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来源：互联网发布：安卓即时通讯源码编辑：程序博客网时间：2024/04/30 11:04

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<title>深入剖析Android四大组件(九)——Activity之AppCompatActivity与toolbar的结合 - CSDN博客</title>

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<h1 class="csdn_top">深入剖析Android四大组件(九)——Activity之AppCompatActivity与toolbar的结合</h1>

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<p><span style="font-size:18px;">对于技术类的博客，我们永远追寻最新API脚步，在API22之前我们使用标题栏基本都是在ActionBarActivity的Activity中处理的，而API22之后，谷歌遗弃了ActionBarActivity，推荐我们也可以说是强制我们使用AppCompatActivity。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">然而ActionBarActivity与AppCompatActivity的使用大同小异，下面我们将介绍最新的Activity组件之AppCompatActivity的使用。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">最后的效果与微信基本相同，图如下：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" src="http://img.blog.csdn.net/20151225194123295?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt=""></span></p><p><span style="font-size:18px;"><br></span></p><h1><a name="t0"></a>1.初探AppCompatActivity</h1><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">我们按照AndroidStudio的默认顺序创建项目，默认Activity继承自AppCompatActivity。代码如下：</span></p><p><span style="font-size:18px;"><br></span></p><span style="font-size:18px;"></span><pre style="color: rgb(169, 183, 198); font-family: '宋体'; font-size: 9pt; background-color: rgb(43, 43, 43);"><span style="color:#cc7832;">public class </span>MainActivity <span style="color:#cc7832;">extends </span>AppCompatActivity {

<span style="color:#bbb529;">@Override

</span><span style="color:#bbb529;"> </span><span style="color:#cc7832;">protected void </span><span style="color:#ffc66d;">onCreate</span>(Bundle savedInstanceState) {

<span style="color:#cc7832;">super</span>.onCreate(savedInstanceState)<span style="color:#cc7832;">;

</span><span style="color:#cc7832;"> </span>setContentView(R.layout.<span style="color:#9876aa;font-style: italic;">activity_main</span>)<span style="color:#cc7832;">;

</span><span style="color:#cc7832;"> </span>}

}</pre><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">运行提到如下所示的界面：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" alt="" src="http://img.blog.csdn.net/20151225124445273?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center"></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">其结果与继承自Activity并无二致，丑爆了。下面我们来一步一步扩展其标题栏，让他的内容更丰富多彩。</span></p><p><span style="font-size:18px;"><br></span></p><h1><a name="t1"></a>2.AppCompatActivity与Toolbar结合</h1><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">其实我们并不是要使用AppCompatActivity自带的标题栏，那样扩展会很麻烦，在14年的Android 5.0的时候就用Toolbar替代了ActionBar,而ActionBarActivity又被AppCompatActivity替代，那么使用方法就是引入Toolbar设置到Activity中。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">㈠首先我们必须在配置文件中，写入Toolbar，代码如下：</span></p><p><span style="font-size:18px;"><br></span></p><span style="font-size:18px;"></span><pre style="color: rgb(169, 183, 198); font-family: '宋体'; font-size: 9pt; background-color: rgb(43, 43, 43);"><span style="color:#e8bf6a;"><android.support.v7.widget.Toolbar

</span><span style="color:#e8bf6a;"> </span><span style="color:#9876aa;">android</span><span style="color:#bababa;">:id=</span><span style="color:#a5c261;">"@+id/activity_main_toolbar"

</span><span style="color:#a5c261;"> </span><span style="color:#9876aa;">android</span><span style="color:#bababa;">:layout_height=</span><span style="color:#a5c261;">"wrap_content"

</span><span style="color:#a5c261;"> </span><span style="color:#9876aa;">android</span><span style="color:#bababa;">:layout_width=</span><span style="color:#a5c261;">"match_parent"

</span><span style="color:#a5c261;"> </span><span style="color:#9876aa;">android</span><span style="color:#bababa;">:minHeight=</span><span style="color:#a5c261;">"?attr/actionBarSize"

</span><span style="color:#a5c261;"> </span><span style="color:#9876aa;">android</span><span style="color:#bababa;">:background=</span><span style="color:#a5c261;">"?attr/colorPrimary"</span><span style="color:#e8bf6a;">>

</span><span style="color:#e8bf6a;">

</span><span style="color:#e8bf6a;"></android.support.v7.widget.Toolbar></span></pre><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">解释①android:minHeight="?attr/actionBarSize"：设置标题栏最小高度为ActionBar的高度。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">解释②android:background="?attr/colorPrimary"：该主题下的主色。也就是默认的灰色。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">我们知道在AndroidManifest.xml清单文件下application中设置了android:theme="@style/AppTheme"而查看AppTheme看到如下样式</span></p><p><span style="font-size:18px;"><br></span></p><span style="font-size:18px;"></span><pre style="color: rgb(169, 183, 198); font-family: '宋体'; font-size: 9pt; background-color: rgb(43, 43, 43);"><span style="color:#e8bf6a;"><</span><span style="color:#e8bf6a;background-color: rgb(52, 65, 52);">resources</span><span style="color:#e8bf6a;">>

</span><span style="color:#e8bf6a;"> </span><span style="color:#808080;font-style: italic;">

</span><span style="color:#808080;font-style: italic;"> </span><span style="color:#e8bf6a;"><style </span><span style="color:#bababa;">name=</span><span style="color:#a5c261;">"AppTheme" </span><span style="color:#bababa;">parent=</span><span style="color:#a5c261;">"Theme.AppCompat.Light.DarkActionBar"</span><span style="color:#e8bf6a;">>

</span><span style="color:#e8bf6a;"> </span><span style="color:#808080;font-style: italic;">

</span><span style="color:#808080;font-style: italic;"> </span><span style="color:#e8bf6a;"></style>

</span><span style="color:#e8bf6a;"></</span><span style="color:#e8bf6a;background-color: rgb(52, 65, 52);">resources</span><span style="color:#e8bf6a;">></span></pre><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">从名字我们就可以看出来，默认的标题栏为黑色。我们使用了toolbar就必须修改样式文件，将原来的标题栏去掉，修改后的样式文件如下：</span></p><p><span style="font-size:18px;"><br></span></p><span style="font-size:18px;"></span><pre style="color: rgb(169, 183, 198); font-family: '宋体'; font-size: 9pt; background-color: rgb(43, 43, 43);"><span style="color:#e8bf6a;"><resources>

</span><span style="color:#e8bf6a;"> </span><span style="color:#808080;font-style: italic;">

</span><span style="color:#e8bf6a;"> </span><span style="color:#808080;font-style: italic;">

</span><span style="color:#808080;font-style: italic;"> </span><span style="color:#e8bf6a;"></style>

</span><span style="color:#e8bf6a;"></resources></span></pre><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">如下这个时候运行，那么你将看到界面也是没有标题栏的，因为你并没有设置到AppCompatActivity中去。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">㈡将Toolbar显示到界面</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">我们创建一个方法名为initActionBar()，首先当然是获取ToolBar控件，然后将Toolbar设置到Activity中去。代码如下：</span></p><p><span style="font-size:18px;"><br></span></p><span style="font-size:18px;"></span><pre style="color: rgb(169, 183, 198); font-family: '宋体'; font-size: 9pt; background-color: rgb(43, 43, 43);"><span style="color:#cc7832;">public void </span><span style="color:#ffc66d;">initActionBar</span>() {

Toolbar toolbar = (Toolbar) findViewById(R.id.<span style="color:#9876aa;font-style: italic;">activity_main_toolbar</span>)<span style="color:#cc7832;">;

</span><span style="color:#cc7832;"> </span>setSupportActionBar(toolbar)<span style="color:#cc7832;">;

