Android实战简易教程-第二十六枪（基于ViewPager实现微信页面切换效果）

1.头部布局文件top.xml:

<?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="40dp"
    android:background="@drawable/title_bar"
    android:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="30dp"
        android:layout_gravity="center"
        android:text="WeChat"
        android:textColor="#ffffffff"
        android:textSize="25dp" />

</LinearLayout>

2.底部布局文件bottom.xml:

<?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="50dp"
    android:background="@drawable/bottom_bar"
    android:orientation="horizontal" >

    <LinearLayout
        android:id="@+id/ll_chat"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" >

        <ImageButton
            android:id="@+id/ibtn_chat"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#0000"
            android:clickable="false"
            android:src="@drawable/tab_weixin_pressed" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="聊天"
            android:textColor="#ffffffff" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/ll_pengyouquan"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" >

        <ImageButton
            android:id="@+id/ibtn_pengyouquan"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#0000"
            android:clickable="false"
            android:src="@drawable/tab_find_frd_normal" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="朋友圈"
            android:textColor="#ffffffff" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/ll_tongxunlu"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" >

        <ImageButton
            android:id="@+id/ibtn_tongxunlu"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#0000"
            android:clickable="false"
            android:src="@drawable/tab_address_normal" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="好友"
            android:textColor="#ffffffff" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/ll_set"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" >

        <ImageButton
            android:id="@+id/ibtn_set"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#0000"
            android:clickable="false"
            android:src="@drawable/tab_settings_normal" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="设置"
            android:textColor="#ffffffff" />
    </LinearLayout>

</LinearLayout>

3.主布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

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

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

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

</LinearLayout>

4.四个ViewPager的内容页布局

tab01.xml:

<?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:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="聊天页"
        android:textSize="30sp" >
    </TextView>

</LinearLayout>

tab02.xml:

<?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:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="朋友圈"
        android:textSize="30sp" >
    </TextView>

</LinearLayout>

tab03.xml:

<?
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:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="联系人页面"
        android:textSize="30sp" >
    </TextView>

</LinearLayout>

tab04.xml:

<?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:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="设置页面"
        android:textSize="30sp" >
    </TextView>

</LinearLayout>

5.MainActivity.java:

package com.example.tabtest;

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

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ImageButton;
import android.widget.LinearLayout;

public class MainActivity extends Activity implements OnClickListener {
	private ViewPager mViewPager;
	private PagerAdapter pagerAdapter;
	private List<View> mViews = new ArrayList<View>();
	private LinearLayout mLLChat;
	private LinearLayout mLLPengyouquan;
	private LinearLayout mLLAddress;
	private LinearLayout mLLSet;
	private ImageButton mImageButtonChat;
	private ImageButton mImageButtonPengyouquan;
	private ImageButton mImageButtonAddress;
	private ImageButton mImageButtonSet;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);
		initView();// 初始化控件
		initEvent();// 点击事件
	}

	private void initEvent() {
		mLLChat.setOnClickListener(this);
		mLLPengyouquan.setOnClickListener(this);
		mLLAddress.setOnClickListener(this);
		mLLSet.setOnClickListener(this);
		mViewPager.setOnPageChangeListener(new OnPageChangeListener() {//ViewPager滑动切换监听
			
			@Override
			public void onPageSelected(int arg0) {
				int currentItem=mViewPager.getCurrentItem();
				resetImag();
				switch (currentItem) {
				case 0:
					mImageButtonChat.setImageResource(R.drawable.tab_weixin_pressed);
					break;
				case 1:
					mImageButtonPengyouquan.setImageResource(R.drawable.tab_find_frd_pressed);
					break;
				case 2:
					mImageButtonAddress.setImageResource(R.drawable.tab_address_pressed);
					break;
				case 3:
					mImageButtonSet.setImageResource(R.drawable.tab_settings_pressed);
					break;

				default:
					break;
				}
				
			}
			
			@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
				
			}
		});
	}

	private void initView() {
		/**
		 * 初始化全部控件
		 */
		mViewPager = (ViewPager) findViewById(R.id.viewpager);
		mLLChat = (LinearLayout) findViewById(R.id.ll_chat);
		mLLPengyouquan = (LinearLayout) findViewById(R.id.ll_pengyouquan);
		mLLAddress = (LinearLayout) findViewById(R.id.ll_tongxunlu);
		mLLSet = (LinearLayout) findViewById(R.id.ll_set);
		mImageButtonChat = (ImageButton) findViewById(R.id.ibtn_chat);
		mImageButtonPengyouquan = (ImageButton) findViewById(R.id.ibtn_pengyouquan);
		mImageButtonAddress = (ImageButton) findViewById(R.id.ibtn_tongxunlu);
		mImageButtonSet = (ImageButton) findViewById(R.id.ibtn_set);
		/**
		 * 获取mViews
		 */
		LayoutInflater layoutInflater = LayoutInflater.from(this);
		View tab01 = layoutInflater.inflate(R.layout.tab01, null);
		View tab02 = layoutInflater.inflate(R.layout.tab02, null);
		View tab03 = layoutInflater.inflate(R.layout.tab03, null);
		View tab04 = layoutInflater.inflate(R.layout.tab04, null);
		mViews.add(tab01);
		mViews.add(tab02);
		mViews.add(tab03);
		mViews.add(tab04);
		// ViewPager适配器
		pagerAdapter = new PagerAdapter() {

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

			/**
			 * 初始化
			 */

			@Override
			public Object instantiateItem(ViewGroup container, int position) {
				View view = mViews.get(position);
				container.addView(view);
				return view;
			}

			@Override
			public boolean isViewFromObject(View arg0, Object arg1) {
				return arg0 == arg1;
			}

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

		mViewPager.setAdapter(pagerAdapter);

	}

	@Override
	public void onClick(View v) {
		resetImag();
		switch (v.getId()) {
		case R.id.ll_chat:
			mViewPager.setCurrentItem(0);
			mImageButtonChat.setImageResource(R.drawable.tab_weixin_pressed);
			break;
		case R.id.ll_pengyouquan:
			mViewPager.setCurrentItem(1);
			mImageButtonPengyouquan.setImageResource(R.drawable.tab_find_frd_pressed);

			break;
		case R.id.ll_tongxunlu:
			mViewPager.setCurrentItem(2);
			mImageButtonAddress.setImageResource(R.drawable.tab_address_pressed);

			break;
		case R.id.ll_set:
			mViewPager.setCurrentItem(3);
			mImageButtonSet.setImageResource(R.drawable.tab_settings_pressed);

			break;

		default:
			break;
		}
	}
/**
 * 将全部图片设置成未选中状态
 */
	private void resetImag() {
		mImageButtonChat.setImageResource(R.drawable.tab_weixin_normal);
		mImageButtonPengyouquan.setImageResource(R.drawable.tab_find_frd_normal);
		mImageButtonAddress.setImageResource(R.drawable.tab_address_normal);
		mImageButtonSet.setImageResource(R.drawable.tab_settings_normal);
	}

}

6.执行实例：

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