如何在CoordinatorLayout android中修复bottomnavigation菜单项的位置？

Question

我正在使用Android的BottomNavigation。

我为BottomNavigation创建了一个ViewBehavior类。我的BottomNavigation中有四个项目。我面临的问题是所选项目需要更大的空间。当我选择任何项目时，它需要更多的地方，然后其他人带有一点动画。但是我需要修理那些项目的地点。每个

可能的解决方案是什么？

我的BottomNavigationViewBehavior类是：

public class BottomNavigationViewBehavior extends CoordinatorLayout.Behavior<BottomNavigationView> {

private int height;

@Override
public boolean onLayoutChild(CoordinatorLayout parent, BottomNavigationView child, int layoutDirection) {
    height = child.getHeight();
    return super.onLayoutChild(parent, child, layoutDirection);
}

@Override
public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, BottomNavigationView child, View directTargetChild, View target, int nestedScrollAxes) {
    return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL;
}

@Override
public void onNestedScroll(CoordinatorLayout coordinatorLayout, BottomNavigationView child, View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
    if (dyConsumed > 0) {
        slideDown(child);
    } else if (dyConsumed < 0) {
        slideUp(child);
    }
}

private void slideUp(BottomNavigationView child) {
    child.clearAnimation();
    child.animate().translationY(0).setDuration(200);
}

private void slideDown(BottomNavigationView child) {
    child.clearAnimation();
    child.animate().translationY(height).setDuration(200);
}

}

这是我的xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_above="@+id/bottomNavigation"
    android:layout_alignParentTop="true"/>

<android.support.design.widget.BottomNavigationView
    android:id="@+id/bottomNavigation"
    android:layout_width="match_parent"
    android:layout_height="56dp"
    android:layout_gravity="bottom"
    android:background="@color/colorAccent"
    app:menu="@menu/navigation" />

</android.support.design.widget.CoordinatorLayout>

我目前的情况

Answer 1

确定。最后我从Here得到了答案。我只需要创建另一个类或方法作为BottomNavigationViewHelper。

Answer 2

使用此课程

class BottomNavigationViewHelper {

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 NO SUCH FIELD", "Unable to get shift mode field");
    } catch (IllegalAccessException e) {
        Log.e("ERROR ILLEGAL ALG", "Unable to change value of shift mode");
    }
}
}

并像这样使用这个类：

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

原始answer