Develop Reference

is accessing number pickers in TimePicker possible?

It seems TimePicker is made of three inner NumberPickers. Is it possible to access them? it's needed to access and modify each of them.
public static class TimePickerFragment extends DialogFragment
implements TimePickerDialog.OnTimeSetListener {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
TimePicker dialog = new TimePicker(getActivity(), this, 22, 30,
DateFormat.is24HourFormat(getActivity()));
// Create a new instance of TimePickerDialog and return it
return dialog;
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// Do something with the time chosen by the user
}
}
In dialog, I've created a TimePicker to be shown, but I have to modify TimePicker minutes column(spinner) and add 15min intervals. I want to know if there is any way to access those NumberPickers alone.
UPDATE
i posted answer below, however it was one of the hardest modification in android built-in components for me, i finally found the answer and shared it here but idk why it got down-vote?

finally i found a solution. i'm getting minute column here and setting a 15 minute interval there.
changeTimepicker(R.id.from_time_picker, 15);
method implementation:
try {
Class<?> rClass = Class.forName("com.android.internal.R$id");
// Field timePicker = rClass.getField(name);
TimePicker mTimePicker = (TimePicker) findViewById(id);
Field m = rClass.getField("minute");
NumberPicker mMinuteSpinner = (NumberPicker) mTimePicker.findViewById(m.getInt(null));
mMinuteSpinner.setMinValue(0);
mMinuteSpinner.setMaxValue((60 / increment) - 1);
List<String> displayedValues = new ArrayList<String>();
for (int i = 0; i < 60; i += increment) {
displayedValues.add(String.format("%02d", i));
}
mMinuteSpinner.setDisplayedValues(displayedValues.toArray(new String[0]));
} catch (Exception e) {
e.printStackTrace();
}
}

Waiting for TimePickerFragment to return time

New to JAVA and Android coding and trying my first practical project.
I don't understand how to make processing wait until timekeeperdialog returns a value.
In my Main Activity I have created getters and setters to variables (first time doing this btw):
private int pickhour;
private int pickminute;
public MainActivity(){
pickhour = 0;
pickminute = 0;
}
public void setpickhour(int pickhour) {
this.pickhour = pickhour;
}
public int getpickhour(){
return this.pickhour;
}
public void setpickminute(int pickminute) {
this.pickminute = pickminute;
}
public int getPickminute(int pickminute) {
return this.pickminute;
}
I call the dialog box with this, and then expecting processing to pause until the TimePicker returns a value, I have a Toast to show results. The Toast fires as soon as the Timepicker appears.
DialogFragment newFragment = new TimePickerFragment();
newFragment.show(getFragmentManager(),"TimePicker");
Toast.makeText(getApplicationContext(), "Time Picker" + String.valueOf(pickhour) + ":" + String.valueOf(pickminute), Toast.LENGTH_LONG).show();
And my fragment looks like this :
public class TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener{
private MainActivity ma = new MainActivity();
#Override
public Dialog onCreateDialog(Bundle savedInstanceState){
//Use the current time as the default values for the time picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
//Create and return a new instance of TimePickerDialog
return new TimePickerDialog(getActivity(),this, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
//onTimeSet() callback method
public void onTimeSet(TimePicker view, int hourOfDay, int minute){
//Do something with the user chosen time
//Get reference of host activity (XML Layout File) TextView widget
ma.setpickhour(hourOfDay);
ma.setpickminute(minute);
}
}
I tried looping through a boolean set by the ontimeset method to force waiting on a return value, but my application just hung.
What fundamental concept am I missing? I'm on vacation, so spent a day & a half trying to figure this out.

You can try this -
public class TimePickerFragment extends DialogFragment implements
TimePickerDialog.OnTimeSetListener{
private MainActivity ma = new MainActivity();
#Override
public Dialog onCreateDialog(Bundle savedInstanceState){
//Use the current time as the default values for the time picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
//Create and return a new instance of TimePickerDialog
return new TimePickerDialog(getActivity(),this, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
//onTimeSet() callback method
public void onTimeSet(TimePicker view, int hourOfDay, int minute){
//Do something with the user chosen time
//Get reference of host activity (XML Layout File) TextView widget
ma.setpickhour(hourOfDay);
ma.setpickminute(minute);
Toast.makeText(getApplicationContext(), "Time Picker" + String.valueOf(pickhour) + ":" + String.valueOf(pickminute), Toast.LENGTH_LONG).show();
}
}
And if you are only using fragment for timePicker there is no need of the fragment.
In this case you can try this in MainActivity -
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
TimePickerDialog mTimePicker;
mTimePicker = new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {
#Override
public void onTimeSet(TimePicker timePicker, int hourOfDay, int minute) {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, hourOfDay);
cal.set(Calendar.MINUTE, minute);
setpickhour(hourOfDay);
setpickminute(minute);
}
}, hour, minute, true);//Yes 24 hour time
mTimePicker.setTitle("Time Picker");
mTimePicker.show();
Does your code work? Because you cannot pass "this" as second argument in TimePickerDialog constructor.

