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Android 开发过程中,特别是新开的项目,底部状态栏的切换使用的频率非常的高,主要的实现方式有:
(1)、TabLayout + Fragment
(2)、FragmentTabHost + Fragment
(3)、BottomNavigationView + Fragment
(4)、RidioGroup + Fragment
这里我先介绍前面两种实现方式,后面两种后期再贴出实现方式。
一、使用 TabLayout + Fragment + ViewPager 实现
1、实现步骤:
(1)、布局文件中定义 TabLayout 控件
(2)、定义切换的每个 Fragment 布局文件
(3)、定义切换的每个 Fragment 的 Java 类
(4)、定义 TabLayoutMainActivity 类
(5)、效果图演示
2、实现过程:
(1)、布局文件中定义 TabLayout 控件(activity_main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.showly.bottomnavigationbardemo.TabLayoutMainActivity">
<android.support.v4.view.ViewPager
android:id="@+id/viewpager_content_view"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:scrollbars="none" />
<android.support.design.widget.TabLayout
android:id="@+id/tab_layout_view"
android:layout_width="match_parent"
android:layout_height="50dp"
app:tabGravity="fill"
app:tabIndicatorHeight="0dp"
app:tabMode="fixed"
app:tabSelectedTextColor="#FB8081"
app:tabTextColor="#A0A0A0" />
</LinearLayout>
(2)、定义切换的每个 Fragment 布局文件(fragment_frist.xml)
这里有四个 Tab 类别(首页、娱乐、游戏、我的),布局都类似,这里只贴出其中一个
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="首页"
android:textColor="#000"/>
</RelativeLayout>
(3)、定义切换的每个 Fragment 的 Java 类(FristFragment.class)
这里的 Java 类实现方式也相似,贴出其中一个
package com.showly.bottomnavigationbardemo.fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.showly.bottomnavigationbardemo.R;
public class FristFragment extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {View view = inflater.inflate(R.layout.fragment_frist, null);
return view;
}
}
(4)、定义 TabLayoutMainActivity 类(TabLayoutMainActivity.class)
package com.showly.bottomnavigationbardemo;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import com.showly.bottomnavigationbardemo.fragment.FourthlyFragment;
import com.showly.bottomnavigationbardemo.fragment.FristFragment;
import com.showly.bottomnavigationbardemo.fragment.SecondFragment;
import com.showly.bottomnavigationbardemo.fragment.ThirtlyFragment;
public class TabLayoutMainActivity extends AppCompatActivity {
// 未选中的 Tab 图片
private int[] unSelectTabRes = new int[]{R.drawable.i8live_menu_home_normal
, R.drawable.i8live_menu_information_normal, R.drawable.i8live_menu_game_normal, R.drawable.i8live_menu_personl_normal};
// 选中的 Tab 图片
private int[] selectTabRes = new int[]{R.drawable.i8live_menu_home_press, R.drawable.i8live_menu_information_press
, R.drawable.i8live_menu_game_press, R.drawable.i8live_menu_personl_press};
//Tab 标题
private String[] title = new String[]{"首页", "娱乐", "游戏", "我的"};
private ViewPager viewPager;
private TabLayout tabLayout;
private TabLayout.Tab tabAtOne;
private TabLayout.Tab tabAttwo;
private TabLayout.Tab tabAtthree;
private TabLayout.Tab tabAtfour;
@Override
protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);
getSupportActionBar().hide();// 隐藏掉整个 ActionBar
setContentView(R.layout.activity_main);
initView();
initData();
initListener();}
private void initView() {viewPager = (ViewPager) findViewById(R.id.viewpager_content_view);
tabLayout = (TabLayout) findViewById(R.id.tab_layout_view);
// 使用适配器将 ViewPager 与 Fragment 绑定在一起
viewPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager()));
// 将 TabLayout 与 ViewPager 绑定
tabLayout.setupWithViewPager(viewPager);
/* // 设置方式一:// 获取底部的单个 Tab
tabAtOne = tabLayout.getTabAt(0);
tabAttwo = tabLayout.getTabAt(1);
tabAtthree = tabLayout.getTabAt(2);
tabAtfour = tabLayout.getTabAt(3);
// 设置 Tab 图片
tabAtOne.setIcon(R.drawable.i8live_menu_home_press);
tabAttwo.setIcon(R.drawable.i8live_menu_information_normal);
tabAtthree.setIcon(R.drawable.i8live_menu_game_normal);
tabAtfour.setIcon(R.drawable.i8live_menu_personl_normal);*/
// 设置方式二:for (int i = 0; i < title.length; i++) {if (i == 0) {tabLayout.getTabAt(0).setIcon(selectTabRes[0]);
} else {tabLayout.getTabAt(i).setIcon(unSelectTabRes[i]);
}
}
}
