Getting compile errors, I don't uderstand

Question

I am a very frustrated newbee! I really don't know where to start. I have an app based on the one in the dummies book. Got it working. Then tried to convert it to use the WIMMOne dialogs for time and date. After a bunch of false starts I loaded one of their samples and got it working. I then isolated the code in that and pasted in my sample. I cannot get past errors. (It doesn't help that eclipse constantly adds some of its own. Sometimes I load the source and all statements, including imports, are marked as errors, sometimes I get the R.id,--- in error, I have even had it marked comments as in error.

However, I have cleaned it and reloaded it enough times that I think I am down to a few real errors.

There are a couple basic differences between mine and the sample code: The sample is one big activity java file, mine is in a fragment. Mine had a separate java file for the time dialog. The sample was in the one file, so I coded mine that way. Mine has two menus, a list from which the user goes to a "detail" menu. The sample is all one screen.

There were 2 JAR files from WIMM, I have both in my libs.

To save space I included the first part, where I am getting 3 errors, but will be happy to provide it all if needed.

The first is the sample. It works and even with my commented code, there are no compile errors: Thanks,Clark

    package com.test.medication;


    /**************************
     * Java Imports
     **************************/
    import java.util.Calendar;

    /******************************
     * android imports
     ******************************/
    import android.app.AlarmManager;
    import android.app.Dialog;
    import android.app.PendingIntent;
    import android.content.Context;
    import android.content.Intent;
    import android.net.Uri;
    import android.os.Bundle;
    import android.text.format.Time;
    import android.util.Log;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;

    /******************************
     * Wimm imports
     ******************************/
    import com.wimm.framework.app.LauncherActivity;
    import com.wimm.framework.app.TextInputDialog;
    import com.wimm.framework.app.TimePickerDialog;
    import com.wimm.framework.app.TimePickerDialog.OnTimeSelectedListener;

    public class MedicationsActivity extends LauncherActivity 
    {


        /****************************
         * private globals
         ****************************/
        private TextInputDialog textDialog;
        private TimePickerDialog timeDialog;
        private long msToCount = 0;
        private static String textInput = "please enter pills";
        private EditText timeDisplay;
        private EditText pillsDisplay;
        private long newMs = 0;
        private int Hours;
        private int Minutes;
        private static int hoursToCount = 0;
        private static int minutesToCount = 0;
        private Calendar c ;
        private int mIndex = 0;
        private boolean textEntered = false;

    // get an store the simple name of this class into an String
    private static final String TAG = MedicationsActivity.class.getSimpleName();


     /***********************
     *  define constants
     **********************/
    // define id for both the time dialog, and the enter pills dialog
    static final int TIME_DIALOG_ID = 0;
    static final int PILLS_DIALOG_ID = 1;
    // the actions for the intent definitions posted 
    public static final String ACTION_POST_NOTIFICATION     = "com.test.medication.action.POST";
    public static final String ACTION_UPDATE_NOTIFICATION   = "com.test.medication.action.UPDATE";
    public static final String ACTION_CANCEL_NOTIFICATION   = "com.test.medication.action.CANCEL";

    //delay between views
    private static final int viewDelay      = 5000;  // ms

    @Override
    public void onCreate(Bundle savedInstanceState) 
    {

        //-----------------------------------------------
        // initialize time entry listener
            // pass current state
            super.onCreate(savedInstanceState);

            // open up main layout resource and upload into wimm 
            setContentView(R.layout.main);

            Log.d("MedsMC","S onCrt-1");

            // Subscribe listeners to the buttons and text fields
            Button okButton = (Button)findViewById(R.id.ok);
            Button pillsButton = (Button)findViewById(R.id.enterPills);
            pillsDisplay = (EditText)findViewById(R.id.entryMeds);
            timeDisplay = (EditText)findViewById(R.id.entryTime); 
            Log.d("MedsMC","S onCrt-2L" + timeDisplay);

            // set up the time picker dialog with initial time
            //and subscribe a listener upon the press of ok n the time dialog
            TimePickerDialog myTimerHandler = new TimePickerDialog(this);
            myTimerHandler.setTime(6, 0);
            myTimerHandler.setTimeSelectedListener(timeSetListener);
            Log.d("MedsMC","S onCrt-3myTH" + timeDisplay);

This is my latest with 3 of the errors: the "TimePickerDialog" is used in several places and always has an error.

package com.dummies.android.taskreminder;
import java.text.SimpleDateFormat; 
import java.util.Calendar;  
import java.util.Date;

import android.app.DatePickerDialog.OnDateSetListener;
//import android.app.TimePickerDialog.OnTimeSetListener;
import android.content.ContentUris;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;   //
import android.os.Bundle;  //
import android.os.Handler; 
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.view.LayoutInflater;
import android.view.View;  //
//import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button; //
import android.widget.DatePicker;
import android.widget.EditText;  //
//import android.widget.TimePicker;
import android.widget.Toast;
import android.util.Log;  //
import android.text.format.Time;
import android.app.Dialog; //
import android.content.Context;
import android.content.Intent;

