安卓笔记 底部菜单栏的实现 BottomNavigationView

类所在包package android.support.design.widget;

效果图

java代码

 public static void generateFootMenu(ViewGroup rootView, int defaultSelected){
        Activity activity = getActivityFromView(rootView);
        if(activity == null){
            Toast.makeText(rootView.getContext(), "Render Foot Menu Eror", Toast.LENGTH_SHORT).show();
            return;
        }

        BottomNavigationView foot = new BottomNavigationView(rootView.getContext());
        foot.inflateMenu(R.menu.footmenu);
        foot.setItemIconTintList(rootView.getContext().getResources().getColorStateList(R.color.bnav_setting_btn_text_selector));
        foot.setItemTextColor(rootView.getContext().getResources().getColorStateList(R.color.bnav_setting_btn_text_selector));
        //设置背景色 此处是设置的背景样式xml 自定义
        foot.setBackgroundResource(R.drawable.shadow);
        rootView.addView(foot);
        foot.setSelectedItemId(defaultSelected);
        foot.setOnNavigationItemSelectedListener((item) -> {
            switch (item.getItemId()) {
                case R.id.footer_home:
                    if (activity instanceof MainActivity){
                        return false;
                    }
                    Intent homeintent = new Intent(rootView.getContext(), MainActivity.class);
                    activity.startActivityForResult(homeintent, 1);
                    return true;
                case R.id.footer_my_info:
                    if (activity instanceof MyInfoActivity){
                        return false;
                    }
                    Intent intent1 = new Intent(rootView.getContext(), MyInfoActivity.class);
                    activity.startActivityForResult(intent1, 1);
                    return true;

            }
            return false;
        });

    }


    public static Activity getActivityFromView(View view) {
        if (null != view) {
            Context context = view.getContext();
            while (context instanceof ContextWrapper) {
                if (context instanceof Activity) {
                    return (Activity) context;
                }
                context = ((ContextWrapper) context).getBaseContext();
            }
        }
        return null;
    }

底部菜单样式文件 footmenu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">


    <item
        android:title="主页"
        android:id="@+id/footer_home"
        android:icon="@mipmap/home"
        android:textColor="#2c2c2c"
        android:background="@drawable/btn_white"
        android:textSize="@dimen/textsize_l"
        />
    <item
        android:id="@+id/footer_my_info"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="@drawable/btn_white"
        android:icon="@mipmap/my"
        android:textColor="#2c2c2c"
        android:title="@string/title_my_info"
        android:textSize="@dimen/textsize_l"
        />

</menu>

使用

界面xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:id="@+id/context"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:orientation="vertical" >
        <Button
            android:id="@+id/sign_in_button"
            style="@style/BtnPrimary"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="@string/action_sign_in"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/server_set_up"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="通用设置" />
    </LinearLayout>


    <!-- 占位布局 此处新增一个布局（可以是界面最后一行的布局）
     android:layout_height="0dp"
        android:layout_weight="1"
    -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>
</LinearLayout>

java文件

 @BindView(R.id.context)
    LinearLayout context;

    @SuppressLint("CommitPrefEdits")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        ButterKnife.bind(this);
        UiUtil.generateFootMenu(context, R.id.footer_home);
    }