如何在Android中为edittext设置keyListener？

Question

我想在EditText中输入一个十六进制数字。如何设置keyListener以限制输入值？

谢谢！

Answer 1

在EditText xml中使用android:inputType="number"

您还可以添加文字观察器editText.addTextChangedListener (new MyTextWatcher ());

private class MyTextWatcher implements 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) {


    }

    @Override
    public void afterTextChanged (Editable s) {

    }
}