补充前面博客的邮箱边输边显示提示控件

java代码引用上述控件

mOptionalTip = (AutoCompleteEmailEdit) findViewById(R.id.optional_tip);

mOptionalTip.init();
?mOptionalTip.addTextChangedListener(mTextWatcher);

private TextWatcher mTextWatcher = new TextWatcher() {

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

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

??public void onTextChanged(CharSequence s, int start, int before,
????int count) {
???if (!TextUtils.isEmpty(s) && s.toString().trim().length() > 0) {
????mOptionalTip.createCandidateEmail(s.toString().trim());
???}
??}
?};

补充TextUtils.isEmpty(s)可以判断空字符串或是空，不能判断空格，s.toString().trim().length() > 0这句用来排除空格

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