BottomNavigationView - How to uncheck all MenuItems and keep Titles being displayed?

Question

As I liked the design from BottomNavigationView I decided to implement a new Menu for my App with it, instead of just using simple buttons.

I took this

Answer 1

I found my own solution merging my progress with this post.

Steps:

1. Update proguard-rules.pro and sync build
2. Create Helper to disable BottomNavigationView Shift Mode
3. Create an Item to hide on Menu.xml
4. Inflate BottomNavigationView
5. Set Item to be hidden as Checked GONE
6. Use Helper to disable Shifting Mode

Output:

Working code:

proguard-rules.pro:

-keepclassmembers class android.support.design.internal.BottomNavigationMenuView {
    boolean mShiftingMode;
}

BottomNavigationShiftHelper.java:

public class BottomNavigationShiftHelper {

    private final static String TAG = "DEBUG_BOTTOM_NAV_UTIL";

    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);
                item.setShiftingMode(false);
                // set once again checked value, so view will be updated
                item.setChecked(item.getItemData().isChecked());
            }
        } catch (NoSuchFieldException e) {
            Log.d(TAG, "Unable to get shift mode field");
        } catch (IllegalAccessException e) {
            Log.d(TAG, "Unable to change value of shift mode");
        }
    }
}

Activity Sample.java:

 private void loadNavigationBar() {
        BottomNavigationView bottomNavigationView = (BottomNavigationView)
                findViewById(R.id.navigation_bar);

        bottomNavigationView.getMenu().findItem(R.id.uncheckedItem).setChecked(true);
        bottomNavigationView.findViewById(R.id.uncheckedItem).setVisibility(View.GONE);

        BottomNavigationViewUtils.disableShiftMode(bottomNavigationView);

        bottomNavigationView.setOnNavigationItemSelectedListener(
                new BottomNavigationView.OnNavigationItemSelectedListener() {
                    @Override
                    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                        switch (item.getItemId()) {
                            case R.id.newList:
                                //Do The Math
                                break;
                            case R.id.loadList:
                                //Do The Math
                                break;
                            case R.id.settings:
                                //Do The Math
                                break;
                        }
                        return false;
                    }
                });
    }

BottomNavigationMenu.xml:

<?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/newList"
        android:enabled="true"
        android:icon="@drawable/new_list"
        android:title="@string/common.button.list.new"
        app:showAsAction="withText" />
    <item
        android:id="@+id/loadList"
        android:enabled="true"
        android:icon="@drawable/load"
        android:title="@string/common.button.list.load"
        app:showAsAction="withText" />
    <item
        android:id="@+id/settings"
        android:enabled="true"
        android:icon="@drawable/settings"
        android:title="@string/common.label.settings"
        app:showAsAction="withText" />
    <item
        android:id="@+id/uncheckedItem"
        android:title="" />
</menu>

BottomNavigationComponent (inside Activity.xml):

<android.support.design.widget.BottomNavigationView
    android:id="@+id/navigation_bar"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    app:itemIconTint="@color/white"
    app:itemTextColor="@color/white"
    android:background="@drawable/BottomNavigationMenu.xml"
    app:menu="@menu/supercart_bottom_navigation" />

Answer 2

mNavigationBottom.getMenu().setGroupCheckable(0, false, true);

Answer 3

There is an exception in accepted answer which we set maximum item we cant implement that code.So I got a code that is more simple than accepted code and it's also working with maximum item.

I referred from here Custom TextSize of BottomNavigationView support android

In your dimen.xml you can put:

<dimen name="design_bottom_navigation_text_size" tools:override="true">10sp</dimen>
<dimen name="design_bottom_navigation_active_text_size" tools:override="true">10sp</dimen>

Doing this you are overriding the default value of dimen that the internal classes of BottomNavigationView use. So be carreful.

Set this code in your onCreate method where the bottom navigation view initialized

mNavigationBottom.getMenu().setGroupCheckable(0, false, true);

and Last set your bottom navigation bar like this :

 <com.google.android.material.bottomnavigation.BottomNavigationView
    android:id="@+id/nav_view"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:layout_gravity="bottom"
    android:background="?android:attr/windowBackground"
    android:fitsSystemWindows="true"
    app:labelVisibilityMode="labeled"
    app:layout_anchorGravity="fill"
    app:menu="@menu/bottom_nav_menu" />

In this set your app:labelVisibilityMode to labeled

Answer 4

Thanks for your idea. I have implement it in my lib. I have a better way do it by reflect. So it won't show space.

If you have interest. Click here : https://github.com/ittianyu/BottomNavigationViewEx

private void initBottomViewAndLoadFragments(final BottomNavigationViewEx bnve) {
    bnve.enableAnimation(false);
    bnve.enableShiftingMode(false);
    bnve.enableItemShiftingMode(false);

    // use the unchecked color for first item
    bnve.setIconTintList(0, getResources().getColorStateList(R.color.bnv_unchecked_black));
    bnve.setTextTintList(0, getResources().getColorStateList(R.color.bnv_unchecked_black));

    bnve.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {

        private boolean firstClick = true;
        private int lastItemId = -1;

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            // restore the color when click
            if (firstClick) {
                firstClick = false;
                bnve.setIconTintList(0, getResources().getColorStateList(R.color.selector_bnv));
                bnve.setTextTintList(0, getResources().getColorStateList(R.color.selector_bnv));
            }

            if (firstClick || lastItemId == -1 || lastItemId != item.getItemId()) {
                lastItemId = item.getItemId();
            } else {
                return false;
            }

            // do stuff
            return fillContent(item.getItemId());
        }
    });
}

-- res/color/selector_bnv.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="@color/bnv_checked_white" android:state_checked="true" />
    <item android:color="@color/bnv_unchecked_black" />
</selector>

-- res/values/colors.xml

<color name="bnv_checked_white">@android:color/white</color>
<color name="bnv_unchecked_black">@android:color/black</color>