在我的应用程序中,我只需要获取10个联系人,当我按下一个按钮等时,接下来将会获取10个联系人。
protected String doInBackground(String... args) {
i = 0;
count = 0;
ContentResolver cr = getContentResolver();
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null,
null, null, null);
names = new String[cur.getCount()];
phone = new String[cur.getCount()];
if ((cur.getCount() > 0)) {
if (count < 5) {
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() && i < 5) {
String phoneNo = pCur
.getString(pCur
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
names[i] = name;
phone[i] = phoneNo;
if (i == 0)
fulldata += "\"" + i + "\"" + ":" + "{"
+ "\"" + "phone" + "\"" + ":"
+ "\"" + phoneNo + "\"" + "}";
else
fulldata += "," + "\"" + i + "\"" + ":"
+ "{" + "\"" + "phone" + "\"" + ":"
+ "\"" + phoneNo + "\"" + "}";
i++;
}
pCur.close();
}
count++;
}
}
}
return null;
}
// {_action:addcontacts,contacts:{"0":{"phone":"8098098"},"1":{"phone":"8098090"},"2":{"phone":"8096879"}}}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
fulldata += "}";
Log.i("all data to post", "" + fulldata);
new UpdateContacts().execute();
}
}
我从这个代码块中获取所有联系人但我需要在列表中获取特定的(10)联系人数量,当我点击下一个按钮时,它应该获取下一个(10个数字)数字列表
答案 0 :(得分:1)
我会选择LIMIT功能。
SELECT * FROM table LIMIT 10
- &gt;得到前10条记录
SELECT * FROM table LIMIT 10, 10
- &gt;第10行后获得10条记录
ContentResolver cr = getContentResolver();
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, "LIMIT 10, " + count);
count += 10;
希望这有帮助。
答案 1 :(得分:0)
正确的方法是在查询中添加LIMIT和OFFSET限定符。示例:
select * from MyTable where <whatever> limit 10 offset 30;
这将获得30-39行。
你是否可以通过cr.query()调用来完成这项工作,我不知道。