Android通讯录（一）

 理解MimeType:根据查询条件的MimeType 决定Data表的data1~data15的值。

 对于MimeType的值有CommonDataKinds.xxxx.CONTENT_ITEM_TYPE。查询的得到的结果为

 CommonDataKinds.xxxx.xxx。

public class ContactDataModel {

    private Context mContext;

    private ContentResolver mContentResolver;

    public ContactDataModel(Context mContext) {
        this.mContext = mContext;
        mContentResolver=mContext.getContentResolver();
    }

    public List<HashMap<String,String>> getContactsByName(String mName){
        mName=mName.trim();
        List<HashMap<String,String>> list=new ArrayList<HashMap<String,String>>();
        boolean ifQueryAll=false;
        Cursor cn =null;
        Cursor cu= null;//cu姓名游标，cn电话游标
        String selection=null;//查询条件
        ifQueryAll=mName.equals("")?true:false;
        //根据ifQuery判断查询条件
        if (ifQueryAll) {
            selection=Data.MIMETYPE+"='"+CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE+"'";
        }else{
            selection=Data.MIMETYPE+"='"+CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE+"' AND "+
                                        CommonDataKinds.StructuredName.DISPLAY_NAME+"LIKE '%'"+mName+"%'";
        }
        //根据姓名查询出通讯录ID与完整姓名。
        cu=mContentResolver.query(Contacts.CONTENT_URI,new String[]{Data.RAW_CONTACT_ID,StructuredName.DISPLAY_NAME},
 selection, null, null);
        //根据通讯录ID查询电话号码的条件
        selection=Data.MIMETYPE+"='"+CommonDataKinds.Phone.CONTENT_ITEM_TYPE+"' AND "+ Data.RAW_CONTACT_ID+" =? ";
        //执行查询
        while (cu.moveToNext()) {
            String mContactId=String.valueOf(cu.getInt(0));
            cn=mContentResolver.query(Contacts.CONTENT_URI, new String[]{CommonDataKinds.Phone.NUMBER},
                                                    selection, new String[]{mContactId}, null);
            while (cn.moveToNext()) {
                HashMap<String,String> map=new HashMap<String, String>();
                map.put("display_name",cu.getString(1));
                map.put("phone_number",cn.getString(0));
                list.add(map);
            }
        }
        cu.close();
        cn.close();
        return list;
    }
}