList<Contact>();
       Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
       Uri dataUri = Uri.parse("content://com.android.contacts/data");
       Cursor cursor = context.getContentResolver().query(uri, new String[]{"contact_id"}, null, null, null);
       while (cursor.moveToNext()) {
           String contact_id = cursor.getString(0);
           if (contact_id!=null) {
               //创建javabean对象
               Contact contact = new Contact();
               contact.setId(contact_id);
               System.out.println("contact_id:"+contact_id);
               Cursor dataCursor = context.getContentResolver().query(dataUri, new String[]{"data1","mimetype"}, "raw_contact_id=?", new String[]{contact_id}, null);
               while (dataCursor.moveToNext()) {
                   String data1 = dataCursor.getString(0);
                   String mimetype = dataCursor.getString(1);

                   if ("vnd.android.cursor.item/name".equals(mimetype)) {
                       contact.setName(data1);
                   }else if ("vnd.android.cursor.item/phone_v2".equals(mimetype)) {
                       contact.setPhone(data1);
                   }else if ("vnd.android.cursor.item/email_v2".equals(mimetype)) {
                       contact.setEmail(data1);
                   }

               }
               contactLists.add(contact);
           }
       }

       return contactLists;

   }
}

（4）配置文件

添加联系人读取权限

<uses-permission android:name="android.permission.READ_CONTACTS"/>

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