Develop Reference

Error coverting Integer variables to Date Object and value returned is always 31-DEC - 1?

I have written this line of code of code:
dateSelected = new GregorianCalendar(tempYear, tempMonth, tempDate,tempHour,tempMinute).getTime();
I got these value from datepicker and timepicker dialogs in android. I am able to get correct values in these integer variables but when I convert them to Date object it will always be 31 dec. I am not able to fix the problem.
I have also tried this approach as well:
Calendar calendar = Calendar.getInstance();
calendar.set(tempYear, tempMonth, tempDate, tempHour, tempMinute);
dateSelected = calendar.getTime();
Whenever Second line is commented out it is working fine. I am perfectly getting current date and time. But when it is uncommented the problem returns.
In case anyone needs my full code:
package com.bignerdranch.android.todolistwithdate;
/**********************************************
* This activity will open new dialog box that will add new
* ToDo list item to the list.
*/
import android.app.Activity;
import android.content.Intent;
import android.support.v4.app.DialogFragment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TimePicker;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
public class AddToDoActivity extends AppCompatActivity {
EditText entryName;
Button dateSelectionButton;
Button addEntry;
Date dateSelected;
Button timeSelectionButton;
private int tempDate, tempMonth, tempYear, tempHour, tempMinute;
String nameToDoItem;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_to_do);
entryName = (EditText)findViewById(R.id.new_todo_edittext);
dateSelectionButton = (Button)findViewById(R.id.date_selection_button);
addEntry = (Button)findViewById(R.id.entry_add_button);
timeSelectionButton = (Button)findViewById(R.id.time_selection_button);
//Create date selection Dialog here
//Also add code for modifying dateSelected Variable
dateSelectionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DialogFragment datePickerDialog = new DatePickerFragment() {
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
super.onDateSet(view, year, monthOfYear, dayOfMonth);
dateSelectionButton.setText(Integer.toString(dayOfMonth) + "/" + Integer.toString(monthOfYear + 1) + "/" + Integer.toString(year));
tempDate = dayOfMonth;
tempMonth = monthOfYear;
tempYear = year;
}
};
datePickerDialog.show(getSupportFragmentManager(), "datePicker");
}
});
timeSelectionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DialogFragment timePickerDialog = new TimePickerFragment() {
#Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
super.onTimeSet(view, hourOfDay, minute);
timeSelectionButton.setText(Integer.toString(hourOfDay) + ":" + Integer.toString(minute));
tempHour = hourOfDay;
tempMinute = minute;
}
};
timePickerDialog.show(getSupportFragmentManager(), "timePicker");
}
});
//Work here to get calendar working properly
Calendar calendar = Calendar.getInstance();
calendar.set(tempYear, tempMonth, tempDate, tempHour, tempMinute);
dateSelected = calendar.getTime();
entryName = (EditText)findViewById(R.id.new_todo_edittext);
addEntry = (Button)findViewById(R.id.entry_add_button);
addEntry.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
nameToDoItem = entryName.getText().toString();
Intent resultIntent = new Intent();
resultIntent.putExtra("NameOfItem", nameToDoItem);
resultIntent.putExtra("DateOfItem", dateSelected);
setResult(Activity.RESULT_OK, resultIntent);
Log.i("Date: ", dateSelected.toString() );
finish();
}
});
}
}

When the code works all variables equal to 0 because a user doesn't pick a date and a time at the moment.
Calendar calendar = Calendar.getInstance();
calendar.set(tempYear, tempMonth, tempDate, tempHour, tempMinute);
dateSelected = calendar.getTime();
Move the code in addEntry's onClickListener implementation and it will work 👍

Android: How to implement an ArrayList with holidays dates

I'm developing application that in one of its activity has the mechanism that calculates workdays between two dates:
package com.example.salary;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Toast;
public class CountingWorkDays extends Activity {
static Calendar start_calendar = Calendar.getInstance();
static Calendar end_calendar = Calendar.getInstance();
EditText et_start;
EditText et_end;
Button count;
Button save_days;
static int workDays = 0;
static int totalDays = 0;
int dni_robocze = 0;
Calendar start_calendar_save = Calendar.getInstance();
Calendar end_calendar_save = Calendar.getInstance();
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.przeliczanie_dni_roboczych);
gather_start_date();
gather_end_date();
after_clicking_count();
after_clicking_save();
}
private void update_et(EditText edittext, Calendar myCalendar) { //inserting to EditText object
String myFormat = "dd/MM/yy";
SimpleDateFormat date = new SimpleDateFormat(myFormat, Locale.UK);
edittext.setText(date.format(myCalendar.getTime()));
}
public void gather_start_date() { //getting start date
et_start = (EditText) findViewById(R.id.et_od);
final DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
start_calendar.set(Calendar.YEAR, year);
start_calendar.set(Calendar.MONTH, monthOfYear);
start_calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
update_et(et_start, start_calendar);
}
};
et_start.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
new DatePickerDialog(PrzeliczanieDniRoboczych.this, date,
start_calendar.get(Calendar.YEAR), start_calendar
.get(Calendar.MONTH), start_calendar
.get(Calendar.DAY_OF_MONTH)).show();
}
});
}
public void gather_end_date() { //getting end date
et_end = (EditText) findViewById(R.id.et_do);
final DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
end_calendar.set(Calendar.YEAR, year);
end_calendar.set(Calendar.MONTH, monthOfYear);
end_calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
update_et(et_end, end_calendar);
}
};
et_end.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
new DatePickerDialog(PrzeliczanieDniRoboczych.this, date,
end_calendar.get(Calendar.YEAR), end_calendar
.get(Calendar.MONTH), end_calendar
.get(Calendar.DAY_OF_MONTH)).show();
}
});
}
public void after_clicking_count() { //after clicking "Calculate"
work_days = 0;
count = (Button) findViewById(R.id.b_count_workdays);
count.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
work_days = getWorkingDaysBetweenTwoDates();
}
});
}
public int getWorkingDaysBetweenTwoDates() { //getting working days between two dates
workDays = 0;
totalDays = 0;
// Return 0 if start and end are the same
if (et_start.getText().toString().trim().length() == 0
|| et_end.getText().toString().trim().length() == 0
|| et_start.getText().toString().matches("dd/mm/yy")
|| et_end.getText().toString().matches("dd/mm/yy")) {
Toast.makeText(getApplicationContext(), "Choose dates!",
Toast.LENGTH_SHORT).show();
return 0;
} else {
if (start_calendar.getTimeInMillis() > end_calendar
.getTimeInMillis()) {
Toast.makeText(PrzeliczanieDniRoboczych.this,
"Start date has to be before end date",
Toast.LENGTH_SHORT).show();
} else {
for (; start_calendar.getTimeInMillis() <= end_calendar
.getTimeInMillis(); start_calendar.add(
Calendar.DAY_OF_MONTH, 1)) {
totalDays++;
if (start_calendar.get(Calendar.DAY_OF_WEEK) != Calendar.SATURDAY
&& start_calendar.get(Calendar.DAY_OF_WEEK) != Calendar.SUNDAY) {
workDays++;
}
}
start_calendar.add(Calendar.DAY_OF_MONTH, -1 * totalDays);
Toast.makeText(PrzeliczanieDniRoboczych.this,
"Workday is this period are: " + workDays,
Toast.LENGTH_SHORT).show();
}
return workDays;
}
}
I would like to add the mechanism that will allow user to insert dates of holidays (this aplication will calculate the salary and holidays means no salary, so it's important).
As I saw here, user SimplyPanda suggested adding an ArrayList<Integer> to do so. However, I wondering how the inserting by user should look like.
Should user know the integer representation of particular dates in Java? - I guess no.
Does anyone have any idea how to implement such functionality?

