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：

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

实现：

1.下载jar包
2.添加Maven

 <dependency>   <groupId>com.ashokvarma.android</groupId>   <artifactId>bottom-navigation-bar</artifactId>   <version>1.2.0</version>   <type>pom</type> </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<Fragment> 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<Fragment> getFragments() {         ArrayList<Fragment> 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

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

MODE_FIXED+BACKGROUND_STYLE_RIPPLE效果

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

MODE_SHIFTING+BACKGROUND_STYLE_STATIC效果

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

MODE_SHIFTING+BACKGROUND_STYLE_RIPPLE效果

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

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：

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