edittext 特殊字符过滤和字符长度限制

// 设置过滤字符函数(过滤掉我们不需要的字符)public static String stringFilter(String str)throws PatternSyntaxException{        String regEx = "[/\\:*?<>|\"\n\t]";        Pattern p = Pattern.compile(regEx);        Matcher m = p.matcher(str);        return m.replaceAll("");    }int mMaxLenth = 50；mEditText.addTextChangedListener(new TextWatcher() {            private int cou = 0;            int selectionEnd = 0;            @Override            public void onTextChanged(CharSequence s, int start, int before,                    int count) {                cou = before + count;                String editable = mEditText.getText().toString();                String str = stringFilter(editable);                if (!editable.equals(str)) {                    mEditText.setText(str);                }                mEditText.setSelection(mEditText.length());                cou = mEditText.length();            }            @Override            public void beforeTextChanged(CharSequence s, int start, int count,                    int after) {            }            @Override            public void afterTextChanged(Editable s) {                if (cou > mMaxLenth) {                    selectionEnd = mEditText.getSelectionEnd();                    s.delete(mMaxLenth, selectionEnd);                    if(androidVersion.charAt(0)>='4')                    {                        mEditText.setText(s.toString());                    }                }            }        });

原文参考： http://software.intel.com/zh-cn/blogs/2013/03/07/android-edittext/?utm_campaign=CSDN&utm_source=intel.csdn.net&utm_medium=Link&utm_content=android%E2%80%93%20edittext