A run-time error prevent my to-do application to start

This is what I found in the LogCat:
02-26 05:10:44.943: E/AndroidRuntime(844): FATAL EXCEPTION: main
02-26 05:10:44.943: E/AndroidRuntime(844): java.lang.RuntimeException: Unable to start activity ComponentInfo{course.labs.todomanager/course.labs.todomanager.ToDoManagerActivity}: android.content.res.Resources$NotFoundException: Resource ID #0x7f060013 type #0x12 is not valid
02-26 05:10:44.943: E/AndroidRuntime(844): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.app.ActivityThread.access$600(ActivityThread.java:141)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.os.Handler.dispatchMessage(Handler.java:99)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.os.Looper.loop(Looper.java:137)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.app.ActivityThread.main(ActivityThread.java:5103)
02-26 05:10:44.943: E/AndroidRuntime(844): at java.lang.reflect.Method.invokeNative(Native Method)
02-26 05:10:44.943: E/AndroidRuntime(844): at java.lang.reflect.Method.invoke(Method.java:525)
02-26 05:10:44.943: E/AndroidRuntime(844): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
02-26 05:10:44.943: E/AndroidRuntime(844): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-26 05:10:44.943: E/AndroidRuntime(844): at dalvik.system.NativeStart.main(Native Method)
02-26 05:10:44.943: E/AndroidRuntime(844): Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f060013 type #0x12 is not valid
02-26 05:10:44.943: E/AndroidRuntime(844): at android.content.res.Resources.loadXmlResourceParser(Resources.java:2309)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.content.res.Resources.getLayout(Resources.java:934)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.view.LayoutInflater.inflate(LayoutInflater.java:395)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
02-26 05:10:44.943: E/AndroidRuntime(844): at course.labs.todomanager.ToDoManagerActivity.onCreate(ToDoManagerActivity.java:56)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.app.Activity.performCreate(Activity.java:5133)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
02-26 05:10:44.943: E/AndroidRuntime(844): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
02-26 05:10:44.943: E/AndroidRuntime(844): ... 11 more
The Applicaion is a to-do app and it has 4 activities as follows:
1- ToDoManagerActivity
package course.labs.todomanager;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.text.ParseException;
import java.util.Date;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ListView;
import android.widget.TextView;
import course.labs.todomanager.ToDoItem.Priority;
import course.labs.todomanager.ToDoItem.Status;
public class ToDoManagerActivity extends ListActivity {
// Add a ToDoItem Request Code
private static final int ADD_TODO_ITEM_REQUEST = 0;
private static final String FILE_NAME = "TodoManagerActivityData.txt";
private static final String TAG = "Lab-UserInterface";
// IDs for menu items
private static final int MENU_DELETE = Menu.FIRST;
private static final int MENU_DUMP = Menu.FIRST + 1;
ToDoListAdapter mAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create a new TodoListAdapter for this ListActivity's ListView
mAdapter = new ToDoListAdapter(getApplicationContext());
// Put divider between ToDoItems and FooterView
getListView().setFooterDividersEnabled(true);
//TODO - Inflate footerView for footer_view.xml file
TextView footerView = (TextView) findViewById(R.id.footerView);
LayoutInflater li = getLayoutInflater();
li.inflate(R.id.footerView, getListView());
//TODO - Add footerView to ListView
ListView lv = getListView();
lv.addFooterView(footerView);
footerView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered footerView.OnClickListener.onClick()");
//TODO - Attach Listener to FooterView. Implement onClick().
Intent intent = new Intent(ToDoManagerActivity.this, AddToDoActivity.class);
startActivityForResult(intent, ADD_TODO_ITEM_REQUEST);
}
});
//TODO - Attach the adapter to this ListActivity's ListView
lv.setAdapter(mAdapter);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
log("Entered onActivityResult()");
// TODO - Check result code and request code.
// If user submitted a new ToDoItem
// Create a new ToDoItem from the data Intent
// and then add it to the adapter
if (requestCode == ADD_TODO_ITEM_REQUEST && resultCode == RESULT_OK)
{
ToDoItem toDoItem = new ToDoItem(data);
mAdapter.add(toDoItem);
}
}
// Do not modify below here
#Override
public void onResume() {
super.onResume();
// Load saved ToDoItems, if necessary
if (mAdapter.getCount() == 0)
loadItems();
}
#Override
protected void onPause() {
super.onPause();
// Save ToDoItems
saveItems();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(Menu.NONE, MENU_DELETE, Menu.NONE, "Delete all");
menu.add(Menu.NONE, MENU_DUMP, Menu.NONE, "Dump to log");
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case MENU_DELETE:
mAdapter.clear();
return true;
case MENU_DUMP:
dump();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void dump() {
for (int i = 0; i < mAdapter.getCount(); i++) {
String data = ((ToDoItem) mAdapter.getItem(i)).toLog();
log("Item " + i + ": " + data.replace(ToDoItem.ITEM_SEP, ","));
}
}
// Load stored ToDoItems
private void loadItems() {
BufferedReader reader = null;
try {
FileInputStream fis = openFileInput(FILE_NAME);
reader = new BufferedReader(new InputStreamReader(fis));
String title = null;
String priority = null;
String status = null;
Date date = null;
while (null != (title = reader.readLine())) {
priority = reader.readLine();
status = reader.readLine();
date = ToDoItem.FORMAT.parse(reader.readLine());
mAdapter.add(new ToDoItem(title, Priority.valueOf(priority),
Status.valueOf(status), date));
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} finally {
if (null != reader) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
// Save ToDoItems to file
private void saveItems() {
PrintWriter writer = null;
try {
FileOutputStream fos = openFileOutput(FILE_NAME, MODE_PRIVATE);
writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(
fos)));
for (int idx = 0; idx < mAdapter.getCount(); idx++) {
writer.println(mAdapter.getItem(idx));
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != writer) {
writer.close();
}
}
}
private void log(String msg) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(TAG, msg);
}
}
2- ToDoListAdapter:
package course.labs.todomanager;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.RelativeLayout;
import android.widget.TextView;
import course.labs.todomanager.ToDoItem.Status;
public class ToDoListAdapter extends BaseAdapter {
// List of ToDoItems
private final List<ToDoItem> mItems = new ArrayList<ToDoItem>();
private final Context mContext;
private static final String TAG = "Lab-UserInterface";
public ToDoListAdapter(Context context) {
mContext = context;
}
// Add a ToDoItem to the adapter
// Notify observers that the data set has changed
public void add(ToDoItem item) {
mItems.add(item);
notifyDataSetChanged();
}
// Clears the list adapter of all items.
public void clear(){
mItems.clear();
notifyDataSetChanged();
}
// Returns the number of ToDoItems
#Override
public int getCount() {
return mItems.size();
}
// Retrieve the number of ToDoItems
#Override
public Object getItem(int pos) {
return mItems.get(pos);
}
// Get the ID for the ToDoItem
// In this case it's just the position
#Override
public long getItemId(int pos) {
return pos;
}
//Create a View to display the ToDoItem
// at specified position in mItems
#Override
public View getView(int position, View convertView, ViewGroup parent) {
//TODO - Get the current ToDoItem
final ToDoItem toDoItem = (ToDoItem) getItem(position);
//TODO - Inflate the View for this ToDoItem
// from todo_item.xml.
RelativeLayout itemLayout = (RelativeLayout) View.inflate(mContext, R.layout.todo_item, parent);
//TODO - Fill in specific ToDoItem data
// Remember that the data that goes in this View
// corresponds to the user interface elements defined
// in the layout file
//TODO - Display Title in TextView
final TextView titleView = (TextView) convertView.findViewById(R.id.titleView);
titleView.setText(toDoItem.getTitle());
// TODO - Set up Status CheckBox
final CheckBox statusView = (CheckBox) convertView.findViewById(R.id.statusCheckBox);
statusView.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
log("Entered onCheckedChanged()");
// TODO - Set up and implement an OnCheckedChangeListener, which
// is called when the user toggles the status checkbox
if(isChecked)
{
toDoItem.setStatus(Status.DONE);
}
else
{
toDoItem.setStatus(Status.NOTDONE);
}
}
});
//TODO - Display Priority in a TextView
final TextView priorityView = (TextView) convertView.findViewById(R.id.priorityView);
priorityView.setTag(toDoItem.getPriority());
// TODO - Display Time and Date.
// Hint - use ToDoItem.FORMAT.format(toDoItem.getDate()) to get date and time String
final TextView dateView = (TextView) convertView.findViewById(R.id.dateView);
dateView.setText(ToDoItem.FORMAT.format(toDoItem.getDate()));
// Return the View you just created
return itemLayout;
}
private void log(String msg) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(TAG, msg);
}
}
3- AddToDoActivity
package course.labs.todomanager;
import java.util.Calendar;
import java.util.Date;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.TimePicker;
import course.labs.todomanager.ToDoItem.Priority;
import course.labs.todomanager.ToDoItem.Status;
public class AddToDoActivity extends Activity {
// 7 days in milliseconds - 7 * 24 * 60 * 60 * 1000
private static final int SEVEN_DAYS = 604800000;
private static final String TAG = "Lab-UserInterface";
private static String timeString;
private static String dateString;
private static TextView dateView;
private static TextView timeView;
private Date mDate;
private RadioGroup mPriorityRadioGroup;
private RadioGroup mStatusRadioGroup;
private EditText mTitleText;
private RadioButton mDefaultStatusButton;
private RadioButton mDefaultPriorityButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_todo);
mTitleText = (EditText) findViewById(R.id.title);
mDefaultStatusButton = (RadioButton) findViewById(R.id.statusNotDone);
mDefaultPriorityButton = (RadioButton) findViewById(R.id.medPriority);
mPriorityRadioGroup = (RadioGroup) findViewById(R.id.priorityGroup);
mStatusRadioGroup = (RadioGroup) findViewById(R.id.statusGroup);
dateView = (TextView) findViewById(R.id.date);
timeView = (TextView) findViewById(R.id.time);
// Set the default date and time
setDefaultDateTime();
// OnClickListener for the Date button, calls showDatePickerDialog() to show
// the Date dialog
final Button datePickerButton = (Button) findViewById(R.id.date_picker_button);
datePickerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
showDatePickerDialog();
}
});
// OnClickListener for the Time button, calls showTimePickerDialog() to show
// the Time Dialog
final Button timePickerButton = (Button) findViewById(R.id.time_picker_button);
timePickerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
showTimePickerDialog();
}
});
// OnClickListener for the Cancel Button,
final Button cancelButton = (Button) findViewById(R.id.cancelButton);
cancelButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered cancelButton.OnClickListener.onClick()");
//TODO - Implement onClick().
setResult(RESULT_CANCELED);
finish();
}
});
//OnClickListener for the Reset Button
final Button resetButton = (Button) findViewById(R.id.resetButton);
resetButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered resetButton.OnClickListener.onClick()");
//TODO - Reset data fields to default values
mTitleText.setText(R.id.title);
mPriorityRadioGroup = (RadioGroup) findViewById(R.id.priorityGroup);
mStatusRadioGroup = (RadioGroup) findViewById(R.id.statusGroup);
