实现页面切换（动画效果实现，不用ViewPager）

源代码地址 http://download.csdn.net/detail/u013210620/8791687

先看主页面布局activity_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#d1d1d1"
    android:orientation="vertical" >

    <RelativeLayout
        android:id="@+id/list_layout_visible"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="0dp" >
    </RelativeLayout>

    <!-- tab三选项 -->

    <LinearLayout
        android:id="@+id/mainTab"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:background="@drawable/bottom_bg"
        android:orientation="horizontal" >

        <ImageView
            android:id="@+id/iv_tab_communication"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/bottom_sms_p" />

        <ImageView
            android:id="@+id/iv_tab_contacts"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/bottom_contacts_p" />

        <ImageView
            android:id="@+id/iv_tab_dail"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/bottom_dial_p" />

        <ImageView
            android:id="@+id/iv_tab_temp"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/bottom_dial_p"
            android:visibility="gone" />
    </LinearLayout>

</RelativeLayout>

再看代码块（有凝视）

package com.example.commonpager;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;

public class MainActivity extends Activity implements OnClickListener {
	/** 内容区域 */
	private RelativeLayout list_layout_visible;
	/** Tab4键 */
	private LinearLayout mainTab;
	private ImageView iv_tab_communication, iv_tab_contacts, iv_tab_dail,iv_tab_temp;
	/** 当前的Tab键 */
	private ImageView middleTab;
	/**页面载入器*/
	private LayoutInflater mLayoutInflater;
	/**初始化布局view*/
	private View mBaseLayoutView;
	private boolean isStartAnimation = true;

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

	private void initView() {
		mLayoutInflater = LayoutInflater.from(this);
		mBaseLayoutView = mLayoutInflater.inflate(R.layout.activity_main, null);
		// 获取
		list_layout_visible = (RelativeLayout) mBaseLayoutView
				.findViewById(R.id.list_layout_visible);
		mainTab = (LinearLayout) mBaseLayoutView.findViewById(R.id.mainTab);
		iv_tab_communication = (ImageView) mBaseLayoutView
				.findViewById(R.id.iv_tab_communication);
		iv_tab_contacts = (ImageView) mBaseLayoutView
				.findViewById(R.id.iv_tab_contacts);
		iv_tab_dail = (ImageView) mBaseLayoutView
				.findViewById(R.id.iv_tab_dail);
		iv_tab_temp = (ImageView) mBaseLayoutView
				.findViewById(R.id.iv_tab_temp);
		/**动态载入布局文件*/
		mLayoutInflater.inflate(R.layout.content_contacts, list_layout_visible);
		//展现页面
		setContentView(mBaseLayoutView);
		//设置监听事件
		iv_tab_communication.setOnClickListener(this);
		iv_tab_contacts.setOnClickListener(this);
		iv_tab_dail.setOnClickListener(this);
		//初始化当前按键是contact按键
		middleTab = iv_tab_contacts;
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		/***思路同iv_tab_contacts*/
		case R.id.iv_tab_communication:
			if (middleTab == iv_tab_communication) {
				return;
			}
			list_layout_visible.removeAllViews();
			mLayoutInflater.inflate(R.layout.content_msg, list_layout_visible);
			startAnimation(iv_tab_communication);
			break;
		case R.id.iv_tab_contacts:
			//初始化点击通讯录按键，不做处理事件，直接返回
			if (middleTab == iv_tab_contacts) {
				return;
			}
			//假设载入过之前的消息或者拨号界面。先removeall界面，然后在载入通讯录界面
			list_layout_visible.removeAllViews();
			mLayoutInflater.inflate(R.layout.content_contacts,
					list_layout_visible);
			//载入通讯录界面时候。启动动画效果
			startAnimation(iv_tab_contacts);
			break;
			/***思路同iv_tab_contacts*/
		case R.id.iv_tab_dail:
			if (middleTab == iv_tab_dail) {
				return;
			}
			list_layout_visible.removeAllViews();
			mLayoutInflater.inflate(R.layout.content_dail, list_layout_visible);
			startAnimation(iv_tab_dail);
			break;
		default:
			break;
		}
	}

