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How can I modify the input of multiple EditTexts at the same time, as I only modify one?

I have multiple EditTexts and I want to change the input of all of them at the same time, as I modify only one.(all of them take decimal numbers as input)
I stored the EditTexts in an array named 'editTexts'.
Here's what I tried
//Set the listener for each element
for (int i=0; i<editTexts.length; i++) {
final int finalI = i;
editTexts[i].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) {
//if the editText which is currently edited is empty, set the input for all the rest to be '0.0'
if (editTexts[finalI].getText().toString().trim().length() == 0) {
for(EditText e : editTexts) {
if (e == editTexts[finalI])
continue;
e.setText("0.0");
}
} else {
float no = Float.parseFloat(s.toString() + "");
//Set the input of all the other editTexts to be the decimal number entered, multiplied by 2
for(EditText e : editTexts){
if(e == editTexts[finalI])
continue;
e.setText(no*2+"");
}
}
}
#Override
public void afterTextChanged(Editable s) {
}
})
}
In this case the multiplication coefficient is just an example, it's not always gonna be 2. I used it just to test it out.
For some reason, when I change the input value, the app freezes.
Any help? Thanks!

Use LiveData to store your user input values.
Once it's value changes you can set value to each EditText. I think it is an easy way to implement.

Try it like this:
// et_x1, et_x2 and et_x3 are ids of EditTexts
//set inputType for all EditTexts as numberDecimal
EditText editText1 = findViewById(R.id.et_x1);
final EditText editText2 = findViewById(R.id.et_x2);
final EditText editText3 = findViewById(R.id.et_x3);
editText1.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) {
String value = s.toString();
double x;
if (!value.equals("")) {
x = Double.parseDouble(value);
} else {
x = 0.0;
}
editText2.setText(Editable.Factory.getInstance().newEditable((String.valueOf(Math.pow(x, 2)))));
editText3.setText(
Editable.Factory.getInstance().newEditable((String.valueOf(Math.pow(x, 3)))));
}
#Override
public void afterTextChanged(Editable s) {
}
});
Hope it helps you!

How to add 3 decimal places Currency formatting to edittext Using TextWatcher Android

I want to add 3 decimal places currency formatting to EditText using TextWatcher
at the beginning, value is 0.000 and the number should change right to left
eg: if I pressed 1,2,3,4,5 in order value should appear as this 12.345
following code is worked only for 2 decimal places. Please anyone helps me how to change this code for 3 decimal places or another solution
public class CurrencyTextWatcher implements TextWatcher {
boolean mEditing;
Context context;
public CurrencyTextWatcher() {
mEditing = false;
}
public synchronized void afterTextChanged(Editable s) {
if(!mEditing) {
mEditing = true;
String digits = s.toString().replaceAll("\\D", "");
NumberFormat nf = NumberFormat.getCurrencyInstance();
try{
String formatted = nf.format(Double.parseDouble(digits)/100);
s.replace(0, s.length(), formatted);
} catch (NumberFormatException nfe) {
s.clear();
}
mEditing = false;
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
public void onTextChanged(CharSequence s, int start, int before, int count) { }
}

Divide 1000 instead of 100 and also setMinimumFractionDigits for NumberFormat as 3.
public class CurrencyTextWatcher implements TextWatcher {
boolean mEditing;
Context context;
public CurrencyTextWatcher() {
mEditing = false;
}
public synchronized void afterTextChanged(Editable s) {
if(!mEditing) {
mEditing = true;
String digits = s.toString().replaceAll("\\D", "");
NumberFormat nf = NumberFormat.getCurrencyInstance();
nf.setMinimumFractionDigits(3);
try{
String formatted = nf.format(Double.parseDouble(digits)/1000);
s.replace(0, s.length(), formatted);
} catch (NumberFormatException nfe) {
s.clear();
}
mEditing = false;
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
public void onTextChanged(CharSequence s, int start, int before, int count) { }
}

