我正在学习如何开发Android应用程序。但是我很难找到联系人的手机。
我能够使用以下代码列出所有联系人:
private static final String[] contactProjetion = new String[]{
ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.Contacts.HAS_PHONE_NUMBER
};
private void getContacts() {
Cursor cursorContacts = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, contactProjetion, null, null, ContactsContract.Contacts.DISPLAY_NAME);
while (cursorContacts.moveToNext()) {
String id = cursorContacts.getString(0);
String name = cursorContacts.getString(1);
String hasPhone = cursorContacts.getString(2);
}
}
但是当使用相同的逻辑搜索联系人的电话时:
String[] phoneProjetion = new String[]{
ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
ContactsContract.CommonDataKinds.Phone.NUMBER
};
Cursor cursorPhone = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, phoneProjetion, null, null, ContactsContract.CommonDataKinds.Phone.NUMBER);
while (cursorContacts.moveToNext()) {
String phone = cursorPhone.getString(1); // this line throw android.database.CursorIndexOutOfBoundsException
}
我有以下例外:
Caused by: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 2
有谁能够帮我?
我相信你正试图访问错误的光标。
基本上,该消息表示您正在尝试从第一行(位置-1)之前的cursorPhone访问该行。这是因为没有向cursorPhone cusror发出move指令,而是发出了cursorContacts游标的移动(迭代)。
代替 :-
while (cursorContacts.moveToNext()) {
String phone = cursorPhone.getString(1); // this line throw android.database.CursorIndexOutOfBoundsException
}
我认为你应该使用: -
while (cursorPhone.moveToNext()) { //<<<< CHANGED
String phone = cursorPhone.getString(1); // this line throw android.database.CursorIndexOutOfBoundsException
}