Develop Reference

Number Picker getting value

I have a number picker set up with strings but I am having a problem with getting the string that is being displayed.
Here is the code for the construction of the number picker.
fractionPicker is my Number picker .
void fractionPickerFunction(){
final String[] arrayString= new String[]{"None", "1/8", "1/4", "3/8", "1/2", "5/8", "3/4", "7/8"};
fractionPicker.setMinValue(0);
fractionPicker.setMaxValue(arrayString.length-1);
fractionPicker.setFormatter(new NumberPicker.Formatter() {
#Override
public String format(int value) {
return arrayString[value];
}
});
}

Set a change listener if you need to just get the result. If you need to modify the variable with the setFormatter still then just use both. call your setFormatter, then also add the change listener. It will then return to you, your modified variable.
Change
void fractionPickerFunction(){
final String[] arrayString= new String[]{"None", "1/8", "1/4", "3/8", "1/2", "5/8", "3/4", "7/8"};
fractionPicker.setMinValue(0);
fractionPicker.setMaxValue(arrayString.length-1);
fractionPicker.setFormatter(new NumberPicker.Formatter() {
#Override
public String format(int value) {
return arrayString[value];
}
});
}
To this:
fractionPicker.setOnValueChangedListener(new OnValueChangeListener() {
#Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
// TODO Auto-generated method stub
String Old = "Old Value : ";
String New = "New Value : ";
}
});

You should refer to the android documentation on the NumberPicker. In short,
you are going to want to set a OnValueChangeListener by calling setOnValueChangedListener on your NumberPicker. You can do that with the following:
fractionPicker.setOnValueChangedListener(new OnValueChangeListener() {
#Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
// Do your work here
// Parameters
// picker NumberPicker: The NumberPicker associated with this listener.
// oldVal int: The previous value.
// newVal int: The new value.
}
});

EditText: Cursor does not update when calling setText() with a custom Editable

I'm experiencing issues trying to use a custom type that implements Editable as the basis for an EditText. Here is my code:
// This is a custom type that implements Editable.
// It's just a wrapper over a SpannableStringBuilder, with some
// irrelevant added functionality.
public class ColoredText implements Editable {
private final SpannableStringBuilder builder;
public ColoredText(String text) {
this.builder = new SpannableStringBuilder(text);
}
// All Editable methods are implemented through this.builder.
#Override
public Editable replace(int i, int i1, CharSequence charSequence, int i2, int i3) {
this.builder.replace(i, i1, charSequence, i2, i3);
return this;
}
...
}
public class NoCopyEditableFactory extends Editable.Factory {
#Override
public Editable newEditable(CharSequence source) {
return (Editable) source;
}
}
// In MainActivity.java
#Override
protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.main);
String line = "EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE";
String text = TextUtils.join("\n", Collections.nCopies(100, line));
Editable e = new ColoredText(text);
EditText et = (EditText) findViewById(R.id.editText);
et.setEditableFactory(new NoCopyEditableFactory()); // This line is causing trouble.
et.setText(e, TextView.BufferType.EDITABLE);
}
// In the MainActivity layout file
<EditText
android:id="#+id/editText"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
For some reason, when I comment out the NoCopyEditableFactory, the cursor updates just fine. However, when I uncomment the line forcing the EditText not to copy the ColoredText into a new SpannableStringBuilder, the cursor does not update when I click on new places in the text. Why is this?

The problem turned out to be with my Editable implementation. It works fine after I deleted some misbehaving code.

How to block user from inputing a specific character on a EditText

I need to block the user from inputing the . (period) character from the keyboard on a number EditText, but I need to be able to use it on the same EditText via the setText method.
I've tried using InputFilter but when I call setText the . character don't show. I've also tried setting the digits parameter in the xml but the setText doesn't work either.
Is there a way to do this?
Here's my InputFilter code:
public static InputFilter blockPeriod(){
return new InputFilter() {
#Override
public CharSequence filter(CharSequence charSequence, int i, int i1, Spanned spanned, int i2, int i3) {
for (int j = i; j <i1 ; j++) {
char c = charSequence.charAt(j);
if (!allowed(c)){
return "";
}
}
return null;
}
private boolean allowed(char c){
return c != '.';
}
};
}

You can do it with your InputFilter, but you need to allow it for a while when you calling setText() method.
private static class AllowableInputFilter implements InputFilter {
private boolean mAllowDot;
public void setAllowDot(boolean toAllow) {
mAllowDot = toAllow;
}
....
private boolean allowed(char c){
return mAllowDot || c != '.';
}
}
public void forceText(String text) {
mInputFilter.setAllowDot(true);
mEditText.setText(text);
mInputFilter.setAllowDot(false);
}
mInputFilter = new AllowableInputFilter();
mInputFilter.setAllowDot(false);
mEditText.setFilters(new InputFilter[] {mInputFilter});
forceText("Okaaayy....");

try this out :
if (textedit.getText().toString().startsWith(".")){
//Do something about it
}
now entering . you can show a message or something else.also put this code under onTextChanged method(text watcher).
Hope it helps you out.

user digits property inside xml in EditText
android:digits="0123456789"
so now edittext only allow digit from 0 to 9

Getting EditableText from EditText in RecyclerView

I've recycler view with 0 items, I've added an option to manually add the items, my stracture is simple :
RV_Item.xml (contains EditText).
MyItem, which is an Object for RV ( contains private String Text; ).
MainActivity.java, where the stuff happen.
// My List<Object>
List<MyItem> Items = new ArrayList<>();
// For Adding, I've added FAB-Button, When Clicked, it does the following :
Items.add(new MyItem());
CheckForEmptyItems();
mAdapter.notifyItemInserted(0);
Now, When the user click the save button, i want to take all the edittext in all the items he had added, i'm doing in the following way :
for(MyItem items : Items){
Log.i("PrintingInfo", items.getText() );
}
The problem is, i'm not getting the text he entered in all EditText fields, and it's returning Null in all of them, What's the issue in this ?

So, i don't know why always i know the answer after posting, but here's how you gonna know what the user typed :
in your Adapter Class, in onBindViewHolder method, add textlistener for the EditText, here's an example :
holder.MyEditText.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
itemList.get(position).setText(s.toString());
}
});
Hope that helps you!

Issue Formatting EditText for Currency

All- I have been struggling with this for a while and have looked at all the other questions about this sort of thing but I just can't figure it out: I have an edttext field that needs to be formatted for currency. I have tried the code in all of the other questions relating to this but no matter what I try it just doesn't work. Here is my code:
EditText text = (EditText)findViewById(R.id.edit_bill);
text.setRawInputType(Configuration.KEYBOARD_12KEY);
text.addTextChangedListener(new TextWatcher(){
EditText text = (EditText)findViewById(R.id.edit_bill);
DecimalFormat dec = new DecimalFormat("0.00");
public void afterTextChanged(Editable arg0) {
}
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
public void onTextChanged(CharSequence s, int start,
int before, int count) {
if(!s.toString().matches("^\\$(\\d{1,3}(\\,\\d{3})*|(\\d+))(\\.\\d{2})?$"))
{
String userInput= ""+s.toString().replaceAll("[^\\d]", "");
if (userInput.length() > 0) {
Float in=Float.parseFloat(userInput);
float percen = in/100;
text.setText("$"+dec.format(percen));
text.setSelection(text.getText().length());
}
}
}
});
This code is inside of an onClick method. Does that make a difference (eg. the text will only be formatted when the user clicks the button)?. Thanks in advance!

I have used this method in the past for formatting money.
static public String customFormat(String pattern, double s ) {
DecimalFormat myFormatter = new DecimalFormat(pattern);
String stringFormatOutput = myFormatter.format(s);
return stringFormatOutput;
}
it can be used like this:
String strPrice = customFormat("$###,##0.00", 300.2568);
mTxt.setText(strPrice);
just change the "300.2568" to be your price. This probably could work just as well for floats instead of doubles.