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);
}

}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub

}

@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub

}