Android DatePickerDialog parameters

I'm creating button dynamically at runtime which their click event opens a datepickerdialog. So like this:
Button btnDate = new Button(this);
btnDate.setText("Date");
btnDate.setTag(new UDAControlItemTag(q.getiQuestionID(),-1,f.getiSectionID(),f.getiGroup(),-1,"Date",""));
btnDate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Button tempBtn = (Button)v;
UDAControlItemTag tempQ = (UDAControlItemTag)tempBtn.getTag();
showDialog(DATE_DIALOG_ID_Question);
//tempBtn.setText(Integer.toString(mTempMonth));
}
});
Then I have the listener where i can get the values and stuff but because I'm creating the controls dynamically, i keep these values of each control in an ArrayList with different properties. The issue I have is how to get the parameters i need to correctly determine which button was clicked in order to put in the correct properties for that question into the ArrayList.
private DatePickerDialog.OnDateSetListener mDateSetListenerQuestion =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
mTempYear = year;
mTempMonth = monthOfYear;
mTempDay = dayOfMonth;
}
};
So in there i have the value of the dialog, but i need to have a QuestionID which is associated to the button that the user clicked, in order to put the value into the ArrayList of all the answers for all that dynamic controls on the activity. I'd really appreciate any ideas, thanks.

Instead of that listener you could use your own class that implements the DatePickerDialog.OnDateSetListener interface and also has a constructor that takes an int, the QuestionID. Something like this:
public class TheSpecialListener implements
DatePickerDialog.OnDateSetListener {
private int id;
public TheSpecialListener(int id) {
this.id = id;
}
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
mTempYear = year;
mTempMonth = monthOfYear;
mTempDay = dayOfMonth;
// id is the QuestionID so you now can identify the Button that started the dialog
}
};
Now when you click a Button you'll update a field with that Button's QuestionID that will be used in the onCreateDialog method(which I don't know how you implemented):
private int questionId;
and in the Button listener:
//...
Button tempBtn = (Button)v;
UDAControlItemTag tempQ = (UDAControlItemTag)tempBtn.getTag();
questionId = //here pass the Button's id or whatever
showDialog(DATE_DIALOG_ID_Question);
and in the onCreateDialog method instantiate the above special listener and pass it the questionId field which will hold the identifier, as it will be updated each time a Button is clicked:
DatePickerDialog spd = new DatePickerDialog(this,
new TheSpecialListener(questionId), 2012, 6, 16);

How to change the content of the layout?

