Question

我已经通过

创建了操作栏

ActionBar actionbar = getActionBar()

操作栏的背景由

更改

actionbar.setBackgroundDrawable(actionBarBackgroundImage);

现在我需要以编程方式更改操作栏选项卡下划线颜色。是否有任何方法可以更改操作栏选项卡下划线颜色？

Answer 1

或者，您可以使用Android Action Bar Style Generator轻松设置操作栏和标签的主题。

Answer 2

这是一种更简单的方法。我知道你正在寻找一个程序化的改变，但这个真的很容易。

我这几天一直在努力，但终于找到了解决方案。我正在使用AppCompat。您可以在主题中设置colorAccent，这将更改ActionBar上的突出显示颜色。像这样：

<item name="colorAccent">@color/highlightcolor</item>

这是在上下文中：

<style name="LightTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <item name="colorPrimary">@color/darkgrey</item>
    <item name="colorPrimaryDark">@color/black</item>
    <item name="colorAccent">@color/highlightcolor</item>
</style>

我最初发布此答案的地方：Android Tab underline color not changing

Answer 3

我建议您使用ActionBarSherlock。库中有一个名为“Style ActionBar”的样本。（这是您可以更改ActionBar选项卡下划线颜色的唯一方法）

如果您已自定义ActionBar，则必须在ActionBar Style

中添加此样式

或者这是如何做到这一点

enter image description here

创建如下所示的样式（这里我使用了ActionBarShareLock，如果你不想使用 android-support-v4.jar 来支持所有Android操作系统版本）

<style name="Theme.AndroidDevelopers" parent="Theme.Sherlock.Light">
        <item name="android:actionBarTabStyle">@style/MyActionBarTabStyle</item>
        <item name="actionBarTabStyle">@style/MyActionBarTabStyle</item>
    </style>

    <!-- style for the tabs -->
    <style name="MyActionBarTabStyle" parent="Widget.Sherlock.Light.ActionBar.TabBar">
        <item name="android:background">@drawable/actionbar_tab_bg</item>
        <item name="android:paddingLeft">32dp</item>
        <item name="android:paddingRight">32dp</item>

actionbar_tab_bg.xml

<item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/ad_tab_unselected_holo" />
<item android:state_focused="false" android:state_selected="true"  android:state_pressed="false" android:drawable="@drawable/ad_tab_selected_holo" />
<item android:state_selected="false" android:state_pressed="true" android:drawable="@drawable/ad_tab_selected_pressed_holo" />
<item android:state_selected="true"  android:state_pressed="true" android:drawable="@drawable/ad_tab_selected_pressed_holo" />

在Android清单文件

中的活动中应用此样式

<activity
            android:name="com.example.tabstyle.MainActivity"
            android:label="@string/app_name"
            android:theme="@style/Theme.AndroidDevelopers" >

有关详细信息，请查看此answer和此article。

已编辑：2015年9月29日

不推荐使用

ActionBarSherlock ，因此您可以使用android design支持库和Android app appcompat库来托管TOOLBAR（不推荐使用Action-Bar）和TABS。

使用TabLayout，如下所示

<android.support.design.widget.TabLayout
            android:id="@+id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabGravity="center"
            app:tabMode="scrollable"
            app:tabSelectedTextColor="@color/white"
            app:tabIndicatorColor="@color/colorPrimary"
            app:tabIndicatorHeight="2dip"
            app:tabTextAppearance="?android:attr/textAppearanceMedium"
            app:tabTextColor="@color/colorAccent" />

here is sample of android design support library with tab

Answer 4

请参阅this，了解自定义操作栏，

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- the theme applied to the application or activity -->
    <style name="CustomActivityTheme" parent="@android:style/Theme.Holo">
        <item name="android:actionBarStyle">@style/MyActionBar</item>
        <!-- other activity and action bar styles here -->
    </style>

    <!-- style for the action bar backgrounds -->
    <style name="MyActionBar" parent="@android:style/Widget.Holo.ActionBar">
        <item name="android:background">@drawable/ab_background</item>
        <item name="android:backgroundStacked">@drawable/ab_background</item>
        <item name="android:backgroundSplit">@drawable/ab_split_background</item>
    </style>
</resources>

Answer 5

我尝试了很多在这里发布的建议和其他地方没有运气。但我认为我设法拼凑了一个（尽管不是完美的）解决方案。

TabWidget正在使用选择器。基本上它根据选项卡的状态（选中，按下等）显示不同的9补丁图像。我终于想通了你可以用编程方式生成一个选择器。我开始使用http://android-holo-colors.com/生成的9个补丁（颜色：＃727272，TabWidget：是）。

最大的问题是设定颜色。设置滤色器什么也没做。所以，我最终改变了循环内9补丁图像的每个像素的颜色。

...    
/**
 * <code>NinePatchDrawableUtility</code> utility class for manipulating nine patch resources.
 * 
 * @author amossman
 *
 */
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class NinePatchDrawableUtility {

    // Matches the colors in the supported drawables
    private static final int TAB_UNDERLINE_HIGHLIGHT_COLOR = 1417247097;
    private static final int TAB_UNDERLINE_COLOR = -8882056;
    private static final int TAB_PRESSED_COLOR = -2122745479;

    private Resources resources;

    public NinePatchDrawableUtility(Resources resources) {
        this.resources = resources;
    }

    /**
     * Create a <code>StateListDrawable</code> that can be used as a background for the {@link android.widget.TabWidget}</br></br>
     * 
     * <code>
     * FragmentTabHost tabHost = ...</br>
     * NinePatchUtility ninePatchUtility = new NinePatchUtility(getResources());</br>
     * TabWidget tabWidget =  tabHost.getTabWidget();</br>
     * for (int i = 0; i < tabWidget.getChildCount(); i++) {</br>
     * &nbsp;&nbsp;&nbsp;tabWidget.getChildAt(i).setBackground(ninePatchUtility.getTabStateListDrawable(titleColor));</br>
     * }
     * </code>
     * 
     * @param tintColor The color to tint the <code>StateListDrawable</code>
     * @return A new <code>StateListDrawable</code> that has been tinted to the given color
     */
    public StateListDrawable getTabStateListDrawable(int tintColor) {
        StateListDrawable states = new StateListDrawable();
        states.addState(new int[] {android.R.attr.state_pressed},
            changeTabNinePatchColor(resources, R.drawable.cc_tab_selected_pressed_holo, tintColor));
        states.addState(new int[] {android.R.attr.state_focused},
            changeTabNinePatchColor(resources, R.drawable.cc_tab_selected_focused_holo, tintColor));
        states.addState(new int[] {android.R.attr.state_selected},
            changeTabNinePatchColor(resources, R.drawable.cc_tab_selected_holo, tintColor));
        states.addState(new int[] { },
            changeTabNinePatchColor(resources, R.drawable.cc_tab_unselected_holo, tintColor));
        return states;
    }

    /**
     * Change the color of the tab indicator.</br></br>
     * 
     * Supports only the following drawables:</br></br>
     * 
     * R.drawable.cc_tab_selected_pressed_holo</br>
     * R.drawable.cc_tab_selected_focused_holo</br>
     * R.drawable.cc_tab_selected_holo</br>
     * R.drawable.cc_tab_unselected_holo</br></br>
     * 
     * Note: This method is not efficient for large <code>Drawable</code> sizes.
     * 
     * @param resources Contains display metrics and image data
     * @param drawable The nine patch <code>Drawable</code> for the tab
     * @param tintColor The color to tint the <code>Drawable</code>
     * @return A new <code>NinePatchDrawable</code> tinted to the given color
     */
    public NinePatchDrawable changeTabNinePatchColor(Resources resources, int drawable, int tintColor) {

        int a = Color.alpha(tintColor);
        int r = Color.red(tintColor);
        int g = Color.green(tintColor);
        int b = Color.blue(tintColor);
        BitmapFactory.Options opt = new BitmapFactory.Options();
        opt.inMutable = true;
        Bitmap bitmap = BitmapFactory.decodeResource(resources, drawable, opt);
        for (int x = 0; x < bitmap.getWidth(); x++) {
            for (int y = 0; y < bitmap.getHeight(); y++) {
                int color = bitmap.getPixel(x, y);
                if (color == TAB_PRESSED_COLOR) {
                    bitmap.setPixel(x, y, Color.argb((int)(a * 0.5), r, g, b));
                } else if (color == TAB_UNDERLINE_HIGHLIGHT_COLOR) {
                    bitmap.setPixel(x, y, Color.argb((int)(a * 0.9), r, g, b));
                } else if (color == TAB_UNDERLINE_COLOR) {
                    bitmap.setPixel(x, y, tintColor);
                }
            }
        }
        return new NinePatchDrawable(resources, bitmap, bitmap.getNinePatchChunk(), new Rect(), null);
    }