setDefaultDateTime();
}
});
// OnClickListener for the Submit Button
// Implement onClick().
final Button submitButton = (Button) findViewById(R.id.submitButton);
submitButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered submitButton.OnClickListener.onClick()");
// Gather ToDoItem data
//TODO - Get Priority
Priority priority = getPriority();
//TODO - Get Status
Status status = getStatus();
//TODO - Title
String titleString = mTitleText.getPrivateImeOptions();
// Date
String fullDate = dateString + " " + timeString;
// Package ToDoItem data into an Intent
Intent data = new Intent();
ToDoItem.packageIntent(data, titleString, priority, status, fullDate);
//TODO - return data Intent and finish
setResult(RESULT_OK);
finish();
}
});
}
// Do not modify below here
// Use this method to set the default date and time
private void setDefaultDateTime() {
// Default is current time + 7 days
mDate = new Date();
mDate = new Date(mDate.getTime() + SEVEN_DAYS);
Calendar c = Calendar.getInstance();
c.setTime(mDate);
setDateString(c.get(Calendar.YEAR), c.get(Calendar.MONTH),
c.get(Calendar.DAY_OF_MONTH));
dateView.setText(dateString);
setTimeString(c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE),
c.get(Calendar.MILLISECOND));
timeView.setText(timeString);
}
private static void setDateString(int year, int monthOfYear, int dayOfMonth) {
// Increment monthOfYear for Calendar/Date -> Time Format setting
monthOfYear++;
String mon = "" + monthOfYear;
String day = "" + dayOfMonth;
if (monthOfYear < 10)
mon = "0" + monthOfYear;
if (dayOfMonth < 10)
day = "0" + dayOfMonth;
dateString = year + "-" + mon + "-" + day;
}
private static void setTimeString(int hourOfDay, int minute, int mili) {
String hour = "" + hourOfDay;
String min = "" + minute;
if (hourOfDay < 10)
hour = "0" + hourOfDay;
if (minute < 10)
min = "0" + minute;
timeString = hour + ":" + min + ":00";
}
private Priority getPriority() {
switch (mPriorityRadioGroup.getCheckedRadioButtonId()) {
case R.id.lowPriority: {
return Priority.LOW;
}
case R.id.highPriority: {
return Priority.HIGH;
}
default: {
return Priority.MED;
}
}
}
private Status getStatus() {
switch (mStatusRadioGroup.getCheckedRadioButtonId()) {
case R.id.statusDone: {
return Status.DONE;
}
default: {
return Status.NOTDONE;
}
}
}
// DialogFragment used to pick a ToDoItem deadline date
public static class DatePickerFragment extends DialogFragment implements
DatePickerDialog.OnDateSetListener {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
setDateString(year, monthOfYear, dayOfMonth);
dateView.setText(dateString);
}
}
// DialogFragment used to pick a ToDoItem deadline time
public static class TimePickerFragment extends DialogFragment implements
TimePickerDialog.OnTimeSetListener {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return
return new TimePickerDialog(getActivity(), this, hour, minute,
true);
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
setTimeString(hourOfDay, minute, 0);
timeView.setText(timeString);
}
}
private void showDatePickerDialog() {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getFragmentManager(), "datePicker");
}
private void showTimePickerDialog() {
DialogFragment newFragment = new TimePickerFragment();
newFragment.show(getFragmentManager(), "timePicker");
}
private void log(String msg) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(TAG, msg);
}
}
4- ToDoItem
package course.labs.todomanager;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import android.content.Intent;
// Do not modify
public class ToDoItem {
public static final String ITEM_SEP = System.getProperty("line.separator");
public enum Priority {
LOW, MED, HIGH
};
public enum Status {
NOTDONE, DONE
};
public final static String TITLE = "title";
public final static String PRIORITY = "priority";
public final static String STATUS = "status";
public final static String DATE = "date";
public final static String FILENAME = "filename";
public final static SimpleDateFormat FORMAT = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss", Locale.US);
private String mTitle = new String();
private Priority mPriority = Priority.LOW;
private Status mStatus = Status.NOTDONE;
private Date mDate = new Date();
ToDoItem(String title, Priority priority, Status status, Date date) {
this.mTitle = title;
this.mPriority = priority;
this.mStatus = status;
this.mDate = date;
}
// Create a new ToDoItem from data packaged in an Intent
ToDoItem(Intent intent) {
mTitle = intent.getStringExtra(ToDoItem.TITLE);
mPriority = Priority.valueOf(intent.getStringExtra(ToDoItem.PRIORITY));
mStatus = Status.valueOf(intent.getStringExtra(ToDoItem.STATUS));
try {
mDate = ToDoItem.FORMAT.parse(intent.getStringExtra(ToDoItem.DATE));
} catch (ParseException e) {
mDate = new Date();
}
}
public String getTitle() {
return mTitle;
}
public void setTitle(String title) {
mTitle = title;
}
public Priority getPriority() {
return mPriority;
}
public void setPriority(Priority priority) {
mPriority = priority;
}
public Status getStatus() {
return mStatus;
}
public void setStatus(Status status) {
mStatus = status;
}
public Date getDate() {
return mDate;
}
public void setDate(Date date) {
mDate = date;
}
// Take a set of String data values and
// package them for transport in an Intent
public static void packageIntent(Intent intent, String title,
Priority priority, Status status, String date) {
intent.putExtra(ToDoItem.TITLE, title);
intent.putExtra(ToDoItem.PRIORITY, priority.toString());
intent.putExtra(ToDoItem.STATUS, status.toString());
intent.putExtra(ToDoItem.DATE, date);
}
public String toString() {
return mTitle + ITEM_SEP + mPriority + ITEM_SEP + mStatus + ITEM_SEP
+ FORMAT.format(mDate);
}
public String toLog() {
return "Title:" + mTitle + ITEM_SEP + "Priority:" + mPriority
+ ITEM_SEP + "Status:" + mStatus + ITEM_SEP + "Date:"
+ FORMAT.format(mDate);
}
}
Can anybody help?

li.inflate(R.id.footerView, getListView());
You cannot inflate ids, only layouts.
Replace R.id.footerView with R.layout.your_footer_view_layout.
Also, you probably want to capture the inflated View to some variable to actually use it later.

Try this:
//Inflate footerView for footer_view.xml file
TextView footerView = (TextView) getLayoutInflater().inflate(R.layout.footer_view, null);

You should replace setTag(). Change
priorityView.setTag(toDoItem.getPriority());
to
priorityView.setText(toDoItem.getPriority().ToString());

Completing UI Activity assignment [closed]

Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 9 years ago.
Improve this question
I have a UI Lab for Android Programming that I'm trying to complete. I think I'm close, yet so far away. I have four activities that I'm working with but only three of them needed worked on. Here is what I have. I need help with what I'm missing.
Here's the first Activity which is AddToDoActivity
package course.labs.todomanager;
import java.util.Calendar;
import java.util.Date;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.TimePicker;
import course.labs.todomanager.ToDoItem.Priority;
import course.labs.todomanager.ToDoItem.Status;
public class AddToDoActivity extends Activity {
// 7 days in milliseconds - 7 * 24 * 60 * 60 * 1000
private static final int SEVEN_DAYS = 604800000;
private static final String TAG = "Lab-UserInterface";
private static String timeString;
private static String dateString;
private static TextView dateView;
private static TextView timeView;
private Date mDate;
private RadioGroup mPriorityRadioGroup;
private RadioGroup mStatusRadioGroup;
private EditText mTitleText;
private RadioButton mDefaultStatusButton;
private RadioButton mDefaultPriorityButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_todo);
mTitleText = (EditText) findViewById(R.id.title);
mDefaultStatusButton = (RadioButton) findViewById(R.id.statusNotDone);
mDefaultPriorityButton = (RadioButton) findViewById(R.id.medPriority);
mPriorityRadioGroup = (RadioGroup) findViewById(R.id.priorityGroup);
mStatusRadioGroup = (RadioGroup) findViewById(R.id.statusGroup);
dateView = (TextView) findViewById(R.id.date);
timeView = (TextView) findViewById(R.id.time);
// Set the default date and time
setDefaultDateTime();
// OnClickListener for the Date button, calls showDatePickerDialog() to show
// the Date dialog
final Button datePickerButton = (Button) findViewById(R.id.date_picker_button);
datePickerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
showDatePickerDialog();
}
});
// OnClickListener for the Time button, calls showTimePickerDialog() to show
// the Time Dialog
final Button timePickerButton = (Button) findViewById(R.id.time_picker_button);
timePickerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
showTimePickerDialog();
}
});
// OnClickListener for the Cancel Button,
final Button cancelButton = (Button) findViewById(R.id.cancelButton);
cancelButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered cancelButton.OnClickListener.onClick()");
//TODO - Implement onClick().
Intent intent = new Intent setResult;
finish();
}
});
//OnClickListener for the Reset Button
final Button resetButton = (Button) findViewById(R.id.resetButton);
resetButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered resetButton.OnClickListener.onClick()");
//TODO - Reset data fields to default values
setDefaultDateTime();
mTitleText.setText("");
mDefaultStatusButton.setChecked(true);
mDefaultPriorityButton.setChecked(true);
}
});
// OnClickListener for the Submit Button
// Implement onClick().
final Button submitButton = (Button) findViewById(R.id.submitButton);
submitButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered submitButton.OnClickListener.onClick()");
// Gather ToDoItem data
//TODO - Get Priority
Priority priority = getPriority();
//TODO - Get Status
Status status = getStatus();
//TODO - Title
String titleString = mTitleText.getText().toString();
// Date
String fullDate = dateString + " " + timeString;
// Package ToDoItem data into an Intent
Intent data = new Intent();
ToDoItem.packageIntent(data, titleString, priority, status, fullDate);
//TODO - return data Intent and finish
setResult(Activity.RESULT_OK, data);
finish();
}
});
}
// Do not modify below here
// Use this method to set the default date and time
private void setDefaultDateTime() {
// Default is current time + 7 days
mDate = new Date();
mDate = new Date(mDate.getTime() + SEVEN_DAYS);
Calendar c = Calendar.getInstance();
c.setTime(mDate);
setDateString(c.get(Calendar.YEAR), c.get(Calendar.MONTH),
c.get(Calendar.DAY_OF_MONTH));
dateView.setText(dateString);
setTimeString(c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE),
c.get(Calendar.MILLISECOND));
timeView.setText(timeString);
}
private static void setDateString(int year, int monthOfYear, int dayOfMonth) {
// Increment monthOfYear for Calendar/Date -> Time Format setting
monthOfYear++;
String mon = "" + monthOfYear;
String day = "" + dayOfMonth;
if (monthOfYear < 10)
mon = "0" + monthOfYear;
if (dayOfMonth < 10)
day = "0" + dayOfMonth;
dateString = year + "-" + mon + "-" + day;
}
private static void setTimeString(int hourOfDay, int minute, int mili) {
String hour = "" + hourOfDay;
String min = "" + minute;
if (hourOfDay < 10)
hour = "0" + hourOfDay;
if (minute < 10)
min = "0" + minute;
timeString = hour + ":" + min + ":00";
}
private Priority getPriority() {
switch (mPriorityRadioGroup.getCheckedRadioButtonId()) {
case R.id.lowPriority: {
return Priority.LOW;
}
case R.id.highPriority: {
return Priority.HIGH;
}
default: {
return Priority.MED;
}
}
}
private Status getStatus() {
switch (mStatusRadioGroup.getCheckedRadioButtonId()) {
case R.id.statusDone: {
return Status.DONE;
}
default: {
return Status.NOTDONE;
}
}
}
// DialogFragment used to pick a ToDoItem deadline date
public static class DatePickerFragment extends DialogFragment implements
DatePickerDialog.OnDateSetListener {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
setDateString(year, monthOfYear, dayOfMonth);
dateView.setText(dateString);
}
}
// DialogFragment used to pick a ToDoItem deadline time
public static class TimePickerFragment extends DialogFragment implements
TimePickerDialog.OnTimeSetListener {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return
return new TimePickerDialog(getActivity(), this, hour, minute,
true);
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
setTimeString(hourOfDay, minute, 0);
timeView.setText(timeString);
}
}
private void showDatePickerDialog() {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getFragmentManager(), "datePicker");
}
private void showTimePickerDialog() {
DialogFragment newFragment = new TimePickerFragment();
newFragment.show(getFragmentManager(), "timePicker");
}
private void log(String msg) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(TAG, msg);
}
}
Here's the second activity which is ToDoItem
package course.labs.todomanager;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import android.content.Intent;
// Do not modify
public class ToDoItem {
public static final String ITEM_SEP = System.getProperty("line.separator");
public enum Priority {
LOW, MED, HIGH
};
public enum Status {
NOTDONE, DONE
};
public final static String TITLE = "title";
public final static String PRIORITY = "priority";
public final static String STATUS = "status";
public final static String DATE = "date";
public final static String FILENAME = "filename";
public final static SimpleDateFormat FORMAT = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss", Locale.US);
private String mTitle = new String();
private Priority mPriority = Priority.LOW;
private Status mStatus = Status.NOTDONE;
private Date mDate = new Date();
ToDoItem(String title, Priority priority, Status status, Date date) {
this.mTitle = title;
this.mPriority = priority;
this.mStatus = status;
this.mDate = date;
}
// Create a new ToDoItem from data packaged in an Intent
ToDoItem(Intent intent) {
mTitle = intent.getStringExtra(ToDoItem.TITLE);
mPriority = Priority.valueOf(intent.getStringExtra(ToDoItem.PRIORITY));
mStatus = Status.valueOf(intent.getStringExtra(ToDoItem.STATUS));
try {