/*******************************************
 * wimm imports
 */

import com.wimm.framework.app.LauncherActivity;
//import com.wimm.framework.app.TextInputDialog;
mport com.wimm.framework.app.TimePickerDialog;
import com.wimm.framework.app.TimePickerDialog.OnTimeSelectedListener;
//import com.wimm.framework.app.DatePickerDialog;
//import com.wimm.framework.app.DatePickerDialog.OnDateSelectedListener;


public class ReminderEditFragment
             extends Fragment
             implements OnDateSetListener,
           //             OnTimeSetListener,
                        LoaderCallbacks<Cursor> 
   {

    private TimePickerDialog timeDialog;
    //private EditText timeDisplay;

    private static int intHours = 0;
    private static int intMinutes = 0;
    private long lngNewMs = 0;
    private Calendar calC ;

    // define constent to be used 
    private static final String DATE_FORMAT = "yyyy-MM-dd";
    private static final String TIME_FORMAT = "kk:mm";

    static final int TIME_DIALOG_ID = 0;
    static final int PILLS_DIALOG_ID = 1;

    public static final String DEFAULT_EDIT_FRAGMENT_TAG = "editFragmentTag"; 
    private EditText mTitleText;

    private EditText mBodyText;
    //private TextInputDialog textDialog;
    //private TextInputDialog mBodyDialog;

    //private TimePickerDialog timeDialog;
    private Button mTimeButton;


    //private Button timeDisplay;

    //private TimePickerDialog mTimeDialog;

    private Button mDateButton;
    private Button mConfirmButton;
    private Calendar mCalendar;

    //OK
    @Override
    public void onSaveInstanceState(Bundle outState)
       {
        super.onSaveInstanceState(outState);
        // save the calendar instance
            outState.putSerializable(CALENDAR, mCalendar);
       }

    private long mRowId;        


    //OK
    @Override
    public void onCreate(Bundle savedInstanceState)
       { 
        //-- house keeping
        super.onCreate(savedInstanceState);
        Log.d("RemindEF","S onCrt");

        if (savedInstanceState != null &&
            savedInstanceState.containsKey(CALENDAR) )
           {
             mCalendar = (Calendar) savedInstanceState.getSerializable(CALENDAR);
             Log.d("RemindEF","Cs onCrt:" + mCalendar);
           }
        else
           {
             mCalendar = Calendar.getInstance();
             Log.d("RemindEF","C onCrt:" + mCalendar);
           }
        Bundle arguments = getArguments(); 

        //-----------------
        //  retrieve row id from list
        if (arguments != null)
           {
            mRowId = arguments.getLong(ReminderProvider.COLUMN_ROWID);
            Log.d("RemindEF","A onCrt:" + mRowId);
               }                

        //-----------------------------------------------
        // initialize time entry listener
    //???????? ERROR: The method setContentView(int) is undefined for the type ReminderEditFragment
           setContentView(R.layout.reminder_edit);

           Log.d("RemindEF","X onCrt");

    //???????ERROR: The method findViewById(int) is undefined for the type ReminderEditFragment
           mTimeButton = (Button)findViewById(R.id.reminder_time); 
           Log.d("MedsMC","S onCrt-2L" + mTimeButton);

    //?????? ERROR: The constructor TimePickerDialog(ReminderEditFragment) is undefined
            TimePickerDialog myTimerHandler = new TimePickerDialog(this);
            myTimerHandler.setTime(6, 0);
            myTimerHandler.setTimeSelectedListener(timeSetListener);
            Log.d("MedsMC","S onCrt-3myTH" + mTimeButton);

Answer 1

1) Don't run your app, when active XML file.
If you did it, clean project and remove generated file

2) Аlways save project Ctrl + Shift + S after adding widgets to layout. After saving will generated an addresses of this widgets and will have no problem with
The method findViewById(int) is undefined for the type ReminderEditFragment

Answer 2

You are copying code that was being used in an Activity and using it in a Fragment.

This will require some modification.

setContentView(R.layout.reminder_edit);

This is used to set the layout. It is called inside onCreate().

mTimeButton = (Button) findViewById(R.id.reminder_time); 

This is used to get a reference to a certain View.

In a Fragment, to set the layout and find views we override onCreateView():

@Override
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
    View v = inflater.inflate(R.layout.reminder_edit, null);
    mTimeButton = (Button) v.findViewById(R.id.reminder_time); 
    return v;
}

TimePickerDialog myTimerHandler = new TimePickerDialog(this);

The argument of the TimePickerDialog constructor is a Context object. In an Activity this would be valid because it would reference the Activity's instance. In a Fragment you should call getActivity() instead.

TimePickerDialog myTimerHandler = new TimePickerDialog(getActivity());

Answer 3

This is mainly an attempt to explain what the compilation errors mean.

---

ERROR: The method setContentView(int) is undefined for the type ReminderEditFragment

You are calling a setContentView method on ReminderEditFragment, but ReminderEditFragment has no such method.

It appears that you are trying to call Activity.setContentView on this. But this is not an Activity ... because of your refactoring.

ERROR: The method findViewById(int) is undefined for the type ReminderEditFragment

Same as above, for a different Activity method.

(I'm not an Android expert, but it seems that you are doing things on a Fragment that you should be doing on an Activity. Perhaps, your Fragment class needs a reference to some Activity instance that it can use for those calls ... ?)

---

ERROR: The constructor TimePickerDialog(ReminderEditFragment) is undefined

The standard TimePickerDialog class has 2 constructors, but neither of them take a single ReminderEditFragment argument. You need to look at the TimePickerDialog javadoc ...