找回旧的BottomBar [英] Getting back the old BottomBar

问题描述

仅启动了一个新应用，当包含 BottomNavigationView 时，结果如下所示：

Just started a new app and when including a BottomNavigationView the result look like that :

我真的不知道它来自哪里，如何回到仍在规范

I really don't get where it come from and how can I get back to the old version that are still defined in the spec

有人知道这些变化的来源吗？

Does someone know where these changes come from ?

推荐答案

默认情况下，当BottomNavigationView包含3个以上项目时，添加shiftingmode = true。因此，请尝试以下操作

by default BottomNavigationView add shiftingmode = true when its more than 3 items. so try this

static void removeShiftMode(BottomNavigationView view) {
    BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
    try {
        Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
        shiftingMode.setAccessible(true);
        shiftingMode.setBoolean(menuView, false);
        shiftingMode.setAccessible(false);
        for (int i = 0; i < menuView.getChildCount(); i++) {
            BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
            item.setShiftingMode(false);
            // set once again checked value, so view will be updated
            item.setChecked(item.getItemData().isChecked());
        }
    } catch (NoSuchFieldException e) {
        Log.e("ERROR ", "Unable to get shift mode field"+e);
    } catch (IllegalAccessException e) {
        Log.e("ERROR", "Unable to change value of shift mode"+e);
    }
}


BottomNavigationView bottomNavigationView = (BottomNavigationView)findViewById(R.id.bottomBar);
BottomNavigationViewHelper.removeShiftMode(bottomNavigationView);

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