本文(争取做到)android 最全的底部导航栏实现方法.
现在写了4个主要方法.
还有一些个人感觉不完全切题的方法也会简单介绍一下.
方法一. ViewPager + List<View> + PagerAdapter
先看activity_main.xml
- <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" >
- <LinearLayout
- android:layout_width="match_parent"
- android:layout_height="45dp"
- android:background="#0E6DB0"
- android:gravity="center"
- android:orientation="vertical" >
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_gravity="center"
- android:text="@string/app_name"
- android:textColor="#ffffff"
- android:textSize="20sp"
- android:textStyle="bold" />
- </LinearLayout>
- <android.support.v4.view.ViewPager
- android:id="@+id/viewPager"
- android:layout_width="match_parent"
- android:layout_height="0dp"
- android:layout_weight="1" >
- </android.support.v4.view.ViewPager>
- <LinearLayout
- android:layout_width="match_parent"
- android:layout_height="55dp"
- android:background="#0E6DB0"
- android:orientation="horizontal" >
- <LinearLayout
- android:id="@+id/llChat"
- android:layout_width="0dp"
- android:layout_height="match_parent"
- android:layout_weight="1"
- android:gravity="center"
- android:orientation="vertical" >
- <ImageView
- android:id="@+id/ivChat"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="#00000000"
- android:src="@drawable/tab_chat" />
- <TextView
- android:id="@+id/tvChat"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="微信"
- android:textColor="@drawable/tab_textview" />
- </LinearLayout>
- <LinearLayout
- android:id="@+id/llFriends"
- android:layout_width="0dp"
- android:layout_height="match_parent"
- android:layout_weight="1"
- android:gravity="center"
- android:orientation="vertical" >
- <ImageView
- android:id="@+id/ivFriends"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="#00000000"
- android:src="@drawable/tab_friends" />
- <TextView
- android:id="@+id/tvFriends"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="朋友"
- android:textColor="@drawable/tab_textview" />
- </LinearLayout>
- <LinearLayout
- android:id="@+id/llContacts"
- android:layout_width="0dp"
- android:layout_height="match_parent"
- android:layout_weight="1"
- android:gravity="center"
- android:orientation="vertical" >
- <ImageView
- android:id="@+id/ivContacts"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="#00000000"
- android:src="@drawable/tab_contacts" />
- <TextView
- android:id="@+id/tvContacts"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="通讯录"
- android:textColor="@drawable/tab_textview" />
- </LinearLayout>
- <LinearLayout
- android:id="@+id/llSettings"
- android:layout_width="0dp"
- android:layout_height="match_parent"
- android:layout_weight="1"
- android:gravity="center"
- android:orientation="vertical" >
- <ImageView
- android:id="@+id/ivSettings"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="#00000000"
- android:src="@drawable/tab_setting" />
- <TextView
- android:id="@+id/tvSettings"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="设置"
- android:textColor="@drawable/tab_textview" />
- </LinearLayout>
- </LinearLayout>
- </LinearLayout>
说明一:还有另一种方式是用RadioGroup的方式,但是那种方式如果以后要包含小红点提醒或者右上角数字角标提醒,就不好灵活的修改了.所以本文忽略那种方法.
说明二:底部导航栏的4个ImageView使用的src, TextView使用的textColor都是seletor
然后看MainActivity.java
- package com.yao.tab01;
- import java.util.ArrayList;
- import java.util.List;
- import android.app.Activity;
- import android.os.Bundle;
- import android.support.v4.view.ViewPager;
- import android.support.v4.view.ViewPager.OnPageChangeListener;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.view.Window;
- import android.widget.ImageView;
- import android.widget.LinearLayout;
- import android.widget.TextView;
- public class MainActivity extends Activity implements OnClickListener {
- private List<View> views = new ArrayList<View>();
- private ViewPager viewPager;
- private LinearLayout llChat, llFriends, llContacts, llSettings;
- private ImageView ivChat, ivFriends, ivContacts, ivSettings, ivCurrent;
- private TextView tvChat, tvFriends, tvContacts, tvSettings, tvCurrent;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- requestWindowFeature(Window.FEATURE_NO_TITLE);
- setContentView(R.layout.activity_main);
- initView();
- initData();
- }
- private void initView() {
- viewPager = (ViewPager) findViewById(R.id.viewPager);
- llChat = (LinearLayout) findViewById(R.id.llChat);
- llFriends = (LinearLayout) findViewById(R.id.llFriends);
- llContacts = (LinearLayout) findViewById(R.id.llContacts);
- llSettings = (LinearLayout) findViewById(R.id.llSettings);
- llChat.setOnClickListener(this);
- llFriends.setOnClickListener(this);
- llContacts.setOnClickListener(this);
- llSettings.setOnClickListener(this);
- ivChat = (ImageView) findViewById(R.id.ivChat);
- ivFriends = (ImageView) findViewById(R.id.ivFriends);
- ivContacts = (ImageView) findViewById(R.id.ivContacts);
- ivSettings = (ImageView) findViewById(R.id.ivSettings);
- tvChat = (TextView) findViewById(R.id.tvChat);
- tvFriends = (TextView) findViewById(R.id.tvFriends);
- tvContacts = (TextView) findViewById(R.id.tvContacts);
- tvSettings = (TextView) findViewById(R.id.tvSettings);
- ivChat.setSelected(true);
- tvChat.setSelected(true);
- ivCurrent = ivChat;
- tvCurrent = tvChat;
- viewPager.setOnPageChangeListener(new OnPageChangeListener() {
- @Override
- public void onPageSelected(int position) {
- changeTab(position);
- }
- @Override
- public void onPageScrolled(int arg0, float arg1, int arg2) {
- }
- @Override
- public void onPageScrollStateChanged(int arg0) {
- }
- });
- }
- private void initData() {
- LayoutInflater mInflater = LayoutInflater.from(this);
- View tab01 = mInflater.inflate(R.layout.tab01, null);
- View tab02 = mInflater.inflate(R.layout.tab02, null);
- View tab03 = mInflater.inflate(R.layout.tab03, null);
- View tab04 = mInflater.inflate(R.layout.tab04, null);
- views.add(tab01);
- views.add(tab02);
- views.add(tab03);
- views.add(tab04);
- MyPagerAdapter adapter = new MyPagerAdapter(views);
- viewPager.setAdapter(adapter);
- }
- @Override
- public void onClick(View v) {
- changeTab(v.getId());
- }
- private void changeTab(int id) {
- ivCurrent.setSelected(false);
- tvCurrent.setSelected(false);
- switch (id) {
- case R.id.llChat:
- viewPager.setCurrentItem(0);
- case 0:
- ivChat.setSelected(true);
- ivCurrent = ivChat;
- tvChat.setSelected(true);
- tvCurrent = tvChat;
- break;
- case R.id.llFriends:
- viewPager.setCurrentItem(1);
- case 1:
- ivFriends.setSelected(true);
- ivCurrent = ivFriends;
- tvFriends.setSelected(true);
- tvCurrent = tvFriends;
- break;
- case R.id.llContacts:
- viewPager.setCurrentItem(2);
- case 2:
- ivContacts.setSelected(true);
- ivCurrent = ivContacts;
- tvContacts.setSelected(true);
- tvCurrent = tvContacts;
- break;
- case R.id.llSettings:
- viewPager.setCurrentItem(3);
- case 3:
- ivSettings.setSelected(true);
- ivCurrent = ivSettings;
- tvSettings.setSelected(true);
- tvCurrent = tvSettings;
- break;
- default:
- break;
- }
- }
- }
这种方法一的方式就是提前用mInflater.inflate4个View丢到PagerAdapter里面,再给ViewPager设置Adapter
然后把点击底部Tab的事件和滑动ViewPager的事件(主要包括图片和文字seletor切换)整合在一起.
方法二. ViewPager + List<Fragment> + FragmentPagerAdapter或FragmentStatePagerAdapter
这种方法就很常见了
activity_main.xml和上文一样.
