android:获取联系人信息（姓名和电话）

public void getUserInfo(){
       Cursor cursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
       while(cursor.moveToNext()){
           String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
           String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
           Log.d(TAG    , "Name is : "+name);
           int isHas = Integer.parseInt(cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER)));
           if(isHas>0){
               Cursor c = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null,
                        ContactsContract.CommonDataKinds.Phone.CONTACT_ID+ " = " + id,null,null);
               while(c.moveToNext()){
                   String number = c.getString(c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                   Log.d(TAG    , "Number is : "+number);
               }
               c.close();
           }
       }
       cursor.close();
}
有时候也会遇到根据号码找联系人的情况，及时提示用户。
private String getNameFromPhone(String number) {
        String name = null;
        String[] projection = { ContactsContract.PhoneLookup.DISPLAY_NAME,
                ContactsContract.CommonDataKinds.Phone.NUMBER };

        Cursor cursor = this.getContentResolver().query(
                ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                projection, // Which columns to return.
                ContactsContract.CommonDataKinds.Phone.NUMBER + " = '"
                        + number + "'", // WHERE clause.
                null, // WHERE clause value substitution
                null); // Sort order.

        if (cursor == null) {
            Log.d(TAG, "getPeople null");
            return null;
        }
        Log.d(TAG, "getPeople cursor.getCount() = " + cursor.getCount());
        for (int i = 0; i < cursor.getCount(); i++) {
            cursor.moveToPosition(i);

            int nameFieldColumnIndex = cursor
                    .getColumnIndex(ContactsContract.PhoneLookup.DISPLAY_NAME);
            name = cursor.getString(nameFieldColumnIndex);
            Log.i(TAG, "" + name + " .... " + nameFieldColumnIndex);
            
            
        }
        cursor.close();
        return name;
        
    }