我有一个菜单：
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto">
<group
android:id="@+id/nav_items">
<item
android:id="@+id/nav_home"
android:title="Home" />
<item
android:id="@+id/nav_second_home"
android:title="Second host home" />
</group>
</menu>
我想使用我的icon.xml作为项目的图标：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25dp"
android:text="icon1"
android:textColor="@color/black" />
</FrameLayout>
我正在尝试将icon.xml方法中的菜单项图标设置为OnViewCreated，如下所示：
public override void OnViewCreated(View view, Android.OS.Bundle savedInstanceState)
{
base.OnViewCreated(view, savedInstanceState);
var navigationView = view.FindViewById<NavigationView>(Resource.Id.navigation_view);
navigationView.SetNavigationItemSelectedListener(this);
navigationView.Menu.FindItem(Resource.Id.nav_home).SetChecked(true);
var icon = LayoutInflater.Inflate(Resource.Layout.icon, null, false);
icon.Layout(icon.Left, icon.Top, icon.Right, icon.Bottom);
icon.FindViewById<TextView>(Resource.Id.textview).Text = "icon2";
icon.DrawingCacheEnabled = true;
var iconDrawable = new BitmapDrawable(icon.GetDrawingCache(true));
icon.DrawingCacheEnabled = false;
navigationView.Menu.GetItem(0).SetIcon(iconDrawable);
}
但它不起作用。它需要图标所在的空间，但它是空白的。知道为什么吗？我在Xamarin.Android中编写这个应用程序，但它与原生Android相同，所以在任何一个答案中都会受到赞赏！
答案 0 :(得分：0)
您可以尝试这样做：
<item
android:id="@+id/menu_basket_spinner"
android:title="title"
app:actionLayout="@layout/your_layout"/>
答案 1 :(得分：0)
对于带图标的菜单项，首先创建一个JAVA文件（IconizedMenu.java），
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<link href="http://vsss.co.in/assets/css/main.css" rel="stylesheet"/>
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="col-sm-4 col-md-3 wow fadeInUp animated animated" style="visibility: visible; animation-name: fadeInUp; margin-bottom: 15px;">
<div class="products">
<div class="product">
<div class="product-image image_slider">
<div class="image">
<a href="http://vsss.co.in/index.php/Detail/view/84"><img src="http://vsss.co.in/assets/images/No_image.png" alt="" class="slide_active" data-number="0" style="height: 100%; width: auto; max-width: 100%; max-height: 251px; display: inline;">
<div style="position: absolute;bottom:97px; right:0px">
<button class="btn btn-primary icon transparent shopping_cart" data-item="84" data-toggle="dropdown" type="button"> <i class="fa fa-shopping-cart" style="font-size: 22px"></i> </button>
</div>
</a>
</div>
</div>
<div class="product-info text-left">
<h3 class="name"><a href="http://vsss.co.in/index.php/Detail/view/84">2048 TWINKLE POUCH</a></h3>
<h3 class="price"><i class="fa fa-inr" aria-hidden="true"></i>0/-</h3> </div>
<div class="product-cart text-left">
<div class="row">
<div class="col-md-12 Addtocart">
<div style="width:40%;float: left;">
<select>
<option value="11" data-unit_value="1">Pc</option>
</select>
</div>
<div style="width:40%;float: left;">
<input type="text" placeholder="Quantity"> </div>
<div style="width:20%;float: left;">
<button class="btn btn-primary icon transparent" type="button"> OK </button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>只需将此文件用作
即可/**
* Created by PatelD on 04-10-2017.
*/
import android.annotation.SuppressLint;
import android.content.Context;
import android.support.v7.view.SupportMenuInflater;
import android.support.v7.view.menu.MenuBuilder;
import android.support.v7.view.menu.MenuPopupHelper;
import android.support.v7.view.menu.MenuPresenter;
import android.support.v7.view.menu.SubMenuBuilder;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
public class IconizedMenu implements MenuBuilder.Callback, MenuPresenter.Callback {
private Context mContext;
private MenuBuilder mMenu;
private View mAnchor;
private MenuPopupHelper mPopup;
private OnMenuItemClickListener mMenuItemClickListener;
private OnDismissListener mDismissListener;
/**
* Callback interface used to notify the application that the menu has closed.
*/
public interface OnDismissListener {
/**
* Called when the associated menu has been dismissed.
*
* @param menu The PopupMenu that was dismissed.
*/
public void onDismiss(IconizedMenu menu);
}
/**
* Construct a new PopupMenu.
*
* @param context Context for the PopupMenu.
* @param anchor Anchor view for this popup. The popup will appear below the anchor if there
* is room, or above it if there is not.
*/
@SuppressLint("RestrictedApi")
public IconizedMenu(Context context, View anchor) {
mContext = context;
mMenu = new MenuBuilder(context);
mMenu.setCallback(this);
mAnchor = anchor;
mPopup = new MenuPopupHelper(context, mMenu, anchor);
mMenu.setCallback(this);
mPopup.setForceShowIcon(true);
}
/**
* @return the {@link android.view.Menu} associated with this popup. Populate the returned Menu with
* items before calling {@link #show()}.
* @see #show()
* @see #getMenuInflater()
*/
public Menu getMenu() {
return mMenu;
}
/**
* @return a {@link android.view.MenuInflater} that can be used to inflate menu items from XML into the
* menu returned by {@link #getMenu()}.
* @see #getMenu()
*/
@SuppressLint("RestrictedApi")
public MenuInflater getMenuInflater() {
return new SupportMenuInflater(mContext);
}
/**
* Inflate a menu resource into this PopupMenu. This is equivalent to calling
* popupMenu.getMenuInflater().inflate(menuRes, popupMenu.getMenu()).
*
* @param menuRes Menu resource to inflate
*/
public void inflate(int menuRes) {
getMenuInflater().inflate(menuRes, mMenu);
}
/**
* Show the menu popup anchored to the view specified during construction.
*
* @see #dismiss()
*/
@SuppressLint("RestrictedApi")
public void show() {
mPopup.show();
}
/**
* Dismiss the menu popup.
*
* @see #show()
*/
@SuppressLint("RestrictedApi")
public void dismiss() {
mPopup.dismiss();
}
/**
* Set a listener that will be notified when the user selects an item from the menu.
*
* @param listener Listener to notify
*/
public void setOnMenuItemClickListener(OnMenuItemClickListener listener) {
mMenuItemClickListener = listener;
}
/**
* Set a listener that will be notified when this menu is dismissed.
*
* @param listener Listener to notify
*/
public void setOnDismissListener(OnDismissListener listener) {
mDismissListener = listener;
}
/**
* @hide
*/
public boolean onMenuItemSelected(MenuBuilder menu, MenuItem item) {
if (mMenuItemClickListener != null) {
return mMenuItemClickListener.onMenuItemClick(item);
}
return false;
}
/**
* @hide
*/
public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) {
if (mDismissListener != null) {
mDismissListener.onDismiss(this);
}
}
/**
* @hide
*/
@SuppressLint("RestrictedApi")
public boolean onOpenSubMenu(MenuBuilder subMenu) {
if (subMenu == null) return false;
if (!subMenu.hasVisibleItems()) {
return true;
}
// Current menu will be dismissed by the normal helper, submenu will be shown in its place.
new MenuPopupHelper(mContext, subMenu, mAnchor).show();
return true;
}
/**
* @hide
*/
public void onCloseSubMenu(SubMenuBuilder menu) {
}
/**
* @hide
*/
public void onMenuModeChange(MenuBuilder menu) {
}
/**
* Interface responsible for receiving menu item click events if the items themselves
* do not have individual item click listeners.
*/
public interface OnMenuItemClickListener {
/**
* This method will be invoked when a menu item is clicked if the item itself did
* not already handle the event.
*
* @param item {@link MenuItem} that was clicked
* @return <code>true</code> if the event was handled, <code>false</code> otherwise.
*/
public boolean onMenuItemClick(MenuItem item);
}
}
pop_up.xml
IconizedMenu popup = new IconizedMenu(MainActivity.this, view);
MenuInflater inflater = popup.getMenuInflater();
inflater.inflate(R.menu.pop_up, popup.getMenu());
popup.setOnMenuItemClickListener(new IconizedMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
Toast.makeText(MainActivity.this, item.getTitle().toString(), Toast.LENGTH_SHORT).show();
return false;
}
});
popup.show();//showing popup menu