这不是推荐的解决方案，因为我要在这里的android api，但作为我的应用程序需要在条件上动态改变主题xml不可能在这里，所以我需要这样做。但是这个解决方法很有效。

解决方案:——

 /**
 * 
 * @author Kailash Dabhi
 * @email kailash09dabhi@gmail.com
 *
 */ 
 public static void setActionbarTextColor(Activity activity, int color) {
    Field mActionViewField;
    try {
        mActionViewField = activity.getActionBar().getClass()
                .getDeclaredField("mActionView");
        mActionViewField.setAccessible(true);
        Object mActionViewObj = mActionViewField.get(activity
                .getActionBar());

        Field mTitleViewField = mActionViewObj.getClass().getDeclaredField(
                "mTitleView");
        mTitleViewField.setAccessible(true);
        Object mTitleViewObj = mTitleViewField.get(mActionViewObj);

        TextView mActionBarTitle = (TextView) mTitleViewObj;
        mActionBarTitle.setTextColor(color);
        // Log.i("field", mActionViewObj.getClass().getName());
    } catch (NoSuchFieldException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    }

}

我已经用简单的一行代码完成了

actionBar.setTitle(Html.fromHtml("<font color='#ff0000'>ActionBartitle </font>"));

试着在Activity的onCreate中添加这个。适用于几乎所有Android版本。

 actionBar.setTitle(Html.fromHtml("<font color='#ffff00'>Your Title</font>"));  

or

getSupportActionBar().setTitle(Html.fromHtml("<font color='#ffff00'>Your Title</font>"));

很多答案已弃用，所以我将更新线程，并展示如何在ActionBar(工具栏)和ActionBar弹出菜单中更改文本颜色和背景色。

在Android中(截至2018年5月)使用操作栏(工具栏)的最新方法是使用主题和NoActionBar，而不是使用工具栏。

这就是你所需要的:

In Activity (which extends AppCompatActivity) declare Toolbar: Toolbar myToolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(myToolbar); Add Toolbar in the Activity's layout xml. Here we will set our custom (overwritten themes), note android:theme="@style/ThemeOverlay.AppTheme.ActionBar" and app:popupTheme="@style/ThemeOverlay.AppTheme.PopupMenu", they will do the trick. <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="?attr/actionBarSize" android:theme="@style/ThemeOverlay.AppTheme.ActionBar" app:popupTheme="@style/ThemeOverlay.AppTheme.PopupMenu" app:layout_constraintTop_toTopOf="parent" /> In your styles.xml you will have to overwrite those two styles to set custom colors: <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> <!-- Customize your theme here. --> <item name="colorPrimary">@color/colorPrimary</item> <item name="colorPrimaryDark">@color/colorPrimaryDark</item> <item name="colorAccent">@color/colorAccent</item> <item name="actionBarTheme">@style/ThemeOverlay.AppTheme.ActionBar</item> <item name="actionBarPopupTheme">@style/ThemeOverlay.AppTheme.PopupMenu</item> </style> <style name="ThemeOverlay.AppTheme.ActionBar" parent="ThemeOverlay.AppCompat.Dark.ActionBar"> <item name="android:textColorPrimary">@color/action_bar_text_color</item> <item name="android:background">@color/action_bar_bg_color</item> </style> <style name="ThemeOverlay.AppTheme.PopupMenu" parent="ThemeOverlay.AppCompat.Dark.ActionBar"> <item name="android:background">@color/popup_bg_color</item> <item name="android:textColorPrimary">@color/popup_text_color</item> </style>

就是这样，伙计们

附注:如果你问我，我会说:是的，整个主题的事情是一团糟。

<android.support.v7.widget.Toolbar
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:id="@+id/toolbar"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:background="@color/color_primary"
  android:theme="@style/GalaxyZooThemeToolbarDarkOverflow"
  app:popupTheme="@style/Theme.AppCompat.NoActionBar" />


<style name="GalaxyZooThemeToolbarDarkOverflow" parent="Theme.AppCompat.NoActionBar">
  <!-- android:textColorPrimary is the  color of the title text
       in the Toolbar, in the Theme.AppCompat theme:  -->
  <item name="android:textColorPrimary">@color/abc_primary_text_material_light</item>
 
  <!-- android:textColorPrimaryInverse is the  color of the title
       text in the Toolbar, in the Theme.AppCompat.Light theme:  -->
  <!-- <item name="android:textColorPrimaryInverse">@color/abc_primary_text_material_light</item> -->
 
  <!-- android:actionMenuTextColor is the color of the text of
        action (menu) items in the Toolbar, at least in the
        Theme.AppCompat theme.
        For some reason, they already get the textColorPrimary
        when running on API 21, but not on older versions of
        Android, so this is only necessary to support older
        Android versions.-->
        <item name="actionMenuTextColor">@color/abc_primary_text_material_light</item>
  <!-- android:textColorSecondary is the color of the menu
       overflow icon (three vertical dots) -->
  <item name="android:textColorSecondary">@color/abc_secondary_text_material_light</item>
 
  <!-- This would set the toolbar's background color,
        but setting this also changes the popup menu's background,
        even if we define popupTheme for our <Toolbar> -->
  <!-- <item name="android:background">@color/color_primary</item> -->
</style>


**Reference:**
[https://www.murrayc.com/permalink/2014/10/28/android-changing-the-toolbars-text-color-and-overflow-icon-color/][1]

这是一个老话题，但对于未来的读者来说，使用工具栏使一切变得非常简单:

Toolbar toolbar = (Toolbar) findViewById(R.id.tool_bar);
toolbar.setTitle(R.string.app_name);
toolbar.setTitleTextColor(getResources().getColor(R.color.someColor));
setSupportActionBar(toolbar);