android EditText筛选，只允许英文，数字，汉字

android EditText只允许汉字，数字，字母出现，代码如下

ed_pwd.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 editable = ed_pwd.getText().toString();

String str = stringFilter(editable.toString());

if(!editable.equals(str)){

ed_pwd.setText(str);

//设置新的光标所在位置

ed_pwd.setSelection(str.length());

}

}

@Override

public void afterTextChanged(Editable s) {

}

});

public static String stringFilter(String str)throws PatternSyntaxException {

// 只允许字母、数字和汉字

String regEx = "[^a-zA-Z0-9\u4E00-\u9FA5]";//正则表达式

Pattern p = Pattern.compile(regEx);

Matcher m = p.matcher(str);

return m.replaceAll("").trim();

}