Android新的底部导航栏或BottomNavigationView

我认为您可能会在找这个.

以下是快速入门的片段:

public class MainActivity extends AppCompatActivity {
    private BottomBar mBottomBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Notice how you don't use the setContentView method here! Just
        // pass your layout to bottom bar, it will be taken care of.
        // Everything will be just like you're used to.
        mBottomBar = BottomBar.bind(this, R.layout.activity_main,
                savedInstanceState);

        mBottomBar.setItems(
                new BottomBarTab(R.drawable.ic_recents, "Recents"),
                new BottomBarTab(R.drawable.ic_favorites, "Favorites"),
                new BottomBarTab(R.drawable.ic_nearby, "Nearby"),
                new BottomBarTab(R.drawable.ic_friends, "Friends")
        );

        mBottomBar.setOnItemSelectedListener(new OnTabSelectedListener() {
            @Override
            public void onItemSelected(final int position) {
                // the user selected a new tab
            }
        });
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mBottomBar.onSaveInstanceState(outState);
    }
}

这是参考链接.

https://github.com/roughike/BottomBar

编辑新版本.

底部导航视图"已经存在于材料设计指南中已有一段时间了，但是要在我们的应用程序中实现它并不容易.一些应用程序构建了自己的解决方案，而另一些应用程序则依靠第三方开源库来完成工作.现在，设计支持库将看到底部导航栏的添加，让我们深入了解如何使用它！

The Bottom Navigation View has been in the material design guidelines for some time, but it hasn’t been easy for us to implement it into our apps. Some applications have built their own solutions, whilst others have relied on third-party open-source libraries to get the job done. Now the design support library is seeing the addition of this bottom navigation bar, let’s take a dive into how we can use it!

如何使用?

How to use ?

首先，我们需要更新依赖项！

To begin with we need to update our dependency!

compile ‘com.android.support:design:25.0.0’

设计xml.

Design xml.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- Content Container -->

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/bottom_navigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        app:itemBackground="@color/colorPrimary"
        app:itemIconTint="@color/white"
        app:itemTextColor="@color/white"
        app:menu="@menu/bottom_navigation_main" />

</RelativeLayout>

根据您的要求创建菜单.

Create menu as per your requirement.

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/action_favorites"
        android:enabled="true"
        android:icon="@drawable/ic_favorite_white_24dp"
        android:title="@string/text_favorites"
        app:showAsAction="ifRoom" />
    <item
        android:id="@+id/action_schedules"
        android:enabled="true"
        android:icon="@drawable/ic_access_time_white_24dp"
        android:title="@string/text_schedules"
        app:showAsAction="ifRoom" />
    <item
        android:id="@+id/action_music"
        android:enabled="true"
        android:icon="@drawable/ic_audiotrack_white_24dp"
        android:title="@string/text_music"
        app:showAsAction="ifRoom" />
</menu>

处理启用/禁用状态.制作选择器文件.

Handling Enabled / Disabled states. Make selector file.

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

处理点击事件.

Handle click events.

BottomNavigationView bottomNavigationView = (BottomNavigationView)
                findViewById(R.id.bottom_navigation);

bottomNavigationView.setOnNavigationItemSelectedListener(
        new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                switch (item.getItemId()) {
                    case R.id.action_favorites:

                        break;
                    case R.id.action_schedules:

                        break;
                    case R.id.action_music:

                        break;
                }
                return false;
            }
});

使用Androidx，您只需要添加以下依赖项.

implementation 'com.google.android.material:material:1.2.0-alpha01'

布局

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             xmlns:app="http://schemas.android.com/apk/res-auto" 
             xmlns:tools="http://schemas.android.com/tools"
             android:layout_width="match_parent"
             android:layout_height="match_parent">
    <com.google.android.material.bottomnavigation.BottomNavigationView
            android:layout_gravity="bottom"
            app:menu="@menu/bottom_navigation_menu"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
</FrameLayout>

如果您想详细了解它的方法及其工作方式，请

If you want to read more about it's methods and how it works read this.

肯定会为您提供帮助.