Android 一种简单的标题栏

使用viewpager+CommonTabLayout上图下文底部导航栏

第一步 导入CommonTabLayout依赖

implementation ‘com.flyco.tablayout:FlycoTabLayout_Lib:2.0.2@aar’

第二步 创建布局

// An highlighted block
<?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:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <androidx.viewpager.widget.ViewPager
        android:layout_weight="1"
        android:id="@+id/vp"
        android:layout_height="0dp"
        android:layout_width="match_parent">
    </androidx.viewpager.widget.ViewPager>
    <com.flyco.tablayout.CommonTabLayout
        android:layout_width="match_parent"
        android:id="@+id/tab"
        app:tl_textSelectColor="#0077F3"
        app:tl_textUnselectColor="#000"
        android:layout_height="50dp">
    </com.flyco.tablayout.CommonTabLayout>

</LinearLayout>

第三步 创建一个类实现CustomTabEntity接口

// An highlighted block
/**
 * @author 
 * @description: 封装的CustomTabEntityDemo类
 * @date 
 */
public class CustomTabEntityDemo implements CustomTabEntity {
    
    
    private String tab;
    private int SelectedIcon;
    private int TabUnselectedIcon;

    public CustomTabEntityDemo(String tab, int selectedIcon, int tabUnselectedIcon) {
    
    
        this.tab = tab;
        SelectedIcon = selectedIcon;
        TabUnselectedIcon = tabUnselectedIcon;
    }

    @Override
    public String getTabTitle() {
    
    
        return tab;
    }

    @Override
    public int getTabSelectedIcon() {
    
    
        return SelectedIcon;
    }

    @Override
    public int getTabUnselectedIcon() {
    
    
        return TabUnselectedIcon;
    }
}

第四步 在activity中关联起来

// An highlighted block
package com.zywl.myapplication;

import android.os.Bundle;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentPagerAdapter;
import androidx.viewpager.widget.ViewPager;

import com.flyco.tablayout.CommonTabLayout;
import com.flyco.tablayout.listener.CustomTabEntity;
import com.flyco.tablayout.listener.OnTabSelectListener;
import com.zywl.myapplication.fragment.FirstFragment;
import com.zywl.myapplication.fragment.SecondFragment;
import com.zywl.myapplication.fragment.ThirdFragment;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * 上图下文   主页面
 */
public class MainActivity extends AppCompatActivity {
    
    

    private ViewPager vp;
    private CommonTabLayout tab;
    //创建fragment集合
    private List<Fragment> flist=new ArrayList<>();
    private ArrayList<CustomTabEntity> Clist=new ArrayList<>();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //找控件
        vp = findViewById(R.id.vp);
        tab = findViewById(R.id.tab);
        //添加集合
        flist.add(new FirstFragment());
        flist.add(new SecondFragment());
        flist.add(new ThirdFragment());
        //获取到封装的对象然后把数据存进去
        CustomTabEntityDemo c1 = new CustomTabEntityDemo("第一页", R.mipmap.ic_launcher, R.mipmap.ic_launcher_round);
        CustomTabEntityDemo c2 = new CustomTabEntityDemo("第二页", R.mipmap.ic_launcher, R.mipmap.ic_launcher_round);
        CustomTabEntityDemo c3 = new CustomTabEntityDemo("第三页", R.mipmap.ic_launcher, R.mipmap.ic_launcher_round);
        //把创建好的对象存放到集合中
        Clist.add(c1);
        Clist.add(c2);
        Clist.add(c3);
        //CommonTabLayout 与ViewPage 进行关联
        tab.setTabData(Clist);
        //设置viewpager适配器
        vp.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
    
    
            @Override
            public Fragment getItem(int position) {
    
    
                return flist.get(position);
            }

            @Override
            public int getCount() {
    
    
                return flist.size();
            }
        });
        //
        //设置CommonTabLayout 点击时间
        tab.setOnTabSelectListener(new OnTabSelectListener() {
    
    
            @Override
            public void onTabSelect(int position) {
    
    
                vp.setCurrentItem(position);
            }

            @Override
            public void onTabReselect(int position) {
    
    

            }
        });
        //设置viewpager滑动事件
        vp.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
    
    
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    
    

            }

            @Override
            public void onPageSelected(int position) {
    
    
                tab.setCurrentTab(position);
            }

            @Override
            public void onPageScrollStateChanged(int state) {
    
    

            }
        });
    }



}

第五步 最终效果