Android应用开发Android：BottomNavigationBar如何实现底部导航栏-职坐标

Android应用开发Android：BottomNavigationBar如何实现底部导航栏

白羽 2019-05-20 来源：网络阅读 1586 评论 0

摘要：本文将带你了解Android应用开发Android：BottomNavigationBar如何实现底部导航栏，希望本文对大家学Android有所帮助。

本文将带你了解Android应用开发Android：BottomNavigationBar如何实现底部导航栏，希望本文对大家学Android有所帮助。

Android应用开发Android：BottomNavigationBar如何实现底部导航栏

1.BottomNavigationBar的下载地址
2.使用的方法
2.1在Gradle中添加
compile ‘com.ashokvarma.android:bottom-navigation-bar:0.9.5’

2.2布局实现

2.3类中Activity中添加BottomNavigationItem

BottomNavigationBar bottomNavigationBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar);

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();
2.4设置事件监听器TabChangeListener

bottomNavigationBar.setTabSelectedListener(new BottomNavigationBar.OnTabSelectedListener(){
           @Override
           public void onTabSelected(int position) {
           }
           @Override
           public void onTabUnselected(int position) {]
           }
           @Override
           public void onTabReselected(int position) {
           }
       });
3.展示
MODE_FIXED+BACKGROUND_STYLE_STATIC效果

\

DE_FIXED+BACKGROUND_STYLE_RIPPLE效果

\

MODE_SHIFTING+BACKGROUND_STYLE_STATIC效果

\

MODE_SHIFTING+BACKGROUND_STYLE_RIPPLE效果

\

4.代码实现
package com.android.xiaobai;

import android.os.Bundle;
import android.support.annotation.Nullable;
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.util.Log;

import com.ashokvarma.bottomnavigation.BottomNavigationBar;
import com.ashokvarma.bottomnavigation.BottomNavigationItem;

import java.util.ArrayList;

import fragment.ContactsFragment;
import fragment.DongtaiFragment;
import fragment.MsgFragment;

/**
* Created by xiaobai on 2018/1/31/031.
*/

public class MessageActivity extends AppCompatActivity implements BottomNavigationBar.OnTabSelectedListener {
    private ArrayList

fragments;
    private BottomNavigationBar bottomNavigationBar;
    private MsgFragment msgFragment;
    private ContactsFragment contactsFragment;
    private DongtaiFragment dongtaiFragment;
    private FragmentManager fragmentManager;
    private FragmentTransaction transaction;
    int lastSelectedPosition = 0;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activty_message);

        bottomNavigationBar = findViewById(R.id.bottom_navigation_bar);
        init();
    }

    private void init() {
        //要先设计模式后再添加图标！
        //设置按钮模式 MODE_FIXED表示固定   MODE_SHIFTING表示转移
        bottomNavigationBar.setMode(BottomNavigationBar.MODE_FIXED);
        //设置背景风格
        // BACKGROUND_STYLE_STATIC表示静态的
        //BACKGROUND_STYLE_RIPPLE表示涟漪的，也就是可以变化的，跟随setActiveColor里面的颜色变化
        bottomNavigationBar.setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_RIPPLE);
        //添加并设置图标、图标的颜色和文字
        bottomNavigationBar
                .addItem(new BottomNavigationItem(R.drawable.im_botton_message, 消息)).setActiveColor(R.color.blue)
                .addItem(new BottomNavigationItem(R.drawable.im_botton_contacts, 联系人)).setActiveColor(R.color.red)
                .addItem(new BottomNavigationItem(R.drawable.im_botton_dongtai, 动态)).setActiveColor(R.color.orign)
                .setFirstSelectedPosition(lastSelectedPosition )
                .initialise();

        bottomNavigationBar.setTabSelectedListener(this);
        setDefaultFragment();
    }

    //设置初始界面
    private void setDefaultFragment() {
        fragmentManager = getSupportFragmentManager();
        transaction = fragmentManager.beginTransaction();
        transaction.replace(R.id.layFrame, MsgFragment.newInstance(消息));
        transaction.commit();
    }

    @Override
    public void onTabSelected(int position) {
        fragmentManager = getSupportFragmentManager();
        transaction = fragmentManager.beginTransaction();
        switch (position) {
            case 0:
                if (msgFragment == null) {
                    msgFragment = MsgFragment.newInstance(位置);
                }
                transaction.replace(R.id.layFrame, msgFragment);
                break;
            case 1:
                if (contactsFragment == null) {
                    contactsFragment = ContactsFragment.newInstance(位置);
                }
                transaction.replace(R.id.layFrame, contactsFragment);
                break;
            case 2:
                if (dongtaiFragment ==

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