Android ActionBar完全解析，使用官方推荐的最佳导航栏(下)

转载：http://blog.csdn.net/guolin_blog/article/details/25466665

本篇文章主要内容来自于Android Doc，我翻译之后又做了些加工，英文好的朋友也可以直接去读原文。

http://developer.android.com/guide/topics/ui/actionbar.html

限于篇幅的原因，在上篇文章中我们只学习了ActionBar基础部分的知识，那么本篇文章我们将接着上一章的内容继续学习，探究一下ActionBar更加高级的知识。如果你还没有看过前面一篇文章的话，建议先去阅读Android ActionBar完全解析，使用官方推荐的最佳导航栏(上)。

添加Action Provider

和Action View有点类似，Action Provider也可以将一个Action按钮替换成一个自定义的布局。但不同的是，Action Provider能够完全控制事件的所有行为，并且还可以在点击的时候显示子菜单。

为了添加一个Action Provider，我们需要在标签中指定一个actionViewClass属性，在里面填入Action Provider的完整类名。我们可以通过继承ActionProvider类的方式来创建一个自己的Action Provider，同时，Android也提供好了几个内置的Action Provider，比如说ShareActionProvider。

由于每个Action Provider都可以自由地控制事件响应，所以它们不需要在onOptionsItemSelected()方法中再去监听点击事件，而是应该在onPerformDefaultAction()方法中去执行相应的逻辑。

那么我们就先来看一下ShareActionProvider的简单用法吧，编辑menu资源文件，在里面加入ShareActionProvider的声明，如下所示：

**[html]** [view plain](http://blog.csdn.net/guolin_blog/article/details/25466665#)[copy](http://blog.csdn.net/guolin_blog/article/details/25466665#)[![在CODE上查看代码片](https://code.csdn.net/assets/CODE_ico.png)](https://code.csdn.net/snippets/398375)[![派生到我的代码片](https://code.csdn.net/assets/ico_fork.svg)](https://code.csdn.net/snippets/398375/fork)

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- <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">menu</span> <span class="attribute" style="color: red;">xmlns:android</span>=<span class="attribute-value" style="color: blue;">&#8220;http://schemas.android.com/apk/res/android&#8221;</span>  </span>

- <span style="color: black;">    <span class="attribute" style="color: red;">xmlns:tools</span>=<span class="attribute-value" style="color: blue;">&#8220;http://schemas.android.com/tools&#8221;</span>  </span>

- <span style="color: black;">    <span class="attribute" style="color: red;">tools:context</span>=<span class="attribute-value" style="color: blue;">&#8220;com.example.actionbartest.MainActivity&#8221;</span> <span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span>  </span>

- <span style="color: black;">        <span class="attribute" style="color: red;">android:id</span>=<span class="attribute-value" style="color: blue;">&#8220;@+id/action_share&#8221;</span>  </span>

- <span style="color: black;">        <span class="attribute" style="color: red;">android:actionProviderClass</span>=<span class="attribute-value" style="color: blue;">&#8220;android.widget.ShareActionProvider&#8221;</span>  </span>

- <span style="color: black;">        <span class="attribute" style="color: red;">android:showAsAction</span>=<span class="attribute-value" style="color: blue;">&#8220;ifRoom&#8221;</span>  </span>

- <span style="color: black;">        <span class="attribute" style="color: red;">android:title</span>=<span class="attribute-value" style="color: blue;">&#8220;@string/action_share&#8221;</span> <span class="tag" style="font-weight: bold; color: #993300;">/></span>  </span>

- <span style="color: black;">    &#8230;&#8230;  </span>

- <span style="color: black;">  </span>

- <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">menu</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>

注意，ShareActionProvider会自己处理它的显示和事件，但我们仍然要记得给它添加一个title，以防止它会在overflow当中出现。

接着剩下的事情就是通过Intent来定义出你想分享哪些东西了，我们只需要在onCreateOptionsMenu()中调用MenuItem的getActionProvider()方法来得到该ShareActionProvider对象，再通过setShareIntent()方法去选择构建出什么样的一个Intent就可以了。代码如下所示：

**[java]** [view plain](http://blog.csdn.net/guolin_blog/article/details/25466665#)[copy](http://blog.csdn.net/guolin_blog/article/details/25466665#)[![在CODE上查看代码片](https://code.csdn.net/assets/CODE_ico.png)](https://code.csdn.net/snippets/398375)[![派生到我的代码片](https://code.csdn.net/assets/ico_fork.svg)](https://code.csdn.net/snippets/398375/fork)

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- <span style="color: black;"><span class="annotation" style="color: #646464;">@Override</span>  </span>

- <span style="color: black;"><span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">boolean</span> onCreateOptionsMenu(Menu menu) {  </span>

- <span style="color: black;">    MenuInflater inflater = getMenuInflater();  </span>

