如何覆盖 <ENTER>Android中虚拟键盘的按键行为

问题描述

我想覆盖虚拟键盘的 ENTER 键的行为，以便:

I want to override the behaviour of the ENTER key of the virtual keyboard so that:

• 当屏幕上有更多字段时，它会制表"到下一个字段
• 当它是屏幕的最后一个字段时，它执行屏幕的默认动作

我一直在使用 IME 选项和标签，但没有得到我想要的.有人有什么建议吗?

I've been playing with the IME options and labels, but just don't get what I want. Anybody have any suggestions?

推荐答案

在另一个论坛的帮助下，我找到了方法.

With help on another forum, I found the way to do it.

为了使其可重用，我创建了自己的超级对话框类，其中包含 2 个 OnKeyListener 对象和一个抽象提交方法:

To make it reusable, I have created my own super dialog class that contains 2 OnKeyListener objects and an abstract submit method:

public abstract class MyAbstractDialog extends Dialog {

/**
 * OnKeyListener that puts the focus down when the ENTER key is pressed
 */
protected View.OnKeyListener onEnterFocusDown = new View.OnKeyListener() {

                @Override
                public boolean onKey(View v, int keyCode, KeyEvent event) {
                if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
                            (keyCode == KeyEvent.KEYCODE_ENTER)) {
                                v.requestFocus(View.FOCUS_DOWN);
                        return true;
                }
                        return false;
                }
        };

/**
 * OnKeyListener that submits the page when the ENTER key is pressed
 */
protected View.OnKeyListener onEnterSubmitView = new View.OnKeyListener() {

                @Override
                public boolean onKey(View v, int keyCode, KeyEvent event) {
                if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
                            (keyCode == KeyEvent.KEYCODE_ENTER)) {
                                submitView(v);
                        return true;
                }
                        return false;
                }
        };
        protected abstract void submitView(View v);

}

现在在 Dialog 我可以使用这些对象来设置我的字段:

Now in the Dialog I can use these objects to set on my fields:

// make the ENTER key on passwordField1 put the focus on the next field
passwordField1.setOnKeyListener(onEnterFocusDown);

// make the ENTER key on passwordField2 submit the page
passwordField2.setOnKeyListener(onEnterSubmitView);

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