Android - 检查一个 EditText 输入框，每次输入一个字符

Question

每次用户在 EditText 框中键入字符时，我都会尝试检查。

是否有某种类型的OnChangeListener？

Answer 1

您可以使用 textChangeListener检测 edittext 值是否在点击输入键盘时发生变化

示例:

edditext.addTextChangedListener(new TextWatcher(){
    public void afterTextChanged(Editable s) {}
    public void beforeTextChanged(CharSequence s, int start, int count, int after){}
    public void onTextChanged(CharSequence s, int start, int before, int count){
            //s is the current character in the eddittext after it is changed
    }
});