- <span style="color: black;">    inflater.inflate(R.menu.main, menu);  </span>

- <span style="color: black;">    MenuItem shareItem = menu.findItem(R.id.action_share);  </span>

- <span style="color: black;">    ShareActionProvider provider = (ShareActionProvider) shareItem.getActionProvider();  </span>

- <span style="color: black;">    provider.setShareIntent(getDefaultIntent());  </span>

- <span style="color: black;">    &#8230;&#8230;  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">return</span> <span class="keyword" style="font-weight: bold; color: #006699;">super</span>.onCreateOptionsMenu(menu);  </span>

- <span style="color: black;">}  </span>

- <span style="color: black;">  </span>

- <span style="color: black;"><span class="keyword" style="font-weight: bold; color: #006699;">private</span> Intent getDefaultIntent() {  </span>

- <span style="color: black;">    Intent intent = <span class="keyword" style="font-weight: bold; color: #006699;">new</span> Intent(Intent.ACTION_SEND);  </span>

- <span style="color: black;">    intent.setType(<span class="string" style="color: blue;">&#8220;image/*&#8221;</span>);  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">return</span> intent;  </span>

- <span style="color: black;">}  </span>

可以看到，这里我们通过getDefaultIntent()方法来构建了一个Intent，该Intent表示会将所有可以共享图片的程度都列出来。重新运行一下程序，效果如下图所示：

细心的你一定观察到了，这个ShareActionProvider点击之后是可以展开的，有点类似于overflow的效果，这就是Action Provider的子菜单。除了使用ShareActionProvider之外，我们也可以自定义一个Action Provider，比如说如果想要建立一个拥有两项子菜单的Action Provider，就可以这样写：

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- <span style="color: black;"><span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">class</span> MyActionProvider <span class="keyword" style="font-weight: bold; color: #006699;">extends</span> ActionProvider {  </span>

- <span style="color: black;">      </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> MyActionProvider(Context context) {  </span>

- <span style="color: black;">        <span class="keyword" style="font-weight: bold; color: #006699;">super</span>(context);  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="annotation" style="color: #646464;">@Override</span>  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> View onCreateActionView() {  </span>

- <span style="color: black;">        <span class="keyword" style="font-weight: bold; color: #006699;">return</span> <span class="keyword" style="font-weight: bold; color: #006699;">null</span>;  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="annotation" style="color: #646464;">@Override</span>  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">void</span> onPrepareSubMenu(SubMenu subMenu) {  </span>

- <span style="color: black;">        subMenu.clear();  </span>

- <span style="color: black;">        subMenu.add(<span class="string" style="color: blue;">&#8220;sub item 1&#8221;</span>).setIcon(R.drawable.ic_launcher)  </span>

- <span style="color: black;">                .setOnMenuItemClickListener(<span class="keyword" style="font-weight: bold; color: #006699;">new</span> OnMenuItemClickListener() {  </span>

- <span style="color: black;">                    <span class="annotation" style="color: #646464;">@Override</span>  </span>

- <span style="color: black;">                    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">boolean</span> onMenuItemClick(MenuItem item) {  </span>

- <span style="color: black;">                        <span class="keyword" style="font-weight: bold; color: #006699;">return</span> <span class="keyword" style="font-weight: bold; color: #006699;">true</span>;  </span>

- <span style="color: black;">                    }  </span>

- <span style="color: black;">                });  </span>

- <span style="color: black;">        subMenu.add(<span class="string" style="color: blue;">&#8220;sub item 2&#8221;</span>).setIcon(R.drawable.ic_launcher)  </span>

- <span style="color: black;">                .setOnMenuItemClickListener(<span class="keyword" style="font-weight: bold; color: #006699;">new</span> OnMenuItemClickListener() {  </span>

- <span style="color: black;">                    <span class="annotation" style="color: #646464;">@Override</span>  </span>

- <span style="color: black;">                    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">boolean</span> onMenuItemClick(MenuItem item) {  </span>

- <span style="color: black;">                        <span class="keyword" style="font-weight: bold; color: #006699;">return</span> <span class="keyword" style="font-weight: bold; color: #006699;">false</span>;  </span>

- <span style="color: black;">                    }  </span>

- <span style="color: black;">                });  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="annotation" style="color: #646464;">@Override</span>  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">boolean</span> hasSubMenu() {  </span>

- <span style="color: black;">        <span class="keyword" style="font-weight: bold; color: #006699;">return</span> <span class="keyword" style="font-weight: bold; color: #006699;">true</span>;  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">}  </span>

这里我们新建了一个MyActionProvider继承自ActionProvider，为了表示这个Action Provider是有子菜单的，需要重写hasSubMenu()方法并返回true，然后在onPrepareSubMenu通过调用SubMenu的add()方法添加子菜单。

