如何在 Android / Google Glass 中管理语音和触摸输入的多个菜单

Question

我正在开发一个 Google Glass 应用程序，可以向用户显示 n 张卡片，每张卡片都有其 自定义菜单 .

用户应该能够通过语音 ('Ok Glass') 和触摸 ('Tap').以下示例仅处理两张卡片（和两个菜单）：

public class JobActivity extends Activity {
    // Manages CardScrollView and CardScrollAdapter
    private CardHolder mCardHolder;                               

    private Menu mCustomMenu;                              
    private GestureDetector mGestureDetector;            

    @Override
    protected void onCreate(Bundle bundle)
    {
        super.onCreate(bundle);
        mCardHolder = new CardHolder(this);

        getWindow().requestFeature(WindowUtils.FEATURE_VOICE_COMMANDS);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

        setContentView(mCardHolder.getView());
    }
    mGestureDetector = createGestureDetector(this);
}

private GestureDetector createGestureDetector(Context context) {
    GestureDetector gestureDetector = new GestureDetector(context);

    gestureDetector.setBaseListener(new GestureDetector.BaseListener() {
        @Override
        public boolean onGesture(Gesture gesture) {
            if (gesture == Gesture.TAP) {
                openOptionsMenu();
                return true;
            } else if (gesture == Gesture.SWIPE_RIGHT) {
                if (mCardHolder.getCurrentCardPos() == 0) {
                    // Moves to the next card automatically
                    updateOptionsMenu(getCardTwoMenuItems());
                }
                return true;
            } else if (gesture == Gesture.SWIPE_LEFT) {
                if (mCardHolder.getCurrentCardPos() == 1) {
                    // Moves to the previous card automatically
                    updateOptionsMenu(getCardOneMenuItems());
                }
                return true;
            }
            return false;
        }
    });
    return gestureDetector;
}

@Override
public boolean onGenericMotionEvent(MotionEvent event) {
    if (mGestureDetector != null) return mGestureDetector.onMotionEvent(event);
    return false;
}

@Override
protected void onResume() {
    super.onResume();
    mCardHolder.activate();
}

@Override
protected void onPause() {
    mCardHolder.deactivate(); }
    super.onPause();
}

@Override
public boolean onCreatePanelMenu(int featId, Menu menu) {
    if (featId == WindowUtils.FEATURE_VOICE_COMMANDS || featId == Window.FEATURE_OPTIONS_PANEL) {
        List<String> itemList = getCardOneMenuItems();
        mCustomMenu = menu;

        for (int i = 0; i < itemList.size(); i++)
            mCustomMenu.add(Menu.NONE, i, Menu.NONE, itemList.get(i));

        super.onCreatePanelMenu(featId, mCustomMenu);
        return true;
    }
    return false;
}

private void updateOptionsMenu(List<String> itemList) {
    if (mCustomMenu != null) mCustomMenu.clear();                    

    for (int i = 0; i < itemList.size(); i++)
        mCustomMenu.add(Menu.NONE, i, Menu.NONE, itemList.get(i));

    if (mCustomMenu != null) onPrepareOptionsMenu(mCustomMenu);  
}

@Override
public boolean onMenuItemSelected(int featId, MenuItem menuItem) {
    if (featId == WindowUtils.FEATURE_VOICE_COMMANDS || featId == Window.FEATURE_OPTIONS_PANEL) {

        if (mCardHolder.getCurrentCardPos() == 0) {
            // An item was selected from the menu in the first card

            if (menuItem.getItemId() == 0) {
                // User selected 'Goto the next card'
                updateOptionsMenu(getCardTwoMenuItems());
                mCardHolder.next();     // Moves to the next card
            } else if (menuItem.getItemId() == 1) doSomething();
            else if (menuItem.getItemId() == 2) doSomethingElse();

        } else if (mCardHolder.getCurrentCardPos() == 1) {
            // An item was selected from the menu in the second card

            if (menuItem.getItemId() == 0) {
                updateOptionsMenu(getCardOneMenuItems());
                mCardHolder.previous(); // Moves to the previous card
            } else if (menuItem.getItemId() == 1) doSomethingMore();
        }
        return true;
    }
    return super.onMenuItemSelected(featId, menuItem);
}

private List<String> getCardTwoMenuItems() {
    List<String> cardTwoMenuItems = new ArrayList<>();
    cardTwoMenuItems.add(getResources().getString(R.string.card_previous));
    cardTwoMenuItems.add(getResources().getString(R.string.something_more));
    return cardTwoMenuItems;
}

private List<String> getCardOneMenuItems() {
    List<String> cardOneMenuItems = new ArrayList<>();
    cardOneMenuItems.add(getResources().getString(R.string.card_next));
    cardOneMenuItems.add(getResources().getString(R.string.something));
    cardOneMenuItems.add(getResources().getString(R.string.something_else));
    return cardOneMenuItems;
}

上面的代码适用于几种情况：

如果我说'Ok Glass'和'Go to the next card'。说 'Ok Glass'，现在在第二张卡片中，调出 正确的 菜单。
如果我点击和select'Go to the next card'。 再次点击，现在在第二张卡片中，调出正确的菜单。
如果我向右滑动。说 'Ok Glass'，现在在第二张卡片中，调出 正确的 菜单。

但是，代码在以下情况下不起作用：

如果我说'Ok Glass'和'Go to the next card'。如果我点击，现在在第二张卡片中，它会弹出 不正确的 菜单（来自第一张卡片的菜单）。
如果我向右滑动。如果我点击，现在在第二张卡片中，它会弹出 不正确的 菜单（来自第一张卡片的菜单）。
如果我点击和select'Go to the next card'。说 'Ok Glass'，现在在第二张卡片中，调出 不正确的 菜单（来自第一张卡片的菜单）。

Answer 1

解决方案在onPrepareOptionsMenu

public boolean onPrepareOptionsMenu (Menu menu){

    for (int i = 0; i < mJobMenu.size(); i++)
        menu.add(Menu.NONE, i, Menu.NONE, mJobMenu.getItem(i));

}

onPrepareOptionsMenu 由系统调用，菜单项被添加到传递给它的菜单中。每次调用菜单时都会发生这种情况（无论是通过点击还是玻璃）。因此，如果您覆盖此方法，您应该能够在菜单中插入值

如何在 Android / Google Glass 中管理语音和触摸输入的多个菜单

How to manage multiple menus for voice and touch input in Android / Google Glass

android

google-glass

google-gdk

android-menu