PopupMenu与图标

Question

当然,我们在这里处理SDK 11及更高版本.

我打算做类似的事情:

旁边的每个项目在PopupMenu,我想将一个图标.

我创建了一个XML文件并将其放入/menu:

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/action_one"
        android:title="Sync"
        android:icon="@android:drawable/ic_popup_sync"
        />

    <item
        android:id="@+id/action_two"
        android:title="About"
        android:icon="@android:drawable/ic_dialog_info"
        />
</menu>

正如您所注意到的,在xml文件中我定义了我想要的图标,但是,当弹出菜单显示时,它显示的是没有图标的图标.我应该怎么做才能出现这两个图标？

Answer 1

这种方式适用于您使用AppCompat v7.它有点hacky但比使用反射明显更好,让你仍然使用核心Android PopupMenu:

PopupMenu menu = new PopupMenu(getContext(), overflowImageView);
menu.inflate(R.menu.popup);
menu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { ... });

MenuPopupHelper menuHelper = new MenuPopupHelper(getContext(), (MenuBuilder) menu.getMenu(), overflowImageView);
menuHelper.setForceShowIcon(true);
menuHelper.show();

RES /菜单/ popup.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:id="@+id/menu_share_location"
        android:title="@string/share_location"
        android:icon="@drawable/ic_share_black_24dp"/>

</menu>

这会导致弹出菜单使用菜单资源文件中定义的图标:

Answer 2

否则我会实现它:

创建PopUpWindow布局:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/llSortChangePopup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/sort_popup_background"
android:orientation="vertical" >

<TextView
    android:id="@+id/tvDistance"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/distance"
    android:layout_weight="1.0"
    android:layout_marginLeft="20dp"
    android:paddingTop="5dp"
    android:gravity="center_vertical"
    android:textColor="@color/my_darker_gray" />

<ImageView
    android:layout_marginLeft="11dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/sort_popup_devider" 
    android:contentDescription="@drawable/sort_popup_devider"/>

<TextView
    android:id="@+id/tvPriority"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/priority"
    android:layout_weight="1.0"
    android:layout_marginLeft="20dp"
    android:gravity="center_vertical"
    android:clickable="true"
    android:onClick="popupSortOnClick"
    android:textColor="@color/my_black" />


<ImageView
    android:layout_marginLeft="11dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/sort_popup_devider" 
    android:contentDescription="@drawable/sort_popup_devider"/>

<TextView
    android:id="@+id/tvTime"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/time"
    android:layout_weight="1.0"
    android:layout_marginLeft="20dp"
    android:gravity="center_vertical"
    android:clickable="true"
    android:onClick="popupSortOnClick"
    android:textColor="@color/my_black" />

<ImageView
    android:layout_marginLeft="11dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/sort_popup_devider" 
    android:contentDescription="@drawable/sort_popup_devider"/>

<TextView
    android:id="@+id/tvStatus"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/status"
    android:layout_weight="1.0"
    android:layout_marginLeft="20dp"
    android:gravity="center_vertical"
    android:textColor="@color/my_black" 
    android:clickable="true"
    android:onClick="popupSortOnClick"
    android:paddingBottom="10dp"/>

 </LinearLayout>

然后PopUpWindow在你的Activity:创建:

    // The method that displays the popup.
private void showStatusPopup(final Activity context, Point p) {

   // Inflate the popup_layout.xml
   LinearLayout viewGroup = (LinearLayout) context.findViewById(R.id.llStatusChangePopup);
   LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
   View layout = layoutInflater.inflate(R.layout.status_popup_layout, null);

   // Creating the PopupWindow
   changeStatusPopUp = new PopupWindow(context);
   changeStatusPopUp.setContentView(layout);
   changeStatusPopUp.setWidth(LinearLayout.LayoutParams.WRAP_CONTENT);
   changeStatusPopUp.setHeight(LinearLayout.LayoutParams.WRAP_CONTENT);
   changeStatusPopUp.setFocusable(true);

   // Some offset to align the popup a bit to the left, and a bit down, relative to button's position.
   int OFFSET_X = -20;
   int OFFSET_Y = 50;

   //Clear the default translucent background
   changeStatusPopUp.setBackgroundDrawable(new BitmapDrawable());

   // Displaying the popup at the specified location, + offsets.
   changeStatusPopUp.showAtLocation(layout, Gravity.NO_GRAVITY, p.x + OFFSET_X, p.y + OFFSET_Y);
}

最后弹出onClick一个按钮或其他任何东西:

 imTaskStatusButton.setOnClickListener(new OnClickListener() 
        {
            public void onClick(View v) 
            {
                 int[] location = new int[2];
                 currentRowId = position;
                 currentRow = v;    
                 // Get the x, y location and store it in the location[] array
                 // location[0] = x, location[1] = y.
                 v.getLocationOnScreen(location);