}

使用示例：

/**
 * Theme the tab widget with the defined background color and title color set
 * in the TabManager
 * @param tabWidget
 */
@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
public void theme(TabWidget tabWidget) {
    ColorDrawable backgroundDrawable = new ColorDrawable(backgroundColor);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        tabWidget.setBackground(backgroundDrawable);
        tabWidget.setAlpha(0.95f);
    } else {
        backgroundDrawable.setAlpha(242);
        tabWidget.setBackgroundDrawable(backgroundDrawable);
    }
    NinePatchDrawableUtility ninePatchUtility = new NinePatchDrawableUtility(resources);
    for (int i = 0; i < tabWidget.getChildCount(); i++) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            tabWidget.getChildAt(i).setBackground(ninePatchUtility.getTabStateListDrawable(titleColor));
        } else {
            tabWidget.getChildAt(i).setBackgroundDrawable(ninePatchUtility.getTabStateListDrawable(titleColor));
        }
        View tabView = tabWidget.getChildTabViewAt(i);
        tabView.setPadding(0, 0, 0, 0);
        TextView tv = (TextView) tabView.findViewById(android.R.id.title);
        tv.setSingleLine(); // set the texts on the tabs to be single line
        tv.setTextColor(titleColor);
    }
}

Answer 6

经过一整天的搜索后，我得到了改变Tab Highlighter Color的解决方案。只需2行代码就能让这个工作变得完美！

转到 values / styles.xml 并在ActionBar主题中添加以下代码

<item name="colorAccent">@color/Tab_Highlighter</item>

现在在 colors.xml

中为Tab_Highlighter提供颜色

<color name="Tab_Highlighter">#ffffff</color>

Answer 7

尝试以下。

在res / drawable中编写tabs_selector_green.xml。

    <!-- Non focused states -->
<item android:drawable="@android:color/transparent" android:state_focused="false" android:state_pressed="false" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs_green" android:state_focused="false" android:state_pressed="false" android:state_selected="true"/>

<!-- Focused states -->
<item android:drawable="@android:color/transparent" android:state_focused="true" android:state_pressed="false" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs_green" android:state_focused="true" android:state_pressed="false" android:state_selected="true"/>

<!-- Pressed -->
<!-- Non focused states -->
<item android:drawable="@android:color/transparent" android:state_focused="false" android:state_pressed="true" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs_green" android:state_focused="false" android:state_pressed="true" android:state_selected="true"/>

<!-- Focused states -->
<item android:drawable="@android:color/transparent" android:state_focused="true" android:state_pressed="true" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs_green" android:state_focused="true" android:state_pressed="true" android:state_selected="true"/>

在res / drawable文件夹中写入layer_bg_selected_tabs_green.xml。

<item>
    <shape android:shape="rectangle" >
        <solid android:color="@color/tab_green" />

        <padding android:bottom="5dp" />
    </shape>
</item>
<item>
    <shape android:shape="rectangle" >
        <solid android:color="#FFFFFF" />
    </shape>
</item>

并在java代码中写这个。

private static final int[] TABS_BACKGROUND = {
        R.drawable.tabs_selector_orange, R.drawable.tabs_selector_green,
        R.drawable.tabs_selector_red, R.drawable.tabs_selector_blue,
        R.drawable.tabs_selector_yellow };
/*
BLA BLA BLA
*/
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
    // TODO Auto-generated method stub
    RelativeLayout tabLayout = (RelativeLayout) tab.getCustomView();
    tabLayout.setBackgroundResource(TABS_BACKGROUND[tab.getPosition()]);
    tab.setCustomView(tabLayout);
/* ... */
}

Answer 8

您可以使用此代码：

actionBar.setStackedBackgroundDrawable(new ColorDrawable(yourColor));

更改ActionBar选项卡以编程方式为颜色加下划线

8 个答案: