覆盖 getText 的 EditText

Question

我想覆盖 EditText 的 getText()。

我收到这种字符串："12,345,678"

我的目的是只删除逗号和 return Editable 但是当我的代码出现错误时。

public class AmountEditText extends EditText {
    @Override
    public Editable getText() {
        Editable s = super.getText();
        if(s!=null && s.length()>0) {
            if (s.toString().contains(",")) {
                return new SpannableStringBuilder(s.toString().replace(",", ""));
            }
        }
        return s;
    }
    private TextWatcher watcher = 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) {
            int position = getSelectionStart();
            int nbCommaBefore;
            int nbCommaAfter;
            String str = s.toString();
            String finalStr;
            String formattedStr;
            nbCommaBefore  = str.length() - str.replace(",", "").length();
            boolean containsDot = false;
            if (str.contains(".")) {
                containsDot = true;
                formattedStr = str.split("\.")[0];

            } else {
                formattedStr = str;
            }
            if (!s.toString().isEmpty()) {
                removeTextChangedListener(watcher);
                formattedStr = formattedStr.replace(",", "");
                formattedStr = formattedStr.replaceAll("(\d)(?=(\d{3})+$)", ",");
                if (containsDot) {
                    if (str.split("\.").length != 1) {
                        finalStr = formattedStr + "." + str.split("\.")[1].replace(",", "");
                    } else {
                        finalStr = formattedStr + ".";
                    }
                } else {
                    finalStr = formattedStr;
                }
                nbCommaAfter  = finalStr.length() - finalStr.replace(",", "").length();
                setText(finalStr);
                if (position == str.length()){
                    setSelection(finalStr.length());
                }
                else if (position == 0)
                {
                    setSelection(0);
                }
                else if (nbCommaBefore < nbCommaAfter){
                    setSelection(position + 1);
                }

                else if (nbCommaAfter < nbCommaBefore){
                    setSelection(position - 1);
                }
                else{
                    setSelection(position);
                }
                addTextChangedListener(watcher);
            }
        }

        @Override
        public void afterTextChanged(Editable s) {
        }

    };

    public AmountEditText(Context context) {
        this(context, null);
    }

    public AmountEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        addTextChangedListener(watcher);
    }

    public AmountEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        addTextChangedListener(watcher);
    }
}

E/MessageQueue-JNI: Exception in MessageQueue callback: handleReceiveCallback E/MessageQueue-JNI: java.lang.IndexOutOfBoundsException: setSpan (0 ... 5) ends beyond length 4 at android.text.SpannableStringBuilder.checkRange(SpannableStringBuilder.java:1265) at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:684) at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:677) at android.widget.SpellChecker$SpellParser.setRangeSpan(SpellChecker.java:532) at android.widget.SpellChecker$SpellParser.parse(SpellChecker.java:515) at android.widget.SpellChecker.spellCheck(SpellChecker.java:242) at android.widget.Editor.updateSpellCheckSpans(Editor.java:679) at android.widget.Editor.sendOnTextChanged(Editor.java:1249) at android.widget.TextView.sendOnTextChanged(TextView.java:8191) at android.widget.TextView.setText(TextView.java:4483) at android.widget.TextView.setText(TextView.java:4337) at android.widget.EditText.setText(EditText.java:89) at android.widget.TextView.setText(TextView.java:4312) at org.newtonproject.newpay.widgetlib.AmountEditText.onTextChanged(AmountEditText.java:74)

我想明确指出错误不是来自我的 onTextChanged 因为没有 getText() override

一切正常

EDIT ：用户可以输入数字，我会附加一些逗号以格式化数字。但是当我覆盖 getText() 时，我想以这种方式删除这些逗号，我不必每次都过滤 getText() 的 return

Answer 1

试试这个，它会对你有所帮助

editText.addTextChangedListener(new TextWatcher() {
            boolean isEdiging;

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

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

            public void afterTextChanged(Editable s) {
                if (isEdiging) return;
                isEdiging = true;
                String str = s.toString().replaceAll("[^\d]", "");
                double s1 = 0;
                try {
                    s1 = Double.parseDouble(str);
                } catch (NumberFormatException e) {
                    e.printStackTrace();
                }
                NumberFormat nf2 = NumberFormat.getInstance(Locale.ENGLISH);
                ((DecimalFormat) nf2).applyPattern("###,###.###");
                s.replace(0, s.length(), nf2.format(s1));

                if (s.toString().equals("0")) {
                    editText.setText("");
                }
                isEdiging = false;
            }
        });