mDate = ToDoItem.FORMAT.parse(intent.getStringExtra(ToDoItem.DATE));
} catch (ParseException e) {
mDate = new Date();
}
}
public String getTitle() {
return mTitle;
}
public void setTitle(String title) {
mTitle = title;
}
public Priority getPriority() {
return mPriority;
}
public void setPriority(Priority priority) {
mPriority = priority;
}
public Status getStatus() {
return mStatus;
}
public void setStatus(Status status) {
mStatus = status;
}
public Date getDate() {
return mDate;
}
public void setDate(Date date) {
mDate = date;
}
// Take a set of String data values and
// package them for transport in an Intent
public static void packageIntent(Intent intent, String title,
Priority priority, Status status, String date) {
intent.putExtra(ToDoItem.TITLE, title);
intent.putExtra(ToDoItem.PRIORITY, priority.toString());
intent.putExtra(ToDoItem.STATUS, status.toString());
intent.putExtra(ToDoItem.DATE, date);
}
public String toString() {
return mTitle + ITEM_SEP + mPriority + ITEM_SEP + mStatus + ITEM_SEP
+ FORMAT.format(mDate);
}
public String toLog() {
return "Title:" + mTitle + ITEM_SEP + "Priority:" + mPriority
+ ITEM_SEP + "Status:" + mStatus + ITEM_SEP + "Date:"
+ FORMAT.format(mDate);
}
}
Here's the third activity which is ToDoListAdapter
package course.labs.todomanager;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.RelativeLayout;
import android.widget.TextView;
import course.labs.todomanager.ToDoItem.Status;
public class ToDoListAdapter extends BaseAdapter {
// List of ToDoItems
private final List<ToDoItem> mItems = new ArrayList<ToDoItem>();
private final Context mContext;
private static final String TAG = "Lab-UserInterface";
public ToDoListAdapter(Context context) {
mContext = context;
}
// Add a ToDoItem to the adapter
// Notify observers that the data set has changed
public void add(ToDoItem item) {
mItems.add(item);
notifyDataSetChanged();
}
// Clears the list adapter of all items.
public void clear(){
mItems.clear();
notifyDataSetChanged();
}
// Returns the number of ToDoItems
#Override
public int getCount() {
return mItems.size();
}
// Retrieve the number of ToDoItems
#Override
public Object getItem(int pos) {
return mItems.get(pos);
}
// Get the ID for the ToDoItem
// In this case it's just the position
#Override
public long getItemId(int pos) {
return pos;
}
//Create a View to display the ToDoItem
// at specified position in mItems
#Override
public View getView(int position, View convertView, ViewGroup parent) {
//TODO - Get the current ToDoItem
final ToDoItem toDoItem = getItemPos();
//TODO - Inflate the View for this ToDoItem
// from todo_item.xml.
LayoutInflater = itemLayout;
RelativeLayout itemLayout = m.context.getSystemService(R.layout.todo_item);
//TODO - Fill in specific ToDoItem data
// Remember that the data that goes in this View
// corresponds to the user interface elements defined
// in the layout file
//TODO - Display Title in TextView
final TextView titleView = ItemLayout.findViewById;
setTextView;
//TODO - Set up Status CheckBox
final CheckBox statusView = ItemLayout.findViewById(R.id.statusCheckBox);
statusView.setChecked(checked) statusDone;
statusView.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
log("Entered onCheckedChanged()");
//TODO - Set up and implement an OnCheckedChangeListener, which
// is called when the user toggles the status checkbox
if isChecked ToDoItem.setStatus status.Done(true);
else
}
});
//TODO - Display Priority in a TextView
final TextView priorityView = findViewByID(R.id.PriorityView);
PriorityView.setToString();
//TODO - Display Time and Date.
// Hint - use ToDoItem.FORMAT.format(toDoItem.getDate()) to get date and time String
final TextView dateView = itemLayout.findViewById(R.id.dateView);
dateView.setText(ToDoItem.FORMAT);
// Return the View you just created
return itemLayout;
}
private void log(String msg) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(TAG, msg);
}
}
And here is the fourth activity which is ToDoManagerActivity
package course.labs.todomanager;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.text.ParseException;
import java.util.Date;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
import course.labs.todomanager.ToDoItem.Priority;
import course.labs.todomanager.ToDoItem.Status;
public class ToDoManagerActivity extends ListActivity {
// Add a ToDoItem Request Code
private static final int ADD_TODO_ITEM_REQUEST = 0;
private static final String FILE_NAME = "TodoManagerActivityData.txt";
private static final String TAG = "Lab-UserInterface";
// IDs for menu items
private static final int MENU_DELETE = Menu.FIRST;
private static final int MENU_DUMP = Menu.FIRST + 1;
ToDoListAdapter mAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create a new TodoListAdapter for this ListActivity's ListView
mAdapter = new ToDoListAdapter(getApplicationContext());
// Put divider between ToDoItems and FooterView
getListView().setFooterDividersEnabled(true);
//TODO - Inflate footerView for footer_view.xml file
TextView footerView = TextView().getLayoutInflater()
.inflate(R.layout.footer_view, null);
//TODO - Add footerView to ListView
getListView fv = (ListView)findViewById(R.layout.footer_view);
footerView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered footerView.OnClickListener.onClick()");
//TODO - Attach Listener to FooterView. Implement onClick().
Intent intent = new Intent(getBaseContext(), AddToDoActivity.class);
startActivityForResult(intent, ADD_TODO_ITEM_REQUEST);
}
});
//TODO - Attach the adapter to this ListActivity's ListView
getListView.footer_view.setAdapter(mAdapter, fv);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
log("Entered onActivityResult()");
// TODO - Check result code and request code.
// If user submitted a new ToDoItem
// Create a new ToDoItem from the data Intent
// and then add it to the adapter
if requestCode == ADD_TODO_ITEM_REQUEST {
also if resultCode != RESULT_OK(true);
new mAdapter++;
}
}
// Do not modify below here
#Override
public void onResume() {
super.onResume();
// Load saved ToDoItems, if necessary
if (mAdapter.getCount() == 0)
loadItems();
}
#Override
protected void onPause() {
super.onPause();
// Save ToDoItems
saveItems();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(Menu.NONE, MENU_DELETE, Menu.NONE, "Delete all");
menu.add(Menu.NONE, MENU_DUMP, Menu.NONE, "Dump to log");
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case MENU_DELETE:
mAdapter.clear();
return true;
case MENU_DUMP:
dump();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void dump() {
for (int i = 0; i < mAdapter.getCount(); i++) {
String data = ((ToDoItem) mAdapter.getItem(i)).toLog();
log("Item " + i + ": " + data.replace(ToDoItem.ITEM_SEP, ","));
}
}
// Load stored ToDoItems
private void loadItems() {
BufferedReader reader = null;
try {
FileInputStream fis = openFileInput(FILE_NAME);
reader = new BufferedReader(new InputStreamReader(fis));
String title = null;
String priority = null;
String status = null;
Date date = null;
while (null != (title = reader.readLine())) {
priority = reader.readLine();
status = reader.readLine();
date = ToDoItem.FORMAT.parse(reader.readLine());
mAdapter.add(new ToDoItem(title, Priority.valueOf(priority),
Status.valueOf(status), date));
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} finally {
if (null != reader) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
// Save ToDoItems to file
private void saveItems() {
PrintWriter writer = null;
try {
FileOutputStream fos = openFileOutput(FILE_NAME, MODE_PRIVATE);
writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(
fos)));
for (int idx = 0; idx < mAdapter.getCount(); idx++) {
writer.println(mAdapter.getItem(idx));
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != writer) {
writer.close();
}
}
}
private void log(String msg) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(TAG, msg);
}
}
Any thought on how to improve the cancelButton code in the AddToDoAcitivity?
final Button cancelButton = (Button) findViewById(R.id.cancelButton);
cancelButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered cancelButton.OnClickListener.onClick()");
//TODO - Implement onClick().
Intent intent = new Intent setResult;
finish();
}
});