	private void startAnimation(final ImageView clickTab) {
		ImageView otherTab = null;
		float otherTab_start, otherTab_end;
		float tempTab_start, tempTab_end;
		// 消息不在中间，没点击信息
		if (iv_tab_communication != clickTab
				&& iv_tab_communication != middleTab) {
			otherTab = iv_tab_communication;
		}
		if (iv_tab_contacts != clickTab && iv_tab_contacts != middleTab) {
			otherTab = iv_tab_contacts;
		}
		if (iv_tab_dail != clickTab && iv_tab_dail != middleTab) {
			otherTab = iv_tab_dail;
		}
		setbottomView();

		iv_tab_temp.setBackground(null);
		iv_tab_temp.setBackground(otherTab.getBackground());

		if (otherTab.getX() > middleTab.getX()) {
			otherTab_start = clickTab.getX()
					- (otherTab.getX() - middleTab.getX());
			otherTab_end = clickTab.getX();
			tempTab_start = otherTab.getX();
			tempTab_end = otherTab.getX()
					+ (otherTab.getX() - middleTab.getX());
		} else {
			otherTab_start = clickTab.getX()
					+ (clickTab.getX() - middleTab.getX());
			otherTab_end = clickTab.getX();
			tempTab_start = otherTab.getX();
			tempTab_end = otherTab.getX()
					- (clickTab.getX() - middleTab.getX());
		}

		AnimatorSet set = new AnimatorSet();
		set.playTogether(ObjectAnimator.ofFloat(clickTab, "x", clickTab.getX(),
				middleTab.getX()), ObjectAnimator.ofFloat(middleTab, "x",
				middleTab.getX(), otherTab.getX()), ObjectAnimator.ofFloat(
				iv_tab_temp, "x", tempTab_start, tempTab_end), ObjectAnimator
				.ofFloat(otherTab, "x", otherTab_start, otherTab_end));

		set.addListener(new AnimatorListenerAdapter() {
			@Override
			public void onAnimationEnd(Animator anim) {
			}

			@Override
			public void onAnimationStart(Animator anim) {
				middleTab = clickTab;
			}
		});
		set.setDuration(1 * 600).start();
	}

	private void setbottomView() {

		DisplayMetrics metrics = new DisplayMetrics();
		getWindowManager().getDefaultDisplay().getMetrics(metrics);
		int width = metrics.widthPixels;// 屏幕的宽dp
		LinearLayout.LayoutParams para;
		para = (LinearLayout.LayoutParams) iv_tab_communication
				.getLayoutParams();
		para.width = width / 3;
		para.weight = 0;
		iv_tab_communication.setLayoutParams(para);

		para = (LinearLayout.LayoutParams) iv_tab_contacts.getLayoutParams();
		para.width = width / 3;
		para.weight = 0;
		iv_tab_contacts.setLayoutParams(para);

		para = (LinearLayout.LayoutParams) iv_tab_dail.getLayoutParams();
		para.width = width / 3;
		para.weight = 0;
		iv_tab_dail.setLayoutParams(para);

		para = (LinearLayout.LayoutParams) iv_tab_temp.getLayoutParams();
		para.width = width / 3;
		para.weight = 0;
		iv_tab_temp.setVisibility(View.VISIBLE);

	}

}

然后是3个Tab键相应的測试页面

content_contacts.xml

<?

xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tv_tip_no_record"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginTop="14dp"
    android:shadowDx="0"
    android:shadowDy="2"
    android:shadowRadius="2"
    android:text="contact!!!"
    android:textColor="#888"
    android:textSize="20dp"
    android:typeface="sans" />

content_msg.xml

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

>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/tv_tip_no_record"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="14dp"
        android:shadowDx="0"
        android:shadowDy="2"
        android:shadowRadius="2"
        android:text="msg!!!"
        android:textColor="#888"
        android:textSize="20dp"
        android:typeface="sans" />

</RelativeLayout>

content_dail.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/tv_tip_no_record"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="14dp"
        android:shadowDx="0"
        android:shadowDy="2"
        android:shadowRadius="2"
        android:text="msg!!!"
        android:textColor="#888"
        android:textSize="20dp"
        android:typeface="sans" />

</RelativeLayout>