android输入框内容改变的监听事件实例

public void afterTextChanged(Editable arg0) {// 文字改变后出发事件String content = editText.getText().toString();    //若输入框内容为空按钮可点击，字体为蓝色if (!content.isEmpty()) {textView.setClickable(true);textView.setEnabled(true);textView.setTextColor(Color.BLUE);} else {textView.setClickable(false);textView.setEnabled(false);textView.setTextColor(Color.GRAY);}}@Overridepublic void beforeTextChanged(CharSequence arg0, int arg1, int arg2,int arg3) {// TODO Auto-generated method stub}@Overridepublic void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {// TODO Auto-generated method stub}