无法导入 android.support.design.internal。*

Question

正在尝试删除底部导航栏上的动画。 我的 Gradle 与库

正确同步

implementation 'com.android.support:design:29.0.0'

我试过检查过去对这类问题的回答，但仍然 import 语句中的设计关键字显示为红色

这是我的帮手class

package com.shubham.exp;

import android.util.Log;

import android.support.design.internal.BottomNavigationItemView;
import android.support.design.internal.BottomNavigationMenuView;

import com.google.android.material.bottomnavigation.BottomNavigationItemView;
import com.google.android.material.bottomnavigation.BottomNavigationMenuView;
import com.google.android.material.bottomnavigation.BottomNavigationView;

import java.lang.reflect.Field;

public class helper {
    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);
        }
    }
}

error: package android.support.design.internal does not exist

Answer 1

支持库29.0.0doesn't exist。删除此行。

//implementation 'com.android.support:design:29.0.0'

您有 2 个选择：

• 迁移到androidx并使用implementation 'com.google.android.material:material:1.0.0

• 使用支持库 28.0.0：implementation 'com.android.support:design:28.0.0'

最后删除 内部包的导入（你不需要它们）。

//import android.support.design.internal.BottomNavigationItemView;
//import android.support.design.internal.BottomNavigationMenuView;

Answer 2

有了新的 AndroidX 工件，不再使用支持库。所以你必须将它迁移到 AndroidX（如果你还没有这样做）并且在上面的代码中，你需要删除包导入，

import android.support.design.internal.BottomNavigationItemView; 
import android.support.design.internal.BottomNavigationMenuView;