接着修改menu资源，在里面加入MyActionProvider的声明：

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- <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">menu</span> <span class="attribute" style="color: red;">xmlns:android</span>=<span class="attribute-value" style="color: blue;">&#8220;http://schemas.android.com/apk/res/android&#8221;</span>  </span>

- <span style="color: black;">    <span class="attribute" style="color: red;">xmlns:tools</span>=<span class="attribute-value" style="color: blue;">&#8220;http://schemas.android.com/tools&#8221;</span>  </span>

- <span style="color: black;">    <span class="attribute" style="color: red;">tools:context</span>=<span class="attribute-value" style="color: blue;">&#8220;com.example.actionbartest.MainActivity&#8221;</span> <span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span>  </span>

- <span style="color: black;">        <span class="attribute" style="color: red;">android:id</span>=<span class="attribute-value" style="color: blue;">&#8220;@+id/action_share&#8221;</span>  </span>

- <span style="color: black;">        <span class="attribute" style="color: red;">android:actionProviderClass</span>=<span class="attribute-value" style="color: blue;">&#8220;com.example.actionbartest.MyActionProvider&#8221;</span>  </span>

- <span style="color: black;">        <span class="attribute" style="color: red;">android:icon</span>=<span class="attribute-value" style="color: blue;">&#8220;@drawable/ic_launcher&#8221;</span>  </span>

- <span style="color: black;">        <span class="attribute" style="color: red;">android:showAsAction</span>=<span class="attribute-value" style="color: blue;">&#8220;ifRoom&#8221;</span>  </span>

- <span style="color: black;">        <span class="attribute" style="color: red;">android:title</span>=<span class="attribute-value" style="color: blue;">&#8220;@string/action_share&#8221;</span> <span class="tag" style="font-weight: bold; color: #993300;">/></span>  </span>

- <span style="color: black;">    &#8230;&#8230;  </span>

- <span style="color: black;">  </span>

- <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">menu</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>

现在重新运行一下代码，结果如图所示：

添加导航Tabs

Tabs的应用可以算是非常广泛了，它可以使得用户非常轻松地在你的应用程序中切换不同的视图。而Android官方更加推荐使用ActionBar中提供的Tabs功能，因为它更加的智能，可以自动适配各种屏幕的大小。比如说，在平板上屏幕的空间非常充足，Tabs会和Action按钮在同一行显示，如下图所示：

而如果是在手机上，屏幕的空间不够大的话，Tabs和Action按钮则会分为两行显示，如下图所示：

下面我们就来看一下如何使用ActionBar提供的Tab功能，大致可以分为以下几步：

实现ActionBar.TabListener接口，这个接口提供了Tab事件的各种回调，比如当用户点击了一个Tab时，你就可以进行切换Tab的操作。

2.为每一个你想添加的Tab创建一个ActionBar.Tab的实例，并且调用setTabListener()方法来设置ActionBar.TabListener。除此之外，还需要调用setText()方法来给当前Tab设置标题。

3.最后调用ActionBar的addTab()方法将创建好的Tab添加到ActionBar中。

看起来并不复杂，总共就只有三步，那么我们现在就来尝试一下吧。首先第一步需要创建一个实现ActionBar.TabListener接口的类，代码如下所示：

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- <span style="color: black;"><span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">class</span> TabListener<T <span class="keyword" style="font-weight: bold; color: #006699;">extends</span> Fragment> <span class="keyword" style="font-weight: bold; color: #006699;">implements</span> ActionBar.TabListener {  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">private</span> Fragment mFragment;  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">private</span> <span class="keyword" style="font-weight: bold; color: #006699;">final</span> Activity mActivity;  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">private</span> <span class="keyword" style="font-weight: bold; color: #006699;">final</span> String mTag;  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">private</span> <span class="keyword" style="font-weight: bold; color: #006699;">final</span> Class<T> mClass;  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> TabListener(Activity activity, String tag, Class<T> clz) {  </span>

- <span style="color: black;">        mActivity = activity;  </span>

- <span style="color: black;">        mTag = tag;  </span>

- <span style="color: black;">        mClass = clz;  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">void</span> onTabSelected(Tab tab, FragmentTransaction ft) {  </span>

- <span style="color: black;">        <span class="keyword" style="font-weight: bold; color: #006699;">if</span> (mFragment == <span class="keyword" style="font-weight: bold; color: #006699;">null</span>) {  </span>

- <span style="color: black;">            mFragment = Fragment.instantiate(mActivity, mClass.getName());  </span>

- <span style="color: black;">            ft.add(android.R.id.content, mFragment, mTag);  </span>

- <span style="color: black;">        } <span class="keyword" style="font-weight: bold; color: #006699;">else</span> {  </span>

- <span style="color: black;">            ft.attach(mFragment);  </span>

- <span style="color: black;">        }  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">void</span> onTabUnselected(Tab tab, FragmentTransaction ft) {  </span>

- <span style="color: black;">        <span class="keyword" style="font-weight: bold; color: #006699;">if</span> (mFragment != <span class="keyword" style="font-weight: bold; color: #006699;">null</span>) {  </span>

- <span style="color: black;">            ft.detach(mFragment);  </span>

- <span style="color: black;">        }  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">void</span> onTabReselected(Tab tab, FragmentTransaction ft) {  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">}  </span>

这段代码并不长，我们简单分析一下。当Tab被选中的时候会调用onTabSelected()方法，在这里我们先判断mFragment是否为空，如果为空的话就创建Fragment的实例并调用FragmentTransaction的add()方法，如果不会空的话就调用FragmentTransaction的attach()方法。

而当Tab没有被选中的时候，则调用FragmentTransaction的detach()方法，将UI资源释放掉。

当Tab被重新选中的时候会调用onTabReselected()方法，如果没有特殊需求的话，通常是不需要进行处理的。

接下来第二步要给每一个Tab创建一个ActionBar.Tab的实例，在此之前要先准备好每个Tab页对应的Fragment。比如说这里我们想创建两个Tab页，Artist和Album，那就要先准备好这两个Tab页对应的Fragment。首先新建ArtistFragment，代码如下所示：

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- <span style="color: black;"><span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">class</span> ArtistFragment <span class="keyword" style="font-weight: bold; color: #006699;">extends</span> Fragment {  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">    <span class="annotation" style="color: #646464;">@Override</span>  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> View onCreateView(LayoutInflater inflater, ViewGroup container,  </span>

- <span style="color: black;">            Bundle savedInstanceState) {  </span>

- <span style="color: black;">        TextView textView = <span class="keyword" style="font-weight: bold; color: #006699;">new</span> TextView(getActivity());  </span>

- <span style="color: black;">        textView.setText(<span class="string" style="color: blue;">&#8220;Artist Fragment&#8221;</span>);  </span>

- <span style="color: black;">        textView.setGravity(Gravity.CENTER_HORIZONTAL);  </span>

- <span style="color: black;">        LinearLayout layout = <span class="keyword" style="font-weight: bold; color: #006699;">new</span> LinearLayout(getActivity());  </span>

- <span style="color: black;">        LayoutParams params = <span class="keyword" style="font-weight: bold; color: #006699;">new</span> LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);  </span>

- <span style="color: black;">        layout.addView(textView, params);  </span>

- <span style="color: black;">        <span class="keyword" style="font-weight: bold; color: #006699;">return</span> layout;  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">}  </span>

没有什么实质性的代码，只是在TextView中显示了Artist Fragment这个字符串。

然后如法炮制，新建AlbumFragment，代码如下所示：

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  </div>
</div>

- <span style="color: black;"><span class="keyword" style="font-weight: bold; color: #006699;">public</span> <span class="keyword" style="font-weight: bold; color: #006699;">class</span> AlbumFragment <span class="keyword" style="font-weight: bold; color: #006699;">extends</span> Fragment {  </span>

- <span style="color: black;">      </span>

- <span style="color: black;">    <span class="annotation" style="color: #646464;">@Override</span>  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">public</span> View onCreateView(LayoutInflater inflater, ViewGroup container,  </span>

- <span style="color: black;">            Bundle savedInstanceState) {  </span>

- <span style="color: black;">        TextView textView = <span class="keyword" style="font-weight: bold; color: #006699;">new</span> TextView(getActivity());  </span>

- <span style="color: black;">        textView.setText(<span class="string" style="color: blue;">&#8220;Album Fragment&#8221;</span>);  </span>

- <span style="color: black;">        textView.setGravity(Gravity.CENTER_HORIZONTAL);  </span>

- <span style="color: black;">        LinearLayout layout = <span class="keyword" style="font-weight: bold; color: #006699;">new</span> LinearLayout(getActivity());  </span>

- <span style="color: black;">        LayoutParams params = <span class="keyword" style="font-weight: bold; color: #006699;">new</span> LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);  </span>

- <span style="color: black;">        layout.addView(textView, params);  </span>

- <span style="color: black;">        <span class="keyword" style="font-weight: bold; color: #006699;">return</span> layout;  </span>

- <span style="color: black;">    }  </span>

- <span style="color: black;">  </span>

- <span style="color: black;">}  </span>

Fragment都准备好了之后，接下来就可以开始创建Tab实例了，创建好了之后则再调用addTab()方法添加到ActionBar当中，这两步通常都是在Activity的onCreate()方法中执行的，代码如下：

  <div>
  </div>
</div>

- <span style="color: black;"><span class="annotation" style="color: #646464;">@Override</span>  </span>

