Evenly spaced menu items on Toolbar

Question

So I\'ve been trying to implement android.support.v7.widget.Toolbar in my Activity and to make it look similar to the previously supported split ActionBar.

Answer 1

This solution take the best from each of above solutions , Thanks to inner_class7 ,Kuffs & MrEngineer13.
This solution evenly distribute the menu items and shows the text .

public class EvenlyDistributedToolbar extends android.support.v7.widget.Toolbar {

    private View actionMenuView;
    public EvenlyDistributedToolbar(Context context) {
        super(context);
        setContentInsetsAbsolute(0, 0);
    }

    public EvenlyDistributedToolbar(Context context, AttributeSet attrs) {
        super(context, attrs);
        setContentInsetsAbsolute(0, 0);
    }

    public EvenlyDistributedToolbar(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        setContentInsetsAbsolute(0, 0);
    }

    @Override
    public void addView(View child, ViewGroup.LayoutParams params) {
        if (child instanceof ActionMenuView) {
            actionMenuView  = child ;
            params.width = LayoutParams.MATCH_PARENT;

            ((ViewGroup)actionMenuView).setOnHierarchyChangeListener(new OnHierarchyChangeListener() {

                @Override 
                public void onChildViewRemoved(View parent, View child) {

                } 

                @Override 
                public void onChildViewAdded(View parent, View child) {
                    if (child instanceof ActionMenuItemView) {
                        //Show the menu item text as well as the the icon
                        ActionMenuItemView actionMenuItemView = (ActionMenuItemView) child;
                        // set the layout parameters on each View
                        actionMenuItemView.setExpandedFormat(true);
                        Drawable[] arr = actionMenuItemView.getCompoundDrawables();

                        if (arr != null && arr.length == 4 && arr[0] != null) {
                            actionMenuItemView.setGravity(Gravity.LEFT | Gravity.CENTER_VERTICAL);
                        }
                        else if (arr != null && arr.length == 4 && arr[2] != null) {
                            actionMenuItemView.setGravity(Gravity.RIGHT | Gravity.CENTER_VERTICAL);
                        }
                        actionMenuItemView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 16);
                        actionMenuItemView.setOnLongClickListener(null);

                    }
                } 
            }); 
        }
        super.addView(child, params);
    }


    /**
     * Show All items, call after the menu inflated
     */
    public void showAll() {
        Menu menu = getMenu();

        int size = menu.size();
        for (int i = 0; i < size; i++) {
            MenuItem item = menu.getItem(i);
            // check if app:showAsAction = "ifRoom"
            if (((MenuItemImpl) item).requestsActionButton()) {
                item.setShowAsAction(SupportMenuItem.SHOW_AS_ACTION_ALWAYS);
            }
        }
    }


}

        <com.util.EvenlyDistributedToolbar
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" />

Answer 2

If you create your menu programmatically rather than by inflating from resources, you can do this:

Use the SplitToolbar as mentioned in another answer. Get a reference to the toolbar using FindViewById as normal. If the toolbar does not exist in the layout, the menu functions as a normal non-split version.

import android.content.Context;
import android.support.v7.widget.ActionMenuView;
import android.support.v7.widget.Toolbar;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;

public class SplitToolbar extends Toolbar {
    public SplitToolbar(Context context) {
        super(context);
    }

    public SplitToolbar(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SplitToolbar(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public void addView(View child, ViewGroup.LayoutParams params) {
        if (child instanceof ActionMenuView) {
            params.width = LayoutParams.MATCH_PARENT;
        }
        super.addView(child, params);
    }
}

Then in your menu creation code do the following.

@Override
public boolean onPrepareOptionsMenu(Menu menu) {

    if (toolbar != null) {
       toolbar.setContentInsetsAbsolute(0,0);
        menu = toolbar.getMenu();
        toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem menuItem) {
                // Call back to the original menu code to handle menu clicks
                return onOptionsItemSelected(menuItem);
            }
        });
    }

    // Now build your menu as normal
    menu.clear();

    MenuItem b = menu.add(0, WHATEVER, 0, R.string.WHATEVER);
             b.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
             b.setIcon(R.drawable.ic_menu_encrypt);
    // End of normal menu code

    // Now set the button options.
    if (toolbar != null) {
        int size = menu.size();
        for (int i = 0; i < size; i++) {
            MenuItem item = menu.getItem(i);
            // check if app:showAsAction = "ifRoom"
            if (((MenuItemImpl) item).requestsActionButton()) {
                item.setShowAsAction(SupportMenuItem.SHOW_AS_ACTION_ALWAYS);
            }
        }
    }
    Return true; 
}