Question

我的Android项目有问题。我无法改变底栏的颜色。
这就是我希望我的底栏看起来的样子：

这是我的代码

菜单＆gt; tabhost_bottom.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"

>
<item
    android:id="@+id/home_item"
    android:icon="@drawable/ic_home"
    android:color="@color/colorPrimary"
    android:title="Home"
    />
<item
    android:id="@+id/setting_item"
    android:icon="@drawable/ic_setting"
    android:color="@color/colorPrimary"
    android:title="Setting" />

HomeActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

    coordinatorLayout = (CoordinatorLayout) findViewById(R.id.tabhost_activity);

    BottomBar bottomBar = BottomBar.attach(this, savedInstanceState);
    bottomBar.setItemsFromMenu(R.menu.tabhost_bottom, new OnMenuTabSelectedListener() {
        @Override
        public void onMenuItemSelected(int itemId) {

        }
    });

    // Set the color for the active tab. Ignored on mobile when there are more than three tabs.
    bottomBar.setActiveTabColor("#55a8e5");

    // Use the dark theme. Ignored on mobile when there are more than three tabs.
    bottomBar.setBackgroundColor(Color.parseColor("#55a8e5"));
    // Use custom text appearance in tab titles.
    //bottomBar.setTextAppearance(R.style.MyTextAppearance);

    // Use custom typeface that's located at the "/src/main/assets" directory. If using with
    // custom text appearance, set the text appearance first.
    //bottomBar.setTypeFace("MyFont.ttf");
}

这是我的参考资料

http://androidgifts.com/build-android-material-design-bottom-navigation/

Answer 1

我终于用以下代码（Xamarin C＃）来改变它了

var bottomBarBackground = FindViewById(Resource.Id.bb_bottom_bar_background_view);
bottomBarBackground.SetBackgroundResource(Resource.Drawable.tabbar_background);

tabbar_background.axml：

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
        <shape android:shape="rectangle">
            <solid android:color="@color/YourColor"/>
        </shape>
    </item>
</layer-list>

也在这里找到，虽然最终解决方案对我来说不适用于Xamarin版本：Question about background color

Answer 2

这是library吗？

其他选项：

似乎需要以不同的方式设置Background颜色：

    // Setting colors for different tabs when there's more than three of them.
    // You can set colors for tabs in three different ways as shown below.
    mBottomBar.mapColorForTab(0, ContextCompat.getColor(this, R.color.colorAccent));
    mBottomBar.mapColorForTab(1, 0xFF5D4037);
    mBottomBar.mapColorForTab(2, "#7B1FA2");
    mBottomBar.mapColorForTab(3, "#FF5252");
    mBottomBar.mapColorForTab(4, "#FF9800");

更多信息： Android new Bottom Navigation bar

Answer 3

当您使用this库（roughike的底栏）时，您可以试试这个。

您可以使用以下行设置特定标签的背景颜色：

bottomBar.getTabAtPosition(0).setBackgroundColor(backgroundColorInt);

当您为每个标签多次使用此行时，您可以更改整个标签的背景颜色。

Answer 4

对于所有Kotlin粉丝：要为底部导航栏中的所有项目设置背景颜色，只需在MainActivity类的onCreate函数中添加以下行即可：

// finds view in bottom_nav_menu.xml
val navView: BottomNavigationView = findViewById(R.id.nav_view)
// sets background color for the whole bar 
navView.setBackgroundColor(ContextCompat.getColor(this, R.color.yourColor))

更改背景颜色Bottom Bar android

4 个答案: