Android TV DatePicker如何通过遥控器确认编辑并跳转焦点至Apply按钮

该需求完全可以实现，核心逻辑是通过监听DatePicker的遥控器按键事件，在用户按下确认键时主动将焦点转移到Apply按钮即可。

问题根因 #

原生DatePicker默认会拦截遥控器上下方向键的事件，用于调整年/月/日的数值，所以你按下下键只会修改日期，无法直接切换到下方的按钮。

修改步骤 #

在你现有代码的datePicker.init逻辑执行完成后，为DatePicker添加按键监听即可，需要注意导入android.view.KeyEvent类避免编译报错，完整修改后代码如下：

public class DateSelector {
    public static void showSubscriptionDateDialog(Context context, long expiredAt, DateSetListener listener) {
        Dialog dialog = new Dialog(context, R.style.DialogTheme);
        dialog.setContentView(R.layout.dialog_subscription_date);
        DatePicker datePicker = dialog.findViewById(R.id.date_picker);
        TextView dateLabel = dialog.findViewById(R.id.subscription_date);
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(expiredAt);
        AtomicInteger dayForSave = new AtomicInteger();
        dayForSave.set(calendar.get(Calendar.DATE));
        AtomicInteger monthForSave = new AtomicInteger();
        monthForSave.set(calendar.get(Calendar.MONTH));
        AtomicInteger yearForSave = new AtomicInteger();
        yearForSave.set(calendar.get(Calendar.YEAR));
        setDateLabel(yearForSave, monthForSave, dayForSave, dateLabel);
        Button buttonBack = dialog.findViewById(R.id.button_back);
        buttonBack.setOnClickListener(v -> {
            dialog.dismiss();
        });
        // 你代码中的buttonClear就是对应Apply按钮
        Button buttonClear = dialog.findViewById(R.id.button_clear);
        buttonClear.setOnClickListener(v -> {
            calendar.set(yearForSave.get(), monthForSave.get(), dayForSave.get());
            listener.onDateSelected(calendar.getTimeInMillis());
            dialog.dismiss();
        });
        datePicker.init(yearForSave.get(), monthForSave.get(), dayForSave.get(),
                (view, year1, monthOfYear, dayOfMonth) -> {
                    yearForSave.set(year1);
                    monthForSave.set(monthOfYear);
                    dayForSave.set(dayOfMonth);
                    setDateLabel(yearForSave, monthForSave, dayForSave, dateLabel);
                });
        // 新增代码：监听DatePicker的遥控器按键事件
        datePicker.setOnKeyListener((v, keyCode, event) -> {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                // 匹配遥控器确认键
                if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER || keyCode == KeyEvent.KEYCODE_ENTER) {
                    buttonClear.requestFocus();
                    return true;
                }
                // 如果需要同时支持下键切焦点，可以取消注释下面这段逻辑
                /*
                if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {
                    buttonClear.requestFocus();
                    return true;
                }
                */
            }
            return false;
        });
        buttonClear.requestFocus();
        dialog.show();
    }

    private static void setDateLabel(AtomicInteger yearForSave, AtomicInteger monthForSave,
                              AtomicInteger dayForSave, TextView dateLabel) {
        Calendar calendar = Calendar.getInstance();
        Locale locale = Locale.getDefault();
        SimpleDateFormat dateFormat = new SimpleDateFormat("EE, d MMMM, yyyy", locale);
        calendar.set(yearForSave.get(), monthForSave.get(), dayForSave.get());
        String expirationDate = dateFormat.format(calendar.getTime());
        dateLabel.setText(expirationDate);
    }

    public interface DateSetListener {
        void onDateSelected(long expiredAt);
    }
}

效果说明 #

修改完成后，当用户在DatePicker编辑状态按下遥控器确认键，焦点会直接切换到Apply按钮，再次按下确认即可触发Apply的点击逻辑。

内容的提问来源于stack exchange，提问作者kumaser