一、设置EditText只显示一行

android:maxLines=“1”
android:singleLine=“true”
android:inputType=“text”

二、监听输入

private TextWatcher BTNameOutSizeListener = 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) {

    }

    @Override
    public void afterTextChanged(Editable s) {
    xxx添加处理
};

初始化时mBtNameEdit.addTextChangedListener(BTNameOutSizeListener);