- <span style="color: black;"><span class="keyword" style="font-weight: bold; color: #006699;">protected</span> <span class="keyword" style="font-weight: bold; color: #006699;">void</span> onCreate(Bundle savedInstanceState) {  </span>

- <span style="color: black;">    <span class="keyword" style="font-weight: bold; color: #006699;">super</span>.onCreate(savedInstanceState);  </span>

- <span style="color: black;">    setTitle(<span class="string" style="color: blue;">&#8220;天气&#8221;</span>);  </span>

- <span style="color: black;">    ActionBar actionBar = getActionBar();  </span>

- <span style="color: black;">    actionBar.setDisplayHomeAsUpEnabled(<span class="keyword" style="font-weight: bold; color: #006699;">true</span>);  </span>

- <span style="color: black;">    setOverflowShowingAlways();  </span>

- <span style="color: black;">    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);  </span>

- <span style="color: black;">    Tab tab = actionBar  </span>

- <span style="color: black;">            .newTab()  </span>

- <span style="color: black;">            .setText(R.string.artist)  </span>

- <span style="color: black;">            .setTabListener(  </span>

- <span style="color: black;">                    <span class="keyword" style="font-weight: bold; color: #006699;">new</span> TabListener<ArtistFragment>(<span class="keyword" style="font-weight: bold; color: #006699;">this</span>, <span class="string" style="color: blue;">&#8220;artist&#8221;</span>,  </span>

- <span style="color: black;">                            ArtistFragment.<span class="keyword" style="font-weight: bold; color: #006699;">class</span>));  </span>

- <span style="color: black;">    actionBar.addTab(tab);  </span>

- <span style="color: black;">    tab = actionBar  </span>

- <span style="color: black;">            .newTab()  </span>

- <span style="color: black;">            .setText(R.string.album)  </span>

- <span style="color: black;">            .setTabListener(  </span>

- <span style="color: black;">                    <span class="keyword" style="font-weight: bold; color: #006699;">new</span> TabListener<AlbumFragment>(<span class="keyword" style="font-weight: bold; color: #006699;">this</span>, <span class="string" style="color: blue;">&#8220;album&#8221;</span>,  </span>

- <span style="color: black;">                            AlbumFragment.<span class="keyword" style="font-weight: bold; color: #006699;">class</span>));  </span>

- <span style="color: black;">    actionBar.addTab(tab);  </span>

- <span style="color: black;">}  </span>

可以看到，这里是使用连缀的写法来创建Tab的。首先调用ActionBar的newTab()方法来创建一个Tab实例，接着调用了setText()方法来设置标题，然后再调用setTabListener()方法来设置事件监听器，最后再调用ActionBar的addTab()方法将Tab添加到ActionBar中。
好了，这样的话代码就编写完了，重新运行一下程序，效果如下图所示：

自定义ActionBar样式

虽说ActionBar给用户提供了一种全局统一的界面风格和操作方式，但这并不意味着所有应用程序的ActionBar都必须要长得一模一样。如果你需要修改ActionBar的样式来更加好地适配你的应用，可以非常简单地通过Android样式和主题来实现。

其实Android内置的几个Activity主题中就已经包含了”dark”或”light”这样的ActionBar样式了，同时你也可以继承这些主题，然后进行更深一步的定制。

1. 使用主题

Android中有两个最基本的Activity主题可以用于指定ActionBar的颜色，分别是：

- [Theme.Holo](http://developer.android.com/reference/android/R.style.html#Theme_Holo)，这是一个深色系的主题。

- [Theme.Holo.Light](http://developer.android.com/reference/android/R.style.html#Theme_Holo_Light)，这是一个浅色系的主题。

深色系主题样式的效果如下图所示：

![](http://img.blog.csdn.net/20140615142914031)

浅色系主题样式的效果如下图所示：

![](http://img.blog.csdn.net/20140615142937593)

你可以将这些主题应用到你的整个应用程序，也可以只应用于某个Activity。通过在AndroidManifest.xml文件中给或标签指定android:theme属性就可以实现了。比如：

    <div>
    </div>
  </div>
</div>


  - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">application</span> <span class="attribute" style="color: red;">android:theme</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Theme.Holo.Light&#8221;</span> &#8230; <span class="tag" style="font-weight: bold; color: #993300;">/></span>  </span>

如果你只想让ActionBar使用深色系的主题，而Activity的内容部分仍然使用浅色系的主题，可以通过声明[Theme.Holo.Light.DarkActionBar](http://developer.android.com/reference/android/R.style.html#Theme_Holo_Light_DarkActionBar)这个主题来实现，效果如下图所示：</div> 

<div>
  ![](http://img.blog.csdn.net/20140615145219687)
</div>

### <a style="color: #336699;" name="t4"></a>2. 自定义背景

<div>
  如果想要修改ActionBar的背景，我们可以通过创建一个自定义主题并重写actionBarStyle属性来实现。这个属性可以指向另外一个样式，然后我们在这个样式中重写background这个属性就可以指定一个drawable资源或颜色，从而实现自定义背景的功能。
</div>

