Develop Reference

Get events from public google calendar Android

I would like to have a calendar view that would present all of the events of a public google calendar.
I have an OAuth 2.0 client ID for my user and my calendar is set to PUBLIC.
Then I went trough the Calendar Provider tutorial (https://developer.android.com/guide/topics/providers/calendar-provider.html) and use this code:
public class MainActivity extends Activity {
// Projection array. Creating indices for this array instead of doing
// dynamic lookups improves performance.
public static final String[] EVENT_PROJECTION = new String[]{
CalendarContract.Calendars._ID, // 0
CalendarContract.Calendars.ACCOUNT_NAME, // 1
CalendarContract.Calendars.CALENDAR_DISPLAY_NAME, // 2
CalendarContract.Calendars.OWNER_ACCOUNT // 3
};
// The indices for the projection array above.
private static final int PROJECTION_ID_INDEX = 0;
private static final int PROJECTION_ACCOUNT_NAME_INDEX = 1;
private static final int PROJECTION_DISPLAY_NAME_INDEX = 2;
private static final int PROJECTION_OWNER_ACCOUNT_INDEX = 3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Run query
Cursor cur = null;
ContentResolver cr = getContentResolver();
Uri uri = CalendarContract.Calendars.CONTENT_URI;
String selection = "((" + CalendarContract.Calendars.ACCOUNT_NAME + " = ?) AND ("
+ CalendarContract.Calendars.ACCOUNT_TYPE + " = ?) AND ("
+ CalendarContract.Calendars.OWNER_ACCOUNT + " = ?))";
String[] selectionArgs = new String[]{"****#gmail.com", "google.com",
"****#gmail.com"};
// Submit the query and get a Cursor object back.
cur = cr.query(uri, EVENT_PROJECTION, selection, selectionArgs, null);
// Use the cursor to step through the returned records
while (cur.moveToNext()) {
long calID = 0;
String displayName = null;
String accountName = null;
String ownerName = null;
// Get the field values
calID = cur.getLong(PROJECTION_ID_INDEX);
displayName = cur.getString(PROJECTION_DISPLAY_NAME_INDEX);
accountName = cur.getString(PROJECTION_ACCOUNT_NAME_INDEX);
ownerName = cur.getString(PROJECTION_OWNER_ACCOUNT_INDEX);
}
}
}
Unfortunately, the Cursor stayed empty. I was also trying to define the ACCOUNT_TYPE to "LOCAL", but it didn't work.
Target SDK set to 21, and i have all the necessary permissions.
How can I retrieve the events of my calendar? Please help /:

Android: loading contacts with CursorLoader, not all being loaded

My android app is supposed to load all contacts recorded in the device and display them in a list. I haven't been able to figure out why, but not all contacts are being loaded.
Here is the code I'm using to start the query with a CursorLoader:
public android.support.v4.content.Loader<Cursor> onCreateLoader(int id, Bundle args) {
if (id == ContactsQuery.QUERY_ID) {
Uri contentUri;
if (mSearchTerm == null) {
contentUri = ContactsQuery.CONTENT_URI;
} else {
contentUri =
Uri.withAppendedPath(ContactsQuery.FILTER_URI, Uri.encode(mSearchTerm));
}
return new CursorLoader(getActivity(),
contentUri,
ContactsQuery.PROJECTION,
ContactsQuery.SELECTION,
null,
ContactsQuery.SORT_ORDER);
ContactsQuery is defined as follows:
public interface ContactsQuery {
final static int QUERY_ID = 1;
final static Uri CONTENT_URI = Contacts.CONTENT_URI;
final static Uri FILTER_URI = Contacts.CONTENT_FILTER_URI;
#SuppressLint("InlinedApi")
final static String SELECTION =
(Utils.hasHoneycomb() ? Contacts.DISPLAY_NAME_PRIMARY : Contacts.DISPLAY_NAME) +
"<>''" + " AND " + Contacts.IN_VISIBLE_GROUP + "=1";
#SuppressLint("InlinedApi")
final static String SORT_ORDER =
Utils.hasHoneycomb() ? Contacts.SORT_KEY_PRIMARY : Contacts.DISPLAY_NAME;
#SuppressLint("InlinedApi")
final static String[] PROJECTION = {
// The contact's row id
Contacts._ID,
Contacts.LOOKUP_KEY,
Utils.hasHoneycomb() ? Contacts.DISPLAY_NAME_PRIMARY : Contacts.DISPLAY_NAME,
Utils.hasHoneycomb() ? Contacts.PHOTO_THUMBNAIL_URI : Contacts._ID,
SORT_ORDER,
};
final static int ID = 0;
final static int LOOKUP_KEY = 1;
final static int DISPLAY_NAME = 2;
final static int PHOTO_THUMBNAIL_DATA = 3;
final static int SORT_KEY = 4;
}
Why aren't all contacts being loaded when mSearchTerm is null?