change your AddToDoActivity code like this
public class AddToDoActivity extends Activity {
// 7 days in milliseconds - 7 * 24 * 60 * 60 * 1000
private static final int SEVEN_DAYS = 604800000;
private static final String TAG = "Lab-UserInterface";
private static String timeString;
private static String dateString;
private static TextView dateView;
private static TextView timeView;
private Date mDate;
private RadioGroup mPriorityRadioGroup;
private RadioGroup mStatusRadioGroup;
private EditText mTitleText;
private RadioButton mDefaultStatusButton;
private RadioButton mDefaultPriorityButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_todo);
mTitleText = (EditText) findViewById(R.id.title);
mDefaultStatusButton = (RadioButton) findViewById(R.id.statusNotDone);
mDefaultPriorityButton = (RadioButton) findViewById(R.id.medPriority);
mPriorityRadioGroup = (RadioGroup) findViewById(R.id.priorityGroup);
mStatusRadioGroup = (RadioGroup) findViewById(R.id.statusGroup);
dateView = (TextView) findViewById(R.id.date);
timeView = (TextView) findViewById(R.id.time);
// Set the default date and time
setDefaultDateTime();
// OnClickListener for the Date button, calls showDatePickerDialog() to show
// the Date dialog
final Button datePickerButton = (Button) findViewById(R.id.date_picker_button);
datePickerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
showDatePickerDialog();
}
});
// OnClickListener for the Time button, calls showTimePickerDialog() to show
// the Time Dialog
final Button timePickerButton = (Button) findViewById(R.id.time_picker_button);
timePickerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
showTimePickerDialog();
}
});
// OnClickListener for the Cancel Button,
final Button cancelButton = (Button) findViewById(R.id.cancelButton);
cancelButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered cancelButton.OnClickListener.onClick()");
finish();
}
});
//OnClickListener for the Reset Button
final Button resetButton = (Button) findViewById(R.id.resetButton);
resetButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered resetButton.OnClickListener.onClick()");
setDefaultDateTime();
mTitleText.setText("");
mDefaultStatusButton.setChecked(true);
mDefaultPriorityButton.setChecked(true);
}
});
// OnClickListener for the Submit Button
// Implement onClick().
final Button submitButton = (Button) findViewById(R.id.submitButton);
submitButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered submitButton.OnClickListener.onClick()");
// Gather ToDoItem data
Priority priority = getPriority();
Status status = getStatus();
String titleString = mTitleText.getText().toString();
// Date
String fullDate = dateString + " " + timeString;
// Package ToDoItem data into an Intent
Intent data = new Intent();
ToDoItem.packageIntent(data, titleString, priority, status, fullDate);
setResult(Activity.RESULT_OK, data);
finish();
}
});
}
// Do not modify below here
// Use this method to set the default date and time
private void setDefaultDateTime() {
// Default is current time + 7 days
mDate = new Date();
mDate = new Date(mDate.getTime() + SEVEN_DAYS);
Calendar c = Calendar.getInstance();
c.setTime(mDate);
setDateString(c.get(Calendar.DAY_OF_MONTH), c.get(Calendar.MONTH),
c.get(Calendar.YEAR));
dateView.setText(dateString);
setTimeString(c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE),
c.get(Calendar.MILLISECOND));
timeView.setText(timeString);
}
private static void setDateString(int dayOfMonth, int monthOfYear, int year) {
// Increment monthOfYear for Calendar/Date -> Time Format setting
monthOfYear++;
String mon = "" + monthOfYear;
String day = "" + dayOfMonth;
if (monthOfYear < 10)
mon = "0" + monthOfYear;
if (dayOfMonth < 10)
day = "0" + dayOfMonth;
dateString = year + "-" + mon + "-" + day;
}
private static void setTimeString(int hourOfDay, int minute, int mili) {
String hour = "" + hourOfDay;
String min = "" + minute;
if (hourOfDay < 10)
hour = "0" + hourOfDay;
if (minute < 10)
min = "0" + minute;
timeString = hour + ":" + min + ":00";
}
private Priority getPriority() {
switch (mPriorityRadioGroup.getCheckedRadioButtonId()) {
case R.id.lowPriority: {
return Priority.LOW;
}
case R.id.highPriority: {
return Priority.HIGH;
}
default: {
return Priority.MED;
}
}
}
private Status getStatus() {
switch (mStatusRadioGroup.getCheckedRadioButtonId()) {
case R.id.statusDone: {
return Status.DONE;
}
default: {
return Status.NOTDONE;
}
}
}
// DialogFragment used to pick a ToDoItem deadline date
public static class DatePickerFragment extends DialogFragment implements
DatePickerDialog.OnDateSetListener {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int day = c.get(Calendar.DAY_OF_MONTH);
int month = c.get(Calendar.MONTH);
int year = c.get(Calendar.YEAR);
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}
#Override
public void onDateSet(DatePicker view, int dayOfMonth, int monthOfYear,
int year) {
setDateString(dayOfMonth, monthOfYear, year);
dateView.setText(dateString);
}
}
// DialogFragment used to pick a ToDoItem deadline time
public static class TimePickerFragment extends DialogFragment implements
TimePickerDialog.OnTimeSetListener {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return
return new TimePickerDialog(getActivity(), this, hour, minute,
true);
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
setTimeString(hourOfDay, minute, 0);
timeView.setText(timeString);
}
}
private void showDatePickerDialog() {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getFragmentManager(), "datePicker");
}
private void showTimePickerDialog() {
DialogFragment newFragment = new TimePickerFragment();
newFragment.show(getFragmentManager(), "timePicker");
}
private void log(String msg) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(TAG, msg);
}
}