</span>}</pre><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">现在运行，我们将得到如下界面：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" alt="" src="http://img.blog.csdn.net/20151225131758160?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center"></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">依然不是你期待的效果，下面我们将介绍AppCompatActivity的细节。</span></p><p><span style="font-size:18px;"><br></span></p><h1><a name="t2"></a>3.AppCompatActivity详解</h1><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">㈠设置title</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">我们可以看到，标题栏始终显示我们的项目名，这样显然给用户看是不理想的。那么怎么设置标题栏的字符串。我们可以在setSupportActionBar(toolbar)之前加入如下代码：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">setTitle("liyuanjinglylyj");</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">此setTitle("liyuanjinglyj")是AppCompatActivity的方法，并不是toolbar的方法，那么我们运行一下程序将得到如下界面：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" alt="" src="http://img.blog.csdn.net/20151225132640292?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center"></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">那么我们将刚才的AppCompatActivity的setTitle换成Toolbar的setTitle看看效果会怎么样，其实结果如上图一样，没有任何变化。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">可能你希望title显示在中间，很遗憾，toolbar与AppCompatActivity并没有提供相关的方法，不过可以在toolbar中加入一个TextView，配置其属性，让其显示在最中间。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">㈡设置回退按钮</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">假如我的这个界面并不是主界面，而是一个子界面，这个时候我有一个需求，需要回退到上一个界面那么怎么设置左边的图标并实现其方法。其实很简单，在setSupportActionBar(toolbar);后面加入如下代码：</span></p><p><span style="font-size:18px;"><br></span></p><span style="font-size:18px;"></span><pre style="color: rgb(169, 183, 198); font-family: '宋体'; font-size: 9pt; background-color: rgb(43, 43, 43);">toolbar.setNavigationIcon(R.drawable.<span style="color:#9876aa;font-style: italic;">back</span>)<span style="color:#cc7832;">;

</span>toolbar.setNavigationOnClickListener(<span style="color:#cc7832;">new </span>View.OnClickListener() {

<span style="color:#bbb529;">@Override

</span><span style="color:#bbb529;"> </span><span style="color:#cc7832;">public void </span><span style="color:#ffc66d;">onClick</span>(View v) {

finish()<span style="color:#cc7832;">;

</span><span style="color:#cc7832;"> </span>}

})<span style="color:#cc7832;">;</span></pre><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><span style="color:#cc0000;">为什么在setSupportActionBar(toolbar);后面加入而不在前面，你可以加入到前面试试，虽然可以显示回退的图片，但是点</span><span style="color:#cc0000;">击并没有调用该按钮的点击事件，而在setSupportActionBar(toolbar);后面设置点击才有反应。一定要记住，不然回退</span><span style="color:#cc0000;">是不会起作用的。</span></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">运行结果如下：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" alt="" src="http://img.blog.csdn.net/20151225133539017?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center"></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">㈢设置logo</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">设置logo在标题栏并不少见，比如网易APP首页就的网易设置的logo，其实代码很简单，也仅仅需要一条代码即可，在setSupportActionBar(toolbar)前加入如下代码：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">toolbar.setLogo(R.id.app_logo);</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">运行结果如下：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" alt="" src="http://img.blog.csdn.net/20151225141239756?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center"></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">㈣设置副标题</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">在setSupportActionBar(toolbar)前加入如下代码：：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">toolbar.setSubtitle("liyuanjing");</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">运行界面后，如下：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" alt="" src="http://img.blog.csdn.net/20151225141600147?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center"></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">㈤设置菜单</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">我们知道onCreateOptionsMenu是上下文菜单，同理可以直接在该方法中设置菜单，代码如下：</span></p><p><span style="font-size:18px;"><br></span></p><span style="font-size:18px;"></span><pre style="color: rgb(169, 183, 198); font-family: '宋体'; font-size: 9pt; background-color: rgb(43, 43, 43);"><span style="color: rgb(187, 181, 41);">@Override

</span><span style="color: rgb(204, 120, 50);">public boolean </span><span style="color: rgb(255, 198, 109);">onCreateOptionsMenu</span>(Menu menu) {

getMenuInflater().inflate(R.menu.<span style="color: rgb(152, 118, 170); font-style: italic;">menu_main</span><span style="color: rgb(204, 120, 50);">, </span>menu)<span style="color: rgb(204, 120, 50);">;

</span><span style="color: rgb(204, 120, 50);"> return true;

</span>}</pre><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">此方法为Activity方法。因为你在上面已经讲Toolbar设置到了Activity中，所以默认也会显示到标题栏中，如果你觉得这样不习惯，那么你可以添加一条语句，不过这条语句添加不添加都没关系。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">toolbar.setOnCreateContextMenuListener(this);</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">运行程序，如下图所示：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" src="http://img.blog.csdn.net/20151225183407937?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt=""></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><br></span></p><h1><a name="t3"></a>4.Toolbar的Style</h1><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">3标题下的Toolbar是蓝色，且有很好Style，那么这是怎么设置呢，虽然我们这里重点是剖析Activity但是遇到有关Activity标题栏样式的还是要提到。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">我们粗略的讲解上面的标题栏用到了哪些Style：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">①<item name="colorPrimary">#4876FF</item>：如第一步直接在toolbar控件下面设置的属性一样，就是toolbar的颜色。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">②<item name="colorPrimaryDark">#3A5FCD</item>：状态栏颜色也就是标题栏上面的那个颜色，而我用的是小米1S测试的，其固件并没有很好的实现其功能，所以在该系统下并没有实现其效果。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">③<item name="android:windowBackground">@android:color/white</item>：窗口背景色，也就是Activity标题栏下面所有地方的颜色。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">当我们设置了如上三个属性，那么效果图就如上面所示了，完整代码如下：</span></p><p><span style="font-size:18px;"><br></span></p><span style="font-size:18px;"></span><pre style="color: rgb(169, 183, 198); font-family: '宋体'; font-size: 9pt; background-color: rgb(43, 43, 43);"><span style="color: rgb(128, 128, 128); font-style: italic;">

</span><span style="color: rgb(232, 191, 106);"><style </span><span style="color: rgb(186, 186, 186);">name=</span><span style="color: rgb(165, 194, 97);">"AppTheme" </span><span style="color: rgb(186, 186, 186);">parent=</span><span style="color: rgb(165, 194, 97);">"Theme.AppCompat.Light.NoActionBar"</span><span style="color: rgb(232, 191, 106);">>

</span><span style="color: rgb(232, 191, 106);"> </span><span style="color: rgb(128, 128, 128); font-style: italic;">

</span><span style="color: rgb(128, 128, 128); font-style: italic;"> </span><span style="color: rgb(232, 191, 106);"><item </span><span style="color: rgb(186, 186, 186);">name=</span><span style="color: rgb(165, 194, 97);">"colorPrimary"</span><span style="color: rgb(232, 191, 106);">></span>#4876FF<span style="color: rgb(232, 191, 106);"></item>

</span><span style="color: rgb(232, 191, 106);"> </span><span style="color: rgb(128, 128, 128); font-style: italic;">

</span><span style="color: rgb(128, 128, 128); font-style: italic;"> </span><span style="color: rgb(232, 191, 106);"><item </span><span style="color: rgb(186, 186, 186);">name=</span><span style="color: rgb(165, 194, 97);">"colorPrimaryDark"</span><span style="color: rgb(232, 191, 106);">></span>#3A5FCD<span style="color: rgb(232, 191, 106);"></item>

</span><span style="color: rgb(232, 191, 106);"> </span><span style="color: rgb(128, 128, 128); font-style: italic;">

</span><span style="color: rgb(128, 128, 128); font-style: italic;"> </span><span style="color: rgb(232, 191, 106);"><item </span><span style="color: rgb(186, 186, 186);">name=</span><span style="color: rgb(165, 194, 97);">"android:windowBackground"</span><span style="color: rgb(232, 191, 106);">></span>@android:color/white<span style="color: rgb(232, 191, 106);"></item>