private void initData() {}
private void initListener() {
//TabLayout 切换时导航栏图片处理
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {// 选中图片操作
for (int i = 0; i < title.length; i++) {if (tab == tabLayout.getTabAt(i)) {tabLayout.getTabAt(i).setIcon(selectTabRes[i]);
viewPager.setCurrentItem(i);
}
}
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {// 未选中图片操作
for (int i = 0; i < title.length; i++) {if (tab == tabLayout.getTabAt(i)) {tabLayout.getTabAt(i).setIcon(unSelectTabRes[i]);
}
}
}
@Override
public void onTabReselected(TabLayout.Tab tab) {}});
}
// 自定义适配器
public class MyFragmentPagerAdapter extends FragmentPagerAdapter {public MyFragmentPagerAdapter(FragmentManager fm) {super(fm);
}
@Override
public Fragment getItem(int position) {if (position == 1) {return new SecondFragment();// 娱乐
} else if (position == 2) {return new ThirtlyFragment();// 游戏
} else if (position == 3) {return new FourthlyFragment();// 我的
}
return new FristFragment();// 首页}
@Override
public int getCount() {return title.length;}
@Override
public CharSequence getPageTitle(int position) {return title[position];
}
}
}
(5)、效果图演示
二、使用 FragmentTabHost+ Fragment + ViewPager 实现
1、实现步骤:
(1)、布局文件中定义 FragmentTabHost 控件
(2)、定义底部菜单栏布局
(3)、定义切换的每个 Fragment 布局文件
(4)、定义切换的每个 Fragment 的 Java 类
(5)、切换按钮的图片
(6)、定义 FragmentTabHostMainActivity 类
(7)、效果图演示
2、实现过程:
(1)、布局文件中定义 FragmentTabHost 控件(fragment_tabhost_activity.xml)
<?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="match_parent"
android:background="#fff"
android:orientation="vertical">
<android.support.v4.view.ViewPager
android:id="@+id/vp_pager"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:scrollbars="none" />
<android.support.v4.app.FragmentTabHost
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:background="#3000"
android:layout_height="65dp">
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.v4.app.FragmentTabHost>
</LinearLayout>
(2)、定义底部菜单栏布局(tab_content.xml)
<?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="match_parent"
android:padding="2dp"
android:orientation="vertical">
<ImageView
android:id="@+id/iv_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:background="@drawable/i8live_menu_home_normal" />
<TextView
android:id="@+id/tv_item"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="5dp"
android:text="首页" />
</LinearLayout>
(3)、定义切换的每个 Fragment 布局文件(fragment_frist.xml)
这里有四个 Tab 类别(首页、娱乐、游戏、我的),布局都类似,这里只贴出其中一个
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="首页"
android:textColor="#000"/>
</RelativeLayout>
(4)、定义切换的每个 Fragment 的 Java 类(FristFragment.class)
这里的 Java 类实现方式也相似,贴出其中一个
package com.showly.bottomnavigationbardemo.fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.showly.bottomnavigationbardemo.R;
public class FristFragment extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {View view = inflater.inflate(R.layout.fragment_frist, null);
return view;
}
}
(5)、切换按钮的图片 (tab_main.xml)
这里有四个是相似的,只贴出其中一个
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- 切换选中之后的图片 -->
<item android:drawable="@drawable/i8live_menu_home_press" android:state_selected="true"/>
<!-- 未选中的图片 -->
<item android:drawable="@drawable/i8live_menu_home_normal"/>
</selector
(6)、定义 FragmentTabHostMainActivity 类(FragmentTabHostMainActivity.class)
package com.showly.bottomnavigationbardemo;
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTabHost;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TabHost;
import android.widget.TabWidget;
import android.widget.TextView;
import com.showly.bottomnavigationbardemo.fragment.FourthlyFragment;
import com.showly.bottomnavigationbardemo.fragment.FristFragment;
import com.showly.bottomnavigationbardemo.fragment.SecondFragment;
import com.showly.bottomnavigationbardemo.fragment.ThirtlyFragment;
import java.util.ArrayList;
import java.util.List;
public class FragmentTabHostMainActivity extends FragmentActivity implements ViewPager.OnPageChangeListener, TabHost.OnTabChangeListener {private int[] selectTabRes = new int[]{R.drawable.tab_main, R.drawable.tab_infomation
, R.drawable.tab_game, R.drawable.tab_personal};
//Tab 标题
private String[] title = new String[]{"首页", "娱乐", "游戏", "我的"};
private Class fragmentArry[] = {FristFragment.class, SecondFragment.class, ThirtlyFragment.class, FourthlyFragment.class};
private List<Fragment> fragmentList = new ArrayList();
private ViewPager viewPager;
private FragmentTabHost tabHost;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_tabhost_activity);
initView();
initData();
initListener();}
/**
* 初始化 Fragment 并给 ViewPager 添加适配器
*/
private void initVaper() {FristFragment fristFragment = new FristFragment();
SecondFragment secondFragment = new SecondFragment();
ThirtlyFragment thirtlyFragment = new ThirtlyFragment();
FourthlyFragment fourthlyFragment = new FourthlyFragment();
fragmentList.add(fristFragment);
fragmentList.add(secondFragment);
fragmentList.add(thirtlyFragment);
fragmentList.add(fourthlyFragment);
//ViewPager 添加适配器
viewPager.setAdapter(new MyFragmentAdapter(getSupportFragmentManager(), fragmentList));
tabHost.getTabWidget().setDividerDrawable(null);
}
private void initView() {viewPager = (ViewPager) findViewById(R.id.vp_pager);
tabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);// 绑定 tabhost
tabHost.setup(this, getSupportFragmentManager(), R.id.vp_pager);//TabHost 绑定 viewpager
// 获取 item 的个数
int count = title.length;
for (int i = 0; i < count; i++) {
// 设置每个 TabHost 布局
TabHost.TabSpec tabSpec = tabHost.newTabSpec(title[i])
.setIndicator(getTabItemView(i));
//item 与 fragment 关联
tabHost.addTab(tabSpec, fragmentArry[i], null);
tabHost.setTag(i);
}
// 初始化 TabHost 文字颜色
upDateTab(tabHost);
// 给 ViewPager 设置适配器
initVaper();}
/**
* 更新文字颜色。*
* @param mTabHost
*/
private void upDateTab(FragmentTabHost mTabHost) {for (int i = 0; i < mTabHost.getTabWidget().getChildCount(); i++) {TextView tv = (TextView) mTabHost.getTabWidget().getChildAt(i).findViewById(R.id.tv_item);
if (mTabHost.getCurrentTab() == i) {// 选中
tv.setTextColor(Color.parseColor("#FF5959"));
} else {// 不选中
tv.setTextColor(Color.parseColor("#777777"));
}
}
}
/**
* 设置每个 Item 布局
*/
private View getTabItemView(int i) {View view = LayoutInflater.from(this).inflate(R.layout.tab_content, null);
ImageView itemImg = (ImageView) view.findViewById(R.id.iv_imageview);
TextView itemText = (TextView) view.findViewById(R.id.tv_item);
itemImg.setBackgroundResource(selectTabRes[i]);
itemText.setText(title[i]);
return view;
}
private void initData() {}
private void initListener() {viewPager.addOnPageChangeListener(this);
tabHost.setOnTabChangedListener(this);
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { }
@Override
public void onPageSelected(int position) {TabWidget widget = tabHost.getTabWidget();
int oldFocusability = widget.getDescendantFocusability();
widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);// 设置 View 覆盖子类控件而直接获得焦点
tabHost.setCurrentTab(position);// 根据位置 Postion 设置当前的 Tab
widget.setDescendantFocusability(oldFocusability);// 设置取消分割线
}
@Override
public void onPageScrollStateChanged(int state) { }
@Override
public void onTabChanged(String tabId) {int position = tabHost.getCurrentTab();
viewPager.setCurrentItem(position);// 把选中的 Tab 的位置赋给适配器,让它控制页面切换
upDateTab(tabHost);// 设置 TabHost 文字颜色
}
/**
* 适配器
* */
public class MyFragmentAdapter extends FragmentPagerAdapter {
List<Fragment> list;
public MyFragmentAdapter(FragmentManager fm, List<Fragment> list) {super(fm);
this.list = list;
}
@Override
public Fragment getItem(int position) {return list.get(position);
}
@Override
public int getCount() {return list.size();
}
}
}
(7)、效果图演示
三、总结
这两种方式的实现已完成,实现起来相对还是比较简单的,后期有时间会把后面两种的实现方式补上。
Demo 代码地址:底部公众号回复 ” 底部状态栏切换 ” 即可获取。
以下是个人公众号(longxuanzhigu),之后发布的文章会同步到该公众号,方便交流学习 Android 知识及分享个人爱好文章: