使用ViewPager实现主界面的布局

先看效果图: 左右拖动可切换Viewpager 点击 下方的item也可以进行切换处理

首先建立布局文件，top.xml，bottom.xml，中间是一个Viewpager实现

 1: top.xml文件 就是一个textview实现的，

 2：bottom.xml文件

<?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="50dip"
    android:orientation="vertical">

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="50dip">

        <LinearLayout
            android:id="@+id/home_layout_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical"
            android:gravity="center">
            <ImageView
                android:id="@+id/home_image_view"
                android:layout_width="20dip"
                android:layout_height="20dip"
                android:src="@drawable/comui_tab_home_selected"
                android:background="#00000000"
                android:layout_gravity="center"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="首页"
                android:layout_gravity="center"
                android:layout_marginTop="5dip"/>

        </LinearLayout>

        <LinearLayout
            android:id="@+id/message_layout_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical"
            android:gravity="center">
            <ImageView
                android:id="@+id/message_image_view"
                android:layout_width="20dip"
                android:layout_height="20dip"
                android:src="@drawable/comui_tab_message"
                android:background="#00000000"
                android:layout_gravity="center"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="消息"
                android:layout_gravity="center"
                android:layout_marginTop="5dip"/>

        </LinearLayout>

        <LinearLayout
            android:id="@+id/person_layout_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical"
            android:gravity="center">
            <ImageView
                android:id="@+id/person_image_view"
                android:layout_width="20dip"
                android:layout_height="20dip"
                android:src="@drawable/comui_tab_person"
                android:background="#00000000"
                android:layout_gravity="center"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="我的"
                android:layout_gravity="center"
                android:layout_marginTop="5dip"/>

        </LinearLayout>

        <LinearLayout
            android:id="@+id/pond_layout_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical"
            android:gravity="center">
            <ImageView
                android:id="@+id/pond_image_view"
                android:layout_width="20dip"
                android:layout_height="20dip"
                android:src="@drawable/comui_tab_pond"
                android:background="#00000000"
                android:layout_gravity="center"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="博客"
                android:layout_gravity="center"
                android:layout_marginTop="5dip"/>
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

最后将这里个文件include进 activity_main中

<?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"
    tools:context="com.yongninggo.application.MainActivity"
    android:orientation="vertical">

    <include layout="@layout/top" />

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1">
    </android.support.v4.view.ViewPager>


    <include layout="@layout/bottom" />

</LinearLayout>

接下来就是mainactivity文件了，先定义xml文件中所有的控件，并获取ID， 初始化4个布局，并写入 给4个image点击事件进行跳转，实现viewpager左右滑动的监听

代码中有注释，我就不一一解释了哈

package com.yongninggo.application;

import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private ViewPager viewPager;

    private PagerAdapter adapter;
    private List<View> views = new ArrayList<View>();

    private LinearLayout home_layout_view;
    private LinearLayout message_layout_view;
    private LinearLayout pond_layout_view;
    private LinearLayout person_layout_view;

    private ImageView home_image_view;
    private ImageView message_image_view;
    private ImageView pond_image_view;
    private ImageView person_image_view;

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

        inisview();
        initEvents();
    }

    private void inisview() {
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        home_layout_view = (LinearLayout) findViewById(R.id.home_layout_view);
        message_layout_view = (LinearLayout) findViewById(R.id.message_layout_view);
        pond_layout_view = (LinearLayout) findViewById(R.id.pond_layout_view);
        person_layout_view = (LinearLayout) findViewById(R.id.person_layout_view);
        home_image_view = (ImageView) findViewById(R.id.home_image_view);
        message_image_view = (ImageView) findViewById(R.id.message_image_view);
        pond_image_view = (ImageView) findViewById(R.id.pond_image_view);
        person_image_view = (ImageView) findViewById(R.id.person_image_view);

        //初始化ViewPager的四个布局
        LayoutInflater inflater = LayoutInflater.from(this);
        View home = inflater.inflate(R.layout.home,null);
        View message = inflater.inflate(R.layout.message,null);
        View pond = inflater.inflate(R.layout.pond,null);
        View person = inflater.inflate(R.layout.person,null);
        views.add(home);
        views.add(message);
        views.add(pond);
        views.add(person);

        adapter = new PagerAdapter() {

            @Override     //初始化item
            public Object instantiateItem(ViewGroup container, int position) {
               View view = views.get(position);
               container.addView(view);
                return view;
            }

            @Override     //摧毁View
            public void destroyItem(ViewGroup container, int position, Object object) {
                container.removeView(views.get(position));
            }

            @Override     //包含View的个数(4个)
            public int getCount() {
                return views.size();
            }

            @Override
            public boolean isViewFromObject(View view, Object object) {
                return view ==object ;
            }
        };
        viewPager.setAdapter(adapter);
    }

    private void initEvents() {
        home_layout_view.setOnClickListener(this);
        message_layout_view.setOnClickListener(this);
        pond_layout_view.setOnClickListener(this);
        person_layout_view.setOnClickListener(this);

        //监听Page变化的匿名类
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                int Currentitem = viewPager.getCurrentItem();
                Resetimg();
                switch (Currentitem){
                    case 0 :
                        home_image_view.setImageResource(R.drawable.comui_tab_home_selected);
                        break;
                    case 1 :
                        message_image_view.setImageResource(R.drawable.comui_tab_message_selected);
                        break;
                    case 2 :
                        person_image_view.setImageResource(R.drawable.comui_tab_person_selected);
                        break;
                    case 3 :
                        pond_image_view.setImageResource(R.drawable.comui_tab_pond_selected);
                        break;
                    default:
                        break;
                }
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
    }

    @Override
    public void onClick(View v) {
        Resetimg();
        switch (v.getId()){
            case R.id.home_layout_view :
                viewPager.setCurrentItem(0); // 表示点击这个layout切换到第一个界面上
                home_image_view.setImageResource(R.drawable.comui_tab_home_selected);
                break;
            case R.id.message_layout_view :
                viewPager.setCurrentItem(1);
                message_image_view.setImageResource(R.drawable.comui_tab_message_selected);
                break;
            case R.id.person_layout_view :
                viewPager.setCurrentItem(2);
                person_image_view.setImageResource(R.drawable.comui_tab_person_selected);
                break;
            case R.id.pond_layout_view :
                viewPager.setCurrentItem(3);
                pond_image_view.setImageResource(R.drawable.comui_tab_pond_selected);
                break;
            default:
                break;
        }
    }

    //将所有的图片切换为暗色的
    private void Resetimg() {
        home_image_view.setImageResource(R.drawable.comui_tab_home);
        message_image_view.setImageResource(R.drawable.comui_tab_message);
        pond_image_view.setImageResource(R.drawable.comui_tab_pond);
        person_image_view.setImageResource(R.drawable.comui_tab_person);
    }
}