【发布时间】:2011-02-07 09:26:28
【问题描述】:
我创建了一个显示所有联系人姓名的 AutoCompleteTextView 框,但是在查看 Android API 之后,我的方法似乎效率很低。
目前我正在抓取所有联系人的光标,将每个姓名和每个联系人 ID 放入两个不同的数组中,然后将名称数组传递给 AutoCompleteTextView。当用户选择一个项目时,我会在上面创建的第二个 id 数组中查找联系人选择的 ID。代码如下:
private ContactNames mContactData;
// Fill the autocomplete textbox
Cursor contactsCursor = grabContacts();
mContactData = new ContactNames(contactsCursor);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.contact_name, mContactData.namesArray);
mNameText.setAdapter(adapter);
private class ContactNames {
private String[] namesArray;
private long[] idsArray;
private ContactNames(Cursor cur) {
namesArray = new String[cur.getCount()];
idsArray = new long[cur.getCount()];
String name;
Long contactid;
// Get column id's
int nameColumn = cur.getColumnIndex(People.NAME);
int idColumn = cur.getColumnIndex(People._ID);
int i=0;
cur.moveToFirst();
// Check that there are actually any contacts returned by the cursor
if (cur.getCount()>0){
do {
// Get the field values
name = cur.getString(nameColumn);
contactid = Long.parseLong(cur.getString(idColumn));
// Do something with the values.
namesArray[i] = name;
idsArray[i] = contactid;
i++;
} while (cur.moveToNext());
}
}
private long search(String name){
// Lookup name in the contact list that we've put in an array
int indexOfName = Arrays.binarySearch(namesArray, name);
long contact = 0;
if (indexOfName>=0)
{
contact = idsArray[indexOfName];
}
return contact;
}
}
private Cursor grabContacts(){
// Form an array specifying which columns to return.
String[] projection = new String[] {People._ID, People.NAME};
// Get the base URI for the People table in the Contacts content provider.
Uri contacts = People.CONTENT_URI;
// Make the query.
Cursor managedCursor = managedQuery(contacts, projection, null, null, People.NAME + " ASC"); // Put the results in ascending order by name
startManagingCursor(managedCursor);
return managedCursor;
}
必须有更好的方法来做到这一点 - 基本上我正在努力了解如何找到用户在 AutoCompleteTextView 中选择的项目。有什么想法吗?
干杯。
【问题讨论】:
标签: android autocomplete