<div>
  编辑styles.xml文件，在里面加入一个自定义的主题，如下所示：

  
  <div class="dp-highlighter bg_html">
    <div class="bar">
      <div class="tools" style="color: silver;">
        **[html]** [view plain](http://blog.csdn.net/guolin_blog/article/details/25466665#)[copy](http://blog.csdn.net/guolin_blog/article/details/25466665#)[![在CODE上查看代码片](https://code.csdn.net/assets/CODE_ico.png)](https://code.csdn.net/snippets/398375)[![派生到我的代码片](https://code.csdn.net/assets/ico_fork.svg)](https://code.csdn.net/snippets/398375/fork)

        
        <div>
        </div>
      </div>
    </div>
    
    
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;CustomActionBarTheme&#8221;</span> <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Theme.Holo.Light&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:actionBarStyle&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>@style/MyActionBar<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;MyActionBar&#8221;</span> <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Widget.Holo.Light.ActionBar&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:background&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>#f4842d<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
    
  </div>
  
  

    可以看到，这里我们定义了一个CustomActionBarTheme主题，并让它继承自Theme.Holo.Light。然后在其内部重写了actionBarStyle这个属性，然后将这个属性指向了MyActionBar这个样式，我们在这个样式中又重写了background属性，并给它指定了一个背景色。
  

</div>

<div>
  现在重新运行一下程序，效果如下图所示：
</div>

<div>
  ![](http://img.blog.csdn.net/20140615194208062?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ3VvbGluX2Jsb2c=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast)
</div>

<div>
  这样我们就成功修改ActionBar的背景色了。不过现在看上去还有点怪怪的，因为只是ActionBar的背景色改变了，Tabs的背景色还是原来的样子，这样就感觉不太协调。那么下面我们马上就来修改一下Tabs的背景色，编辑styles.xml文件，如下所示：

  
  <div class="dp-highlighter bg_html">
    <div class="bar">
      <div class="tools" style="color: silver;">
        **[html]** [view plain](http://blog.csdn.net/guolin_blog/article/details/25466665#)[copy](http://blog.csdn.net/guolin_blog/article/details/25466665#)[![在CODE上查看代码片](https://code.csdn.net/assets/CODE_ico.png)](https://code.csdn.net/snippets/398375)[![派生到我的代码片](https://code.csdn.net/assets/ico_fork.svg)](https://code.csdn.net/snippets/398375/fork)

        
        <div>
        </div>
      </div>
    </div>
    
    
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;CustomActionBarTheme&#8221;</span> <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Theme.Holo.Light&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:actionBarStyle&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>@style/MyActionBar<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;MyActionBar&#8221;</span> <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Widget.Holo.Light.ActionBar&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:background&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>#f4842d<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:backgroundStacked&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>#d27026<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
    
  </div>
  
  

    可以看到，这里又重写了backgroundStacked属性，这个属性就是用于指定Tabs背景色的。那么再次重新运行程序，效果如下图所示：
  

</div>

<div>
  ![](http://img.blog.csdn.net/20140615195140593?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ3VvbGluX2Jsb2c=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast)
</div>

### <a style="color: #336699;" name="t5"></a>3. 自定义文字颜色

<div>
  现在整个ActionBar的颜色是属于偏暗系的，而ActionBar中文字的颜色又偏偏是黑色的，所以看起来并不舒服，那么接下来我们就学习一下如果自定义文字颜色，将文字颜色改成白色。
</div>

<div>
  修改styles.xml文件，如下所示：

  
  <div class="dp-highlighter bg_html">
    <div class="bar">
      <div class="tools" style="color: silver;">
        **[html]** [view plain](http://blog.csdn.net/guolin_blog/article/details/25466665#)[copy](http://blog.csdn.net/guolin_blog/article/details/25466665#)[![在CODE上查看代码片](https://code.csdn.net/assets/CODE_ico.png)](https://code.csdn.net/snippets/398375)[![派生到我的代码片](https://code.csdn.net/assets/ico_fork.svg)](https://code.csdn.net/snippets/398375/fork)

        
        <div>
        </div>
      </div>
    </div>
    
    
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    &#8230;&#8230;  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;MyActionBar&#8221;</span> <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Widget.Holo.Light.ActionBar&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        &#8230;&#8230;  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:titleTextStyle&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>@style/MyActionBarTitleText<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;MyActionBarTitleText&#8221;</span> <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/TextAppearance.Holo.Widget.ActionBar.Title&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:textColor&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>#fff<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
    
  </div>
  
  

    可以看到，这里在MyActionBar样式里面重写了titleTextStyle属性，并将它指向了另一个自定义样式MyActionBarTitleText，接着我们在这个样式中指定textColor的颜色是#fff，也就是白色。
  

