Android学习之BottomNavigationBar实现Android特色底部导航栏

Android底部导航栏的实现方式特别多，例如TabHost，TabLayout，或者TextView等，都可以实现底部导航栏的效果，但是却没有Google官方统一的导航栏样式，今天讲的就是Google最近添加到Material design中的底部导航栏BottomNavigationBar，也可以说是现今Android底部导航栏的一个标准与统一吧。

效果：

实现效果：

实现：

1.下载jar包
2.添加Maven

<dependency>  <groupId>com.ashokvarma.androidgroupId>  <artifactId>bottom-navigation-barartifactId>  <version>1.2.0version>  <type>pomtype>dependency>

3.添加依赖。

compile 'com.ashokvarma.android:bottom-navigation-bar:1.2.0'

4.添加Ivy

<dependency org='com.ashokvarma.android' name='bottom-navigation-bar' rev='1.2.0'>  <artifact name='$AID' ext='pom'>artifact>dependency>

布局设置

<?xml version="1.0" encoding="utf-8"?><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:orientation="vertical"    tools:context="com.example.wangchang.testbottomnavigationbar.MainActivity">    <FrameLayout        android:id="@+id/layFrame"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1" />    <com.ashokvarma.bottomnavigation.BottomNavigationBar        android:id="@+id/bottom_navigation_bar"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_gravity="bottom" />LinearLayout>

这个很简单，不用详叙。

主页面实现:

package com.example.wangchang.testbottomnavigationbar;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentTransaction;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import com.ashokvarma.bottomnavigation.BottomNavigationBar;import com.ashokvarma.bottomnavigation.BottomNavigationItem;import java.util.ArrayList;public class MainActivity extends AppCompatActivity implements BottomNavigationBar.OnTabSelectedListener {    private ArrayList fragments;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        BottomNavigationBar bottomNavigationBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar);        bottomNavigationBar.setMode(BottomNavigationBar.MODE_FIXED);        bottomNavigationBar                .setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_STATIC                );        bottomNavigationBar.addItem(new BottomNavigationItem(R.mipmap.ic_home_white_24dp, "Home").setActiveColorResource(R.color.orange))                .addItem(new BottomNavigationItem(R.mipmap.ic_book_white_24dp, "Books").setActiveColorResource(R.color.teal))                .addItem(new BottomNavigationItem(R.mipmap.ic_music_note_white_24dp, "Music").setActiveColorResource(R.color.blue))                .addItem(new BottomNavigationItem(R.mipmap.ic_tv_white_24dp, "Movies & TV").setActiveColorResource(R.color.brown))                .addItem(new BottomNavigationItem(R.mipmap.ic_videogame_asset_white_24dp, "Games").setActiveColorResource(R.color.grey))                .setFirstSelectedPosition(0)                .initialise();        fragments = getFragments();        setDefaultFragment();        bottomNavigationBar.setTabSelectedListener(this);    }    /**     * 设置默认的     */    private void setDefaultFragment() {        FragmentManager fm = getSupportFragmentManager();        FragmentTransaction transaction = fm.beginTransaction();        transaction.replace(R.id.layFrame, HomeFragment.newInstance("Home"));        transaction.commit();    }    private ArrayList getFragments() {        ArrayList fragments = new ArrayList<>();        fragments.add(HomeFragment.newInstance("Home"));        fragments.add(BookFragment.newInstance("Books"));        fragments.add(MusicFragment.newInstance("Music"));        fragments.add(TvFragment.newInstance("Movies & TV"));        fragments.add(GameFragment.newInstance("Games"));        return fragments;    }    @Override    public void onTabSelected(int position) {        if (fragments != null) {            if (position < fragments.size()) {                FragmentManager fm = getSupportFragmentManager();                FragmentTransaction ft = fm.beginTransaction();                Fragment fragment = fragments.get(position);                if (fragment.isAdded()) {                    ft.replace(R.id.layFrame, fragment);                } else {                    ft.add(R.id.layFrame, fragment);                }                ft.commitAllowingStateLoss();            }        }    }    @Override    public void onTabUnselected(int position) {        if (fragments != null) {            if (position < fragments.size()) {                FragmentManager fm = getSupportFragmentManager();                FragmentTransaction ft = fm.beginTransaction();                Fragment fragment = fragments.get(position);                ft.remove(fragment);                ft.commitAllowingStateLoss();            }        }    }    @Override    public void onTabReselected(int position) {    }}

