安其事件调度两次，当我键入一些文本到文本框。如何prevent？ [英] OnKey event dispatched twice when I type some text into a textbox. How to prevent?

问题描述

在我的调试会话，我发现发生了一件怪事。我对我所定义的当前活动为的EditText 控制 OnKeyListener ，同时用户类型进行验证。

during my debug sessions I found a strange thing occurring. I have an EditText control for which I defined the current activity as OnKeyListener to perform validation while user types.

code

txtPhoneNumber.setOnEditorActionListener(this);
txtPhoneNumber.setOnKeyListener(this);
txtPhoneNumber.setOnFocusChangeListener(this);

@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
    String phoneNumber = ((TextView) v).getText().toString();
    if (phoneNumber != null && !"".equals(phoneNumber))
        setValidPhoneNumber(checkValidPhoneNumber(phoneNumber));

    setForwardButtonEnabled(this.validPhoneNumber && this.readyToGo);

    if (actionId == EditorInfo.IME_ACTION_DONE) {
        InputMethodManager in = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        in.hideSoftInputFromWindow(v.getApplicationWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
    }

    return false;
}

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {

    String phoneNumber = ((TextView) v).getText().toString();
    if (phoneNumber != null && !"".equals(phoneNumber))
        setValidPhoneNumber(checkValidPhoneNumber(phoneNumber));

    setForwardButtonEnabled(this.validPhoneNumber && this.readyToGo);

    return false;
}

OK我可以承认，这是一个相当多余的，当用户为pressing回车键，不仅仅是关闭软键盘更再次执行验证。不过，我发现，安其事件分派两次。

OK I can admit that this is quite redundant to perform validation again when the user is pressing the Enter key, more than just closing the soft keyboard. However I found that the OnKey event is dispatched twice.

例如我写 3551234567 ，我已经输入 355 。当我preSS 1，一个触发事件具有 v.getText（） = 355 旁边另一个事件有 v.getText（） = 3551 。

For example I'm writing 3551234567 and I already typed 355. When I press 1, one event is fired having v.getText() = 355 and next another event has v.getText() = 3551.

我想知道这是正常的，如果这可以通过区别，如果这是一个preOnKeyEvent或postOnKeyEvent是可以避免的。我只需要字符串的之后的情况下，没有的前的

I would like to know if this is normal and if this can be avoided by either distinguishing if this is a "preOnKeyEvent" or "postOnKeyEvent". I only need the string after the event, not before.

感谢您

推荐答案

你可能得到两个键，/键向上事件。

You are probably getting both the key down/key up events.

尝试通过检查该KeyEvent的行动为ACTION_UP行动过滤你的方法。

Try filtering your method by checking the action of the KeyEvent for an ACTION_UP action.

以获取更多信息。

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