改变文本后屏幕就会冻结

Question

在用到addChangeTextListener的时候，一按键屏幕就不动了，代码如下：

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


    email.addTextChangedListener(new TextWatcher() 
    { 
        @Override
        public void afterTextChanged(Editable s) 
        { 
            if (email.getText().toString().matches("[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+") 
                    && s.length() > 0)
                error.setText("valid email");
            else
               email.setText("invalid email");              
        }
        @Override
        public void beforeTextChanged(CharSequence arg0, int arg1,int arg2, int arg3) 
        {   
        }
        @Override
        public void onTextChanged(CharSequence arg0, int arg1,int arg2, int arg3) 
        {                   
        } 
    });

Answer 1

email.setText("invalid email");

上面的代码应该是：

error.setText("invalid email");

使用setText(), 再次触发afterTextChanged()