我们看MainActivity.java
- package com.yao.tab02;
- import java.util.ArrayList;
- import java.util.List;
- import android.app.Activity;
- import android.app.Fragment;
- import android.os.Bundle;
- import android.support.v4.view.ViewPager;
- import android.support.v4.view.ViewPager.OnPageChangeListener;
- import android.view.View;
- import android.view.Window;
- import android.view.View.OnClickListener;
- import android.widget.ImageView;
- import android.widget.LinearLayout;
- import android.widget.TextView;
- public class MainActivity extends Activity implements OnClickListener {
- private List<Fragment> fragments = new ArrayList<Fragment>();
- private ViewPager viewPager;
- private LinearLayout llChat, llFriends, llContacts, llSettings;
- private ImageView ivChat, ivFriends, ivContacts, ivSettings, ivCurrent;
- private TextView tvChat, tvFriends, tvContacts, tvSettings, tvCurrent;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- requestWindowFeature(Window.FEATURE_NO_TITLE);
- setContentView(R.layout.activity_main);
- initView();
- initData();
- }
- private void initView() {
- viewPager = (ViewPager) findViewById(R.id.viewPager);
- llChat = (LinearLayout) findViewById(R.id.llChat);
- llFriends = (LinearLayout) findViewById(R.id.llFriends);
- llContacts = (LinearLayout) findViewById(R.id.llContacts);
- llSettings = (LinearLayout) findViewById(R.id.llSettings);
- llChat.setOnClickListener(this);
- llFriends.setOnClickListener(this);
- llContacts.setOnClickListener(this);
- llSettings.setOnClickListener(this);
- ivChat = (ImageView) findViewById(R.id.ivChat);
- ivFriends = (ImageView) findViewById(R.id.ivFriends);
- ivContacts = (ImageView) findViewById(R.id.ivContacts);
- ivSettings = (ImageView) findViewById(R.id.ivSettings);
- tvChat = (TextView) findViewById(R.id.tvChat);
- tvFriends = (TextView) findViewById(R.id.tvFriends);
- tvContacts = (TextView) findViewById(R.id.tvContacts);
- tvSettings = (TextView) findViewById(R.id.tvSettings);
- ivChat.setSelected(true);
- tvChat.setSelected(true);
- ivCurrent = ivChat;
- tvCurrent = tvChat;
- viewPager.setOnPageChangeListener(new OnPageChangeListener() {
- @Override
- public void onPageSelected(int position) {
- changeTab(position);
- }
- @Override
- public void onPageScrolled(int arg0, float arg1, int arg2) {
- }
- @Override
- public void onPageScrollStateChanged(int arg0) {
- }
- });
- viewPager.setOffscreenPageLimit(2); //设置向左和向右都缓存limit个页面
- }
- private void initData() {
- Fragment chatFragment = new ChatFragment();
- Fragment friendsFragment = new FriendsFragment();
- Fragment contactsFragment = new ContactsFragment();
- Fragment settingsFragment = new SettingsFragment();
- fragments.add(chatFragment);
- fragments.add(friendsFragment);
- fragments.add(contactsFragment);
- fragments.add(settingsFragment);
- MyFragmentPagerAdapter adapter = new MyFragmentPagerAdapter(getFragmentManager(), fragments);
- // MyFragmentStatePagerAdapter adapter = new MyFragmentStatePagerAdapter(getFragmentManager(), fragments);
- viewPager.setAdapter(adapter);
- }
- @Override
- public void onClick(View v) {
- changeTab(v.getId());
- }
- private void changeTab(int id) {
- ivCurrent.setSelected(false);
- tvCurrent.setSelected(false);
- switch (id) {
- case R.id.llChat:
- viewPager.setCurrentItem(0);
- case 0:
- ivChat.setSelected(true);
- ivCurrent = ivChat;
- tvChat.setSelected(true);
- tvCurrent = tvChat;
- break;
- case R.id.llFriends:
- viewPager.setCurrentItem(1);
- case 1:
- ivFriends.setSelected(true);
- ivCurrent = ivFriends;
- tvFriends.setSelected(true);
- tvCurrent = tvFriends;
- break;
- case R.id.llContacts:
- viewPager.setCurrentItem(2);
- case 2:
- ivContacts.setSelected(true);
- ivCurrent = ivContacts;
- tvContacts.setSelected(true);
- tvCurrent = tvContacts;
- break;
- case R.id.llSettings:
- viewPager.setCurrentItem(3);
- case 3:
- ivSettings.setSelected(true);
- ivCurrent = ivSettings;
- tvSettings.setSelected(true);
- tvCurrent = tvSettings;
- break;
- default:
- break;
- }
- }
- }
1.FragmentStatePagerAdapter : 适合多个界面,类似于listView原理,离开视线就会被回收 会执行onDestroyView方法 onDestroy方法
2.FragmentPagerAdapter : 适合少量界面, 方便滑动 执行onDestroyView方法 不执行onDestroy方法
3.两者都会预先准备好并缓存上一个和下一个Fragment
说明二:重要说明:有个神方法viewPager.setOffscreenPageLimit(2); //设置向左和向右都缓存limit个页面.
