Android學習之BottomNavigationBar實現Android特點底部導航欄

Android底部導航欄的實現方式特別多，例如TabHost，TabLayout，或者TextView等，均可以實現底部導航欄的效果，可是卻沒有Google官方統一的導航欄樣式，今天講的就是Google最近添加到Material design中的底部導航欄BottomNavigationBar，也能夠說是現今android底部導航欄的一個標準與統一吧。

效果：

實現效果：

實現：

1.下載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>

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3.添加依賴。

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

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4.添加Ivy

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

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佈局設置

<?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>

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這個很簡單，不用詳敘。

主頁面實現:

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);
    }

    /**
     * 設置默認的
     */
    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) {

    }
}

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這裏主要注意一下Fragment的填充方式，靜態工廠構造方法。

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();

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bottomNavigationBar添加選項。

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

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bottomNavigationBar設置監聽選項點擊事件setTabSelectedListener。

設置導航欄模式

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

分別是屬性或者代碼設置

bottomNavigationBar
.setMode(BottomNavigationBar.MODE_FIXED)；

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設置導航欄背景模式

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)

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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，模式跟背景的設置都要在添加tab前面，否則不會有效果。

顏色設置

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")

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

是圖標和文字的顏色（選中/未選中）

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 模式下顏色是圖標和文字的顏色（選中/未選中），在BACKGROUND_STYLE_RIPPLE 模式下是底部導航欄背景色。

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 模式下顏色是底部導航欄背景色，BACKGROUND_STYLE_RIPPLE模式下是圖標和文字的顏色（選中/未選中）

默認顏色：

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.主題的PrimaryColor將是active color 
2.Color.LTGRAY（灰色）是 in-active color 
3.白色是背景色

代碼示例：

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))

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添加標記

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))

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效果：

很棒吧，功能很全，效果很nice！

代碼下載： 
http://pan.baidu.com/s/1eR4DzGY

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