</div>

<div>
  现在重新运行一下程序，结果如下图所示：
</div>

<div>
  ![](http://img.blog.csdn.net/20140615212154453?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ3VvbGluX2Jsb2c=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast)
</div>

<div>
  OK，ActionBar标题文字的颜色已经成功改成白色了，那Tab标题的文字又该怎么修改呢？继续编辑styles.xml文件，如下所示：

  
  <div class="dp-highlighter bg_html">
    <div class="bar">
      <div class="tools" style="color: silver;">
        **[html]** [view plain](http://blog.csdn.net/guolin_blog/article/details/25466665#)[copy](http://blog.csdn.net/guolin_blog/article/details/25466665#)[![在CODE上查看代码片](https://code.csdn.net/assets/CODE_ico.png)](https://code.csdn.net/snippets/398375)[![派生到我的代码片](https://code.csdn.net/assets/ico_fork.svg)](https://code.csdn.net/snippets/398375/fork)

        
        <div>
        </div>
      </div>
    </div>
    
    
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;CustomActionBarTheme&#8221;</span> <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Theme.Holo.Light&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:actionBarStyle&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>@style/MyActionBar<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:actionBarTabTextStyle&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>@style/MyActionBarTabText<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">      </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;MyActionBarTabText&#8221;</span>  </span>
      
      - <span style="color: black;">           <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Widget.Holo.ActionBar.TabText&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:textColor&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>#fff<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
    
  </div>
  
  

    这里我们在CustomActionBarTheme主题中重写actionBarTabTextStyle属性，并将它指向一个新建的MyActionBarTabText样式，然后在这个样式中重写textColor属性，将颜色指定为白色即可。
  

</div>

<div>
  重新运行一下程序，结果如下图所示：
</div>

<div>
  ![](http://img.blog.csdn.net/20140615212924640?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ3VvbGluX2Jsb2c=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast)
</div>

### <a style="color: #336699;" name="t6"></a>4. 自定义Tab Indicator

<div>
  为了可以明确分辨出我们当前选中的是哪一个Tab项，通常情况下都会在选中Tab的下面加上一条横线作为标识，这被称作Tab Indicator。那么上图中的Tab Indicator是蓝色的，明显和整体风格不相符，所以我们接下来就学习一下如何自定义Tab Indicator。
</div>

<div>
  首先我们需要重写actionBarTabStyle这个属性，然后将它指向一个新建的Tab样式，然后重写background这个属性即可。需要注意的是，background必须要指定一个state-list drawable文件，这样在各种不同状态下才能显示出不同的效果。
</div>

<div>
  那么在开始之前，首先我们需要准备四张图片，分别用于表示Tab的四种状态，如下所示：
</div>

<div>
  ![](http://img.blog.csdn.net/20140617222652140)         ![](http://img.blog.csdn.net/20140617222659640)         ![](http://img.blog.csdn.net/20140617222705765)         ![](http://img.blog.csdn.net/20140617222712328)
</div>

<div>
  这四张图片分别表示Tab选中未按下，选中且按下，未选中未按下，未选中且按下这四种状态，那么接着新建res/drawable/actionbar_tab_indicator.xml文件，代码如下所示：

  
  <div class="dp-highlighter bg_html">
    <div class="bar">
      <div class="tools" style="color: silver;">
        **[html]** [view plain](http://blog.csdn.net/guolin_blog/article/details/25466665#)[copy](http://blog.csdn.net/guolin_blog/article/details/25466665#)[![在CODE上查看代码片](https://code.csdn.net/assets/CODE_ico.png)](https://code.csdn.net/snippets/398375)[![派生到我的代码片](https://code.csdn.net/assets/ico_fork.svg)](https://code.csdn.net/snippets/398375/fork)

        
        <div>
        </div>
      </div>
    </div>
    
    
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><?</span><span class="tag-name" style="font-weight: bold; color: #993300;">xml</span> <span class="attribute" style="color: red;">version</span>=<span class="attribute-value" style="color: blue;">&#8220;1.0&#8221;</span> <span class="attribute" style="color: red;">encoding</span>=<span class="attribute-value" style="color: blue;">&#8220;utf-8&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">?></span>  </span>
      
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">selector</span> <span class="attribute" style="color: red;">xmlns:android</span>=<span class="attribute-value" style="color: blue;">&#8220;http://schemas.android.com/apk/res/android&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span>  <span class="attribute" style="color: red;">android:state_selected</span>=<span class="attribute-value" style="color: blue;">&#8220;false&#8221;</span>  </span>
      
      - <span style="color: black;">          <span class="attribute" style="color: red;">android:state_pressed</span>=<span class="attribute-value" style="color: blue;">&#8220;false&#8221;</span>  </span>
      
