android - 如何在android中删除底部导航 View 的图标动画

Question

我在我的项目中实现了来自 Design Support Library 25 的底部导航 View 。我在 View 中有 5 个图标。 whenever an icon is selected it's having some animation.但是当 3 个或更少的图标没有显示任何动画时。我想删除那个动画，只需要对图标进行一些颜色更改。我怎样才能做到这一点？做了足够的谷歌搜索，但找不到解决方案。请帮忙。谢谢。

Answer 1

从 thread 得到答案.

移除动画或切换模式。

BottomNavigationView的实现有条件:当超过3个item时使用shift模式。

Create helper class

import android.support.design.internal.BottomNavigationItemView; 
import android.support.design.internal.BottomNavigationMenuView; 
import android.support.design.widget.BottomNavigationView; 
import android.util.Log;
import java.lang.reflect.Field;

public class BottomNavigationViewHelper { 
    public static void disableShiftMode(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);
                //noinspection RestrictedApi 
                item.setShiftingMode(false);
                // set once again checked value, so view will be updated 
                //noinspection RestrictedApi 
                item.setChecked(item.getItemData().isChecked());
            } 
        } catch (NoSuchFieldException e) {
            Log.e("BNVHelper", "Unable to get shift mode field", e);
        } catch (IllegalAccessException e) {
            Log.e("BNVHelper", "Unable to change value of shift mode", e);
        } 
    } 
} 

Usage

BottomNavigationView bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottom_navigation_bar);
BottomNavigationViewHelper.disableShiftMode(bottomNavigationView);