在RecyclerView视图上捕获KeyEvent [英] Capture KeyEvent on RecyclerView Views

问题描述

按照此博客中的指示进行操作能够跟踪垂直列表适配器上的选定项目，但是我无法通过按某些键单击或长时间单击任何项​​目.

Following the directions on this blog post I am able to track the selected item on a vertical list Adapter, but I cannot click or long click any item by pressing some key.

我已经创建了此方法

public static boolean isConfirmButton(KeyEvent event){
    switch (event.getKeyCode()){
        case KeyEvent.KEYCODE_ENTER:
        case KeyEvent.KEYCODE_DPAD_CENTER:
        case KeyEvent.KEYCODE_BUTTON_A:
            return true;
        default:
            return false;
    }
}

拦截确认"按钮，但是在哪里收听KeyEvents正确呢?如何区分点击和longclick?

to intercept "confirm" buttons, but where's the right place to listen for KeyEvents? How to make a distinction between click and longclick?

推荐答案

我已经通过添加常规和长按按钮来编辑帖子中的代码:

I have edited the code from the post, by adding regular and long button presses:

@Override
public void onAttachedToRecyclerView(final RecyclerView recyclerView) {
    super.onAttachedToRecyclerView(recyclerView);

    mRecyclerView = recyclerView;

    // Handle key up and key down and attempt to move selection
    recyclerView.setOnKeyListener(new View.OnKeyListener() {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            RecyclerView.LayoutManager lm = recyclerView.getLayoutManager();

            // Return false if scrolled to the bounds and allow focus to move off the list
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {
                    return tryMoveSelection(lm, 1);
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_UP) {
                    return tryMoveSelection(lm, -1);
                } else if(KeyEventUtils.isConfirmButton(event)){
                    View view = mRecyclerView.findViewHolderForAdapterPosition(mSelectedItem).itemView;
                    if((event.getFlags() & KeyEvent.FLAG_LONG_PRESS)==KeyEvent.FLAG_LONG_PRESS) {
                        view.performLongClick();
                    }
                    else{
                        view.performClick();
                    }
                    return true;
                }
            }

            return false;
        }
    });
}

现在它可以正常工作，我不知道这是否是最优雅的方法.

Now it works properly, I don't know if it's the most elegant way.

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