CommonTabLayout+ViewPager快速完成APP首页搭建

款APP开始的时候往往少不了多页面的切换，这就涉及到viewpager的使用，以前往往用Google自带的效果去实现，比较麻烦不说，后面做出来的效果还不如人意。

下面就利用CommonTabLayout+ViewPager来实现类似各电商APP首页的效果；

搭建很简单，第一步，新建一个工程。在build.gradle里面加入下面的引用：

compile 'com.flyco.roundview:FlycoRoundView_Lib:1.1.2@aar'
compile 'com.flyco.tablayout:FlycoTabLayout_Lib:1.5.0@aar'
compile 'com.android.support:design:24.2.1'compile 'com.nineoldandroids:library:2.4.0'

这样就能使用CommTabLayout插件了；

下面是activity_main.xml文件，我在里面加入了一个FloatingActionButton。

<?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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

        <android.support.v4.view.ViewPager
            android:id="@+id/view_main"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/float_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignParentRight="true"
            android:layout_marginBottom="10dp"
            android:layout_marginRight="10dp"
            app:backgroundTint="#FFFFFF"
           android:background="@drawable/ic_arrow_drop_down_black_24dp"/>
    </RelativeLayout>

    <com.flyco.tablayout.CommonTabLayout
        android:id="@+id/tab_main"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:background="#FFFFFF"
        app:tl_iconGravity="LEFT"
        app:tl_iconHeight="20dp"
        app:tl_iconMargin="5dp"
        app:tl_iconWidth="20dp"
        app:tl_indicator_bounce_enable="false"
        app:tl_indicator_color="@color/colorPrimary"
        app:tl_indicator_gravity="TOP"
        app:tl_textSelectColor="@color/colorPrimary"
        app:tl_textUnselectColor="#DDD"
        app:tl_textsize="15sp"
        app:tl_underline_color="#DDDDDD"
        app:tl_underline_gravity="TOP"
        app:tl_underline_height="1dp"/>

</LinearLayout>

先创建几个fagment用来做viewPager的元素，我在viewPager里面加了三个fragment，都是非常简单的布局；这些fragment继承了我自己创建的一个BaseFragment；

BaseFragment

package com.learn.bob.testfragmentadapter;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;

public class BaseFragment extends Fragment {

    public int dialogTheme;

    public Context mContext;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public void onPause() {
        super.onPause();
    }

    @Override
    public void onResume() {
        super.onResume();
    }

}

package com.learn.bob.testfragmentadapter;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * Created by Administrator on 2018/1/7.
 */

public class ThirdFragment extends BaseFragment {

    private Context mContext;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        mContext = getActivity();
        return inflater.inflate(R.layout.fragment_thirdd, container, false);
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        initView();
    }

    private void initView(){

    }
}

下面是MainActivity，

package com.learn.bob.testfragmentadapter;

import android.support.design.widget.FloatingActionButton;
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 android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import com.flyco.tablayout.CommonTabLayout;
import com.flyco.tablayout.listener.CustomTabEntity;
import com.flyco.tablayout.listener.OnTabSelectListener;

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

public class MainActivity extends AppCompatActivity{

    private ViewPager mViewPager;
    private CommonTabLayout mTab;
    private FirstFragment firstFragment;
    private FirstReplaceFragment firstReplaceFragment;
    private SecondFragment secondFragment;
    private ThirdFragment thirdFragment;
    private ViewPagerAadpter viewPagerAadpter;
    private List<BaseFragment> fragmentList;
    private ArrayList<CustomTabEntity> mTabEntities = new ArrayList<>();
    private FloatingActionButton mBtn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView(){
        mViewPager = (ViewPager)findViewById(R.id.view_main);
        mTab = (CommonTabLayout) findViewById(R.id.tab_main);
        mBtn = (FloatingActionButton)findViewById(R.id.float_button);

        mBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(null != firstFragment){
                    // Toast.makeText(MainActivity.this,"点击了",Toast.LENGTH_LONG).show();

                }
            }
        });

        if(null == fragmentList){
            fragmentList = new ArrayList<BaseFragment>();
        }

        if(null  == firstFragment){
            firstFragment = new FirstFragment();
            fragmentList.add(firstFragment);
            mTabEntities.add(new TabEntity("首页",R.mipmap.ic_launcher,R.mipmap.ic_launcher));
        }

        if(null == secondFragment){
            secondFragment = new SecondFragment();
            fragmentList.add(secondFragment);
            mTabEntities.add(new TabEntity("扉页",R.mipmap.ic_launcher,R.mipmap.ic_launcher));
        }

        if(null == thirdFragment){
            thirdFragment = new ThirdFragment();
            fragmentList.add(thirdFragment);
            mTabEntities.add(new TabEntity("尾页",R.mipmap.ic_launcher,R.mipmap.ic_launcher));
        }

        viewPagerAadpter = new ViewPagerAadpter(getSupportFragmentManager(),fragmentList);
        mViewPager.setAdapter(viewPagerAadpter);
        mTab.setTabData(mTabEntities);

        mViewPager.setOffscreenPageLimit(3);

//为tab页的点击添加监听事件
        mTab.setOnTabSelectListener(new OnTabSelectListener() {
            @Override
            public void onTabSelect(int position) {
                mViewPager.setCurrentItem(position);
            }

            @Override
            public void onTabReselect(int position) {

            }
        });

//为viewPager的滑动添加监听事件
        mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

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

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

    }

//viewPager的适配器
    private class ViewPagerAadpter extends FragmentPagerAdapter{

        private List<BaseFragment> fragments;
        private FragmentManager fragmentManager;

        public ViewPagerAadpter(FragmentManager fm, List<BaseFragment> fragmentList) {
            super(fm);
            this.fragments = fragmentList;
            this.fragmentManager = fm;
        }

        @Override
        public Fragment getItem(int position) {
            return fragments.get(position);
        }

        @Override
        public int getCount() {
            return fragments.size();
        }
    }

}

在CusstommonTabEntity的基础上我添加了一个TabEntity的实体类来定义我的tab页；

package com.learn.bob.testfragmentadapter;

import com.flyco.tablayout.listener.CustomTabEntity;

/**
 * Created by bob on 2017-4-12 14:37
 */

public class TabEntity implements CustomTabEntity {
    public String title;
    public int selectedIcon;
    public int unSelectedIcon;

    public TabEntity(String title, int selectedIcon, int unSelectedIcon) {
        this.title = title;
        this.selectedIcon = selectedIcon;
        this.unSelectedIcon = unSelectedIcon;
    }
    public TabEntity(String title) {
        this.title = title;
    }

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

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

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

这是最终的效果，在xml里面能够设置下面tab页滑动时线条文字显示的颜色，也可以设置成无线条

项目GitHub地址：https://github.com/bobLion/TestFragmentAdapte.git