      - <span style="color: black;">          <span class="attribute" style="color: red;">android:drawable</span>=<span class="attribute-value" style="color: blue;">&#8220;@drawable/tab_unselected&#8221;</span> <span class="tag" style="font-weight: bold; color: #993300;">/></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">android:state_selected</span>=<span class="attribute-value" style="color: blue;">&#8220;true&#8221;</span>  </span>
      
      - <span style="color: black;">          <span class="attribute" style="color: red;">android:state_pressed</span>=<span class="attribute-value" style="color: blue;">&#8220;false&#8221;</span>  </span>
      
      - <span style="color: black;">          <span class="attribute" style="color: red;">android:drawable</span>=<span class="attribute-value" style="color: blue;">&#8220;@drawable/tab_selected&#8221;</span> <span class="tag" style="font-weight: bold; color: #993300;">/></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">android:state_selected</span>=<span class="attribute-value" style="color: blue;">&#8220;false&#8221;</span>  </span>
      
      - <span style="color: black;">          <span class="attribute" style="color: red;">android:state_pressed</span>=<span class="attribute-value" style="color: blue;">&#8220;true&#8221;</span>  </span>
      
      - <span style="color: black;">          <span class="attribute" style="color: red;">android:drawable</span>=<span class="attribute-value" style="color: blue;">&#8220;@drawable/tab_unselected_pressed&#8221;</span> <span class="tag" style="font-weight: bold; color: #993300;">/></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">android:state_selected</span>=<span class="attribute-value" style="color: blue;">&#8220;true&#8221;</span>  </span>
      
      - <span style="color: black;">          <span class="attribute" style="color: red;">android:state_pressed</span>=<span class="attribute-value" style="color: blue;">&#8220;true&#8221;</span>  </span>
      
      - <span style="color: black;">          <span class="attribute" style="color: red;">android:drawable</span>=<span class="attribute-value" style="color: blue;">&#8220;@drawable/tab_selected_pressed&#8221;</span> <span class="tag" style="font-weight: bold; color: #993300;">/></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">selector</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
    
  </div>
  
  

    四种状态分别引用了四张图片，这样就把state-list drawable文件写好了。接着修改style.xml文件，代码如下所示：
  

  
  <div class="dp-highlighter bg_html">
    <div class="bar">
      <div class="tools" style="color: silver;">
        **[html]** [view plain](http://blog.csdn.net/guolin_blog/article/details/25466665#)[copy](http://blog.csdn.net/guolin_blog/article/details/25466665#)[![在CODE上查看代码片](https://code.csdn.net/assets/CODE_ico.png)](https://code.csdn.net/snippets/398375)[![派生到我的代码片](https://code.csdn.net/assets/ico_fork.svg)](https://code.csdn.net/snippets/398375/fork)

        
        <div>
        </div>
      </div>
    </div>
    
    
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;CustomActionBarTheme&#8221;</span> <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Theme.Holo.Light&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        &#8230;&#8230;  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:actionBarTabStyle&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>@style/MyActionBarTabs<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">      </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;MyActionBarTabs&#8221;</span> <span class="attribute" style="color: red;">parent</span>=<span class="attribute-value" style="color: blue;">&#8220;@android:style/Widget.Holo.ActionBar.TabView&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">        <span class="tag" style="font-weight: bold; color: #993300;"><</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span> <span class="attribute" style="color: red;">name</span>=<span class="attribute-value" style="color: blue;">&#8220;android:background&#8221;</span><span class="tag" style="font-weight: bold; color: #993300;">></span>@drawable/actionbar_tab_indicator<span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">item</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">    <span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">style</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
      - <span style="color: black;">  </span>
      
      - <span style="color: black;"><span class="tag" style="font-weight: bold; color: #993300;"></</span><span class="tag-name" style="font-weight: bold; color: #993300;">resources</span><span class="tag" style="font-weight: bold; color: #993300;">></span>  </span>
      
    
  </div>
  
  

    这里先是重写了actionBarTabStyle这个属性，并将它指向了另一个自定义样式MyActionBarTabs，接着在这个样式中重写background属性，然后指向我们刚才创建的actionbar_tab_indicator即可。
  

</div>

<div>
  现在重新运行一下程序，效果如下所示：
</div>

<div>
  ![](http://img.blog.csdn.net/20140617225521062)
</div>

<div>
  可以看到，Tab Indicator的颜色已经变成了白色，这样看上去就协调得多了。
</div>

<div>
  除此之外，Action Bar还有许许多多的属性可以进行自定义，这里我们无法一一涵盖到本篇文章中，更多的自定义属性请参考官方文档进行学习。
</div>

添加Action Provider#

添加导航Tabs#

自定义ActionBar样式#

1. 使用主题#

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添加Action Provider

添加导航Tabs

自定义ActionBar样式

1. 使用主题