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标题: 去除BottomNavigationView的Item大于3个时的动画效果 [打印本页]

作者: admin 时间: 2020-11-26 21:04
标题: 去除BottomNavigationView的Item大于3个时的动画效果
当BottomNavigation的Item超过3个时选择会有动画效果，且选中Item时文字才会显示，下面是解决方案：
sdk版本小于28时用反射解决
public class BottomNavigationViewHelper {
@SuppressLint("RestrictedApi")
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) {
      } catch (IllegalAccessException e) {
      }
}
}

BottomNavigationViewHelper.disableShiftMode(navigation);

sdk版本大于等于28时置属性解决
   app:itemHorizontalTranslationEnabled="false"
   app:labelVisibilityMode="labeled"

如
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/nav_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="0dp"
android:layout_marginEnd="0dp"
android:background="?android:attr/windowBackground"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="@menu/bottom_nav_menu"

app:itemHorizontalTranslationEnabled="false"
app:labelVisibilityMode="labeled"
/>

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