</span><span style="color: rgb(232, 191, 106);">

</span><span style="color: rgb(232, 191, 106);"></style></span></pre><p><span style="font-size:18px;"><br></span></p><h1><a name="t4"></a>5.Toolbar菜单样式</h1><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">我们来看看如果直接使用上面的点击后边的菜单会有什么效果：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" src="http://img.blog.csdn.net/20151225185214307?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt=""></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">你有看到那个APP菜单弹出挡住了标题栏吗？，肯定没有吧，要是有的话，你肯定立即卸载了该应用了。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">下面我们的任务就是将该菜单的样式和其他APP一样，在标题栏下面弹出。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">首先要说明一下，toolbar菜单默认样式的父类为Widget.AppCompat.Light.PopupMenu.Overflow，那么要更改toobar中菜单的弹出的样式，就必须继承这个父类的样式。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">其代码如下：</span></p><p><span style="font-size:18px;"><br></span></p><span style="font-size:18px;"></span><pre style="color: rgb(169, 183, 198); font-family: '宋体'; font-size: 9pt; background-color: rgb(43, 43, 43);"><span style="color: rgb(128, 128, 128); font-style: italic;">

</span><span style="color: rgb(232, 191, 106);"> </span><span style="color: rgb(128, 128, 128); font-style: italic;">

</span><span style="color: rgb(232, 191, 106);"> </span><span style="color: rgb(128, 128, 128); font-style: italic;">

</span><span style="color: rgb(128, 128, 128); font-style: italic;"> </span><span style="color: rgb(232, 191, 106);"><item </span><span style="color: rgb(186, 186, 186);">name=</span><span style="color: rgb(165, 194, 97);">"colorPrimaryDark"</span><span style="color: rgb(232, 191, 106);">></span>#3A5FCD<span style="color: rgb(232, 191, 106);"></item>

</span><span style="color: rgb(232, 191, 106);"> </span><span style="color: rgb(128, 128, 128); font-style: italic;">

</span><span style="color: rgb(128, 128, 128); font-style: italic;"> </span><span style="color: rgb(232, 191, 106);"><item </span><span style="color: rgb(186, 186, 186);">name=</span><span style="color: rgb(165, 194, 97);">"android:windowBackground"</span><span style="color: rgb(232, 191, 106);">></span>@android:color/white<span style="color: rgb(232, 191, 106);"></item>

</span><span style="color: rgb(232, 191, 106);"> <item </span><span style="color: rgb(186, 186, 186);">name=</span><span style="color: rgb(165, 194, 97);">"actionOverflowMenuStyle"</span><span style="color: rgb(232, 191, 106);">></span>@style/LYJMenuStyle<span style="color: rgb(232, 191, 106);"></item>

</span><span style="color: rgb(232, 191, 106);"></style>

</span><span style="color: rgb(232, 191, 106);">

</span><span style="color: rgb(232, 191, 106);"><style </span><span style="color: rgb(186, 186, 186);">name=</span><span style="color: rgb(165, 194, 97);">"LYJMenuStyle" </span><span style="color: rgb(186, 186, 186);">parent=</span><span style="color: rgb(165, 194, 97);">"@style/Widget.AppCompat.Light.PopupMenu.Overflow"</span><span style="color: rgb(232, 191, 106);">>

</span><span style="color: rgb(232, 191, 106);"> <item </span><span style="color: rgb(186, 186, 186);">name=</span><span style="color: rgb(165, 194, 97);">"overlapAnchor"</span><span style="color: rgb(232, 191, 106);">></span>false<span style="color: rgb(232, 191, 106);"></item>

</span><span style="color: rgb(232, 191, 106);">

</span><span style="color: rgb(232, 191, 106);"></style></span></pre><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">设置这一个属性那么其弹出的样式就与其他APP一样不会覆盖标题栏。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">还有其他属性这里简要说明一下：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">①<item name="android:popupBackground">?attr/colorPrimary</item>：弹出菜单背景色为标题栏的背景色</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">②<item name="android:dropDownVerticalOffset">0dip</item>：弹出菜单与标题栏的垂直间距</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">将这两条加入LYJMenuStyle中就可以了实现如下图所示的弹出菜单：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;"><img width="200" height="400" src="http://img.blog.csdn.net/20151225192137883?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt=""></span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">最后介绍一下菜单里面重要的几个属性：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">app:showAsAction有三个值：</span></p><p><span style="font-size:18px;">always：总是显示在界面上<br>never：不显示在界面上，只让出现在右边的三个点中<br>ifRoom：如果有位置才显示，不然就出现在右边的三个点中</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">可以用 | 同时使用两个上面的值。</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">系统也为菜单提供了默认的分享菜单与查询菜单，代码如下：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">app:actionViewClass="android.support.v7.widget.SearchView"</span></p><p><span style="font-size:18px;">app:actionProviderClass="android.support.v7.widget.ShareActionProvider"</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">从名字想必不需要过多解释，最后一个就是显示的优先级，也就是显示的顺序，谁在最前面，谁在后面：</span></p><p><span style="font-size:18px;"><br></span></p><p><span style="font-size:18px;">android:orderInCategory数值越小，显示靠前，且优先级最大。</span></p><div style="top: 5423px;"></div> </div>

