在 RecyclerView 视图上捕获 KeyEvent

Question

按照 this 博客上的说明 post 我可以在垂直列表适配器上跟踪所选项目，但我无法通过按某个键单击或长按任何项目。

我已经创建了这个方法

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"confirm"按钮，但哪里是监听KeyEvents的正确位置？如何区分点击和长按？

Answer 1

我编辑了 post 中的代码，添加了定期和长按按钮：

@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;
        }
    });
}

现在可以正常使用了，不知道是不是最优雅的方式。

在 RecyclerView 视图上捕获 KeyEvent

Capture KeyEvent on RecyclerView Views

android

android-keypad

android-recyclerview