Android自定义ActionBar背景颜色（从源码分析）

Android自定义ActionBar背景颜色

修改前后效果图：


 


在style.xml里加一行代码搞定

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/green</item>
</style>

那为什么是"colorPrimary"呢，一层一层找

<style name="Theme.AppCompat.Light.DarkActionBar" parent="Base.Theme.AppCompat.Light.DarkActionBar" />

这里已经出现“colorPrimary"了

<style name="Base.Theme.AppCompat.Light.DarkActionBar" parent="Base.Theme.AppCompat.Light">
<item name="actionBarPopupTheme">@style/ThemeOverlay.AppCompat.Light</item>
<item name="actionBarWidgetTheme">@null</item>
<item name="actionBarTheme">@style/ThemeOverlay.AppCompat.Dark.ActionBar</item>

<!-- Panel attributes -->
<item name="listChoiceBackgroundIndicator">@drawable/abc_list_selector_holo_dark</item>
<item name="colorPrimaryDark">@color/primary_dark_material_dark</item>
<item name="colorPrimary">@color/primary_material_dark</item>
</style>

<style name="Base.Theme.AppCompat.Light" parent="Base.V7.Theme.AppCompat.Light"></style>

找到”actionBarStyle“

<style name="Base.V7.Theme.AppCompat.Light" parent="Platform.AppCompat.Light">
<item name="windowActionBar">true</item>
<item name="windowActionBarOverlay">false</item>

<!-- Used by MediaRouter -->
<item name="isLightTheme">true</item>
<item name="selectableItemBackground">@drawable/abc_item_background_holo_light</item>
<item name="selectableItemBackgroundBorderless">?attr/selectableItemBackground</item>
<item name="homeAsUpIndicator">@drawable/abc_ic_ab_back_mtrl_am_alpha</item>
<item name="dividerVertical">@drawable/abc_list_divider_mtrl_alpha</item>
<item name="dividerHorizontal">@drawable/abc_list_divider_mtrl_alpha</item>

<!-- Action Bar Styles -->
<item name="actionBarTabStyle">@style/Widget.AppCompat.Light.ActionBar.TabView</item>
<item name="actionBarTabBarStyle">@style/Widget.AppCompat.Light.ActionBar.TabBar</item>
<item name="actionBarTabTextStyle">@style/Widget.AppCompat.Light.ActionBar.TabText</item>
<item name="actionButtonStyle">@style/Widget.AppCompat.Light.ActionButton</item>
<item name="actionOverflowButtonStyle">@style/Widget.AppCompat.Light.ActionButton.Overflow</item>
<item name="actionOverflowMenuStyle">@style/Widget.AppCompat.Light.PopupMenu.Overflow</item>
<item name="actionBarStyle">@style/Widget.AppCompat.Light.ActionBar.Solid</item></span>
<item name="actionBarSplitStyle">?attr/actionBarStyle</item>
<item name="actionBarWidgetTheme">@null</item>
<item name="actionBarTheme">@style/ThemeOverlay.AppCompat.ActionBar</item>
<item name="actionBarSize">@dimen/abc_action_bar_default_height_material</item>
<item name="actionBarDivider">?attr/dividerVertical</item>
<item name="actionBarItemBackground">?attr/selectableItemBackgroundBorderless</item>
<item name="actionMenuTextAppearance">@style/TextAppearance.AppCompat.Widget.ActionBar.Menu</item>
<item name="actionMenuTextColor">?android:attr/textColorPrimaryDisableOnly</item>

<!-- Action Mode -->
<item name="actionModeStyle">@style/Widget.AppCompat.ActionMode</item>
<item name="actionModeBackground">@drawable/abc_cab_background_top_material</item>
<item name="actionModeSplitBackground">?attr/colorPrimaryDark</item>
<item name="actionModeCloseDrawable">@drawable/abc_ic_ab_back_mtrl_am_alpha</item>
<item name="actionModeCloseButtonStyle">@style/Widget.AppCompat.ActionButton.CloseMode</item>
<item name="actionModeCutDrawable">@drawable/abc_ic_menu_cut_mtrl_alpha</item>
<item name="actionModeCopyDrawable">@drawable/abc_ic_menu_copy_mtrl_am_alpha</item>
<item name="actionModePasteDrawable">@drawable/abc_ic_menu_paste_mtrl_am_alpha</item>
<item name="actionModeSelectAllDrawable">@drawable/abc_ic_menu_selectall_mtrl_alpha</item>
<item name="actionModeShareDrawable">@drawable/abc_ic_menu_share_mtrl_alpha</item>

