我想在提取联系人时对联系人进行排序,然后按照联系人姓名给出声明,但没有任何作用。
这是我的代码
public static TreeMap<String, String> getContactsMobileNumbersAndNames(Context context) {
TreeMap<String, String> result = new TreeMap<>();
ContentResolver cr = context.getContentResolver();
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
null, null, null, null);
if (cur.getCount() > 0) {
while (cur.moveToNext()) {
String id = cur.getString(cur.getColumnIndex(ContactsContract.Contacts._ID));
String name = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
if (Integer.parseInt(cur.getString(
cur.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) {
Cursor pCur = cr.query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
new String[]{id}, null);
while (pCur.moveToNext()) {
int phoneType = pCur.getInt(pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE));
if (phoneType == ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE) {
String phoneNo = pCur.getString(pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
result.put(phoneNo, name);
}
}
pCur.close();
}
}
}
cur.close();
return result;
}
答案 0 :(得分:0)
TreeMap是默认情况下根据其键的自然顺序排序的映射。您尝试根据电话号码对联系人进行排序。因此,如果想要处理代码,则需要更改此行:
result.put(phoneNo, name);
这一行:
result.put(name, phoneNo);
此外,您可以在不使用TreeMap的情况下获取已排序的联系人,如下所示:
ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
public void retrieveContactList() {
Cursor phones = null;
try {
phones = activity.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC");
while (phones.moveToNext())
{
String _number = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)).replaceAll("\\s+", "");
String _name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
HashMap<String, String> contact = new HashMap<String, String>();
contact.put("NUMBER", _number);
contact.put("NAME", _name);
contactList.add(contact);
}
phones.close();
} catch ( Exception e ) {}
finally {
if(phones != null){
phones.close();
}
}
}
public void printContacts() {
for (int i = 0; i < contactList.size(); i++) {
Log.v(contactList.get(i).get("NAME"), contactList.get(i).get("NUMBER"));
}
}
但是,如果您坚持使用地图,则无需按排序顺序获取联系人。在getter方法中将它们放在HashMap(键是数字,值是名称)中,然后在读取键和值时,将所有内容从HashMap传输到TreeMap:
treeMap.putAll(hashMap);
现在您可以按排序顺序打印内容。