我也是很晚才发现有这个方法.下面4个Tab, 只要你设置这个值为3, 那4个Tab永远都会缓存着了.
变态说明:这里告诉大家一个小技巧.ViewPager是V4包里面的.用到的FragmentPagerAdapter和FragmentStatePagerAdapter也是V4包里面的.
如果我们不想用android.support.v4.app.Fragment, 那就可以自己复制出来一个FragmentPagerAdapter,然后把里面的Fragment改成android.app.Fragment.
连带FragmentManager和FragmentTransaction也要改成android.app包下的
跳过方法三,先讲方法四.方法四是代码量最少的方法.简单快捷轻便
item_tab.xml 这个是下面部分4个Tab中其中一个Tab的布局, 以此来FragmentTabHost会帮忙批量生产出4个Tab
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:gravity="center"
- android:orientation="vertical"
- android:padding="5dp" >
- <ImageView
- android:id="@+id/iv"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="#00000000"
- android:src="@drawable/tab_setting" />
- <TextView
- android:id="@+id/tv"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:textColor="@drawable/tab_textview" />
- </LinearLayout>
activity_main.xml
- <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" >
- <LinearLayout
- android:layout_width="match_parent"
- android:layout_height="45dp"
- android:background="#0E6DB0"
- android:gravity="center"
- android:orientation="vertical" >
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_gravity="center"
- android:text="@string/app_name"
- android:textColor="#ffffff"
- android:textSize="20sp"
- android:textStyle="bold" />
- </LinearLayout>
- <FrameLayout
- android:id="@+id/flContainer"
- android:layout_width="match_parent"
- android:layout_height="0dp"
- android:layout_weight="1" >
- </FrameLayout>
- <com.yao.tab04.FragmentTabHost
- android:id="@+id/tabhost"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:background="#0E6DB0" >
- </com.yao.tab04.FragmentTabHost>
- </LinearLayout>
MainActivity.java
- package com.yao.tab04;
- import android.app.Activity;
- import android.os.Bundle;
- import android.util.Log;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.Window;
- import android.widget.ImageView;
- import android.widget.TabHost.OnTabChangeListener;
- import android.widget.TabHost.TabSpec;
- import android.widget.TextView;
- public class MainActivity extends Activity implements OnTabChangeListener {
- private FragmentTabHost tabHost;
- private String[] tabText = { "聊天", "朋友", "通讯录", "设置" };
- private int[] imageRes = new int[] { R.drawable.tab_chat, R.drawable.tab_friends, R.drawable.tab_contacts, R.drawable.tab_setting };
- private Class[] fragments = new Class[] { ChatFragment.class, FriendsFragment.class, ContactsFragment.class, SettingsFragment.class };
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- requestWindowFeature(Window.FEATURE_NO_TITLE);
- setContentView(R.layout.activity_main);
- tabHost = (FragmentTabHost) super.findViewById(R.id.tabhost);
- tabHost.setup(this, super.getFragmentManager(), R.id.flContainer);
- tabHost.getTabWidget().setDividerDrawable(null);
- tabHost.setOnTabChangedListener(this);
- initTab();
- }
- private void initTab() {
- for (int i = 0; i < tabText.length; i++) {
- View view = LayoutInflater.from(this).inflate(R.layout.item_tab, null);
- ((TextView) view.findViewById(R.id.tv)).setText(tabText[i]);
- ((ImageView) view.findViewById(R.id.iv)).setImageResource(imageRes[i]);
- TabSpec tabSpec = tabHost.newTabSpec(tabText[i]).setIndicator(view);
- tabHost.addTab(tabSpec, fragments[i], null);
- tabHost.setTag(i);
- }
- }
- //自动把getCurrentTabView下的所有子View的selected状态设为true. 牛逼!
- @Override
- public void onTabChanged(String tabId) {
- //首次打开自动会调用一下 首次自动输出tabId : 聊天
- Log.e("yao", "tabId : " + tabId);
- // TabWidget tabWidget = tabHost.getTabWidget(); //获取整个底部Tab的布局, 可以通过tabWidget.getChildCount和tabWidget.getChildAt来获取某个子View
- // int pos = tabHost.getCurrentTab(); //获取当前tab的位置
- // View view = tabHost.getCurrentTabView(); //获取当前tab的view
- }
- }
说明一: 重要说明:有些博主还需要写一个未选中的图片ResId数组和一个选中的图片ResId数组.然后根据点击自己在代码上写把图片切换成选中状态.Navie.
你只要传进去一组seletor图片,把文字颜色也设为seletor.FragmentTabHost叼的地方来了.它会自动把图片这个布局View下的所有子控件切换成selected状态.
所以我代码这些相关的逻辑没写,还是会变色.
说明二: 业务逻辑写在onTabChanged. 一般用到的几个核心方法 已经写在上面了
说明三: TabHost好像不能设置导航栏在底部. 所以只能用FragmentTabHost.
说明四: 切到别的页面,当前这个页面会执行到onDestroyView方法,不会执行onDestroy方法.
方法三. 用fragmentTransaction的show和hide方法隐藏和显示Fragment
网上这种代码已有,但是大多数写的很乱.
大致思路整理一下就是如下.
- if (想要的fragment == null) {
- if (当前显示的fragment != null) {
- 隐藏当前fragment
- }
- 生产想要的fragment
- } else if (想要的fragment == 当前显示的fragment) {
- } else {
- 隐藏当前fragment
- 显示想要的fragment
- }
下面看代码.
activity_main.xml
- <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" >
- <LinearLayout
- android:layout_width="match_parent"
- android:layout_height="45dp"
- android:background="#0E6DB0"
- android:gravity="center"
- android:orientation="vertical" >
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_gravity="center"
- android:text="@string/app_name"
- android:textColor="#ffffff"
- android:textSize="20sp"
- android:textStyle="bold" />
- </LinearLayout>
- <FrameLayout
- android:id="@+id/flContainer"
- android:layout_width="match_parent"
- android:layout_height="0dp"
- android:layout_weight="1" >
- </FrameLayout>
- <LinearLayout
- android:layout_width="match_parent"
- android:layout_height="55dp"
- android:background="#0E6DB0"
- android:orientation="horizontal" >
- <LinearLayout
- android:id="@+id/llChat"
- android:layout_width="0dp"
- android:layout_height="match_parent"
- android:layout_weight="1"
- android:gravity="center"
- android:orientation="vertical" >
- <ImageView
- android:id="@+id/ivChat"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="#00000000"
- android:src="@drawable/tab_chat" />
- <TextView
- android:id="@+id/tvChat"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="微信"
- android:textColor="@drawable/tab_textview" />
- </LinearLayout>
- <LinearLayout
- android:id="@+id/llFriends"
- android:layout_width="0dp"
- android:layout_height="match_parent"
- android:layout_weight="1"
- android:gravity="center"
- android:orientation="vertical" >
- <ImageView
- android:id="@+id/ivFriends"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="#00000000"
- android:src="@drawable/tab_friends" />
- <TextView
- android:id="@+id/tvFriends"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="朋友"
- android:textColor="@drawable/tab_textview" />
- </LinearLayout>
- <LinearLayout
- android:id="@+id/llContacts"
- android:layout_width="0dp"
- android:layout_height="match_parent"
- android:layout_weight="1"
- android:gravity="center"
- android:orientation="vertical" >
- <ImageView
- android:id="@+id/ivContacts"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="#00000000"
- android:src="@drawable/tab_contacts" />
- <TextView
- android:id="@+id/tvContacts"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="通讯录"
- android:textColor="@drawable/tab_textview" />
- </LinearLayout>
- <LinearLayout
- android:id="@+id/llSettings"
- android:layout_width="0dp"
- android:layout_height="match_parent"
- android:layout_weight="1"
- android:gravity="center"
- android:orientation="vertical" >
- <ImageView
- android:id="@+id/ivSettings"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="#00000000"
- android:src="@drawable/tab_setting" />
- <TextView
- android:id="@+id/tvSettings"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="设置"
- android:textColor="@drawable/tab_textview" />
- </LinearLayout>
- </LinearLayout>
- </LinearLayout>
本人核心封装
FragmentSwitchTool.java
- /**
- * FileName:FragmentSwitchTool.java
- * Copyright YaoDiWei All Rights Reserved.
- */
- package com.yao.tab03;
- import java.util.ArrayList;
- import java.util.List;
- import android.app.Fragment;
- import android.app.FragmentManager;
- import android.app.FragmentTransaction;
- import android.os.Bundle;
- import android.view.View;
- import android.view.View.OnClickListener;
- /**
- * @author YaoDiWei
- * @version
- */
- public class FragmentSwitchTool implements OnClickListener {
- private FragmentManager fragmentManager;
- private Fragment currentFragment;
- // private View currentClickableView;
- private View[] currentSelectedView;
- private View[] clickableViews; //传入用于被点击的view,比如是一个LinearLayout
- private List<View[]> selectedViews; //传入用于被更改资源selected状态的view[], 比如一组View[]{TextView, ImageView}
- private Class<? extends Fragment>[] fragments;
- private Bundle[] bundles;
- private int containerId;
- private boolean showAnimator;
- public FragmentSwitchTool(FragmentManager fragmentManager, int containerId) {
- super();
- this.fragmentManager = fragmentManager;
- this.containerId = containerId;
- }
- public void setClickableViews(View... clickableViews) {
- this.clickableViews = clickableViews;
- for (View view : clickableViews) {
- view.setOnClickListener(this);
- }
- }
- public void setSelectedViews(List<View[]> selectedViews) {
- this.selectedViews = selectedViews;
- }
- public FragmentSwitchTool addSelectedViews(View... views){
- if (selectedViews == null) {
- selectedViews = new ArrayList<View[]>();
- }
- selectedViews.add(views);
- return this;
- }
- public void setFragments(Class<? extends Fragment>... fragments) {
- this.fragments = fragments;
- }
- public void setBundles(Bundle... bundles) {
- this.bundles = bundles;
- }
- public void changeTag(View v) {
- FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
- Fragment fragment = fragmentManager.findFragmentByTag(String.valueOf(v.getId()));
- for (int i = 0; i < clickableViews.length; i++) {
- if (v.getId() == clickableViews[i].getId()) {
- //过渡动画
- if (showAnimator) {
- int exitIndex = selectedViews.indexOf(currentSelectedView);
- // Log.e("yao", "enter : " + i + " exit: " + exitIndex);
- if (i > exitIndex){
- fragmentTransaction.setCustomAnimations(R.anim.slide_right_in, R.anim.slide_left_out);
- } else if (i < exitIndex) {
- fragmentTransaction.setCustomAnimations(R.anim.slide_left_in, R.anim.slide_right_out);
- }
- }
- //过渡动画
- if (fragment == null) {
- if (currentFragment != null) {
- fragmentTransaction.hide(currentFragment);
- for (View view : currentSelectedView) {
- view.setSelected(false);
- }
- }
- try {
- fragment = fragments[i].newInstance();
- if (bundles != null && bundles[i] != null) {
- fragment.setArguments(bundles[i]);
- }
- } catch (InstantiationException e) {
- e.printStackTrace();
- } catch (IllegalAccessException e) {
- e.printStackTrace();
- }
- fragmentTransaction.add(containerId, fragment, String.valueOf(clickableViews[i].getId()));
- } else if (fragment == currentFragment) {
- } else {
- fragmentTransaction.hide(currentFragment);
- for (View view : currentSelectedView) {
- view.setSelected(false);
- }
- fragmentTransaction.show(fragment);
- }
- fragmentTransaction.commit();
- currentFragment = fragment;
- for (View view : selectedViews.get(i)) {
- view.setSelected(true);
- }
- currentSelectedView = selectedViews.get(i);
- break;
- }
- }
- }
- @Override
- public void onClick(View v)
- {
- changeTag(v);
- }
- }
MainActivity.java
- package com.yao.tab03;
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.View;
- import android.view.Window;
- import android.widget.ImageView;
- import android.widget.LinearLayout;
- import android.widget.TextView;
- public class MainActivity extends Activity{
- private LinearLayout llChat, llFriends, llContacts, llSettings;
- private ImageView ivChat, ivFriends, ivContacts, ivSettings;
- private TextView tvChat, tvFriends, tvContacts, tvSettings;
- private FragmentSwitchTool tool;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- requestWindowFeature(Window.FEATURE_NO_TITLE);
- setContentView(R.layout.activity_main);
- initView();
- tool = new FragmentSwitchTool(getFragmentManager(), R.id.flContainer);
- tool.setClickableViews(llChat, llFriends, llContacts, llSettings);
- tool.addSelectedViews(new View[]{ivChat, tvChat}).addSelectedViews(new View[]{ivFriends, tvFriends})
- .addSelectedViews(new View[]{ivContacts, tvContacts}).addSelectedViews(new View[]{ivSettings, tvSettings});
- tool.setFragments(ChatFragment.class, FriendsFragment.class, ContactsFragment.class, SettingsFragment.class);
- tool.changeTag(llChat);
- }
- private void initView() {
- llChat = (LinearLayout) findViewById(R.id.llChat);
- llFriends = (LinearLayout) findViewById(R.id.llFriends);
- llContacts = (LinearLayout) findViewById(R.id.llContacts);
- llSettings = (LinearLayout) findViewById(R.id.llSettings);
- ivChat = (ImageView) findViewById(R.id.ivChat);
- ivFriends = (ImageView) findViewById(R.id.ivFriends);
- ivContacts = (ImageView) findViewById(R.id.ivContacts);
- ivSettings = (ImageView) findViewById(R.id.ivSettings);
- tvChat = (TextView) findViewById(R.id.tvChat);
- tvFriends = (TextView) findViewById(R.id.tvFriends);
- tvContacts = (TextView) findViewById(R.id.tvContacts);
- tvSettings = (TextView) findViewById(R.id.tvSettings);
- }
- }
说明一: 重要说明:FragmentSwitchTool把所有的操作都封装好在里面了.所以以后只需要写一个布局文件(注意要写成seletor的形式).
在MainActivity中写几行给FragmentSwitchTool的传参就行.
说明二: 过渡动画有点糙,随便写的,可以删掉.
Bottom Navigation是5.0(API level 21)新出的一种符合MD规范的导航栏规范。
注意这里说的是规范,所以当时并没有实现这个BottomNavigation这里有两篇文章可以看看。
原文: https://material.google.com/components/bottom-navigation.html
译文:https://modao.cc/posts/3068
然后在Android Support Library 25 后,Android
终于自己增加了一个控件 android.support.design.widget.BottomNavigationView。用法很简单,你甚至不用去看文档。直接在Android
studio 里新建一个 BottomNavigation 的模板 Activity 就行。
然而官方这个相比网上那三个开源库,动画就相对朴素了。
总结:
方法一:创建就会一次性加载完四个页面.适合简单的页面,比如app一开始的导航页.
方法二:给力的方法.适合能左右滑动的页面.可以自己定制缓存策略.配合神方法,也能一开始就加载全部页面.
方法三:最大的好处是, 用的才加载. 一旦加载就不删除. 切换只用hide和show,速度飞快. 当然你也可以自己定制适合自己的缓存策略.
方法四:简单快捷.代码少.但是切换速度理论不够方法三快.
方法五:符合MD设计的,希望自己的APP炫酷一点的.毫无疑问都应该用BottomNavigation规范的控件。
下载地址:
http://download.csdn.net/detail/alcoholdi/9565976