TextWatcher not detecting delete key

I have a TextWatcher that places a percent sign after numbers in an EditText. That part works fine. The problem is if the user makes a mistake and needs to delete the numbers in the editText, the percent sign does not allow any deletions. below is my code:
#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) {
editText.removeTextChangedListener(this);
try {
String originalString = s.toString();
if (originalString.contains("%")) {
originalString = originalString.replaceAll("%", "");
}
String formattedString = originalString + "%";
//setting text after format to EditText
editText.setText(formattedString);
editText.setSelection(editText.getText().length());
} catch (NumberFormatException nfe) {
nfe.printStackTrace();
}
editText.addTextChangedListener(this);
}
I believe I need an OnKeyListener but don't know exactly how to implement it. this is what I did with the OnKeyListener but it doesn't work:
boolean keyDelete
#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) {
if(!keyDelete) {
editText.removeTextChangedListener(this);
try {
String originalString = s.toString();
if (originalString.contains("%")) {
originalString = originalString.replaceAll("%", "");
}
String formattedString = originalString + "%";
//setting text after format to EditText
editText.setText(formattedString);
editText.setSelection(editText.getText().length());
} catch (NumberFormatException nfe) {
nfe.printStackTrace();
}
editText.addTextChangedListener(this);
}
}
#Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DEL){
keyDelete = true;
}else{
keyDelete = false;
}
return false;
}
Any help on this is greatly appreciated..

Your code works fine if a user sets a cursor before '%' symbol. The issue is that after text formatting you set selection to the end of a text.
editText.setSelection(editText.getText().length());
In a case, when a user pushes the delete button without replacing a cursor, he is deleting '%' symbol, but your code returns '%' symbol back each time. This is because feels like:
the percent sign does not allow any deletions
To solve your issue refactor your code to set selections before '%' symbol:
#Override
public void afterTextChanged(Editable s) {
editText.removeTextChangedListener(this);
try {
String originalString = s.toString();
if (originalString.contains("%")) {
originalString = originalString.replaceAll("%", "");
}
String formattedString = originalString + "%";
//setting text after format to EditText
editText.setText(formattedString);
if (formattedString.length() >= 1) {
editText.setSelection(editText.getText().length() - 1);
}
} catch (NumberFormatException nfe) {
nfe.printStackTrace();
}
editText.addTextChangedListener(this);
}

How to check first 2characters of String in Android

In my application, I want to get a phone number from the user and if the first 2 characters of this number are 09, I want to show Toast.
I wrote the code below, but it always shows me the Toast message.
My code:
phoneNumberPage_phoneEdtTxt.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) {
if (s.toString().length() < 11) {
enableDisableBtn(0.3f, false);
} else {
hideKeyboard(activity);
enableDisableBtn(1.0f, true);
}
}
#Override
public void afterTextChanged(Editable s) {
if (s.toString().trim().length()==1){
if (!s.equals("0")){
Toast.makeText(context, "NOOOOOO", Toast.LENGTH_SHORT).show();
}
}
}
});
}
How can I do it? Can you please help me?

using startsWith
if(s.startsWith("09")){
or you can use matches with regex
if(s.matches("09(.*)"))

You should check String reference especially substring method. In your case you can use substring like this:
String twoFirstCharacters = string.substring(0, 2);
if (twoFirstCharacters.equals("09")) {
// here we go
}

Use String.startsWith() method
#Override
public void afterTextChanged(Editable s) {
if (s!=null&& !s.toString().trim().isEmpty()){ // make sure String value is there
if (!s.startsWith("09")){ // check string qualifies your requirement
Toast.makeText(context, "NOOOOOO", Toast.LENGTH_SHORT).show();
}
}
}

How to update an EditText to convert input into currency? (Android Newbie)

I have a number of EditText's with an inputType="numberDecimal" and i'm wanting to change the input into currency (TextWatcher maybe?). Can anyone help with this? 99% of my project is done bar this. Thanks guys.

try below code:-
tv.addTextChangedListener(new TextWatcher()
{
private String current = "";
#Override
public void onTextChanged(CharSequence s, int start, int before, int count)
{
if(!s.toString().equals(current))
{
if(tv.getText().toString().trim().length()>0)
{
tv.removeTextChangedListener(this);
String formated = tv.getText().toString().trim().replace("$", "");
current = formated;
tv.setText("$"+formated);
tv.setSelection(formated.length()+1);
tv.addTextChangedListener(this);
}
}
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after)
{
}
#Override
public void afterTextChanged(final Editable s)
{
}
});