android - tarjetas - se puede sobreescribir una tarjeta nfc

Formato personalizado edite el ingreso de texto android para aceptar el número de tarjeta de crédito

Question

Cómo hacer que el texto editado acepte entradas en formato.

4digitnumber-4dignumber-4dignumber-4dignumber   

El código

text.addTextChangedListener(new TextWatcher() {
    int len = 0;
    String string ;
    @Override

    public void afterTextChanged(Editable s) {

        text.setOnKeyListener(new OnKeyListener()
        {   public boolean onKey(View v, int keyCode, KeyEvent event)
            {              
                    if (keyCode == KeyEvent.KEYCODE_DEL)
                    {

                    }
                    else{

                        string = text.getText().toString();
                        len = string.length()+1;
                        if(len%5==0){text.append("-");}

             }

                return false;      }   });
    }
});

Funciona bien al agregar, pero eliminar o editar causa problemas.

Answer 1

Aquí hay una expresión regular de formato utilizada para mostrar los detalles de la tarjeta en formato XXXX XXXX XXXX XXXX

etCreditCardNumber.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) {
                etCreditCardNumber.setFloatingLabel(MaterialEditText.FLOATING_LABEL_HIGHLIGHT);

                String initial = s.toString();
                // remove all non-digits characters
                String processed = initial.replaceAll("//D", "");

                // insert a space after all groups of 4 digits that are followed by another digit
                processed = processed.replaceAll("(//d{4})(?=//d)(?=//d)(?=//d)", "$1 ");

                //Remove the listener
                etCreditCardNumber.removeTextChangedListener(this);

                int index = etCreditCardNumber.getSelectionEnd();

                if (index == 5 || index == 10 || index == 15)
                    if (count > before)
                        index++;
                    else
                        index--;

                //Assign processed text
                etCreditCardNumber.setText(processed);

                try {
                    etCreditCardNumber.setSelection(index);
                } catch (Exception e) {
                    e.printStackTrace();
                    etCreditCardNumber.setSelection(s.length() - 1);
                }
                //Give back the listener
                etCreditCardNumber.addTextChangedListener(this);
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

Answer 2

En mi caso, el código está funcionando bien.

editTextCreditCard.addTextChangedListener(new FourDigitCardFormatWatcher());

Agregar clase personalizada para TextWatcher .

public class FourDigitCardFormatWatcher implements TextWatcher {

        private static final char space = '' '';

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        }

        @Override
        public void afterTextChanged(Editable s) {
            if (s.length() > 0 && (s.length() % 5) == 0) {
                final char c = s.charAt(s.length() - 1);
                if (space == c) {
                    s.delete(s.length() - 1, s.length());
                }
            }
            if (s.length() > 0 && (s.length() % 5) == 0) {
                char c = s.charAt(s.length() - 1);
                if (Character.isDigit(c) && TextUtils.split(s.toString(), String.valueOf(space)).length <= 3) {
                    s.insert(s.length() - 1, String.valueOf(space));
                }
            }
        }
    }

Espero que esto te ayude.

Answer 3

Esto está funcionando:

public class EditTextSample extends Activity {
    // This regexp has to be improved, it does not detect case where you have
    // more than 4 digits in a middle group like: 1234-12345-123
    static final Pattern CODE_PATTERN = Pattern.compile("([0-9]{0,4})|([0-9]{4}-)+|([0-9]{4}-[0-9]{0,4})+");

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.edit_text_sample);

        final EditText editText = (EditText) findViewById(R.id.input);
        editText.addTextChangedListener(new TextWatcher() {

            @Override
            public void afterTextChanged(Editable s) {
                Log.w("", "input" + s.toString());

                if (s.length() > 0 && !CODE_PATTERN.matcher(s).matches()) {
                    String input = s.toString();
                    String numbersOnly = keepNumbersOnly(input);
                    String code = formatNumbersAsCode(numbersOnly);

                    Log.w("", "numbersOnly" + numbersOnly);
                    Log.w("", "code" + code);

                    editText.removeTextChangedListener(this);
                    editText.setText(code);
                    // You could also remember the previous position of the cursor
                    editText.setSelection(code.length());
                    editText.addTextChangedListener(this);
                }
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

            private String keepNumbersOnly(CharSequence s) {
                return s.toString().replaceAll("[^0-9]", ""); // Should of course be more robust
            }

            private String formatNumbersAsCode(CharSequence s) {
                int groupDigits = 0;
                String tmp = "";
                for (int i = 0; i < s.length(); ++i) {
                    tmp += s.charAt(i);
                    ++groupDigits;
                    if (groupDigits == 4) {
                        tmp += "-";
                        groupDigits = 0;
                    }
                }
                return tmp;
            }
        });
    }
}

Answer 4

Funciona en todos los casos, cuando inserta o elimina un carácter, el formato siempre será correcto. Asegúrate de establecer

android:inputType="number"

/

myEditText.addTextChangedListener(new TextWatcher() {
        private final String space = "-"; // you can change this to whatever you want
        private final Pattern pattern = Pattern.compile("^(//d{4}"+space+"{1}){0,3}//d{1,4}$"); // check whether we need to modify or not
        @Override
        public void onTextChanged(CharSequence s, int st, int be, int count) {
            String currentText = myEditText.getText().toString();
            if (currentText.isEmpty() || pattern.matcher(currentText).matches())
                return; // no need to modify
            String numbersOnly = currentText.trim().replaceAll("[^//d.]", "");; // remove everything but numbers
            String formatted = "";
            for(int i = 0; i < numbersOnly.length(); i += 4)
                if (i + 4 < numbersOnly.length())
                    formatted += numbersOnly.substring(i,i+4)+space;
                else
                    formatted += numbersOnly.substring(i);
            myEditText.setText(formatted);
            myEditText.setSelection(myEditText.getText().toString().length());
        }
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

        @Override
        public void afterTextChanged(Editable e) {}
});

Answer 5

Me parece que las respuestas presentadas aquí no funcionan correctamente con eliminar, eliminar de las operaciones centrales, etc. Aquí está mi código. No restringe la longitud de la entrada, pero parece estar bien con varias inserciones y eliminaciones:

import android.text.Editable;
import android.text.TextWatcher;
import android.view.KeyEvent;
import android.view.View;
import android.widget.EditText;

public class HyphenDelimitTextWatcher implements TextWatcher {
    EditText mEditText;
    boolean mInside = false;
    boolean mWannaDeleteHyphen = false;
    boolean mKeyListenerSet = false;
    final static String MARKER = "|"; // filtered in layout not to be in the string

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        if(!mKeyListenerSet) {
            mEditText.setOnKeyListener(new View.OnKeyListener() {
                @Override
                public boolean onKey(View v, int keyCode, KeyEvent event) {
                    try {
                        mWannaDeleteHyphen = (keyCode == KeyEvent.KEYCODE_DEL
                                && mEditText.getSelectionEnd() - mEditText.getSelectionStart() <= 1
                                && mEditText.getSelectionStart() > 0
                                && mEditText.getText().toString().charAt(mEditText.getSelectionEnd() - 1) == ''-'');
                    } catch (IndexOutOfBoundsException e) {
                        // never to happen because of checks
                    }
                    return false;
                }
            });
            mKeyListenerSet = true;
        }
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        if (mInside) // to avoid recursive calls
            return;
        mInside = true;

        int currentPos = mEditText.getSelectionStart();
        String string = mEditText.getText().toString().toUpperCase();
        String newString = makePrettyString(string);

        mEditText.setText(newString);
        try {
            mEditText.setSelection(getCursorPos(string, newString, currentPos, mWannaDeleteHyphen));
        } catch (IndexOutOfBoundsException e) {
            mEditText.setSelection(mEditText.length()); // last resort never to happen
        }

        mWannaDeleteHyphen = false;
        mInside = false;
    }

    @Override
    public void afterTextChanged(Editable s) {
    }

    private String makePrettyString(String string) {
        String number = string.replaceAll("-", "");
        boolean isEndHyphen = string.endsWith("-") && (number.length()%4 == 0);
        return number.replaceAll("(.{4}(?!$))", "$1-") + (isEndHyphen ?"-":"");
    }

    private int getCursorPos(String oldString, String newString, int oldPos, boolean isDeleteHyphen) {
        int cursorPos = newString.length();
        if(oldPos != oldString.length()) {
            String stringWithMarker = oldString.substring(0, oldPos) + MARKER + oldString.substring(oldPos);

            cursorPos = (makePrettyString(stringWithMarker)).indexOf(MARKER);
            if(isDeleteHyphen)
                cursorPos -= 1;
        }
        return cursorPos;
    }

    public HyphenDelimitTextWatcher(EditText editText) {
        mEditText = editText;
    }
}