In my Android application i have a tracker activity in which i retrieve the exercises information(name , period , burned calories) from the sqlite data base based on the selected date and display these information in a linear layout , and my problem that as the user select new date the retrieved data are displayed in another "new " layout appear above the old one but what actually i want to do is to display the new retrieved data on the same layout " change the layout content with the new retrieved data ", i have tried the remove all views method but it didn't work since the data appear for few minutes then dis appear
How i can do this: when the user select a new date the new retrieved data displayed on the same layout " refresh the old data by the new one " not to display them in anew layout . how i can do that ? please help me..
java code
public class Tracker extends BaseActivity
{
private Button date_btn;
private ImageButton left_btn;
private ImageButton right_btn;
private ImageView nodata;
private TextView ex_name;
private TextView ex_BCals;
private LinearLayout excercises_LL;
private LinearLayout content_LL ;
private LinearLayout notes;
private LinearLayout details;
private int year,month,day;
private double tot_excals_burned;
private Calendar localCalendar;
private static final int DATE_DIALOG_ID=0;
private boolean has_ex_details;
private boolean has_meal_details=false;
private Cursor exercises_cursor;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.tracker);
date_btn=(Button)findViewById(R.id.btn_date);
date_btn.setText(FormatDate());
date_btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
localCalendar = Calendar.getInstance();
year = localCalendar.get(1);
month= localCalendar.get(2);
day = localCalendar.get(5);
showDialog(DATE_DIALOG_ID);
}
});
left_btn=(ImageButton)findViewById(R.id.btn_left);
left_btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
localCalendar.add(5, -1);
date_btn.setText(FormatDate(localCalendar,"EEEE, d/MMM/yyyy"));
RefreshExercisesData();
RefreshNoDataImage();
}
});
right_btn=(ImageButton)findViewById(R.id.btn_right) ;
right_btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
localCalendar.add(5, 1);
date_btn.setText(FormatDate(localCalendar,"EEEE, d/MMM/yyyy"));
RefreshExercisesData();
RefreshNoDataImage();
}
});
details=(LinearLayout)findViewById(R.id.ll_details);
notes=(LinearLayout)findViewById(R.id.ll_notes);
excercises_LL=(LinearLayout)findViewById(R.id.ll_exercises);
nodata=(ImageView)findViewById(R.id.nodata_imgV);
RefreshExercisesData();
RefreshNoDataImage();
}
private String FormatDate()
{
localCalendar = Calendar.getInstance();
return new SimpleDateFormat("EEEE, d/MMM/yyyy").format(localCalendar.getTime());
}
private String FormatDate(int year, int month, int day)
{
localCalendar = Calendar.getInstance();
localCalendar.set(year, month, day);
return new SimpleDateFormat("EEEE, d/MMM/yyyy").format(localCalendar.getTime());
}
private String FormatDate(Calendar calendar , String format)
{
return new SimpleDateFormat(format).format(calendar.getTime());
}
private void RefreshExercisesData()
{
tot_excals_burned=0;
DBAdapter db = new DBAdapter(this);
db.open();
String selected_date= date_btn.getText().toString();
Log.e("date", selected_date);
exercises_cursor = db.getExerciseInfo(selected_date);
if(exercises_cursor.getCount() !=0 )
{
has_ex_details=true;
details.setVisibility(0);
nodata.setVisibility(8);
notes.setVisibility(0);
//excercises_LL.removeAllViews();
excercises_LL.setWeightSum(1.0F);
excercises_LL.setVisibility(0);
excercises_LL.setOrientation(LinearLayout.VERTICAL);
LayoutInflater exc_LayoutInflater = (LayoutInflater)getApplicationContext().getSystemService("layout_inflater");
LinearLayout layout = (LinearLayout)exc_LayoutInflater.inflate(R.layout.tracker_header_item,null);
TextView tot_ex_cals_value=((TextView)(layout).findViewById(R.id.tv_tot_cals_value));
TextView exs_title=((TextView)(layout).findViewById(R.id.tv_item_title)) ;
exs_title.setText("Exercises ");
(layout).setPadding(0, 36, 0, 0);
excercises_LL.addView((View)layout, 0);
int i = 1;
if (exercises_cursor.moveToFirst())
{
do
{
content_LL=new LinearLayout(this);
ex_name=new TextView(this);
ex_name.setText( exercises_cursor.getFloat(1)+"," +exercises_cursor.getString(0) + "min ");
ex_name.setTextColor(R.color.black);
content_LL.addView(ex_name,0);
ex_BCals=new TextView(this);
ex_BCals.setText(Round(exercises_cursor.getFloat(2)) +" ");
ex_BCals.setTextColor(R.color.color_black);
content_LL.addView(ex_BCals,1);
tot_excals_burned = tot_excals_burned+exercises_cursor.getFloat(2);
excercises_LL.addView(content_LL, i);
i++;
}
while (exercises_cursor.moveToNext());
}
tot_ex_cals_value.setText(Round(tot_excals_burned) );
}
else if(exercises_cursor.getCount()==0 ||tot_excals_burned==0)
{
has_ex_details=false;
RefreshNoDataImage();
}
exercises_cursor.close();
exercises_cursor.deactivate();
db.close();
}
private void RefreshNoDataImage()
{
if(has_ex_details==false && has_meal_details==false)
{
notes.setVisibility(8);
excercises_LL.setVisibility(8);
nodata.setImageResource(R.drawable.bg_nodata);
nodata.setVisibility(View.VISIBLE);
}
else
nodata.setVisibility(8);
}
protected Dialog onCreateDialog(int id)
{
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this, mDateSetListener, this.year, this.month, this.day);
}
return null;
}
private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener()
{
public void onDateSet(DatePicker paramDatePicker, int year, int monthofYear, int dayofMonth)
{
Tracker.this.year=year;
month=monthofYear;
day=dayofMonth;
date_btn.setText(FormatDate(year,month,day));
RefreshExercisesData();
RefreshNoDataImage();
}
};
private String Round(double num) {
return String.format("%.1f%n", num);
}}

Looks like you need to edit your question, if you want us to see any code samples.
If this is only a few texts for an exercise, it should be sufficient to give those views ids in the layout xml, so they can be referenced in your activity.
Then you can just get your views with findViewById in OnCreate, and when you receive data for the new exercise, you update those views with e.g. TextView.setText().

If you have a layout, for example one like this:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/name_textview"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/calories_burned_textview"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</RelativeLayout>
Then in your Activity where you have access to your data from your sqlite db, you can modify the existing textviews within this layout by finding the view and using the setText method.
// load new data occurs above, now want to set
TextView name = (TextView)findViewById(R.id.name_textview);
name.setText(newName);
TextView calsBurned = (TextView)findViewById(R.id.calories_burned_textview);
calsBurned.setText(newCalsBurned);
It's possible, from what it sounds like in your description, that you are adding these textviews to the Activity via code each time some load button is clicked. You can do this, just hold on to the reference to these textviews you added and use setText() later on when you load a new entry (but don't create the textviews a second time).

setText not displaying the value to a TextView

Let me preface that I'm new to programming for Android. I've been doing my due diligence to research to no avail. I have the source code below and I'm having issues with returning the value for returning.
I have the code laid out on eclipse and it's not triggering any errors. But when I build the code below, it comes back with an error. After inspecting the values in debug view, I can see the proper values just not binded to the TextView.
public class MyFirstActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
calculateResult(2012, 9, 29);
}
private void calculateResult(int year, int month, int day) {
long days = 0L;
int returning = 0;
java.util.Calendar cal = new java.util.GregorianCalendar(year, month-1, day);
long todayMI = new java.util.Date().getTime();
long calMI = cal.getTimeInMillis();
long millDiff = calMI - todayMI;
if (millDiff < 0) {
returning = 0;
} else {
days = millDiff / 1000 / 60 / 60;
returning = (int) Math.ceil(days / 24f);
}
TextView days_int_remaining = (TextView) findViewById(R.id.days_int_remaining);
days_int_remaining.setText(returning);
}
}
If it helps, here's the TextView on my layout XML:
<TextView
android:id="#+id/days_int_remaining"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:shadowColor="#5000"
android:shadowDx="4"
android:shadowDy="3"
android:shadowRadius="1"
android:textColor="#fff"
android:textSize="70dip"
android:textStyle="bold"
/>
It may be something simple that I'm missing. Anything to help me further understand the code is appreciated!

I believe that the error you get is "runtime-error - close application".
If you look at method setText(...) that is overloaded you will see that it takes arguments with CharSequence (this is probably what you want) and int resId (this is what you provide).
resId - will seek if there is an resource in /values/strings.xml with given name attribute.
The resolution is to provide String:
days_int_remaining.setText(String.valueOf(returning));

just use
TextView days_int_remaining = (TextView) findViewById(R.id.days_int_remaining);
days_int_remaining.setText(String.valueOf(returning));
instead of
TextView days_int_remaining = (TextView) findViewById(R.id.days_int_remaining);
days_int_remaining.setText(returning);

Turn your returning int into a string.

Try this code :
Basically you have to convert your int value to a string before calling setText();
public class MyFirstActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView days_int_remaining = (TextView) findViewById(R.id.days_int_remaining);
int resultat = calculateResult(2012, 9, 29);
days_int_remaining.setText(Integer.toString(resultat));
}
private int calculateResult(int year, int month, int day) {
long days = 0L;
int returning = 0;
java.util.Calendar cal = new java.util.GregorianCalendar(year, month-1, day);
long todayMI = new java.util.Date().getTime();
long calMI = cal.getTimeInMillis();
long millDiff = calMI - todayMI;
if (millDiff < 0) {
returning = 0;
} else {
days = millDiff / 1000 / 60 / 60;
returning = (int) Math.ceil(days / 24f);
}
return returning;
}
}