ViewPager和Fragment的组合使用

 如图是效果图用的是Viewpager和fragment来实现的主界面

不过其中的预加载我没有解决

如下是代码代码比较简单

package com.ithello.dingding;

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

import com.ithello.dingding.fragment.FourFragment;
import com.ithello.dingding.fragment.OneFragment;
import com.ithello.dingding.fragment.ThreeFragment;
import com.ithello.dingding.fragment.TwoFragment;

import android.os.Bundle;
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.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.ImageView;

/**
 * 主界面
 * 
 * @author zh
 * 
 */
public class MhomeActivity extends FragmentActivity implements OnClickListener {
    private ImageView imageView, imageView2, imageView3, imageView4;
    // private Fragment fragment,fragment2,fragment3,fragment4;
    private ViewPager viewPager;
    private List<Fragment> list;

    @Override
    protected void onCreate(Bundle arg0) {
        // TODO Auto-generated method stub
        super.onCreate(arg0);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.homeactivity);
        setView();
        setData();
    }

    private void setView() {
        // TODO Auto-generated method stub
        imageView = (ImageView) findViewById(R.id.iv_message);
        imageView2 = (ImageView) findViewById(R.id.iv_ding);
        imageView3 = (ImageView) findViewById(R.id.iv_work);
        imageView4 = (ImageView) findViewById(R.id.iv_atten);
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        imageView.setOnClickListener(this);
        imageView2.setOnClickListener(this);
        imageView3.setOnClickListener(this);
        imageView4.setOnClickListener(this);
    }

    private void setData() {
        // TODO Auto-generated method stub
//        /**
//         * ViewPager.setOffscreenPageLimit(int
//         * limit)，其中参数可以设为0或者1，参数小于1时，会默认用1来作为参数
//         * ，未设置之前，ViewPager会默认加载两个Fragment。所以，我们只需要调用下它，设置下加载Fragment个数即可。
//         */
//        viewPager.setOffscreenPageLimit(1);
        list = new ArrayList<Fragment>();
        list.add(new OneFragment());
        list.add(new TwoFragment());
        list.add(new ThreeFragment());
        list.add(new FourFragment());

        viewPager.setAdapter(new MyAdapter(getSupportFragmentManager(), list));
        viewPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override
            public void onPageSelected(int arg0) {
                // TODO Auto-generated method stub
                setShow();
                if (arg0 == 0) {
                    imageView.setImageResource(R.drawable.tab_mes_pressed);
                } else if (arg0 == 1) {
                    imageView2.setImageResource(R.drawable.tab_ding_pressed);
                } else if (arg0 == 2) {
                    imageView3.setImageResource(R.drawable.tab_work_pressed);
                } else if (arg0 == 3) {
                    imageView4.setImageResource(R.drawable.tab_attent_pressed);
                }
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
                // TODO Auto-generated method stub

            }
        });

    }

    // 用于在下一次事件前重置控件属性
    protected void setShow() {
        // TODO Auto-generated method stub
        imageView.setImageResource(R.drawable.tab_mes_normal);
        imageView2.setImageResource(R.drawable.tab_ding_normal);
        imageView3.setImageResource(R.drawable.tab_work_normal);
        imageView4.setImageResource(R.drawable.tab_attent_normal);
    }

    /**
     * 点击事件发生时，相关页面跳转 用setCurrent
     * 
     * @param arg0
     */
    @Override
    public void onClick(View arg0) {
        // TODO Auto-generated method stub
        setShow();
        switch (arg0.getId()) {
        case R.id.iv_message:
            viewPager.setCurrentItem(0);
            imageView.setImageResource(R.drawable.tab_mes_pressed);
            break;
        case R.id.iv_ding:
            viewPager.setCurrentItem(1);
            imageView2.setImageResource(R.drawable.tab_ding_pressed);
            break;
        case R.id.iv_work:
            viewPager.setCurrentItem(2);
            imageView3.setImageResource(R.drawable.tab_work_pressed);
            break;
        case R.id.iv_atten:
            viewPager.setCurrentItem(3);
            imageView4.setImageResource(R.drawable.tab_attent_pressed);
            break;

        default:
            break;
        }
    }

    class MyAdapter extends FragmentPagerAdapter {
        List<Fragment> listFragments;

        public MyAdapter(FragmentManager fm, List<Fragment> list) {
            super(fm);
            this.listFragments = list;
            // TODO Auto-generated constructor stub
        }

        @Override
        public Fragment getItem(int arg0) {
            // TODO Auto-generated method stub
            return listFragments.get(arg0);
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return listFragments.size();
        }

    }
}

布局的代码就是一个ViewPager和下面的图片

<?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:orientation="vertical" >

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:background="@drawable/botton_bg"
        android:orientation="horizontal" >

        <ImageView
            android:id="@+id/iv_message"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:contentDescription="@null"
            android:paddingTop="5dp"
            android:scaleType="fitCenter"
            android:src="@drawable/tab_mes_pressed" />

        <ImageView
            android:id="@+id/iv_ding"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:contentDescription="@null"
            android:paddingTop="5dp"
            android:scaleType="fitCenter"
            android:src="@drawable/tab_ding_normal" />

        <ImageView
            android:id="@+id/iv_work"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:contentDescription="@null"
            android:paddingTop="5dp"
            android:scaleType="fitCenter"
            android:src="@drawable/tab_work_normal" />

        <ImageView
            android:id="@+id/iv_atten"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:contentDescription="@null"
            android:paddingTop="5dp"
            android:scaleType="fitCenter"
            android:src="@drawable/tab_attent_normal" />
    </LinearLayout>

</LinearLayout>

还有4个fragment，我都还没有实现功能

package com.ithello.dingding.fragment;

import com.ithello.dingding.R;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;



public class OneFragment extends Fragment{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        return inflater.inflate(R.layout.onefragment, container, false);
    }
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onActivityCreated(savedInstanceState);
        System.out.println("1");
    }
    
}