Android之ActionBar(二)

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鹰击天风壮，鹏飞海浪春。

本讲内容：ActionBar

示例一：

下面是res/menu/main.xml  文件：

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="com.example.weixindemo.MainActivity" >

    <item
        android:id="@+id/action_search"
        android:actionViewClass="android.widget.SearchView"
        android:icon="@drawable/actionbar_search_icon"
        android:showAsAction="ifRoom|collapseActionView"
        android:title="@string/action_search"/>
    <item
        android:id="@+id/action_plus"
        android:actionProviderClass="com.example.weixindemo.PlusActionProvider"
        android:icon="@drawable/actionbar_add_icon"
        android:showAsAction="ifRoom"
        android:title="@string/action_plus"/>
    <item
        android:id="@+id/action_album"
        android:icon="@drawable/ofm_photo_icon"
        android:title="@string/action_album"/>
    <item
        android:id="@+id/action_collection"
        android:icon="@drawable/ofm_collect_icon"
        android:title="@string/action_collection"/>
    <item
        android:id="@+id/action_card"
        android:icon="@drawable/ofm_card_icon"
        android:title="@string/action_card"/>
    <item
        android:id="@+id/action_settings"
        android:icon="@drawable/ofm_setting_icon"
        android:title="@string/action_settings"/>
    <item
        android:id="@+id/action_feed"
        android:icon="@drawable/ofm_feedback_icon"
        android:title="@string/action_feed"/>

</menu>

public class PlusActionProvider extends ActionProvider {
	private Context context;

	public PlusActionProvider(Context context) {
		super(context);
		this.context = context;
	}

	public View onCreateActionView() {
		return null;
	}

	public void onPrepareSubMenu(SubMenu subMenu) {
		subMenu.clear();
		subMenu.add(context.getString(R.string.plus_group_chat))
				.setIcon(R.drawable.ofm_group_chat_icon)
				.setOnMenuItemClickListener(new OnMenuItemClickListener() {
					public boolean onMenuItemClick(MenuItem item) {
						return true;
					}
				});
		subMenu.add(context.getString(R.string.plus_add_friend))
				.setIcon(R.drawable.ofm_add_icon)
				.setOnMenuItemClickListener(new OnMenuItemClickListener() {
					@Override
					public boolean onMenuItemClick(MenuItem item) {
						return false;
					}
				});
		subMenu.add(context.getString(R.string.plus_video_chat))
				.setIcon(R.drawable.ofm_video_icon)
				.setOnMenuItemClickListener(new OnMenuItemClickListener() {
					@Override
					public boolean onMenuItemClick(MenuItem item) {
						return false;
					}
				});
		subMenu.add(context.getString(R.string.plus_scan))
				.setIcon(R.drawable.ofm_qrcode_icon)
				.setOnMenuItemClickListener(new OnMenuItemClickListener() {
					@Override
					public boolean onMenuItemClick(MenuItem item) {
						return false;
					}
				});
		subMenu.add(context.getString(R.string.plus_take_photo))
				.setIcon(R.drawable.ofm_camera_icon)
				.setOnMenuItemClickListener(new OnMenuItemClickListener() {
					@Override
					public boolean onMenuItemClick(MenuItem item) {
						return false;
					}
				});
	}
	
	public boolean hasSubMenu() {
		return true;
	}
}

public class MainActivity extends Activity {

	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		setOverflowShow();
	}

	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	/**
	 * 设置Overflow中的选项显示图标
	 */
	public boolean onMenuOpened(int featureId, Menu menu) {
		if (featureId == Window.FEATURE_ACTION_BAR && menu != null) {
			if (menu.getClass().getSimpleName().equals("MenuBuilder")) {
				try {
					Method m = menu.getClass().getDeclaredMethod(
							"setOptionalIconsVisible", Boolean.TYPE);
					m.setAccessible(true);
					m.invoke(menu, true);
				} catch (Exception e) {
				}
			}
		}
		return super.onMenuOpened(featureId, menu);
	}

	/**
	 * 设置Overflow按钮总是显示
	 */
	private void setOverflowShow() {
		try {
			ViewConfiguration config = ViewConfiguration.get(this);
			Field menuKeyField = ViewConfiguration.class
					.getDeclaredField("sHasPermanentMenuKey");
			menuKeyField.setAccessible(true);
			menuKeyField.setBoolean(config, false);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}

 <style name="CustomActionBarTheme" parent="@android:style/Theme.Holo.Light">
        <item name="android:actionBarStyle">@style/MyActionBar</item>
        <item name="android:itemTextAppearance">@style/MyActionBarOverflow</item>
        <item name="android:actionOverflowButtonStyle">@style/MyActionButtonOverflow</item>
        <item name="android:itemBackground">@drawable/actionbar_bg_selector</item><!-- 子菜单背景色 -->
      <!--   <item name="android:actionBarItemBackground">@drawable/actionbar_bg_selector</item>  显示按钮背景色 -->
    </style>

    <style name="MyActionBar" parent="@android:style/Widget.Holo.ActionBar">
        <item name="android:background">#f4842d</item>
        <item name="android:titleTextStyle">@style/MyActionBarTitleText</item>
    </style>

    <style name="MyActionBarTitleText" parent="@android:style/TextAppearance.Holo.Widget.ActionBar.Title">  
        <item name="android:textColor">#cfcfcf</item>  
        <item name="android:textSize">17sp</item>  
    </style> 

    <style name="MyActionBarOverflow" parent="@android:style/Widget.ActionButton.Overflow">
        <item name="android:textSize">16sp</item>
        <item name="android:textColor">#cfcfcf</item>  
        <!-- 菜单里面的文字 -->
    </style>

    <style name="MyActionButtonOverflow" parent="android:style/Widget.Holo.ActionButton.Overflow">
        <item name="android:src">@drawable/actionbar_more_icon</item>
        <!-- 更改overflow按钮图标 -->
    </style>

<application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:logo="@drawable/logo"
        android:theme="@style/CustomActionBarTheme" >

Take your time and enjoy it 

Android之ActionBar(二)

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原文地址：http://blog.csdn.net/liguojin1230/article/details/46546579