Android BottomNavigationBar底部導航控制器使用方法詳解

2020-01-02 06:58:43

字體：大中小

來源：轉載

供稿：網友

最近Google在自己推出的Material design中增加了Bottom Navigation導航控制。Android一直沒有官方的導航控制器，自己實現確實是五花八門，有了這個規定之后，就類似蘋果的底部Toolbar，以后我們的APP就會有一致的風格，先看一張效果：

這是官方在Material design中給出一張圖，確實很不錯。

1.BottomNavigationBar的下載地址

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

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布局實現

 <com.ashokvarma.bottomnavigation.BottomNavigationBar android:layout_gravity="bottom" android:id="@+id/bottom_navigation_bar" android:layout_width="match_parent" android:layout_height="wrap_content"/>

2.3類中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設置事件監聽器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.案例的實現

布局文件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:showIn="@layout/activity_navigation_view_demo" tools:context="com.lidong.demo.navigation_view.BottomNavigationBarDemoActivity"> <LinearLayout android:id="@+id/tb" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" /> <com.ashokvarma.bottomnavigation.BottomNavigationBar android:id="@+id/bottom_navigation_bar" android:layout_width="match_parent" android:layout_alignParentBottom="true" android:layout_height="wrap_content"/></RelativeLayout>

Activity的代碼：

package com.lidong.demo.navigation_view;import android.app.FragmentManager;import android.app.FragmentTransaction;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.util.Log;import com.ashokvarma.bottomnavigation.BottomNavigationBar;import com.ashokvarma.bottomnavigation.BottomNavigationItem;import com.lidong.demo.R;/** * BottomNavigationBar實現 */public class BottomNavigationBarDemoActivity extends AppCompatActivity implements BottomNavigationBar.OnTabSelectedListener { private BottomNavigationBar bottomNavigationBar; int lastSelectedPosition = 0; private String TAG = BottomNavigationBarDemoActivity.class.getSimpleName(); private LocationFragment mLocationFragment; private FindFragment mFindFragment; private FavoritesFragment mFavoritesFragment; private BookFragment mBookFragment; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_navigation_view_demo); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); bottomNavigationBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar); bottomNavigationBar .addItem(new BottomNavigationItem(R.mipmap.ic_location_on_white_24dp, "位置").setActiveColor(R.color.orange)) .addItem(new BottomNavigationItem(R.mipmap.ic_find_replace_white_24dp, "發現").setActiveColor(R.color.blue)) .addItem(new BottomNavigationItem(R.mipmap.ic_favorite_white_24dp, "愛好").setActiveColor(R.color.green)) .addItem(new BottomNavigationItem(R.mipmap.ic_book_white_24dp, "圖書").setActiveColor(R.color.blue)) .setFirstSelectedPosition(lastSelectedPosition ) .initialise(); bottomNavigationBar.setTabSelectedListener(this); setDefaultFragment(); } /** * 設置默認的 */ private void setDefaultFragment() { FragmentManager fm = getFragmentManager(); FragmentTransaction transaction = fm.beginTransaction(); mLocationFragment = LocationFragment.newInstance("位置"); transaction.replace(R.id.tabs, mLocationFragment); transaction.commit(); } @Override public void onTabSelected(int position) { Log.d(TAG, "onTabSelected() called with: " + "position = [" + position + "]"); FragmentManager fm = this.getFragmentManager(); //開啟事務 FragmentTransaction transaction = fm.beginTransaction(); switch (position) { case 0: if (mLocationFragment == null) {  mLocationFragment = LocationFragment.newInstance("位置"); } transaction.replace(R.id.tb, mLocationFragment); break; case 1: if (mFindFragment == null) {  mFindFragment = FindFragment.newInstance("發現"); } transaction.replace(R.id.tb, mFindFragment); break; case 2: if (mFavoritesFragment == null) {  mFavoritesFragment = FavoritesFragment.newInstance("愛好"); } transaction.replace(R.id.tb, mFavoritesFragment); break; case 3: if (mBookFragment == null) {  mBookFragment = BookFragment.newInstance("圖書"); } transaction.replace(R.id.tb, mBookFragment); break; default: break; } // 事務提交 transaction.commit(); } @Override public void onTabUnselected(int position) { Log.d(TAG, "onTabUnselected() called with: " + "position = [" + position + "]"); } @Override public void onTabReselected(int position) { }}

fragment的代碼

package com.lidong.demo.navigation_view;import android.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import com.lidong.demo.R;public class LocationFragment extends Fragment { public static LocationFragment newInstance(String param1) { LocationFragment fragment = new LocationFragment(); Bundle args = new Bundle(); args.putString("agrs1", param1); fragment.setArguments(args); return fragment; } public LocationFragment() { } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container,  Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_location, container, false); Bundle bundle = getArguments(); String agrs1 = bundle.getString("agrs1"); TextView tv = (TextView)view.findViewById(R.id.tv_location); tv.setText(agrs1); return view; }}

代碼下載：https://github.com/lidong1665/AndroidRapidLibrary

代碼實現起來很簡單，就加載布局，添加BottomNavigationItem，設置TabChangeListener就這三步搞定底部導航控制器。