Uso:

    mSomeEditText.addTextChangedListener(new HyphenDelimitTextWatcher(mSomeEditText));

Answer 6

Si solo desea agrupar visualmente los números, pero no desea alterar el valor de los guiones agregados de EditText , puede utilizar este enfoque de EditText :

EditText editText = findViewById(R.id.editText);
editText.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 editable) {
        Object[] paddingSpans = editable.getSpans(0, editable.length(), DashSpan.class);
        for (Object span : paddingSpans) {
            editable.removeSpan(span);
        }

        addSpans(editable);
    }

    private static final int GROUP_SIZE = 4;

    private void addSpans(Editable editable) {

        final int length = editable.length();
        for (int i = 1; i * (GROUP_SIZE) < length; i++) {
            int index = i * GROUP_SIZE;
            editable.setSpan(new DashSpan(), index - 1, index,
                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
    }
});

donde la clase DashSpan ve así:

/**
 * A {@link ReplacementSpan} used for spacing in {@link android.widget.EditText}
 * to space things out. Adds ''-''s
 */
public class DashSpan extends ReplacementSpan {

    @Override
    public int getSize(@NonNull Paint paint, CharSequence text, int start, int end, FontMetricsInt fm) {
        float padding = paint.measureText("-", 0, 1);
        float textSize = paint.measureText(text, start, end);
        return (int) (padding + textSize);
    }

    @Override
    public void draw(@NonNull Canvas canvas, CharSequence text, int start, int end, float x, int top, int y,
                     int bottom, @NonNull Paint paint) {
        canvas.drawText(text.subSequence(start, end) + "-", x, y, paint);
    }
}

De esta manera tendrá la agrupación visual usando los guiones, pero el getText() devolverá el texto sin ninguna agrupación.

Para forzar solo los números, puede agregar los atributos android:digits="0123456789" y android:inputType="number" al EditText .

Esta solución se basa en el código de this biblioteca.

Answer 7

Si no necesita este efecto, puede usar este code en EditText

Answer 8

Ahora esto funciona bien para el teclado blando / duro para todas las operaciones de borrado / edición. tx 4 ur ayuda ..

package com.and;

import android.app.Activity;
import android.app.AlertDialog;
import android.inputmethodservice.KeyboardView;
import android.os.Bundle;
import android.telephony.PhoneNumberFormattingTextWatcher;
import android.text.Editable;
import android.text.Selection;
import android.text.Spannable;
import android.text.TextWatcher;
import android.text.format.Formatter;
import android.text.method.NumberKeyListener;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.EditText;
import android.widget.Toast;

public class ccformat extends Activity {

    String a;
    int keyDel;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        final EditText text = (EditText) findViewById(com.and.R.id.editText1);

        text.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

                boolean flag = true;
                String eachBlock[] = text.getText().toString().split("-");
                for (int i = 0; i < eachBlock.length; i++) {
                    if (eachBlock[i].length() > 4) {
                        flag = false;
                    }
                }
                if (flag) {

                    text.setOnKeyListener(new OnKeyListener() {

                        @Override
                        public boolean onKey(View v, int keyCode, KeyEvent event) {

                            if (keyCode == KeyEvent.KEYCODE_DEL)
                                keyDel = 1;
                            return false;
                        }
                    });

                    if (keyDel == 0) {

                        if (((text.getText().length() + 1) % 5) == 0) {

                            if (text.getText().toString().split("-").length <= 3) {
                                text.setText(text.getText() + "-");
                                text.setSelection(text.getText().length());
                            }
                        }
                        a = text.getText().toString();
                    } else {
                        a = text.getText().toString();
                        keyDel = 0;
                    }

                } else {
                    text.setText(a);
                }

            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
                // TODO Auto-generated method stub

            }

            @Override
            public void afterTextChanged(Editable s) {
            }
        });
    }
}