error while trying editText.setSelection

Question

I am trying to apply a mask to my Edittext, but when I try to enter a value beyond what is allowed I get the error:

05-20 17:17:23.943: E/AndroidRuntime(1399): FATAL EXCEPTION: main
05-20 17:17:23.943: E/AndroidRuntime(1399): java.lang.IndexOutOfBoundsException: setSpan (17 ... 17) ends beyond length 13
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.SpannableStringBuilder.checkRange(SpannableStringBuilder.java:934)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:527)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:520)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.widget.SpellChecker$SpellParser.init(SpellChecker.java:308)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.widget.SpellChecker.spellCheck(SpellChecker.java:149)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.widget.TextView.updateSpellCheckSpans(TextView.java:7753)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.widget.TextView.handleTextChanged(TextView.java:7620)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.widget.TextView$ChangeWatcher.onTextChanged(TextView.java:7990)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.SpannableStringBuilder.sendTextChange(SpannableStringBuilder.java:881)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:389)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:266)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:443)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.SpannableStringBuilder.delete(SpannableStringBuilder.java:216)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.SpannableStringBuilder.delete(SpannableStringBuilder.java:29)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.method.BaseKeyListener.backspaceOrForwardDelete(BaseKeyListener.java:90)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.method.BaseKeyListener.backspace(BaseKeyListener.java:45)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.method.BaseKeyListener.onKeyDown(BaseKeyListener.java:151)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.method.QwertyKeyListener.onKeyDown(QwertyKeyListener.java:352)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.text.method.TextKeyListener.onKeyDown(TextKeyListener.java:132)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.widget.TextView.doKeyDown(TextView.java:5386)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.widget.TextView.onKeyDown(TextView.java:5206)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.view.KeyEvent.dispatch(KeyEvent.java:2533)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.view.View.dispatchKeyEvent(View.java:5446)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1859)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1361)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.app.Activity.dispatchKeyEvent(Activity.java:2324)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1806)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.view.ViewRootImpl.deliverKeyEventPostIme(ViewRootImpl.java:3300)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.view.ViewRootImpl.handleFinishedEvent(ViewRootImpl.java:3273)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2436)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.os.Looper.loop(Looper.java:137)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at android.app.ActivityThread.main(ActivityThread.java:4340)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at java.lang.reflect.Method.invokeNative(Native Method)
05

-20 17:17:23.943: E/AndroidRuntime(1399):   at java.lang.reflect.Method.invoke(Method.java:511)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-20 17:17:23.943: E/AndroidRuntime(1399):     at dalvik.system.NativeStart.main(Native Method)

This is my mask class:

package suporte;

import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;

public abstract class Mask {

    public static String unmask(String s) {
    return s.replaceAll("[.]", "").replaceAll("[-]", "")
            .replaceAll("[/]", "").replaceAll("[(]", "")
            .replaceAll("[)]", "");
}

    public static TextWatcher insert(final String mask, final EditText ediTxt, final int length) {
        return new TextWatcher() {
            boolean isUpdating;
            String old = "";

            public void onTextChanged(CharSequence s, int start, int before,
                    int count) {
                String str = Mask.unmask(s.toString());
                String mascara = "";
                if (isUpdating) {
                    old = str;
                    isUpdating = false;
                    return;
                }
                int i = 0;
                for (char m : mask.toCharArray()) {
                    if (m != '#' && str.length() > old.length()) {
                        mascara += m;
                        continue;
                    }
                    try {
                        mascara += str.charAt(i);
                    } catch (Exception e) {
                        break;
                    }
                    i++;
                }
                isUpdating = true;
                ediTxt.setText(mascara);
                ediTxt.setSelection(mascara.length());
            }

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

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

}

When I type 11.111.111/1111-11 and in seguinda + 1, it gives the error. The mask I pass is: ##.####.###/####-##

Debugging, I discovered that the error occurs at some point that the android api will try to use the editText buffer, which I do not know why it gets the size 19 (which in this case is the size of the String inserted in Edittext) but should be 18, because before setSelection I did a new setText.

Answer 1

I think the ideal is for you to actually use a limitation in the field itself and solve this problem.

His field is specific and has a specific mask, so why leave it open for more characters than he really needs? :)

An addendum to this method of applying generic mask, which is very good, is that there is a problem there which is that at the time of erasing the mask goes away, getting pretty ugly.. in phone cases, for example, if you typed an extra number and remove and the final number is correct, you will be left without proper formatting! I solved this issue by changing the above code for this:

int i = 0;
if(  str.length() > old.length()){
    for (char m : mask.toCharArray()) {
        if (m != '#') {
        mascara += m;
            continue;
        }else{
            try {
                mascara += str.charAt(i);
            } catch (Exception e) {
                break;
            }
            i++;
        }
    }
}else{
    mascara = s.toString();
}