安卓：为什么我OnKeyListener（）不叫？ [英] Android: why is my OnKeyListener() not called?

问题描述

我定义一个EditText场，我想通知当用户编辑的字段。 因此，我认为：简单 - 我添加OnKeyListener，所以我做到了。但是，即使该文本字段被编辑（甚至显示输入/修改文本）我没有得到任何回调，即LOG输出显示不出来。

I defined an EditText-field and I want to be informed when the user edits that fields. So I thought: simple - I add an OnKeyListener and so I did. But even though the text field gets edited (and even displays the entered/modified text) I don't get any callback, i.e. the LOG-output doesn't show up.

    TextView text = new TextView(this);
    text.setText(...);
    ...
    text.setOnKeyListener(new OnKeyListener()
    {                           
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            TextView tv = (TextView)v;
            CharSequence val = tv.getText();
            Log.v(TAG, "value: " + val);
            // ... rest omitted for brevity
        }
    });

任何想法，为什么回调从不叫什么名字？

Any idea, why that callback is never called?

迈克尔

PS：无语了！ Android是真是充满奇特的！看来，几乎没有什么我感动至今曾立刻正如人们所期望的那样。而且 - 信不信由你 - 我有经验的GUI地段，ESP。在Java中（AWT，Swing的，SWT，你的名字......），但Android是一个非常艰难的野兽！

PS.: Sigh! Android is really full of oddities! It seems that almost nothing I touched so far worked immediatly as one would expect. And - believe it or not - I have LOTS of experience with GUIs, esp. in Java (AWT, Swing, SWT, you name it...) But Android is a really tough beast!

推荐答案

在编辑文本输入？我相信，onKeyListener只被使用硬件键盘事件调用。你最好还是使用TextWatcher如果你能。 <一href="http://stackoverflow.com/questions/1967740/onkeylistener-not-working-with-soft-keyboard-android">http://stackoverflow.com/questions/1967740/onkeylistener-not-working-with-soft-keyboard-android

Are you using the soft keyboard (ime) to type in the edit text? I believe that the onKeyListener only gets invoked with events from the hardware keyboard. You are better off using the TextWatcher if you can. http://stackoverflow.com/questions/1967740/onkeylistener-not-working-with-soft-keyboard-android

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