当我按下号码时如何使用EditText onTextChanged事件？

Question

我有一个EditText带"text = 0.00".当我按下数字3时,应该是0.03第二次当我按下数字5时,文本应该是0.35.而且35.0,35.09像这样.在EditText最初具有的价值0.00.

这些都是用同样的方法完成的EditText.

我该如何实现这一目标？我已经尝试使用addTextChangedListener()带TextWatcher().

Answer 1

你也可以试试这个:

EditText searchTo = (EditText)findViewById(R.id.medittext);
searchTo.addTextChangedListener(new TextWatcher() {
    @Override
    public void afterTextChanged(Editable s) {
        // TODO Auto-generated method stub
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        // TODO Auto-generated method stub
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        doSomething();
    } 
});

Answer 2

您选择了正确的方法.你必须与TextWatcher和覆盖扩展类afterTextChanged(),beforeTextChanged(),onTextChanged().

您必须在afterTextChanged()方法中编写所需的逻辑,以实现您所需的功能.

Answer 3

在这里,我写了类似于你需要的东西:

    inputBoxNumberEt.setText(".     ");
    inputBoxNumberEt.setSelection(inputBoxNumberEt.getText().length());
    inputBoxNumberEt.addTextChangedListener(new TextWatcher() {

        boolean ignoreChange = false;

        @Override
        public void afterTextChanged(Editable s) {
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start,
                                      int count, int after) {
        }

        @Override
        public void onTextChanged(CharSequence s, int start,
                                  int before, int count) {
            if (!ignoreChange) {
                String string = s.toString();
                string = string.replace(".", "");
                string = string.replace(" ", "");
                if (string.length() == 0)
                    string = ".     ";
                else if (string.length() == 1)
                    string = ".  " + string;
                else if (string.length() == 2)
                    string = "." + string;
                else if (string.length() > 2)
                    string = string.substring(0, string.length() - 2) + "." + string.substring(string.length() - 2, string.length());
                ignoreChange = true;
                inputBoxNumberEt.setText(string);
                inputBoxNumberEt.setSelection(inputBoxNumberEt.getText().length());
                ignoreChange = false;
            }
        }
    });