更多关于如何设置OnKeyListener，并让它监听Done按钮的细节。

首先将OnKeyListener添加到类的implements部分。然后添加OnKeyListener接口中定义的函数:

/*
 * Respond to soft keyboard events, look for the DONE press on the password field.
 */
public boolean onKey(View v, int keyCode, KeyEvent event)
{
    if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
        (keyCode == KeyEvent.KEYCODE_ENTER))
    {
        // Done pressed!  Do something here.
    }
    // Returning false allows other listeners to react to the press.
    return false;
}

给定一个EditText对象:

EditText textField = (EditText)findViewById(R.id.MyEditText);
textField.setOnKeyListener(this);

更多关于如何设置OnKeyListener，并让它监听Done按钮的细节。

首先将OnKeyListener添加到类的implements部分。然后添加OnKeyListener接口中定义的函数:

/*
 * Respond to soft keyboard events, look for the DONE press on the password field.
 */
public boolean onKey(View v, int keyCode, KeyEvent event)
{
    if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
        (keyCode == KeyEvent.KEYCODE_ENTER))
    {
        // Done pressed!  Do something here.
    }
    // Returning false allows other listeners to react to the press.
    return false;
}

给定一个EditText对象:

EditText textField = (EditText)findViewById(R.id.MyEditText);
textField.setOnKeyListener(this);

试试这个，它应该能满足你的需要:

editText.setOnEditorActionListener(new EditText.OnEditorActionListener() {
    @Override
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
    if (actionId == EditorInfo.IME_ACTION_DONE) {
       //do here your stuff f
       return true;
    }
    return false;
    } 
});

<EditText android:imeOptions="actionDone"
          android:inputType="text"/>

Java代码如下:

edittext.setOnEditorActionListener(new OnEditorActionListener() { 
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
        if (actionId == EditorInfo.IME_ACTION_DONE) {
            Log.i(TAG,"Here you can write the code");
            return true;
        }    
        return false;
    }
});

芬兰湾的科特林解决方案

在Kotlin中处理它的基本方式是:

edittext.setOnEditorActionListener { _, actionId, _ ->
    if (actionId == EditorInfo.IME_ACTION_DONE) {
        callback.invoke()
        return@setOnEditorActionListener true
    }
    false
}

芬兰湾的科特林扩展

使用这个来调用edittext。onDone{/*action*/}在你的主代码。使您的代码更具可读性和可维护性

fun EditText.onDone(callback: () -> Unit) {
    setOnEditorActionListener { _, actionId, _ ->
        if (actionId == EditorInfo.IME_ACTION_DONE) {
            callback.invoke()
            return@setOnEditorActionListener true
        }
        false
    }
}

不要忘记在编辑文本中添加这些选项

<EditText ...
    android:imeOptions="actionDone"
    android:inputType="text"/>

如果你需要inputType="textMultiLine"支持，请阅读这篇文章

多亏了奇卡。anddev和Kotlin的Alex Cohn是:

text.setOnEditorActionListener { v, actionId, event ->
    if (actionId == EditorInfo.IME_ACTION_DONE ||
        event?.action == KeyEvent.ACTION_DOWN && event.keyCode == KeyEvent.KEYCODE_ENTER) {
        doSomething()
        true
    } else {
        false
    }
}

这里我检查Enter键，因为它返回EditorInfo。IME_NULL代替IME_ACTION_DONE。

另见Android imeOptions="actionDone"不工作。在EditText中添加android:singleLine="true"。