底部导航栏android中超过3项

Question

我是Android的新手，我正在尝试在底部导航栏中创建一个包含3个以上元素的应用程序。我能够显示它们，但它们最终聚集在一起，只有三个可以正确显示。这是我的代码：

<android.support.design.widget.BottomNavigationView
    android:id="@+id/bottomNavigation"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:elevation="15dp"
    android:layout_gravity="bottom"
    android:layout_alignParentBottom="true"
    app:menu="@menu/bottom_nav_items" />

这是视图的图像：This is the snapshot

我卡住了请帮忙..

Answer 1

我不确定，但据我所知，使用底栏不可能伴随超过3个项目，而不会扭曲对齐方式。无论如何你可以做的是做一个水平方向的线性布局，然后将这些图标设置为图像视图，然后将它们的权重设为1。

这是代码，

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:gravity="center"
    android:layout_alignParentBottom="true"
    android:background="#fff">

        <ImageView
            android:layout_width="25dp"
            android:layout_height="25dp"
            android:src="(YOUR IMAGE SOURCE)"
            android:layout_centerVertical="true"
            android:layout_centerHorizontal="true"
            android:layout_weight="1"/>

然后像这样的其他图像视图。

Answer 2

您可以使用以下方法来获取群集菜单项。您必须在传递BottomNavigationView的onCreate方法中调用此方法。

// Method for disabling ShiftMode of BottomNavigationView
private 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);
            item.setShiftingMode(false);
            // set once again checked value, so view will be updated
            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);
    }
}

Answer 3

     <android.support.design.widget.BottomNavigationView
            android:id="@+id/navigation"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:background="?android:attr/windowBackground"
            app:menu="@menu/navigation" />


navigation.xml(inside menu)
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/navigation_home"
        android:icon="@drawable/ic_home_black_24dp"
        android:title="@string/title_home"
        app:showAsAction="always|withText"
        android:enabled="true"/>

    inside oncreate method
     BottomNavigationView navigation = (BottomNavigationView)findViewById(R.id.navigation);
      BottomNavigationViewHelper.disableShiftMode(navigation);//Dont forgot this line




    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);
            }
        }
    }