android - 无法制作选项菜单..显示为上下文菜单android

Question

我想在 android 中制作选项菜单，但它显示为上下文菜单。这是代码。

@Override
    public boolean onCreateOptionsMenu(Menu menu)
    {

     menu.add("Item1");
     menu.add("Item2");

     return true;
    }

谁能帮我理解它显示为上下文菜单。谢谢

Answer 1

尝试这个

public static final int ADD_CATEGORY_INDEX1 = Menu.FIRST;
public static final int ADD_CATEGORY_INDEX2 = Menu.FIRST+1;

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);

         menu.add(0, ADD_CATEGORY_INDEX1, 0, "item1"); 
         menu.add(0, ADD_CATEGORY_INDEX2, 0, "item2"); 

    return super.onCreateOptionsMenu(menu);
}

Answer 2

如果要创建菜单，请执行以下操作：

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = this.getMenuInflater();
    inflater.inflate(R.layout.menu, menu);
    return true;
}

它显示为上下文菜单，因为您没有为菜单设置布局，并且您没有对其进行膨胀。使用提供的代码，以及与此类似的 XML 代码：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Menu button - Home -->
<item 
    android:id="@+id/homeButton"
    android:icon="@drawable/homeicon"
    android:title="@string/homeButton"
    android:textSize="10sp"
    />
<!-- Menu button - Location -->
 <item 
    android:id="@+id/locationButton"
    android:icon="@drawable/locbutton"
    android:title="@string/locationButton"
    android:textSize="10sp"
    />
 <!-- Menu button - Dining -->
  <item 
    android:id="@+id/diningButton"
    android:icon="@drawable/diningbutton"
    android:title="@string/diningButton"
    android:textSize="10sp"
    />
  <!-- Menu button - Top25 -->
   <item 
    android:id="@+id/topXXVButton"
    android:icon="@drawable/topxxv"
    android:title="@string/topXXVButton"
    android:textSize="10sp"
    />

所有这一切都应该让你前进。

希望能帮助到你！

Answer 3

试试这个方法：

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.layout.device_menu, menu);
    setMenuBackground();
    return true;
  }

  private void setMenuBackground() {
    getLayoutInflater().setFactory(new LayoutInflater.Factory() {
        public View onCreateView(final String name,final Context context,final AttributeSet attributeSet) {

            if (name.equalsIgnoreCase("com.android.internal.view.menu.IconMenuItemView")) {  
                try {
                    final LayoutInflater f = getLayoutInflater();
                    final View view = f.createView(name, null, attributeSet);
                    //view.setBackgroundResource(R.drawable.menu_selector);

                    new Handler().post(new Runnable() {
                        public void run() {
                           view.setBackgroundResource(R.drawable.menu_selector);               
                        }
                    });
                    return view;
                } catch (final Exception e) {
                    Log.e("##Menu##","Could not create a custom view for menu: "+ e.getMessage(), e);                                                                           
                }
            }
            return null;
        }
    });
}

@Override
public View onCreateView(String name, Context context,
        AttributeSet attrs) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.menuItem1:
        //code for first menu item click     
             break;
        case R.id.menuItem2:
            //code for second menu item click      
             break;
    }
    return true;
}

这是 menu_selector.xml（在可绘制文件夹中）：

   <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:drawable="@color/menu_pressed"/>
    <item android:state_focused="true" android:drawable="@color/menu_focused"/>
    <item android:drawable="@color/menu_normal"/>
</selector>

这是 device_menu.xml（在布局文件夹中）：

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

    <item android:id="@+id/menuItem1"
        android:icon="@drawable/icon_for_item_1"
        android:title="Item1" />
    <item android:id="@+id/menuItem2"
       android:icon="@drawable/icon_for_item_2"
       android:title="Item2" />

   </menu>

这是colors.xml（在“res”文件夹的“values”文件夹中）：

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

             <color name="menu_normal">#ff222222</color>
             <color name="menu_focused">#ff444444</color>
             <color name="menu_pressed">#ffcccccc</color>

       </resources>