You are only pulling down contents of the phone's contacts - the contacts that are stored on the SIM may or may not be accessible due to the phone's settings (for example if the phone has disabled access to SIM contacts).
Here is a post that will show you how to read them separately.
You can potentially discern between the two using the following:
//for SIM Card
ContentValues values = new ContentValues();
values.put(RawContacts.ACCOUNT_TYPE, "com.android.contacts.sim");
values.put(RawContacts.ACCOUNT_NAME, "SIM");
Uri rawContactUri = getContentResolver().insert(RawContacts.CONTENT_URI, values);
//for everyone else
values.clear();
values.put(Data.RAW_CONTACT_ID, rawContactId);
values.put(Data.MIMETYPE, StructuredName.CONTENT_ITEM_TYPE);
values.put(StructuredName.DISPLAY_NAME, "Name");

The problem was in the selection. The offending line is
final static String SELECTION =
(Utils.hasHoneycomb() ? Contacts.DISPLAY_NAME_PRIMARY : Contacts.DISPLAY_NAME) +
"<>''" + " AND " + Contacts.IN_VISIBLE_GROUP + "=1";
The missing contacts had Contacts.IN_VISIBLE_GROUP <> 1. This behavior seems a bit pathological because it seems that perfectly valid contacts that are displayed in the contact list for the built in apps, such as my mother, are not in the visible group. I implemented a kludge:
final static String SELECTION =
(Utils.hasHoneycomb() ? Contacts.DISPLAY_NAME_PRIMARY : Contacts.DISPLAY_NAME) +
"<>'' AND ("+Contacts.HAS_PHONE_NUMBER+"=1 OR "+Contacts.IN_VISIBLE_GROUP+" = 1)";
This is sufficient for my app.

sqlite how to pass in 2 arguments to a query

I have the following query that returns a Cursor based on how many records have an awayreasontypeid of '2'. It works fine.
How can i run the same query but return a Cursor of all the records that have an awayreasontypeid of either '2' or '0'?
// table AwayReason column names
public static final String C_AWAYREASON_ID_INDEX = BaseColumns._ID;
public static final String C_AWAYREASON_ID = "awayreasonid";
public static final String C_AWAYREASON_NAME = "awayreasonname";
public static final String C_AWAYREASON_TYPE_ID = "awayreasontypeid";
public Cursor queryCarerAwayReasons(){
SQLiteDatabase db = dbhelper.getReadableDatabase();
String[] carer = { "2" };
Cursor c = db.rawQuery("SELECT * FROM " + DBHelper.TABLEAWAYREASON + " WHERE awayreasontypeid = ?", carer);
return c;
}
Thanks in advance
Matt

You can use IN:
String[] carer = { "2", "0" };
Cursor c = db.rawQuery("SELECT * FROM " + DBHelper.TABLEAWAYREASON + " WHERE awayreasontypeid IN (?,?)", carer);

Failing to query the max number in database

I am trying to find the max number in a column of one of the tables in my database.
I thought I had this one sorted (I posted similar question previously), however after some testing I have realised my code isn't working as I thought.
The database consists of a table with the following columns:
_id, inspection_link, area_number, area_reference
I have created the following code in my database helper class:
public static final String AREAS_TABLE = "areas";
public static final String AREA_ID = "_id";
public static final String AREA_NUMBER = "area_number";
public static final String AREA_REF = "area_reference";
public static final String AREA_LINK = "area_link";
public static final String INSPECTION_LINK = "inspection_link";
public Cursor selectMaxAreaNumber (long inspectionId) {
String inspectionIdString = String.valueOf(inspectionId);
String[] tableColumns = new String[] {
AREA_NUMBER,
"(SELECT max(" + AREA_NUMBER + ") FROM " + AREAS_TABLE + ") AS max"
};
String whereClause = INSPECTION_LINK + " = ?";
String[] whereArgs = new String[] {
inspectionIdString
};
Cursor c = rmDb.query(AREAS_TABLE, tableColumns, whereClause, whereArgs,
null, null, null);
if (c != null) {
c.moveToFirst();
}
c.close();
return c;
}
Then in the activity where I want to query the database I have written the following:
public class AreaEdit extends Activity {
private EditText AreaNumber;
private EditText AreaReference;
private Button saveButton;
private Button cancelButton;
protected boolean changesMade;
private AlertDialog unsavedChangesDialog;
private RMDbAdapter rmDbHelper;
private long inspectionId;
private long areaId;
private int nextAreaNumber = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
rmDbHelper = new RMDbAdapter(this);
rmDbHelper.open();
Intent i = getIntent();
inspectionId = i.getLongExtra("Intent_InspectionID", -1);
areaId = i.getLongExtra("Intent_AreaID", -1);
if (areaId == -1) {
Cursor c = rmDbHelper.selectMaxAreaNumber(inspectionId);
startManagingCursor(c);
c.moveToFirst();
nextAreaNumber = c.getInt(c.getColumnIndex("max")) + 1;
}
setContentView(R.layout.edit_area);
setUpViews();
populateFields();
setTextChangedListeners();
}
private void setUpViews() {
AreaNumber =(EditText)findViewById(R.id.area_number);
AreaReference =(EditText)findViewById(R.id.area_reference);
saveButton = (Button)findViewById(R.id.area_save_button);
cancelButton = (Button)findViewById(R.id.area_cancel_button);
}
private void populateFields() {
if (areaId > 0) {
Cursor c = rmDbHelper.fetchArea(areaId);
startManagingCursor(c);
c.moveToFirst();
AreaNumber.setText(c.getString(
c.getColumnIndexOrThrow(RMDbAdapter.AREA_NUMBER)));
AreaReference.setText(c.getString(
c.getColumnIndexOrThrow(RMDbAdapter.AREA_REF)));
c.close();
}
else {
AreaNumber.setText(String.valueOf(nextAreaNumber));
}
}
However, when it returns the wrong number - it seems to pick up the maximum number from the whole table which includes data from other inspections.
I guess this may be down to the conversion between Strings and Longs etc maybe, but I have a brickwall with this?
Any help much appreciated.

You can simply try below:
String sql = "SELECT MAX(ColumnNameHere) AS MaxValue FROM myTable WHERE AnotherColumn = 'SomValue'";
Cursor c = db.rawQuery(sql, null);
c.moveToFirst();
c.getInt(c.getColumnIndex("MaxValue"));

Detailed solution to this question found here:
Solution to this detailed in the following post: SELECT statement not returning MAX number
Basically, it was an issue with the query as thought and how I used the cursor.

How can I read the favorites contacts inside service?

I am looking for a way to get the contacts in the favorites list inside service from phone number or from name it dose not matter. Can any one help me with this?
It's not important to use any code related to this code
I found in the developer.android.com something like this (IN_VISIBLE_GROUP).
How to use this variable in my case?
case (PICK_CONTACT):
if (resultCode == Activity.RESULT_OK) {
Uri contactData = data.getData();
Cursor c = managedQuery(contactData, null, null, null, null);
ContentResolver cr = getContentResolver();
if (c.moveToFirst()) {
String name = c.getString(c.getColumnIndexOrThrow(People.NAME));
String id =c.getString(c.getColumnIndexOrThrow(People._ID));
Cursor phones = cr.query(Phone.CONTENT_URI, null,
Phone.CONTACT_ID + " = " + id, null, null);
}