                 //Initialize the Point with x, and y positions
                 point = new Point();
                 point.x = location[0];
                 point.y = location[1];
                 showStatusPopup(TasksListActivity.this, point);
            }
        });

很好的例子PopUpWindow:

http://androidresearch.wordpress.com/2012/05/06/how-to-create-popups-in-android/

Answer 3

Android弹出菜单有一个隐藏方法来显示菜单图标.使用Java反射将其启用如下面的代码段.

public static void setForceShowIcon(PopupMenu popupMenu) {
    try {
        Field[] fields = popupMenu.getClass().getDeclaredFields();
        for (Field field : fields) {
            if ("mPopup".equals(field.getName())) {
                field.setAccessible(true);
                Object menuPopupHelper = field.get(popupMenu);
                Class<?> classPopupHelper = Class.forName(menuPopupHelper
                        .getClass().getName());
                Method setForceIcons = classPopupHelper.getMethod(
                        "setForceShowIcon", boolean.class);
                setForceIcons.invoke(menuPopupHelper, true);
                break;
            }
        }
    } catch (Throwable e) {
        e.printStackTrace();
    }
}

Answer 4

弹出菜单与图标使用MenuBuilder和MenuPopupHelper

    MenuBuilder menuBuilder =new MenuBuilder(this);
    MenuInflater inflater = new MenuInflater(this);
    inflater.inflate(R.menu.menu, menuBuilder);
    MenuPopupHelper optionsMenu = new MenuPopupHelper(this, menuBuilder, view);
    optionsMenu.setForceShowIcon(true);

    // Set Item Click Listener
    menuBuilder.setCallback(new MenuBuilder.Callback() {
        @Override
        public boolean onMenuItemSelected(MenuBuilder menu, MenuItem item) {
            switch (item.getItemId()) {
                case R.id.opt1: // Handle option1 Click
                    return true;
                case R.id.opt2: // Handle option2 Click
                    return true;
                default:
                    return false;
            }
        }

        @Override
        public void onMenuModeChange(MenuBuilder menu) {}
    });


    // Display the menu
    optionsMenu.show();

menu.xml文件

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/opt1"
        android:icon="@mipmap/ic_launcher"
        android:title="option 1" />
    <item
        android:id="@+id/opt2"
        android:icon="@mipmap/ic_launcher"
        android:title="option 2" />
</menu>

Answer 5

将MenuPopupHelper在程序兼容性类有@hide注释.如果这是一个问题,或者由于某种原因你不能使用AppCompat,那么Spannable在MenuItem标题中使用包含图标和标题文本的另一个解决方案.

主要步骤是:

• PopupMenu使用menuxml文件充气
• 如果任何项目有图标,则对所有项目执行此操作:
  • 如果项目没有图标,请创建透明图标.这样可以确保没有图标的项目与带图标的项目对齐
  • 创建一个SpannableStringBuilder包含图标和标题
  • 将菜单项的标题设置为 SpannableStringBuilder
  • 将菜单项的图标设置为null,"以防万一"

优点:没有反思.不使用任何隐藏的api.可以使用框架PopupMenu.

缺点:更多代码.如果你有一个没有图标的子菜单,它会在小屏幕上有不需要的左边填充.

细节:

首先,为dimens.xml文件中的图标定义大小:

<dimen name="menu_item_icon_size">24dp</dimen>

然后,一些方法将xml中定义的图标移动到标题中:

/**
 * Moves icons from the PopupMenu's MenuItems' icon fields into the menu title as a Spannable with the icon and title text.
 */
public static void insertMenuItemIcons(Context context, PopupMenu popupMenu) {
    Menu menu = popupMenu.getMenu();
    if (hasIcon(menu)) {
        for (int i = 0; i < menu.size(); i++) {
            insertMenuItemIcon(context, menu.getItem(i));
        }
    }
}

/**
 * @return true if the menu has at least one MenuItem with an icon.
 */
private static boolean hasIcon(Menu menu) {
    for (int i = 0; i < menu.size(); i++) {
        if (menu.getItem(i).getIcon() != null) return true;
    }
    return false;
}

/**
 * Converts the given MenuItem's title into a Spannable containing both its icon and title.
 */
private static void insertMenuItemIcon(Context context, MenuItem menuItem) {
    Drawable icon = menuItem.getIcon();

    // If there's no icon, we insert a transparent one to keep the title aligned with the items
    // which do have icons.
    if (icon == null) icon = new ColorDrawable(Color.TRANSPARENT);

    int iconSize = context.getResources().getDimensionPixelSize(R.dimen.menu_item_icon_size);
    icon.setBounds(0, 0, iconSize, iconSize);
    ImageSpan imageSpan = new ImageSpan(icon);

    // Add a space placeholder for the icon, before the title.
    SpannableStringBuilder ssb = new SpannableStringBuilder("       " + menuItem.getTitle());

    // Replace the space placeholder with the icon.
    ssb.setSpan(imageSpan, 1, 2, 0);
    menuItem.setTitle(ssb);
    // Set the icon to null just in case, on some weird devices, they've customized Android to display
    // the icon in the menu... we don't want two icons to appear.
    menuItem.setIcon(null);
}

最后,创建PopupMenu并在显示之前使用上述方法:

PopupMenu popupMenu = new PopupMenu(view.getContext(), view);
popupMenu.inflate(R.menu.popup_menu);
insertMenuItemIcons(textView.getContext(), popupMenu);
popupMenu.show();

截图:

Answer 6

您可以通过使用Reflection来实现此功能，如果您不喜欢此出色的java高级功能，则可以修改在JVM中运行的应用程序的运行时行为，您可以查看对象并在运行时执行其方法在我们的例子中，我们需要在运行时修改popupMenu的行为，而不是扩展核心类并对其进行修改;）希望有所帮助

private void showPopupMenu(View view) {
    // inflate menu
    PopupMenu popup = new PopupMenu(mcontext, view);
    MenuInflater inflater = popup.getMenuInflater();
    inflater.inflate(R.menu.main, popup.getMenu());

    Object menuHelper;
    Class[] argTypes;
    try {
        Field fMenuHelper = PopupMenu.class.getDeclaredField("mPopup");
        fMenuHelper.setAccessible(true);
        menuHelper = fMenuHelper.get(popup);
        argTypes = new Class[]{boolean.class};
        menuHelper.getClass().getDeclaredMethod("setForceShowIcon", argTypes).invoke(menuHelper, true);
    } catch (Exception e) {

    }
    popup.show();




} 

Answer 7

阅读PopupMenu源代码.我们可以通过以下代码显示图标:

Field field = popupMenu.getClass().getDeclaredField("mPopup");
field.setAccessible(true);
MenuPopupHelper menuPopupHelper = (MenuPopupHelper) field.get(popupMenu);
menuPopupHelper.setForceShowIcon(true);

但MenuPopupHelper.java是在android内部包中.所以我们应该使用Reflection:

    PopupMenu popupMenu = new PopupMenu(this, anchor);
    popupMenu.getMenuInflater().inflate(R.menu.process, popupMenu.getMenu());

    try {
        Field field = popupMenu.getClass().getDeclaredField("mPopup");
        field.setAccessible(true);
        Object menuPopupHelper = field.get(popupMenu);
        Class<?> cls = Class.forName("com.android.internal.view.menu.MenuPopupHelper");
        Method method = cls.getDeclaredMethod("setForceShowIcon", new Class[]{boolean.class});
        method.setAccessible(true);
        method.invoke(menuPopupHelper, new Object[]{true});
    } catch (Exception e) {
        e.printStackTrace();
    }

    popupMenu.show();

Answer 8

/ res/menu目录中的list_item_menu.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/locale"
                android:title="Localizar"
                android:icon="@mipmap/ic_en_farmacia_ico"
                app:showAsAction="always">
            </item>

            <item android:id="@+id/delete"
                android:title="Eliminar"
                android:icon="@mipmap/ic_eliminar_ico"
                app:showAsAction="always">
            </item>
    </menu>

在我的活动中

private void showPopupOption(View v){
    PopupMenu popup = new PopupMenu(getContext(), v);
    popup.getMenuInflater().inflate(R.menu.list_item_menu, popup.getMenu());

    popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
        public boolean onMenuItemClick(MenuItem menu_item) {
            switch (menu_item.getItemId()) {
                case R.id.locale:
                    break;
                case R.id.delete:
                    break;
            }
            return true;
        }
    });

    MenuPopupHelper menuHelper = new MenuPopupHelper(getContext(), (MenuBuilder) popup.getMenu(), v);
    menuHelper.setForceShowIcon(true);
    menuHelper.setGravity(Gravity.END);
    menuHelper.show();
}

结果

Answer 9

我用尽可能简单的方式解决了我的问题,从未期待过如此简单:

在main.xml中:

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item
    android:id="@+id/action_more"
    android:icon="@android:drawable/ic_menu_more"
    android:orderInCategory="1"
    android:showAsAction="always"
    android:title="More">
    <menu>
        <item
            android:id="@+id/action_one"
            android:icon="@android:drawable/ic_popup_sync"
            android:title="Sync"/>
        <item
            android:id="@+id/action_two"
            android:icon="@android:drawable/ic_dialog_info"
            android:title="About"/>
    </menu>
</item>

在MainActivity.java中

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

这是一个使用子菜单的技巧

Answer 10

如果您想在弹出菜单中显示图标，请查看https://github.com/shehabic/Droppy，它非常酷且易于使用