查询日历ICS

Question

I try to read out all existing calendars. I tried the example from here:

http://developer.android.com/guide/topics/providers/calendar-provider.html

but I get following compile error: The method getContentResolver() is undefined for the type xxx Can somebody help me please?

public HashMap<String, String> readCalendar() {     
String[] EVENT_PROJECTION = new String[] {
        Calendars._ID,   
        Calendars.OWNER_ACCOUNT,                    
        Calendars.ACCOUNT_NAME,                  
        Calendars.CALENDAR_DISPLAY_NAME                                   
    };
    String selectionICS = "((" + Calendars.ACCOUNT_NAME + " = ?) AND (" 
            + Calendars.ACCOUNT_TYPE + " = ?) AND ("
            + Calendars.OWNER_ACCOUNT + " = ?))";
    String[] selectionArgs = new String[] {"VISIBLE=1"}; // or "selected=1" ??

    Cursor managedCursor = null;
        ContentResolver cr = getContentResolver();
        managedCursor = cr.query(calendarUri, EVENT_PROJECTION, selectionICS, selectionArgs, null);selectionICS, selectionArgs, null);


}

Answer 1

getContentResolver() is a method of Context , so my guess is that your class is not derived from Activity (which is derived from Context ).

You have to use a context variable if you want to call it outside of an activity class ( context.getContentResolver() ). If your class is a BroadcastReceiver then the context variable is given as an argument in onReceive() . If not, you have to send it to your method when you call it.