Lets assume that you are searching a contact by name..
If you want to get Favourite value of all the possible contacts , drop the selection parameter in the given code.
//First get the contact ID from a display name as:-
String displayName = "Albert Einstein";
Uri contacts = ContactsContract.Contacts.CONTENT_URI;
cur = cr.query(contacts, null, ContactsContract.Contacts.DISPLAY_NAME +"="+displayName,null, null);
int contactIdIndex = cur.getColumnIndex(ContactsContract.PhoneLookup._ID);
int contactId = cur.getInt(contactIdIndex);
//Make a query to get the Starred value:-
Cursor starred = cr.query(ContactsContract.Contacts.CONTENT_URI,
new String[] { ContactsContract.Contacts.STARRED },
ContactsContract.Contacts._ID + " = " + contactId,
null, null);
if (starred != null && starred.moveToFirst())
{
int fav = starred.getInt(0);
}
if (starred != null)
starred.close();
}
You can drop the step of getting Contact ID and then querying for Starred value and directly query based on Display name

Something like this?
final private static class DataQuery {
public static final int COLUMN_MIMETYPE = 1;
public static final int COLUMN_PHONE = 2;
public static final int COLUMN_RAWCONTACT_ID = 3;
public static final int COLUMN_PHONE_NUMBER = COLUMN_DATA1;
public static final String[] PROJECTION = new String[] { Data._ID, Data.MIMETYPE, Data.DATA1, Data.RAW_CONTACT_ID };
public static final String SELECTION_PHONE = Data.DATA1 + "=?";
}
long findContact(Context context, String number) {
long rawContactId = -1;
final Cursor cursor = context.getContentResolver().query(Data.CONTENT_URI, DataQuery.PROJECTION, DataQuery.SELECTION_PHONE, new String[] { number }, null);
try {
if (cursor.moveToFirst()) {
rawContactId = cursor.getLong(DataQuery.COLUMN_RAWCONTACT_ID);
}
} finally {
if (cursor != null)
cursor.close();
}
return rawContactId;
}

Ok let's try with this...
private static final Uri DATAGROUP_CONTENT_URI = ContactsContract.Data.CONTENT_URI.buildUpon().appendQueryParameter(Data.MIMETYPE, GroupMembership.CONTENT_ITEM_TYPE).build();
public static void querytGroups(Context context) {
final ContentResolver resolver = context.getContentResolver();
long groupid=getGroupId(resolver, "Family");
final Cursor c = resolver.query(DATAGROUP_CONTENT_URI, DataQueryForContactsInGroup.PROJECTION, DataQueryForContactsInGroup.SELECTION, new String[] {ContactsContract.CommonDataKinds.GroupMembership.CONTENT_ITEM_TYPE, String.valueOf(groupid)}, null);
try {
while (c.moveToNext()) {
final long rawContactId = c.getLong(DataQueryForContactsInGroup.RAW_CONTACT_ID);
//do something
}
}finally {
c.close();
}
}
private static long getGroupId(final ContentResolver resolver, String groupName) {
long groupid = -1;
Cursor cur = null;
try {
cur = resolver.query(Groups.CONTENT_URI, DataQueryForGroup.PROJECTION, DataQueryForGroup.SELECTION, new String[]{"%"+groupName+"%"}, null);
while (cur.moveToNext()) {
return groupid= cur.getLong(DataQueryForGroup.GROUP_ID);
}
}finally {
if (cur!=null) cur.close();
}
return groupid;
}
private interface DataQueryForGroup {
public final static String[] PROJECTION = new String[] {Groups._ID};
public static final String SELECTION = Groups.TITLE+" LIKE ?";
public final static int GROUP_ID = 0;
}
private interface DataQueryForContactsInGroup {
public final static String[] PROJECTION = new String[] { Data.RAW_CONTACT_ID };
public static final String SELECTION = "("+Data.MIMETYPE + "=?) and ("+ ContactsContract.CommonDataKinds.GroupMembership.GROUP_ROW_ID+ "=?)";
public final static int RAW_CONTACT_ID = 0;
}
Please consider that if your google account is not English you need to look for the proper group's name