EditText屏蔽特殊字符（设置键盘不接受回车。。用URLEncoder.encode()就可以解决）

et_content = (EditText) findViewById(R.id.et_content);

et_content.addTextChangedListener(watcher);

et_content.setOnEditorActionListener(new OnEditorActionListener() {

@Override

public boolean onEditorAction(TextView v, int actionId,

KeyEvent event) {

if (actionId == EditorInfo.IME_ACTION_UNSPECIFIED) {

return true;

}

return false;

}

});

//输入表情前EditText中的文本

private String tmp;

//是否重置了EditText的内容

private boolean resetText;

private TextWatcher watcher = new TextWatcher() {

@Override

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

if(!resetText){

String regEx="[`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";

Pattern p = Pattern.compile(regEx);

Matcher m = p.matcher(s.toString());

if( m.find()){

et_content.setText(tmp);

et_content.invalidate();

Toast.makeText(YiJianFanKuiActivity.this, "不允许输入特殊符号！", Toast.LENGTH_LONG).show();

}

}else{

resetText = false;

}

}

@Override

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

if(!resetText){

tmp = s.toString();//这里用s.toString()而不直接用s是因为如果用s，那么，tmp和s在内存中指向的是同一个地址，s改变了，tmp也就改变了，那么表情过滤就失败了

}

}

@Override

public void afterTextChanged(Editable s) {

Editable etext = et_content.getText();

Selection.setSelection(etext, etext.length());

}

};