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<div id="comment_list"> <div class="comment_li_box clearfix"> <dl class="comment_list clearfix" id="comment_item_7275388"> <dt> <a href="/sinat_14811701"><img src="http://avatar.csdn.net/B/7/4/3_sinat_14811701.jpg" alt="sinat_14811701"></a></dt> <dd> <ul class="com_r clearfix"> <li class="top clearfix"> <h4><a href="/sinat_14811701">sinat_14811701</a></h4> <span class="time">2017-10-21 17:44</span> <span class="floor_num" floor="8">8楼</span> </li> <li class="mid clearfix"> <div class="comment_p">感谢楼主的分享</div> </li> <li class="bot clearfix"> <div> <a href="#reply" class="com_reply btn btn-noborder reply_btn" title="回复" commentid="7275388" floor="8">回复</a> </div> </li> </ul> </dd> </dl><div class="child_comment" data-listshow="false"> <div class="autoHeight clearfix"> </div></div> </div> <div class="comment_li_box clearfix"> <dl class="comment_list clearfix" id="comment_item_6746967"> <dt> <a href="/WuJinLong_2013"><img src="http://avatar.csdn.net/9/D/5/3_wujinlong_2013.jpg" alt="WuJinLong_2013"></a></dt> <dd> <ul class="com_r clearfix"> <li class="top clearfix"> <h4><a href="/WuJinLong_2013">WuJinLong_2013</a></h4> <span class="time">2017-04-12 14:53</span> <span class="floor_num" floor="7">7楼</span> </li> <li class="mid clearfix"> <div class="comment_p">学习了</div> </li> <li class="bot clearfix"> <div> <a href="#reply" class="com_reply btn btn-noborder reply_btn" title="回复" commentid="6746967" floor="7">回复</a> </div> </li> </ul> </dd> </dl><div class="child_comment" data-listshow="false"> <div class="autoHeight clearfix"> </div></div> </div> <div class="comment_li_box clearfix"> <dl class="comment_list clearfix" id="comment_item_6134021"> <dt> <a href="/stone_2323"><img src="http://avatar.csdn.net/B/2/6/3_stone_2323.jpg" alt="stone_2323"></a></dt> <dd> <ul class="com_r clearfix"> <li class="top clearfix"> <h4><a href="/stone_2323">stone_2323</a></h4> <span class="time">2016-07-19 09:21</span> <span class="floor_num" floor="6">6楼</span> </li> <li class="mid clearfix"> <div class="comment_p">楼主讲讲解的很好是，受教了</div> </li> <li class="bot clearfix"> <div> <a href="#reply" class="com_reply btn btn-noborder reply_btn" title="回复" commentid="6134021" floor="6">回复</a> </div> </li> </ul> </dd> </dl><div class="child_comment" data-listshow="false"> <div class="autoHeight clearfix"> </div></div> </div><div class="clear"></div></div>

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<div id="csdnBlogDir"><ol class="first_li"><li><a href="#t0">1. 初探AppCompatActivity</a></li><li><a href="#t1">2. AppCompatActivity与Toolbar结合</a></li><li><a href="#t2">3. AppCompatActivity详解</a></li><li><a href="#t3">4. Toolbar的Style</a></li><li><a href="#t4">5. Toolbar菜单样式</a></li></ol></div>

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