2，view_tab_item.xml

<?xml version="1.0" encoding="utf-8"?>        

3，BottomTabBaseActivity.java

package com.gyq.topbarfast;import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentPagerAdapter;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.view.View;import com.gyq.topbarfast.view.BottomTabView;import java.util.List;public abstract class BottomTabBaseActivity extends AppCompatActivity {    private BottomTabView bottomTabView;    private FragmentPagerAdapter mAdapter;    private ViewPager mViewPager;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_bottom_tab_base);        bottomTabView = (BottomTabView)findViewById(R.id.bottom_tab_view);        mViewPager = (ViewPager)findViewById(R.id.viewPager);        if (getCenterView() == null) {            bottomTabView.setTabItemViews(getTabViews());        }else {            bottomTabView.setTabItemViews(getTabViews(),getCenterView());        }        mAdapter = new FragmentPagerAdapter(getSupportFragmentManager()) {            @Override            public Fragment getItem(int position) {                return getFragments().get(position);            }            @Override            public int getCount() {                return getFragments().size();            }        };        mViewPager.setAdapter(mAdapter);        bottomTabView.setOnTabItemSelectListener(new BottomTabView.OnTabItemSelectListener() {            @Override            public void onTabItemSelect(int position) {                mViewPager.setCurrentItem(position,true);            }        });        mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {            @Override            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {            }            @Override            public void onPageSelected(int position) {                bottomTabView.updatePosition(position);   //bottomtab同步切换选中位置            }            @Override            public void onPageScrollStateChanged(int state) {            }        });    }    protected abstract List getTabViews();    protected abstract List getFragments();    protected View getCenterView() {        return null;    }}

5，activity_bottom_tab_base.xml布局文件：

<?xml version="1.0" encoding="utf-8"?>            

6，MainActivity.java

package com.gyq.topbarfast;import android.support.v4.app.Fragment;import android.view.View;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.Toast;import com.gyq.topbarfast.fragment.ClassifyFragment;import com.gyq.topbarfast.fragment.FindFragment;import com.gyq.topbarfast.fragment.HomeFragment;import com.gyq.topbarfast.fragment.MineFragment;import com.gyq.topbarfast.view.BottomTabView;import java.util.ArrayList;import java.util.List;public class MainActivity extends BottomTabBaseActivity {    @Override    protected List getTabViews() {        List tabItemViews = new ArrayList<>();        tabItemViews.add(new BottomTabView.TabItemView(this,"首页",R.color.bottom_text_nor,                R.color.bottom_text_pre,R.drawable.ic_home_norl,R.drawable.ic_home_pre));        tabItemViews.add(new BottomTabView.TabItemView(this,"分类",R.color.bottom_text_nor,                R.color.bottom_text_pre,R.drawable.ic_classify_nor,R.drawable.ic_classify_pre));        tabItemViews.add(new BottomTabView.TabItemView(this,"发现",R.color.bottom_text_nor,                R.color.bottom_text_pre,R.drawable.ic_find_nor,R.drawable.ic_find_pre));         //第二效果        /*tabItemViews.add(new BottomTabView.TabItemView(this,"购物车",R.color.bottom_text_nor,                R.color.bottom_text_pre,R.drawable.ic_car_nor,R.drawable.ic_car_pre));*/        tabItemViews.add(new BottomTabView.TabItemView(this,"我的",R.color.bottom_text_nor,                R.color.bottom_text_pre,R.drawable.ic_mine_noe,R.drawable.ic_mine_pre));        return tabItemViews;    }    @Override    protected List getFragments() {        List fragments = new ArrayList<>();        fragments.add(new HomeFragment());        fragments.add(new ClassifyFragment());        fragments.add(new FindFragment());        //第二效果        /*fragments.add(new ShopCarFragment());*/        fragments.add(new MineFragment());        return fragments;    }    @Override    protected View getCenterView() {    //较灵活的一种方法        /*View centerView = LayoutInflater.from(this).inflate(R.layout.center_view, null);        centerView.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Toast.makeText(MainActivity.this,"中间图标被点击了",Toast.LENGTH_SHORT).show();            }        });        return centerView;*/        ImageView centerView = new ImageView(this);        centerView.setImageResource(R.mipmap.ic_launcher_round);        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(200,200);        params.leftMargin = 60;        params.rightMargin = 60;        params.bottomMargin = 0;        centerView.setLayoutParams(params);        centerView.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Toast.makeText(MainActivity.this,"中间图标被点击了",Toast.LENGTH_SHORT).show();            }        });        return centerView;    }}

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