按日期游标查询顺序
Cursor query order by Date
我有一个 TextView,我要将有生日的联系人放入其中:
private String loadContacts()
{
StringBuilder builder = new StringBuilder();
ContentResolver cr = getContentResolver();
Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI,
null, null,
null, null);
if (cursor.getCount() > 0){
while (cursor.moveToNext()){
String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
String columns[] = {
ContactsContract.CommonDataKinds.Event.START_DATE,
ContactsContract.CommonDataKinds.Event.TYPE,
ContactsContract.CommonDataKinds.Event.MIMETYPE,
};
String where = ContactsContract.CommonDataKinds.Event.TYPE + "=" +
ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY +
" and " + ContactsContract.CommonDataKinds.Event.MIMETYPE +
" = '" + ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE +
"' and " + ContactsContract.Data.CONTACT_ID + " = " + id;
String sortOrder = ContactsContract.CommonDataKinds.Event.START_DATE + " ASC";
Cursor birthdayCur = cr.query(ContactsContract.Data.CONTENT_URI, columns, where,
null, sortOrder);
if (birthdayCur.getCount() > 0) {
while (birthdayCur.moveToNext()) {
String birthday = birthdayCur.getString(birthdayCur.
getColumnIndex(ContactsContract.CommonDataKinds.Event.START_DATE));
builder.append("Contact: ").append(name).append(" ").append(birthday).append("\n\n");
}
}
birthdayCur.close();
}
}
cursor.close();
return builder.toString();
}
然后在"onCreate"函数
上分配联系人
if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED)
{
ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.READ_CONTACTS }, 1);
} else {
listContacts.setText(loadContacts());
}
这行代码:
String sortOrder = ContactsContract.CommonDataKinds.Event.START_DATE + " ASC";
Cursor birthdayCur = cr.query(ContactsContract.Data.CONTENT_URI, columns, where,
null, sortOrder);
无论我在那里订购什么(名称、_ID 等)似乎都不起作用。
我正在尝试按生日排序,但即使我尝试按姓名排序也不起作用。为什么?
我是不是使用了错误类型的视图 (TextView),还是我使用 StringBuilder 设置文本的方式或其他完全不同的方式?
我的 minSdkVersion 是 19,targetSdkVersion 是 26。我正在我的 Nexus5(api 23 android 6.01)调试模式下测试这个应用程序。
感谢任何建议。
好吧,这就是我匆忙时发生的事情。其实很简单。
我只需要将所有需要的列放在第一个 Cursor 中,第二个更重要的是使用 "ContactsContract.Data.CONTENT_URI"
而不是 "ContactsContract.Contacts.CONTENT_URI" 因为 "DATA.CONTENT_URI" 实际上有我需要的所有列而 "Contacts.CONTENT_URI" 没有。
就这么简单。
private String loadContacts()
{
StringBuilder builder = new StringBuilder();
ContentResolver cr = getContentResolver();
String columns[] = {
ContactsContract.CommonDataKinds.Event.START_DATE,
ContactsContract.Contacts.DISPLAY_NAME
};
String where = ContactsContract.CommonDataKinds.Event.TYPE + "=" +
ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY +
" and " + ContactsContract.CommonDataKinds.Event.MIMETYPE +
" = '" + ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE + "'";
String sortOrder = ContactsContract.CommonDataKinds.Event.START_DATE + " ASC";
Cursor cursor = cr.query(ContactsContract.Data.CONTENT_URI,
columns, where,
null, sortOrder);
if (cursor.getCount() > 0){
while (cursor.moveToNext()){
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
String birthday = cursor.getString(cursor.
getColumnIndex(ContactsContract.CommonDataKinds.Event.START_DATE));
builder.append("Contact: ").append(name).append(birthday).append(" ").append("\n\n");
}
}
cursor.close();
return builder.toString();
}
我有一个 TextView,我要将有生日的联系人放入其中:
private String loadContacts()
{
StringBuilder builder = new StringBuilder();
ContentResolver cr = getContentResolver();
Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI,
null, null,
null, null);
if (cursor.getCount() > 0){
while (cursor.moveToNext()){
String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
String columns[] = {
ContactsContract.CommonDataKinds.Event.START_DATE,
ContactsContract.CommonDataKinds.Event.TYPE,
ContactsContract.CommonDataKinds.Event.MIMETYPE,
};
String where = ContactsContract.CommonDataKinds.Event.TYPE + "=" +
ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY +
" and " + ContactsContract.CommonDataKinds.Event.MIMETYPE +
" = '" + ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE +
"' and " + ContactsContract.Data.CONTACT_ID + " = " + id;
String sortOrder = ContactsContract.CommonDataKinds.Event.START_DATE + " ASC";
Cursor birthdayCur = cr.query(ContactsContract.Data.CONTENT_URI, columns, where,
null, sortOrder);
if (birthdayCur.getCount() > 0) {
while (birthdayCur.moveToNext()) {
String birthday = birthdayCur.getString(birthdayCur.
getColumnIndex(ContactsContract.CommonDataKinds.Event.START_DATE));
builder.append("Contact: ").append(name).append(" ").append(birthday).append("\n\n");
}
}
birthdayCur.close();
}
}
cursor.close();
return builder.toString();
}
然后在"onCreate"函数
上分配联系人 if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED)
{
ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.READ_CONTACTS }, 1);
} else {
listContacts.setText(loadContacts());
}
这行代码:
String sortOrder = ContactsContract.CommonDataKinds.Event.START_DATE + " ASC";
Cursor birthdayCur = cr.query(ContactsContract.Data.CONTENT_URI, columns, where,
null, sortOrder);
无论我在那里订购什么(名称、_ID 等)似乎都不起作用。
我正在尝试按生日排序,但即使我尝试按姓名排序也不起作用。为什么?
我是不是使用了错误类型的视图 (TextView),还是我使用 StringBuilder 设置文本的方式或其他完全不同的方式?
我的 minSdkVersion 是 19,targetSdkVersion 是 26。我正在我的 Nexus5(api 23 android 6.01)调试模式下测试这个应用程序。
感谢任何建议。
好吧,这就是我匆忙时发生的事情。其实很简单。 我只需要将所有需要的列放在第一个 Cursor 中,第二个更重要的是使用 "ContactsContract.Data.CONTENT_URI" 而不是 "ContactsContract.Contacts.CONTENT_URI" 因为 "DATA.CONTENT_URI" 实际上有我需要的所有列而 "Contacts.CONTENT_URI" 没有。
就这么简单。
private String loadContacts()
{
StringBuilder builder = new StringBuilder();
ContentResolver cr = getContentResolver();
String columns[] = {
ContactsContract.CommonDataKinds.Event.START_DATE,
ContactsContract.Contacts.DISPLAY_NAME
};
String where = ContactsContract.CommonDataKinds.Event.TYPE + "=" +
ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY +
" and " + ContactsContract.CommonDataKinds.Event.MIMETYPE +
" = '" + ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE + "'";
String sortOrder = ContactsContract.CommonDataKinds.Event.START_DATE + " ASC";
Cursor cursor = cr.query(ContactsContract.Data.CONTENT_URI,
columns, where,
null, sortOrder);
if (cursor.getCount() > 0){
while (cursor.moveToNext()){
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
String birthday = cursor.getString(cursor.
getColumnIndex(ContactsContract.CommonDataKinds.Event.START_DATE));
builder.append("Contact: ").append(name).append(birthday).append(" ").append("\n\n");
}
}
cursor.close();
return builder.toString();
}