Databases
StackOverflow2013
Postsdbo
POhow to redirect the from one activity to next activity with parameter
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POhow to redirect the from one activity to next activity with parameter
    primarykey
    data
    text
    <p>I want that when a date is clicked, it will go to next activity. I included intent but it is not working. A null pointer error is thrown. I put this intent on different position in onclick function but it is not working and throws exception. Please help me how to get and go to next activity from this activity with date as parameter</p> <pre><code>package com.examples; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.HashMap; import java.util.List; import java.util.Locale; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.graphics.Color; import android.os.Bundle; import android.text.format.DateFormat; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.GridView; import android.widget.ImageView; import android.widget.TextView; public class SimpleCalendarViewActivity extends Activity implements OnClickListener { private static final String tag = "SimpleCalendarViewActivity"; private ImageView calendarToJournalButton; private Button selectedDayMonthYearButton; private Button currentMonth; private ImageView prevMonth; private ImageView nextMonth; private GridView calendarView; private GridCellAdapter adapter; private Calendar _calendar; private int month, year; private final DateFormat dateFormatter = new DateFormat(); private static final String dateTemplate = "MMMM yyyy"; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.simple_calendar_view); _calendar = Calendar.getInstance(Locale.getDefault()); month = _calendar.get(Calendar.MONTH) + 1; year = _calendar.get(Calendar.YEAR); Log.d(tag, "Calendar Instance:= " + "Month: " + month + " " + "Year: " + year); selectedDayMonthYearButton = (Button) this.findViewById(R.id.selectedDayMonthYear); selectedDayMonthYearButton.setText("Selected: "); prevMonth = (ImageView) this.findViewById(R.id.prevMonth); prevMonth.setOnClickListener(this); currentMonth = (Button) this.findViewById(R.id.currentMonth); currentMonth.setText(dateFormatter.format(dateTemplate, _calendar.getTime())); nextMonth = (ImageView) this.findViewById(R.id.nextMonth); nextMonth.setOnClickListener(this); calendarView = (GridView) this.findViewById(R.id.calendar); // Initialised adapter = new GridCellAdapter(getApplicationContext(), R.id.calendar_day_gridcell, month, year); adapter.notifyDataSetChanged(); calendarView.setAdapter(adapter); } /** * * @param month * @param year */ private void setGridCellAdapterToDate(int month, int year) { adapter = new GridCellAdapter(getApplicationContext(), R.id.calendar_day_gridcell, month, year); _calendar.set(year, month - 1, _calendar.get(Calendar.DAY_OF_MONTH)); currentMonth.setText(dateFormatter.format(dateTemplate, _calendar.getTime())); adapter.notifyDataSetChanged(); calendarView.setAdapter(adapter); } @Override public void onClick(View v) { if (v == prevMonth) { if (month &lt;= 1) { month = 12; year--; } else { month--; } Log.d(tag, "Setting Prev Month in GridCellAdapter: " + "Month: " + month + " Year: " + year); setGridCellAdapterToDate(month, year); } if (v == nextMonth) { if (month &gt; 11) { month = 1; year++; } else { month++; } Log.d(tag, "Setting Next Month in GridCellAdapter: " + "Month: " + month + " Year: " + year); setGridCellAdapterToDate(month, year); } } @Override public void onDestroy() { Log.d(tag, "Destroying View ..."); super.onDestroy(); } // /////////////////////////////////////////////////////////////////////////////////////// // Inner Class public class GridCellAdapter extends BaseAdapter implements OnClickListener { private static final String tag = "GridCellAdapter"; private final Context _context; private final List&lt;String&gt; list; private static final int DAY_OFFSET = 1; private final String[] weekdays = new String[]{"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}; private final String[] months = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"}; private final int[] daysOfMonth = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; private final int month, year; private int daysInMonth, prevMonthDays; private int currentDayOfMonth; private int currentWeekDay; private Button gridcell; private TextView num_events_per_day; private final HashMap eventsPerMonthMap; private final SimpleDateFormat dateFormatter = new SimpleDateFormat("dd-MMM-yyyy"); // Days in Current Month public GridCellAdapter(Context context, int textViewResourceId, int month, int year) { super(); this._context = context; this.list = new ArrayList&lt;String&gt;(); this.month = month; this.year = year; Log.d(tag, "==&gt; Passed in Date FOR Month: " + month + " " + "Year: " + year); Calendar calendar = Calendar.getInstance(); setCurrentDayOfMonth(calendar.get(Calendar.DAY_OF_MONTH)); setCurrentWeekDay(calendar.get(Calendar.DAY_OF_WEEK)); Log.d(tag, "New Calendar:= " + calendar.getTime().toString()); Log.d(tag, "CurrentDayOfWeek :" + getCurrentWeekDay()); Log.d(tag, "CurrentDayOfMonth :" + getCurrentDayOfMonth()); // Print Month printMonth(month, year); // Find Number of Events eventsPerMonthMap = findNumberOfEventsPerMonth(year, month); } private String getMonthAsString(int i) { return months[i]; } private String getWeekDayAsString(int i) { return weekdays[i]; } private int getNumberOfDaysOfMonth(int i) { return daysOfMonth[i]; } public String getItem(int position) { return list.get(position); } @Override public int getCount() { return list.size(); } /** * Prints Month * * @param mm * @param yy */ private void printMonth(int mm, int yy) { Log.d(tag, "==&gt; printMonth: mm: " + mm + " " + "yy: " + yy); // The number of days to leave blank at // the start of this month. int trailingSpaces = 0; int leadSpaces = 0; int daysInPrevMonth = 0; int prevMonth = 0; int prevYear = 0; int nextMonth = 0; int nextYear = 0; int currentMonth = mm - 1; String currentMonthName = getMonthAsString(currentMonth); daysInMonth = getNumberOfDaysOfMonth(currentMonth); Log.d(tag, "Current Month: " + " " + currentMonthName + " having " + daysInMonth + " days."); // Gregorian Calendar : MINUS 1, set to FIRST OF MONTH GregorianCalendar cal = new GregorianCalendar(yy, currentMonth, 1); Log.d(tag, "Gregorian Calendar:= " + cal.getTime().toString()); if (currentMonth == 11) { prevMonth = currentMonth - 1; daysInPrevMonth = getNumberOfDaysOfMonth(prevMonth); nextMonth = 0; prevYear = yy; nextYear = yy + 1; Log.d(tag, "*-&gt;PrevYear: " + prevYear + " PrevMonth:" + prevMonth + " NextMonth: " + nextMonth + " NextYear: " + nextYear); } else if (currentMonth == 0) { prevMonth = 11; prevYear = yy - 1; nextYear = yy; daysInPrevMonth = getNumberOfDaysOfMonth(prevMonth); nextMonth = 1; Log.d(tag, "**--&gt; PrevYear: " + prevYear + " PrevMonth:" + prevMonth + " NextMonth: " + nextMonth + " NextYear: " + nextYear); } else { prevMonth = currentMonth - 1; nextMonth = currentMonth + 1; nextYear = yy; prevYear = yy; daysInPrevMonth = getNumberOfDaysOfMonth(prevMonth); Log.d(tag, "***---&gt; PrevYear: " + prevYear + " PrevMonth:" + prevMonth + " NextMonth: " + nextMonth + " NextYear: " + nextYear); } // Compute how much to leave before before the first day of the // month. // getDay() returns 0 for Sunday. int currentWeekDay = cal.get(Calendar.DAY_OF_WEEK) - 1; trailingSpaces = currentWeekDay; Log.d(tag, "Week Day:" + currentWeekDay + " is " + getWeekDayAsString(currentWeekDay)); Log.d(tag, "No. Trailing space to Add: " + trailingSpaces); Log.d(tag, "No. of Days in Previous Month: " + daysInPrevMonth); if (cal.isLeapYear(cal.get(Calendar.YEAR)) &amp;&amp; mm == 1) { ++daysInMonth; } // Trailing Month days for (int i = 0; i &lt; trailingSpaces; i++) { Log.d(tag, "PREV MONTH:= " + prevMonth + " =&gt; " + getMonthAsString(prevMonth) + " " + String.valueOf((daysInPrevMonth - trailingSpaces + DAY_OFFSET) + i)); list.add(String.valueOf((daysInPrevMonth - trailingSpaces + DAY_OFFSET) + i) + "-GREY" + "-" + getMonthAsString(prevMonth) + "-" + prevYear); } // Current Month Days for (int i = 1; i &lt;= daysInMonth; i++) { Log.d(currentMonthName, String.valueOf(i) + " " + getMonthAsString(currentMonth) + " " + yy); if (i == getCurrentDayOfMonth()) { list.add(String.valueOf(i) + "-BLUE" + "-" + getMonthAsString(currentMonth) + "-" + yy); } else { list.add(String.valueOf(i) + "-WHITE" + "-" + getMonthAsString(currentMonth) + "-" + yy); } } // Leading Month days for (int i = 0; i &lt; list.size() % 7; i++) { Log.d(tag, "NEXT MONTH:= " + getMonthAsString(nextMonth)); list.add(String.valueOf(i + 1) + "-GREY" + "-" + getMonthAsString(nextMonth) + "-" + nextYear); } } /** * NOTE: YOU NEED TO IMPLEMENT THIS PART Given the YEAR, MONTH, retrieve * ALL entries from a SQLite database for that month. Iterate over the * List of All entries, and get the dateCreated, which is converted into * day. * * @param year * @param month * @return */ private HashMap findNumberOfEventsPerMonth(int year, int month) { HashMap map = new HashMap&lt;String, Integer&gt;(); // DateFormat dateFormatter2 = new DateFormat(); // // String day = dateFormatter2.format("dd", dateCreated).toString(); // // if (map.containsKey(day)) // { // Integer val = (Integer) map.get(day) + 1; // map.put(day, val); // } // else // { // map.put(day, 1); // } return map; } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { View row = convertView; if (row == null) { LayoutInflater inflater = (LayoutInflater) _context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); row = inflater.inflate(R.layout.calendar_day_gridcell, parent, false); } // Get a reference to the Day gridcell gridcell = (Button) row.findViewById(R.id.calendar_day_gridcell); gridcell.setOnClickListener(this); // ACCOUNT FOR SPACING Log.d(tag, "Current Day: " + getCurrentDayOfMonth()); String[] day_color = list.get(position).split("-"); String theday = day_color[0]; String themonth = day_color[2]; String theyear = day_color[3]; if ((!eventsPerMonthMap.isEmpty()) &amp;&amp; (eventsPerMonthMap != null)) { if (eventsPerMonthMap.containsKey(theday)) { num_events_per_day = (TextView) row.findViewById(R.id.num_events_per_day); Integer numEvents = (Integer) eventsPerMonthMap.get(theday); num_events_per_day.setText(numEvents.toString()); } } // Set the Day GridCell gridcell.setText(theday); gridcell.setTag(theday + "-" + themonth + "-" + theyear); Log.d(tag, "Setting GridCell " + theday + "-" + themonth + "-" + theyear); if (day_color[1].equals("GREY")) { gridcell.setTextColor(Color.LTGRAY); } if (day_color[1].equals("WHITE")) { gridcell.setTextColor(Color.WHITE); } if (day_color[1].equals("BLUE")) { gridcell.setTextColor(getResources().getColor(R.color.static_text_color)); } return row; } @Override public void onClick(View view) { String date_month_year = (String) view.getTag(); selectedDayMonthYearButton.setText("Selected: " + date_month_year); try { Date parsedDate = dateFormatter.parse(date_month_year); Log.d(tag, "Parsed Date: " + parsedDate.toString()); Intent intent = new Intent(SimpleCalendarViewActivity.this,ViewReport.class); intent.putExtra("date",parsedDate); startActivity(intent); } catch (ParseException e) { e.printStackTrace(); } } public int getCurrentDayOfMonth() { return currentDayOfMonth; } private void setCurrentDayOfMonth(int currentDayOfMonth) { this.currentDayOfMonth = currentDayOfMonth; } public void setCurrentWeekDay(int currentWeekDay) { this.currentWeekDay = currentWeekDay; } public int getCurrentWeekDay() { return currentWeekDay; } } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USK.C.
    1. USuser2858425
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POhow to redirect the from one activity to next activity with parameter
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COPlease, add logcat ouput
      singulars
      1. POhow to redirect the from one activity to next activity with parameter
      1. USjosuadas
    2. COPost you logcat error
      singulars
      1. POhow to redirect the from one activity to next activity with parameter
      1. USHarish Godara
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload