Develop Reference

Move focus to next EditText in an array

I have an activity in which I get from the user credit card's serial number.
It contains four editTexts - each one for 4 digits.
I've used an array for the editTexts -
EditText[] editSerial = new EditText[4];
and I've restricted the input's length in each editText with
android:maxLength="4"
I want the focus to move to the next editText once the user have entered 4 digits in the current one.
I've seen this answer - How to automatically move to the next edit text in android:
et1.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start,int before, int count)
{
// TODO Auto-generated method stub
if(et1.getText().toString().length()==size) //size as per your requirement
{
et2.requestFocus();
}
}
Is there any BETTER solution than repeat this code 3 times?

Kind of. You need a TextWatcher on each one but you can extract it as a proper class so that you can pass in parameters indicating the View to focus on next.
Then it'll be like
et1.addTextChangedListener(new FocusSwitchingTextWatcher(et2));
et2.addTextChangedListener(new FocusSwitchingTextWatcher(et3));
et3.addTextChangedListener(new FocusSwitchingTextWatcher(et4));
The class:
private static class FocusSwitchingTextWatcher implements TextWatcher {
private final View nextViewToFocus;
TextWatcher(View nextViewToFocus) {
this.nextViewToFocus = nextViewToFocus;
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (s.length > size) {
nextViewToFocus.requestFocus();
}
}
... // the other textwatcher methods
}

Editext validation android

In Edittext Android :
How to implement this feature if user entered any valid numeric value it should get displayed in the form of decimal value.
e.g If user enters 4 then it should get displayed as 4.000 instead of only 4.
Also can be done using DONE button click handler of virtual keypad.

You can use like this
EditText et = (EditText)findViewById(R.id.myEditText);
et.addTextChangedListener(new TextWatcher(){
public void afterTextChanged(Editable s) {}
public void beforeTextChanged(CharSequence s, int start, int count, int after){}
public void onTextChanged(CharSequence s, int start, int before, int count){
//Check your et value and set it back.
// Retrieve 4.. set it to 4.000
}
});

Have you tried this on your XML?
android:inputType="numberDecimal"

Parse the string you are getting from editext to double or float in the click of a done button or wherever you want.

implement TextWatcher on multiple edittext fields

I have this application in which I create multiple EditTexts dynamically. The amount depends on user input. I am trying to allow the focus to change to the next edittext after two characters have been entered. I have this so far:
for(EditText editText : editTextList ) {
editText.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable s) {
if(s.toString().length() == 2) {
//code to change focus to next edit text goes here
}
}
});
}
The first problem is that this could potentially create many instances of TextWatcher if the user enters a large number (average in this context would probably be 100-600 EditText fields).
The second problem is how would I go about changing focus in the afterTextChanged method because I would want to change the focus to the next EditText away from the one that is currently being represented inside the loop.
Should I not be concerned about the potential performance issues of multiple TextWatcher objects? Should I scrap this whole implementation and focus elsewhere? Any suggestions will be greatly appreciated.

As you may have a lot of EditTexts at runtime i would suggest you to use maxlength attribute of EditText in this way you will restrict user to enter only 2 characters.
like this
EditText editText = new EditText(this);
int maxLength = 2;
editText.setFilters(new InputFilter[] {new InputFilter.LengthFilter(maxLength)});
Now add next button in your keyboard like this
yourEditText.setImeOptions(EditorInfo.IME_ACTION_NEXT);
It is the default behavior of next button to change focus to the immediate next view which takes input being in the same parent layout.

Android - EditText saves T9 suggested values

I have an application where user inputs text into EditText field. After user clicks OK (in keyboard input mode), a correct value is in the EditText (lets say "Smile").
if (answers.get(counter).getText().equals(opponentAnswers.get(counter)))
But this if statement fails, because the same EditText has the values that were suggested by T9 option, when user was inputing his answer (for example values of EditText would be "Smile Smiling Smiled"), while it should only have a value "Smile".
Any ideas how to solve this issue?

That's really weird. These are kind of guesses, but this is what I'd try next if I were you:
A. Instead of doing an equals against getText(), try doing a toString on getText(), so:
if (answers.get(counter).getText().toString().equals(opponentAnswers.get(counter)))
B. If that doesn't work then you could try adding a TextWatcher using addTextChangedListener on the EditText, and getting the value from that. Calling toString() on the editable returned in afterTextChanged might give you the value you want.
private class SearchTextWatcher implements 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) {
//Get the text the user sees
String textShownToUser = s.toString();
}
}
Hope this helps! Best of luck!

Android - How can I trigger a validation for an edittext field

I need to implement an edittext field that just allows user input from 20 to 60. If user input a number that is out of range, a dialog will display and force user to input again.
So the text watcher is not useful because it cannot prevent user input a number that lower than 20.
The onFocusChangedListener is neither, if user clicks on 'done' button, the edittext doesn't lost focus, so the trigger doesn't fire as well.
Besides, the edittext is inside a tab view, so when user clicks on another tab, the trigger fires but user cannot input value for that edittext any more.

Alvin is right ... this is my code to do something with text once entered, but could have as easily been a validation sequence:
smsMsgBody_editText.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
// Do something fancy
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
public void afterTextChanged(Editable s) { }
});

How about keeping track of the EditText field with onTextChanged?

use these
android:maxLength="2" android:numeric="integer"
then when you get the number like: number.gettext() you make validations like if number>60 and lower then 20 you can do number.setHint("number no valid");