Answer 2

好的，我调试了一下，发现问题出在那一行

if (position == str.length()){
    setSelection(finalStr.length());
}

lenght() 超出集合选择范围，因为它基于 0

只需更改您的代码即可正常工作

if (position == str.length()){
   setSelection(finalStr.length() - 1);
}

如果需要，这里有完整的代码（我使用的是 AppCompatEditText，但它是一样的）：

public class AmountEditText extends android.support.v7.widget.AppCompatEditText {
    @Override
    public Editable getText() {
        Editable s = super.getText();
        if(s!=null && s.length()>0) {
            if (s.toString().contains(",")) {
                return new SpannableStringBuilder(s.toString().replace(",", ""));
            }
        }
        return s;
    }
    private TextWatcher watcher = 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) {
            int position = getSelectionStart();
            int nbCommaBefore;
            int nbCommaAfter;
            String str = s.toString();
            String finalStr;
            String formattedStr;
            nbCommaBefore  = str.length() - str.replace(",", "").length();
            boolean containsDot = false;
            if (str.contains(".")) {
                containsDot = true;
                formattedStr = str.split("\.")[0];

            } else {
                formattedStr = str;
            }
            if (!s.toString().isEmpty()) {
                removeTextChangedListener(watcher);
                formattedStr = formattedStr.replace(",", "");
                formattedStr = formattedStr.replaceAll("(\d)(?=(\d{3})+$)", ",");
                if (containsDot) {
                    if (str.split("\.").length != 1) {
                        finalStr = formattedStr + "." + str.split("\.")[1].replace(",", "");
                    } else {
                        finalStr = formattedStr + ".";
                    }
                } else {
                    finalStr = formattedStr;
                }
                nbCommaAfter  = finalStr.length() - finalStr.replace(",", "").length();
                setText(finalStr);
                if (position == str.length()){
                    setSelection(finalStr.length() - 1);
                }
                else if (position == 0)
                {
                    setSelection(0);
                }
                else if (nbCommaBefore < nbCommaAfter){
                    setSelection(position + 1);
                }

                else if (nbCommaAfter < nbCommaBefore){
                    setSelection(position - 1);
                }
                else{
                    setSelection(position);
                }
                addTextChangedListener(watcher);
            }
        }

        @Override
        public void afterTextChanged(Editable s) {
        }

    };

    public AmountEditText(Context context) {
        this(context, null);
    }

    public AmountEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        addTextChangedListener(watcher);
    }

    public AmountEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        addTextChangedListener(watcher);
    }
}

如果有帮助请告诉我！

Answer 3

在您的情况下，您不能同时覆盖 getText() 和调整大小并使用 TextWatcher。

查看下面的 android 源代码，您就会知道为什么

SpannableStringBuilder.java

public void setSpan(Object what, int start, int end, int flags) {
    setSpan(true, what, start, end, flags, true/*enforceParagraph*/);
}

private void setSpan(boolean send, Object what, int start, int end, int flags,
            boolean enforceParagraph) {
    checkRange("setSpan", start, end);
}

private void checkRange(final String operation, int start, int end) {
    ...
    int len = length();
    if (start > len || end > len) {
        throw new IndexOutOfBoundsException(operation + " " +
                    region(start, end) + " ends beyond length " + len); // here is you exception
    }
}

public int length() {
    return mText.length - mGapLength;
}

SpellChecker.java

private void setRangeSpan(Editable editable, int start, int end) {
    ...
    editable.setSpan(mRange, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}

public void parse(int start, int end) {
    ...
    if (parseEnd > start) {
        setRangeSpan((Editable) mTextView.getText(), start, parseEnd); // I think the error happened from here, they use your getText() function here and receive shorter string, but the start, parseEnd still stick with original string
        parse();
    }
}

解决方案 .
您可以简单地定义一个新函数，例如 getBeautifulText()。

Answer 4

根据您问题的要求：

The user can enter number, I will append some commas in order to format the number. But when I override getText() I want to delete these commas

我相信您可以使用涉及 DecimalFormat:

的更简单的解决方案

class Formatter {
    private final DecimalFormat f = new DecimalFormat(",###");
    private final DecimalFormat o = new DecimalFormat("#");

    String withCommas(String in) {
        try {
            return withCommas(Long.parseLong(in));
        } catch (NumberFormatException e) {
            e.printStackTrace();
            return withCommas(Long.MIN_VALUE);
        }
    }

    String withCommas(long in) {
        return f.format(in);
    }

    Number stripCommas(String in) {
        try {
            return f.parse(in);
        } catch (ParseException e) {
            return Long.MIN_VALUE;
        }
    }

    String stripCommasAsString(String in) {
        return o.format(stripCommas(in));
    }
}

给出：

final long num = 12345678L;
final Formatter f = new Formatter();

assertEquals("12,345,678", f.withCommas("12345678"));
assertEquals("12,345,678", f.withCommas(num));
assertEquals(num, f.stripCommas("12,345,678");
assertEquals("12345678", f.stripCommasAsString("12,345,678"));

覆盖 getText 的 EditText

Override getText's EditText

android

android-edittext

spannablestring