Most of the issues you are having are similar.
I don't see where your variables are defined, they are instantiated
but not defined anywhere.
See http://developer.android.com/guide/tutorials/views/hello-datepicker.html
private int mYear;
private int mMonth;
private int mDay;
static final int DATE_DIALOG_ID = 0;
Hope this helps some.
-Tope
On Mon, Jun 21, 2010 at 9:53 AM, Varun Khanduja <varunkhand...@gmail.com> wrote:
>
> Hi,
>
> I am new to Android development, I have started to learn Java. However
> as a beginner I am facing some issues. Here is the problem, your help
> will be much appreciated. I started learning Java from and use Hello
> android book to teach me some Java coding. Although what I have
> learned from book has worked so far, however I tried to incorporate a
> extra functionality of date-picker to see how I can use the Android
> documentation and apply date picker functionality.
>
> Here are the list of problems I am facing
>
> 1. DATE_DIALOG_ID cannot be resolved.
> 2. mDateDisplay cannot be resolved.
> 3. mDay cannot be resolved
> 4. mMonth cannot be resolved.
> 5. mPickDate cannot be resolved
> 6. Text view cannot be resolved to a type
> 7. R.id.display cannot be resolved.
>
> Please help if your time permits. Thank you very much.
>
>
> package org.example.sudoku;
>
> import android.app.Activity;
> import android.content.Intent;
> import android.os.Bundle;
> import android.view.View;
> import android.view.View.OnClickListener;
> import java.util.Calendar;
> import android.app.DatePickerDialog;
> import android.app.Dialog;
>
> import android.widget.Button;
> import android.widget.DatePicker;
> import android.widget.Toast;
>
>
>
> public class sudoku extends Activity implements OnClickListener {
>
>
>
> /** Called when the activity is first created. */
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.main);
>
> // capture our View elements
> mDateDisplay = (TextView) findViewById(R.id.dateDisplay);
> mPickDate = (Button) findViewById(R.id.pickDate);
>
> // add a click listener to the button
> mPickDate.setOnClickListener(new View.OnClickListener() {
> public void onClick(View v) {
> showDialog(DATE_DIALOG_ID);
> }
> });
>
> // get the current date
> final Calendar c = Calendar.getInstance();
> mYear = c.get(Calendar.YEAR);
> mMonth = c.get(Calendar.MONTH);
> mDay = c.get(Calendar.DAY_OF_MONTH);
>
> // display the current date
> updateDisplay();
>
>
> // Set up click listeners for all the buttons
> View continueButton = findViewById(R.id.continue_button);
> continueButton.setOnClickListener(this);
> View newButton = findViewById(R.id.new_button);
> newButton.setOnClickListener(this);
> View aboutButton = findViewById(R.id.about_button);
> aboutButton.setOnClickListener(this);
> View exitButton = findViewById(R.id.exit_button);
> exitButton.setOnClickListener(this);
>
>
> }
> @Override
> protected Dialog onCreateDialog(int id) {
> switch (id) {
> case DATE_DIALOG_ID:
> return new DatePickerDialog(this,
> mDateSetListener,
> mYear, mMonth, mDay);
> }
> return null;
> }
> // updates the date we display in the TextView
> private void updateDisplay() {
> mDateDisplay.setText(
> new StringBuilder()
> // Month is 0 based so add 1
> .append(mMonth + 1).append("-")
> .append(mDay).append("-")
> .append(mYear).append(" "));
> }
>
> // the callback received when the user "sets" the date in the
> dialog
> private DatePickerDialog.OnDateSetListener mDateSetListener =
> new DatePickerDialog.OnDateSetListener() {
>
> public void onDateSet(DatePicker view, int year,
> int monthOfYear, int dayOfMonth)
> {
> mYear = year;
> mMonth = monthOfYear;
> mDay = dayOfMonth;
> updateDisplay();
> }
> };
>
> // ...
> public void onClick(View v) {
> switch (v.getId()) {
> case R.id.about_button:
> Intent i = new Intent(this, About.class);
> startActivity(i);
> break;
> // More buttons go here (if any) ...
>
>
>
>
>
> }
> }
>
>
> }
>
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