Question

我希望我的底部导航栏在按下时更改背景颜色（仅限所选区域），像下面的链接：

http://uupload.ir/files/nq3k_tab_bar.jpg

这是我的选择器的xml：

    <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto">
    <item android:state_checked="true" android:color="@color/beyez" />
    <item android:state_active="true" app:itemBackground="@color/backbeyez"/>
    <item android:color="@color/colorPrimaryDark"  />
</selector>

这是活动的xml：

<android.support.design.widget.BottomNavigationView
    android:id="@+id/bottomnav"
    android:layout_width="382dp"
    android:layout_height="52dp"
    android:layout_marginBottom="0dp"
    app:itemBackground="@color/colorPrimary"
    app:itemIconTint="@drawable/nav_items_color"
    app:itemTextColor="@drawable/nav_items_color"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"

    app:menu="@menu/navigation"
    tools:layout_editor_absoluteY="515dp">

</android.support.design.widget.BottomNavigationView>

这是我的Java类的代码：

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

    BottomNavigationView bottomNavigationView = (BottomNavigationView)findViewById(R.id.bottomnav);
    BottomNavigationViewHelper.disableShiftMode(bottomNavigationView);


    bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener()
    {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {

            switch (item.getItemId())
            {
                case R.id.navigation_orders:
                    switchorders();
                    break;

                case R.id.navigation_credit:
                    switchcredits();
                    break;

                case R.id.navigation_works:
                    switchworks();
                    break;

                case R.id.navigation_profile:
                    switchprofile();
                    break;

            }
            return true;
        }
    });

}

谢谢大家的帮忙！

Answer 1

只需将x app:itemBackground="@color/colorPrimary"中的BottomNavigationView行更改为可绘制对象，就像您对其他参数所做的那样（例如app:itemTextColor）。

修改

这应该有用，我用SDK＆gt;尝试了19

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@android:color/holo_blue_bright" android:state_checked="true"/> <item android:drawable="@android:color/holo_orange_light"/> </selector>

选择片段时Android底部导航栏项目背景颜色更改

1 个答案: