Question

所以我一直在尝试在我的Activity中实现android.support.v7.widget.Toolbar，并使其看起来与之前支持的拆分ActionBar类似。

以下是我工具栏的XML：

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar_btm"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:minHeight="?attr/actionBarSize"
    android:background="@color/toolbar_bkgnd"
    android:layout_alignParentBottom="true"
    app:theme="@style/ToolBarTheme" />

这是我正在使用的工具栏的样式：

<style name="ToolBarTheme" parent="Theme.AppCompat">
    <item name="actionButtonStyle">@style/ActionButtonStyle</item>
    <item name="android:actionButtonStyle">@style/ActionButtonStyle</item>
    <item name="android:textColor">@android:color/white</item>
</style>

工具栏菜单按钮的样式，我的初步计划是根据屏幕大小计算minWidth，然后为每个菜单按钮设置它。

<style name="ActionButtonStyle" parent="@android:style/Widget.Holo.Light.ActionButton">
    <item name="android:minWidth">56dip</item>
    <item name="android:paddingLeft">0dip</item>
    <item name="android:paddingRight">0dip</item>
</style>

最后，这就是我在活动中所说的。

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar_btm);
toolbarBtm.inflateMenu(R.id.menu);

问题是底部Toolbar中的菜单项是这样对齐的： Right aligned menu items

但是我希望它们像这样均匀分布：

Evenly spaced menu items

Answer 1

Here's对我有用*：

EnhancedMenuInflater.java

import android.support.v4.internal.view.SupportMenuItem;
import android.support.v7.internal.view.menu.MenuItemImpl;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

import here.is.your.R;

public class EnhancedMenuInflater {

    public static void inflate(MenuInflater inflater, Menu menu, boolean forceVisible) {
        inflater.inflate(R.menu.menu, menu);

        if (!forceVisible) {
            return;
        }

        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);
            }
        }
    }
}

MainActivity.java

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    if (toolbar == null) {
        EnhancedMenuInflater.inflate(getMenuInflater(), menu, false);
    }
    return super.onCreateOptionsMenu(menu);
}

// somewhere after views have been set.
if (toolbar != null) {
    EnhancedMenuInflater.inflate(getMenuInflater(), toolbar.getMenu(), true);
    toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
        @Override
        public boolean onMenuItemClick(MenuItem item) {
            return onOptionsItemSelected(item);
        }
    });
}

SplitToolbar.java

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);
    }
}

Layout.xml

<here.is.my.SplitToolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"/>

当我说工作时，我的意思是它在我的菜单，文字和图像中都集中了一切。如果您只使用菜单图标，那么它看起来会很棒。我还在寻找一种方法让它们居中，让文字就在图标旁边。

Answer 2

<强>更新

谷歌现在拥有非常相似的功能，使用新的Widget调用BottomNavigationView

夸大菜单膨胀的正常方式

- 原始答案 -

伙计们花了我一些时间来弄清楚，在这里你会进行一些繁重的操作，但它确实有效。

我在Toolbar上使用它来显示屏幕底部，就像旧的SplitActionBar ...

在工具栏上显示均匀分布的MenuItem

我不建议使用超过5或6个项目，它可能会有点拥挤...

/**
 * This method will take however many items you have in your  
 * menu/menu_main.xml and distribute them across your devices screen
 * evenly using a Toolbar. Enjoy!!
 */
public void setupEvenlyDistributedToolbar(){
    // Use Display metrics to get Screen Dimensions
    Display display = getWindowManager().getDefaultDisplay();
    DisplayMetrics metrics = new DisplayMetrics();
    display.getMetrics(metrics);

    // Toolbar
    mToolbar = (Toolbar) findViewById(R.id.navigationToolbar);
    // Inflate your menu
    mToolbar.inflateMenu(R.menu.menu_bottom);

    // Add 10 spacing on either side of the toolbar
    mToolbar.setContentInsetsAbsolute(10, 10);

    // Get the ChildCount of your Toolbar, this should only be 1
    int childCount = mToolbar.getChildCount();
    // Get the Screen Width in pixels
    int screenWidth = metrics.widthPixels;

    // Create the Toolbar Params based on the screenWidth
    Toolbar.LayoutParams toolbarParams = new Toolbar.LayoutParams(screenWidth, LayoutParams.WRAP_CONTENT);

    // Loop through the child Items
    for(int i = 0; i < childCount; i++){
        // Get the item at the current index
        View childView = mToolbar.getChildAt(i);
        // If its a ViewGroup
        if(childView instanceof ViewGroup){
            // Set its layout params
            childView.setLayoutParams(toolbarParams);
            // Get the child count of this view group, and compute the item widths based on this count & screen size
            int innerChildCount = ((ViewGroup) childView).getChildCount();
            int itemWidth  = (screenWidth / innerChildCount);               
            // Create layout params for the ActionMenuView
            ActionMenuView.LayoutParams params = new ActionMenuView.LayoutParams(itemWidth, LayoutParams.WRAP_CONTENT);
            // Loop through the children
            for(int j = 0; j < innerChildCount; j++){
                View grandChild = ((ViewGroup) childView).getChildAt(j);
                if(grandChild instanceof ActionMenuItemView){
                    // set the layout parameters on each View
                    grandChild.setLayoutParams(params);
                }
            }
        }
    }
}

Answer 3

检查一下。

<android.support.v7.widget.Toolbar
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:abc="http://schemas.android.com/apk/res-auto"
        android:id="@+id/toolbar"
        android:layout_height="?attr/actionBarSize"
        android:layout_width="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ImageView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:id="@+id/action1"
            android:background="@color/red_700"/>

        <ImageView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:id="@+id/action2"
            android:background="@color/red_200"/>

        <ImageView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:id="@+id/action3"
            android:background="@color/red_100"/>

    </LinearLayout>

</android.support.v7.widget.Toolbar>

将ImageView替换为您想要的任何内容。

Answer 4

这是我发布的另一个类似问题的解决方案，因为在我的底部工具栏上我想要等间距的按钮： android add two toolbars in the same activity

Answer 5

此解决方案充分利用了上述每种解决方案，感谢inner_class7，Kuffs＆amp; MrEngineer13。
此解决方案均匀分布菜单项并显示文本。

public class EvenlyDistributedToolbar扩展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 6

如果以编程方式创建菜单而不是通过资源扩充，则可以执行以下操作：

使用另一个答案中提到的SplitToolbar。正常使用FindViewById获取对工具栏的引用。如果布局中不存在工具栏，则菜单将作为普通的非拆分版本。

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);
    }
}

然后在菜单创建代码中执行以下操作。

@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; 
}

Answer 7

我的建议是遵循design guidelines。如果您使用的是toolbar，请将menu项保留在设计目的的位置。

但是，如果您想要相等的间距，请考虑使用Tabs

或Bottom Navigation Bar

This answer讲述了如何设置底部导航栏。

Answer 8

由{em> kandroidj 的public void setupEvenlyDistributedToolbar(){}提出的解决方案非常有效。但是，为了使解决方案更加完善，您需要自定义OnclickListener：

附上我的实现

private void setupOnClickListener4Toolbar(Toolbar toolbar) {
    Menu bottomMenu = toolbar.getMenu();
    for (int i = 0; i < bottomMenu.size(); i++) {
        bottomMenu.getItem(i).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                return onOptionsItemSelected(item);
            }
        });
    }
}

工具栏上的间隔均匀的菜单项

8 个答案: