我如何检查 android 数据库中是否存在特定联系人以将其添加到数据库中，问题是如果我检查联系人姓名可能有另一个同名联系人所以任何人都可以帮助我，我的代码是:
String where = ContactsContract.RawContacts.DISPLAY_NAME_PRIMARY+" = ? AND "+
ContactsContract.RawContacts.ACCOUNT_TYPE + " = ? AND "+
ContactsContract.RawContacts.ACCOUNT_NAME+" = ?";
String[] whereArg = new String[] {displayName, AccountType, AccountName};
Cursor SameName = cResolver.query(ContactsContract.RawContacts.CONTENT_URI, null, where, whereArg,null);
if (SameName == null || SameName.getCount() == 0) {
// the addContact method
}else {
// do nothing, the contact is exsist
}
最佳答案
很简单，只要执行一个查询就可以了
String query ="SELECT * FROM " + TABLE_NAME + " WHERE displayName " + " = whateverNameYouWantToCheckFor" ;
/*To avoid confusions of different contacts having the same name, extended the search criteria, by including other fields during the query.*/
Cursor c = cResolver.rawQuery(query,null);
int duplicate = c.getCount(); // If there is a row containing the searched name then the count of the cursor will not be 0.
if(duplicate !=0)
{
//Code to do whatever you want when the name exists already.
}
else
{
//Code to do whatever you want when the name does not exist.
}
希望对你有帮助
关于android - 如何检查联系人是否存在于数据库android中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13670897/