删除组中的所有联系人
问题描述:
我想从定义的组中删除所有联系人,但我不知道如何从联系人表和组表中进行联接(如果可能的话)。删除组中的所有联系人
ContentResolver cr = getContentResolver();
String where = ContactsContract.Groups.TITLE + " =='LolGroup'";
Cursor cursor = cr.query(
ContactsContract.Contacts.CONTENT_URI, null, where, null, null);
while (cursor.moveToNext()) {
String lookupKey = cursor.getString(
cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Uri uri = Uri.withAppendedPath(
ContactsContract.Contacts.CONTENT_LOOKUP_URI, lookupKey);
cr.delete(uri, null, null);
}
当然,它给了我一个错误,因为没有“标题”联系人组,但如果我做一个与ID加入我应该得到我想要的东西。
任何想法如何做到这一点?
答
它看起来很奇怪,因为ContactsContract.Contacts没有ContactsContract.Groups.TITLE列。所以我认为你可以用你想要的组标题获得组ID,然后用组ID来搜索联系人。这个想法可能会像下面这样:
public String getGroupIdByTitle(String groupTitle){
try {
cursor = mContentResolver.query(
ContactsContract.Groups.CONTENT_URI,
new String[] {Groups._ID},
Groups.TITLE + "=?",
new String[]{groupTitle},
null);
while (cursor.moveToNext()){
return cursor.getString(cursor.getColumnIndex(0);
}
} finally {
if (cursor!=null) cursor.close();
}
return "";
}
public String getGroupIdOfContact(String lookupKey) {
String where = String.format("%s=? AND %s=?", Data.LOOKUP_KEY, Data.MIMETYPE);
String[] whereArgs = {lookupKey, GroupMembership.CONTENT_ITEM_TYPE};
String groupRowId = "";
Cursor cursor = mContentResolver.query(
Data.CONTENT_URI,
new String[]{GroupMembership.GROUP_ROW_ID},
where, whereArgs, null);
try {
if (cursor.moveToNext()) {
return cursor.getString(cursor.getColumnIndex(GroupMembership.GROUP_ROW_ID));
}
} finally {
if (cursor!=null) cursor.close();
}
return "";
}
public void deleteContactByGroupTitle(String groupTitle) {
String targetGroupId = getGroupIdByTitle(groupTitle);
Cursor cursor = null;
try {
cursor = mContentResolver.query(Contacts.CONTENT_URI, null, null, null, null);
while (cursor.moveToNext()){
String lookupKey = cursor.getString(cursor.getColumnIndex(Contacts.LOOKUP_KEY));
String groupId = getGroupIdOfContact(lookupKey);
if (targetGroupId.equals(groupId)){
//TODO. delete this contact
}
}
} finally {
if (cursor!=null) cursor.close();
}
}
上面的代码没有测试过,但我认为基本的想法是一样的。