<!-- Dropdown Spinner Attributes -->
<item name="actionDropDownStyle">@style/Widget.AppCompat.Light.Spinner.DropDown.ActionBar</item>

<!-- Panel attributes -->
<item name="panelMenuListWidth">@dimen/abc_panel_menu_list_width</item>
<item name="panelMenuListTheme">@style/Theme.AppCompat.CompactMenu</item>
<item name="panelBackground">@drawable/abc_menu_hardkey_panel_mtrl_mult</item>
<item name="android:panelBackground">@android:color/transparent</item>
<item name="listChoiceBackgroundIndicator">@drawable/abc_list_selector_holo_light</item>

<!-- List attributes -->
<item name="textAppearanceListItem">@style/TextAppearance.AppCompat.Subhead</item>
<item name="textAppearanceListItemSmall">@style/TextAppearance.AppCompat.Subhead</item>
<item name="listPreferredItemHeight">64dp</item>
<item name="listPreferredItemHeightSmall">48dp</item>
<item name="listPreferredItemHeightLarge">80dp</item>
<item name="listPreferredItemPaddingLeft">16dip</item>
<item name="listPreferredItemPaddingRight">16dip</item>

<!-- Required for use of support_simple_spinner_dropdown_item.xml -->
<item name="spinnerDropDownItemStyle">@style/Widget.AppCompat.DropDownItem.Spinner</item>
<item name="dropdownListPreferredItemHeight">?attr/listPreferredItemHeightSmall</item>

<!-- Popup Menu styles -->
<item name="popupMenuStyle">@style/Widget.AppCompat.Light.PopupMenu</item>
<item name="textAppearanceLargePopupMenu">@style/TextAppearance.AppCompat.Light.Widget.PopupMenu.Large</item>
<item name="textAppearanceSmallPopupMenu">@style/TextAppearance.AppCompat.Light.Widget.PopupMenu.Small</item>
<item name="listPopupWindowStyle">@style/Widget.AppCompat.ListPopupWindow</item>
<item name="dropDownListViewStyle">@style/Widget.AppCompat.ListView.DropDown</item>

<!-- SearchView attributes -->
<item name="searchViewStyle">@style/Widget.AppCompat.Light.SearchView</item>
<item name="android:dropDownItemStyle">@style/Widget.AppCompat.DropDownItem.Spinner</item>
<item name="textColorSearchUrl">@color/abc_search_url_text</item>
<item name="textAppearanceSearchResultTitle">@style/TextAppearance.AppCompat.SearchResult.Title</item>
<item name="textAppearanceSearchResultSubtitle">@style/TextAppearance.AppCompat.SearchResult.Subtitle</item>

<!-- ShareActionProvider attributes -->
<item name="activityChooserViewStyle">@style/Widget.AppCompat.Light.ActivityChooserView</item>

<!-- Toolbar styles -->
<item name="toolbarStyle">@style/Widget.AppCompat.Toolbar</item>
<item name="toolbarNavigationButtonStyle">@style/Widget.AppCompat.Toolbar.Button.Navigation</item>
<item name="android:editTextStyle">@style/Widget.AppCompat.EditText</item>
<item name="editTextBackground">@drawable/abc_edit_text_material</item>
<item name="editTextColor">?android:attr/textColorPrimary</item>

<!-- Color palette -->
<item name="colorPrimaryDark">@color/primary_dark_material_light</item>
<item name="colorPrimary">@color/primary_material_light</item>
<item name="colorAccent">@color/accent_material_light</item>
<item name="colorControlNormal">?android:attr/textColorSecondary</item>
<item name="colorControlActivated">?attr/colorAccent</item>
<item name="colorControlHighlight">@color/ripple_material_light</item>
<item name="colorSwitchThumbNormal">@color/switch_thumb_normal_material_light</item>
<item name="drawerArrowStyle">@style/Widget.AppCompat.DrawerArrowToggle</item>
<item name="switchStyle">@style/Widget.AppCompat.CompoundButton.Switch</item>
</style>

<style name="Widget.AppCompat.Light.ActionBar.Solid" parent="Base.Widget.AppCompat.Light.ActionBar.Solid"></style>

终于找到了

<style name="Base.Widget.AppCompat.Light.ActionBar.Solid">
<item name="background">?attr/colorPrimary</item></span>
<item name="backgroundStacked">?attr/colorPrimary</item>
<item name="backgroundSplit">?attr/colorPrimary</item>
</style>

最后看定义注释，By default,the color applied to the action bar background,似乎明白了什么。

<!--
The primary branding color for the app. By default, this is the color applied to the
action bar background.
-->
<attr name="colorPrimary" format="color" />