这里主要注意一下Fragment的填充方式，静态工厂构造方法。

bottomNavigationBar                .addItem(new BottomNavigationItem(R.drawable.ic_home_white_24dp, "Home"))                .addItem(new BottomNavigationItem(R.drawable.ic_book_white_24dp, "Books"))                .addItem(new BottomNavigationItem(R.drawable.ic_music_note_white_24dp, "Music"))                .addItem(new BottomNavigationItem(R.drawable.ic_tv_white_24dp, "Movies & TV"))                .addItem(new BottomNavigationItem(R.drawable.ic_videogame_asset_white_24dp, "Games"))                .initialise();

bottomNavigationBar添加选项。

  bottomNavigationBar.setTabSelectedListener(new BottomNavigationBar.OnTabSelectedListener(){            @Override            public void onTabSelected(int position) {            }            @Override            public void onTabUnselected(int position) {            }            @Override            public void onTabReselected(int position) {            }        });

bottomNavigationBar设置监听选项点击事件setTabSelectedListener。

设置导航栏模式

Attribute: bnbMode Values: mode_default, mode_fixed, mode_shifting
Method: setMode() Values:MODE_DEFAULT, MODE_FIXED, MODE_SHIFTING

分别是属性或者代码设置

 bottomNavigationBar.setMode(BottomNavigationBar.MODE_FIXED)；

设置导航栏背景模式

Attribute: background_style_default, background_style_static, background_style_ripple

Method:BACKGROUND_STYLE_DEFAULT,BACKGROUND_STYLE_STATIC, BACKGROUND_STYLE_RIPPLE

 bottomNavigationBar            .setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_RIPPLE)

MODE_FIXED+BACKGROUND_STYLE_STATIC效果

MODE_FIXED+BACKGROUND_STYLE_RIPPLE效果

MODE_SHIFTING+BACKGROUND_STYLE_STATIC效果

MODE_SHIFTING+BACKGROUND_STYLE_RIPPLE效果

值得一提，模式跟背景的设置都要在添加tab前面，不然不会有效果。

颜色设置

Attributes: bnbActiveColor, bnbInactiveColor, bnbBackgroundColor Value: Color value or resource
Methods: setActiveColor, setInActiveColor, setBarBackgroundColor Value: Color value or resource

 bottomNavigationBar.setActiveColor(R.color.primary).setInActiveColor("#FFFFFF").setBarBackgroundColor("#ECECEC")

in-active color : is the icon and text color of the in-active/un-selected tab

是图标和文字的颜色（选中/未选中）

active color : In BACKGROUND_STYLE_STATIC active color is the icon and text color of the active/selected tab. In BACKGROUND_STYLE_RIPPLE active color is the bottom bar background color (which comes with ripple animation)

在BACKGROUND_STYLE_STATIC 模式下颜色是图标和文字的颜色（选中/未选中），在BACKGROUND_STYLE_RIPPLE 模式下是底部导航栏背景色。

background color : In BACKGROUND_STYLE_STATIC background color is the bottom bar background color. In BACKGROUND_STYLE_RIPPLE background color is the icon and text color of the active/selected tab.

在BACKGROUND_STYLE_STATIC 模式下颜色是底部导航栏背景色，BACKGROUND_STYLE_RIPPLE模式下是图标和文字的颜色（选中/未选中）

默认颜色：

Default colors:
1. Theme’s Primary Color will be active color.
2. Color.LTGRAY will be in-active color.
3. Color.WHITE will be background color.

1.主题的PrimaryColor将是active color
2.Color.LTGRAY（灰色）是 in-active color
3.白色是背景色

代码示例：

        bottomNavigationBar                .addItem(new BottomNavigationItem(R.drawable.ic_home_white_24dp, "Home").setActiveColor(R.color.orange).setInActiveColor(R.color.teal))                .addItem(new BottomNavigationItem(R.drawable.ic_book_white_24dp, "Books").setActiveColor("#FFFF00"))                .addItem(new BottomNavigationItem(R.drawable.ic_music_note_white_24dp, "Music").setInActiveColor("#00FFFF"))                .addItem(new BottomNavigationItem(R.drawable.ic_tv_white_24dp, "Movies & TV"))                .addItem(new BottomNavigationItem(R.drawable.ic_videogame_asset_white_24dp, "Games").setActiveColor(R.color.grey))

添加标记

  BadgeItem numberBadgeItem = new BadgeItem()                .setBorderWidth(4)                .setBackgroundColorResource(R.color.blue)                .setText("5")                .setHideOnSelect(autoHide.isChecked());     bottomNavigationBar                .addItem(new BottomNavigationItem(R.drawable.ic_home_white_24dp, "Home").setActiveColorResource(R.color.orange).setBadgeItem(numberBadgeItem))

效果：

很棒吧，功能很全，效果很nice！

代码下载：
http://pan.baidu.com/s/1eR4DzGY

github地址：
https://github.com/Ashok-Varma/BottomNavigation

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