java - why isn't my program displaying february 2016 and following months correctly? -
i trying create simple calendar android. supposed show 1 month @ time , list associated events according selected day. stuck on implementation of calendar ui since doesn't list february 2016 , following months correctly.
instead of 29 days lists 28 , listing of february starts on sunday instead of monday. can please take @ program , me?
i suspect error in following lines:
// init temporary calendar monday, first day of displayed month calendar calx= getcalendar(year, month, 1); // week_of_year of first day of month int firstweek = calx.get(calendar.week_of_year); // set day_of_week monday cal.set(calendar.day_of_week, calendar.monday); // set week_of_year first week month part of cal.set(calendar.week_of_year, firstweek); i hope not offend posting complete program, unsure bug crawling........
drawable/circle_today.xml:
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <solid android:color="#ffff00" /> <corners android:topleftradius="30dp" android:toprightradius="30dp" android:bottomleftradius="30dp" android:bottomrightradius="30dp" /> </shape> drawable/circle_selected.xml:
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <solid android:color="#00ff00" /> <corners android:topleftradius="30dp" android:toprightradius="30dp" android:bottomleftradius="30dp" android:bottomrightradius="30dp" /> </shape> layout/activity_main.xml:
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" android:paddingbottom="@dimen/activity_vertical_margin" tools:context=".mainactivity"> <tablelayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignparenttop="true" android:layout_centerhorizontal="true" android:id="@+id/tablelayout"></tablelayout> <listview android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/listview" android:layout_below="@+id/tablelayout" android:layout_centerhorizontal="true" /> </relativelayout> mainactivity.java:
import android.content.intent; import android.graphics.color; import android.support.v4.app.dialogfragment; import android.support.v4.app.fragmentactivity; import android.os.bundle; import android.support.v7.app.actionbaractivity; import android.support.v7.app.appcompatactivity; import android.view.gravity; import android.view.menu; import android.view.menuitem; import android.view.view; import android.widget.arrayadapter; import android.widget.edittext; import android.widget.listview; import android.widget.tablelayout; import android.widget.tablerow; import android.widget.textview; import java.util.arraylist; import java.util.calendar; import java.util.gregoriancalendar; public class mainactivity extends appcompatactivity { // tablelayout holds calendar matrix private tablelayout calendartable; // list future use list of events of selected day private listview daylist; //list of array strings serve list items arraylist<string> listitems=new arraylist<string>(); //defining string adapter handle data of listview arrayadapter<string> adapter; // today stays today complete lifecycle of mainactivity private int today; // thismonth stays thismonth complete lifecycle of mainactivity private int thismonth; // selectedday changes onclick private int selectedday; // month changes onclick on day of other month private int month; // year changes when other month either january or december of different year private int year; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); // calendar whith parameters of calendar calendar = getcalendar(); // initiate global variables selectedday = today = calendar.get(calendar.day_of_month); thismonth = month = calendar.get(calendar.month); year = calendar.get(calendar.year); // set tablelayout holds calendar matrix calendartable = (tablelayout) findviewbyid(r.id.tablelayout); // set list future use list of events of selected day daylist = (listview) findviewbyid(r.id.listview); adapter = new arrayadapter<string>(this, android.r.layout.simple_list_item_1, listitems); daylist.setadapter(adapter); // sanity test testcalendar(); // build calendar table updatecalendar(); } // function test calendar behaviour, expected output // week: 8 day: 27 month: 1 // week: 8 day: 28 month: 1 // week: 9 day: 29 month: 1 // week: 9 day: 1 month: 2 // contrary ui behaviour lists 2016-2-1 sunday , lists 28 days private final void testcalendar() { calendar c = getcalendar(2016, 1, 27); (int = 0; < 4; i++) { system.out.println("week: " +c.get(calendar.week_of_year) + " day: " + c.get(calendar.day_of_month) + " month: " + c.get(calendar.month)); c.add(calendar.day_of_month, 1); } } // function ensure correct configuration of calendar private final calendar getcalendar() { calendar gc = new gregoriancalendar(); gc.setfirstdayofweek(calendar.monday); gc.setminimaldaysinfirstweek(4); return gc; } // function ensure correct configuration of calendar private final calendar getcalendar(int year, int month, int day) { calendar gc = new gregoriancalendar(year, month, day); gc.setfirstdayofweek(calendar.monday); gc.setminimaldaysinfirstweek(4); return gc; } private void updatecalendar() { // reset table calendartable.removeallviews(); // init calendar used function calendar cal = getcalendar(); // init temporary calendar monday, first day of displayed month calendar calx= getcalendar(year, month, 1); // week_of_year of first day of month int firstweek = calx.get(calendar.week_of_year); // set day_of_week monday cal.set(calendar.day_of_week, calendar.monday); // set week_of_year first week month part of cal.set(calendar.week_of_year, firstweek); // init reusable vars tablerow row = null; textview tv = null; int paddingnormal = 35; //outer loop, rows (int = 0; < 7; i++) { // init row row = new tablerow(this); // stretch row // code stretch row width parent view, took no effect /*row.setlayoutparams(new tablerow.layoutparams(tablerow.layoutparams.match_parent, tablerow.layoutparams.wrap_content));*/ // inner loop, fields (int j = 0; j < 8; j++) { // init tv = new textview(this); // center day labels tv.setgravity(gravity.center_vertical | gravity.center_horizontal); // code stretch row width parent view, took no effect /*tv.setlayoutparams(new tablerow.layoutparams(tablerow.layoutparams.wrap_content, tablerow.layoutparams.wrap_content));*/ // first row, headers if (i == 0) { tv.setpadding(paddingnormal, paddingnormal, paddingnormal, paddingnormal); tv.setbackgroundcolor(color.rgb(213, 213, 213)); switch (j) { case 0: break; case 1: tv.settext("mo"); break; case 2: tv.settext("di"); break; case 3: tv.settext("mi"); break; case 4: tv.settext("do"); break; case 5: tv.settext("fr"); break; case 6: tv.settext("sa"); break; case 7: tv.settext("so"); break; } } else if (j == 0) { // week no tv.setpadding(paddingnormal, paddingnormal, paddingnormal, paddingnormal); tv.setbackgroundcolor(color.rgb(213, 213, 213)); tv.settext(""+cal.get(calendar.week_of_year)); } else { // days tv.setpadding(paddingnormal, paddingnormal, paddingnormal, paddingnormal); tv.settext("" + cal.get(calendar.day_of_month)); // mark days of different month if ((cal.get(calendar.month) != month)) { tv.settextcolor(color.rgb(213, 213, 213)); // switch previous or next month tv.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { // set selectedday of different month selectedday = integer.parseint(((textview) v).gettext() + ""); // if selectedday bigger 15 part of previous month if (selectedday > 15) { // if month january if (month == calendar.january) { // month reset december month = calendar.december; // , year decremented previous year year = year - 1; } else { // else month decremented month = month - 1; } // else selectedday part of next month } else { // if month december if (month == calendar.december) { // month reset january month = calendar.january; // , year incremented year = year + 1; } else { // else month incremented month = month + 1; } } // updatecalendar display different month updatecalendar(); } }); } else { // mark today yellow circle if ((cal.get(calendar.day_of_month) == today) && month == thismonth) { tv.setbackgroundresource(r.drawable.circle_today); } // mark selected day green circle if ((cal.get(calendar.day_of_month) == selectedday)) { tv.setbackgroundresource(r.drawable.circle_selected); } // setonclicklistener updatecalendar , display new selection , daylist tv.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { // set selectedday before rebuilding table selectedday = integer.parseint(((textview) v).gettext() + ""); // rebuild table updatecalendar(); } }); } // increment calendar day_of_month field 1 cal.add(calendar.day_of_month, 1); } // add textview row row.addview(tv); } // add row tablelayout calendartable.addview(row); } // set actionbar title "*month* *year*" string title =""; switch(month) { case calendar.january: title = "jänner " + year; break; case calendar.february: title = "februar " + year; break; case calendar.march: title = "märz " + year; break; case calendar.april: title = "april " + year; break; case calendar.may: title = "mai " + year; break; case calendar.june: title = "juni " + year; break; case calendar.july: title = "juli " + year; break; case calendar.august: title = "august " + year; break; case calendar.september: title = "september " + year; break; case calendar.october: title = "oktober " + year; break; case calendar.november: title = "november " + year; break; case calendar.december: title = "dezember " + year; break; } settitle(title); // list events of selected day updatedaylist(); } private void updatedaylist() { // todo implement... adapter.clear(); adapter.add(selectedday + "/" + month + "/" + year); } @override public boolean oncreateoptionsmenu(menu menu) { // inflate menu; adds items action bar if present. getmenuinflater().inflate(r.menu.menu_main, menu); return true; } @override public boolean onoptionsitemselected(menuitem item) { // handle action bar item clicks here. action bar // automatically handle clicks on home/up button, long // specify parent activity in androidmanifest.xml. int id = item.getitemid(); //noinspection simplifiableifstatement if (id == r.id.action_settings) { return true; } return super.onoptionsitemselected(item); }
remember day_of_week uses 0=sunday, 1=monday, ... , on. don't know if locale makes difference, in us week starts on sunday.
feb 1, 2015 sunday. week_of_year 6.
setting day_of_week 1=monday monday, feb 2, 2015.
don't think after.
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