Android 以编程方式更改BottomNavigationView文本大小

我在android应用程序中获得了一个

BottomNavigationView

，我设置了自定义文本大小

25sp
22便士

---

现在，由于我在这个应用程序中实现了多种语言，我需要以编程方式更改

BottomNavigationView

的文本大小。但是，由于我使用dimens设置字体大小的方式，我现在不知道如何通过代码进行更改。

您可以使用以下方法：

private void setBottomNavigationLabelsTextSize(BottomNavigationView bottomNavigationView, float ratio) {
    for (int i = 0; i < bottomNavigationView.getChildCount(); i++) {
        View item = bottomNavigationView.getChildAt(i);

        if (item instanceof BottomNavigationMenuView) {
            BottomNavigationMenuView menu = (BottomNavigationMenuView) item;

            for (int j = 0; j < menu.getChildCount(); j++) {
                View menuItem = menu.getChildAt(j);

                View small = menuItem.findViewById(android.support.design.R.id.smallLabel);
                if (small instanceof TextView) {
                    float size = ((TextView) small).getTextSize();
                    ((TextView) small).setTextSize(TypedValue.COMPLEX_UNIT_PX, ratio * size);
                }
                View large = menuItem.findViewById(android.support.design.R.id.largeLabel);
                if (large instanceof TextView) {
                    float size = ((TextView) large).getTextSize();
                    ((TextView) large).setTextSize(TypedValue.COMPLEX_UNIT_PX, ratio * size);
                }
            }
        }
    }
}

将标签中文本的大小增加一倍

private void setBottomNavigationLabelsTextSize(BottomNavigationView bottomNavigationView, float ratio) {
    for (int i = 0; i < bottomNavigationView.getChildCount(); i++) {
        View item = bottomNavigationView.getChildAt(i);

        if (item instanceof BottomNavigationMenuView) {
            BottomNavigationMenuView menu = (BottomNavigationMenuView) item;

            for (int j = 0; j < menu.getChildCount(); j++) {
                View menuItem = menu.getChildAt(j);

                View small = menuItem.findViewById(android.support.design.R.id.smallLabel);
                if (small instanceof TextView) {
                    float size = ((TextView) small).getTextSize();
                    ((TextView) small).setTextSize(TypedValue.COMPLEX_UNIT_PX, ratio * size);
                }
                View large = menuItem.findViewById(android.support.design.R.id.largeLabel);
                if (large instanceof TextView) {
                    float size = ((TextView) large).getTextSize();
                    ((TextView) large).setTextSize(TypedValue.COMPLEX_UNIT_PX, ratio * size);
                }
            }
        }
    }
}

setBottomNavigationLabelsTextSize(bottomNavigationView, 2.0f);