The local variable may not have been initialized

ISSUE:
I have a TimePicker which I'd like to use to save the value of the long/string "minutes" which represents the total number of minutes between the current time and the time selected by the timepicker.
For example: If it is currently 7:30 and the user selects 8:30 it will save 60 minutes as the value of minutes.
I've managed to implement the following source code (shown below) however I'm getting a few errors stating:
"The local variable tp may not have been initialized"
Using the method suggested in the comments below - although I'm following the instructions precisely.
COMPILER PROBLEMS:
Description Resource Path Location Type
The local variable tp may not have been initialized AddEditDevice.java line 119 Java Problem
The local variable tp may not have been initialized AddEditDevice.java line 120 Java Problem
SOURCE:
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.ViewGroup;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.TextView;
import android.widget.TimePicker;
import java.text.DecimalFormat;
import android.util.Log;
import java.util.Calendar;
public class AddEditDevice extends Activity {
private long rowID;
private EditText nameEt;
private EditText capEt;
private EditText codeEt;
private TimePicker timeEt;
private TextView ssidTextView;
Calendar cal = Calendar.getInstance();
TimePicker tp;
// #Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.add_country);
WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo info = wifi.getConnectionInfo();
String ssidString = info.getSSID();
if (ssidString.startsWith("\"") && ssidString.endsWith("\"")){
ssidString = ssidString.substring(1, ssidString.length()-1);
}
//TextView ssidTextView = (TextView) findViewById(R.id.wifiSSID);
ssidTextView = (TextView) findViewById(R.id.wifiSSID);
ssidTextView.setText(ssidString);
nameEt = (EditText) findViewById(R.id.nameEdit);
capEt = (EditText) findViewById(R.id.capEdit);
codeEt = (EditText) findViewById(R.id.codeEdit);
timeEt = (TimePicker) findViewById(R.id.timeEdit);
Bundle extras = getIntent().getExtras();
if (extras != null)
{
rowID = extras.getLong("row_id");
nameEt.setText(extras.getString("name"));
capEt.setText(extras.getString("cap"));
codeEt.setText(extras.getString("code"));
String time = extras.getString("time");
String[] parts = time.split(":");
timeEt.setCurrentHour(Integer.valueOf(parts[0]));
timeEt.setCurrentMinute(Integer.valueOf(parts[1]));
timeEt.setIs24HourView(false);
}
Button saveButton =(Button) findViewById(R.id.saveBtn);
saveButton.setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
if (nameEt.getText().length() != 0)
{
AsyncTask<Object, Object, Object> saveContactTask =
new AsyncTask<Object, Object, Object>()
{
#Override
protected Object doInBackground(Object... params)
{
saveContact();
return null;
}
#Override
protected void onPostExecute(Object result)
{
finish();
}
};
saveContactTask.execute((Object[]) null);
}
else
{
AlertDialog.Builder alert = new AlertDialog.Builder(AddEditDevice.this);
alert.setTitle(R.string.errorTitle);
alert.setMessage(R.string.errorMessage);
alert.setPositiveButton(R.string.errorButton, null);
alert.show();
}
}
});}
public static void main(String[] args) {
Calendar cal = Calendar.getInstance();
TimePicker tp;
cal.set(Calendar.HOUR_OF_DAY, tp.getCurrentHour());
cal.set(Calendar.MINUTE, tp.getCurrentMinute());
long minutes = (cal.getTimeInMillis() -
Calendar.getInstance().getTimeInMillis()) / 1000 / 60;
}
private void saveContact()
{
DatabaseConnector dbConnector = new DatabaseConnector(this);
if (getIntent().getExtras() == null)
{
// Log.i("Test for Null", ""+dbConnector+" "+nameEt+" "+capEt+" "+timeEt+" "+codeEt+" "+ssidTextView);
dbConnector.insertContact(nameEt.getText().toString(),
capEt.getText().toString(),
timeEt.getCurrentHour().toString() + ":"
+ timeEt.getCurrentMinute().toString(),
codeEt.getText().toString(),
ssidTextView.getText().toString());
}
else
{
dbConnector.updateContact(rowID,
nameEt.getText().toString(),
capEt.getText().toString(),
timeEt.getCurrentHour().toString() + ":"
+ timeEt.getCurrentMinute().toString(),
codeEt.getText().toString(),
ssidTextView.getText().toString());
}
}
}

Use java.util.Calendar to get current values and subtract.
Calendar cal = Calendar.getInstance();
TimePicker tp;
// ...
cal.set(Calendar.HOUR_OF_DAY, tp.getCurrentHour());
cal.set(Calendar.MINUTE, tp.getCurrentMinute());
long minutes = (cal.getTimeInMillis() -
Calendar.getInstance().getTimeInMillis()) / 1000 / 60;
Edit: Try this Java console application. A proof that it works.
import java.util.Calendar;
public class Main {
public static void main(String[] args) {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 20);
cal.set(Calendar.MINUTE, 58);
long minutes = (cal.getTimeInMillis() - Calendar.getInstance().getTimeInMillis()) / 1000 / 60;
System.out.println(minutes);
}
}
Returns 4 at 20:54 of my local time.