EditText 监听文本变化

                mEditText.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) {
                    //文本变化中

                }

                @Override
                public void afterTextChanged(Editable s) {
                    //文本变化之后

                  String  s= s + "";   //文本变化后的内容
                   
                }
            });