Android ViewPager欢迎页+引导页+进入首页

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.os.Handler;

/** 欢迎界面 */
public class WelcomeAct extends Activity {

    private boolean isFirstIn = false;
    private static final int TIME = 2000;
    private static final int GO_HOME = 1000;
    private static final int GO_GUIDE = 1001;

    private Handler mHandler = new Handler() {
        public void handleMessage(android.os.Message msg) {
            switch (msg.what) {
            // 跳入主界面
            case GO_HOME:
                goHome();
                break;
            // 跳入引导页
            case GO_GUIDE:
                goGuide();
                break;
            }
        };
    };

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

    private void init() {
        SharedPreferences perPreferences = getSharedPreferences("jike",
                MODE_PRIVATE);
        isFirstIn = perPreferences.getBoolean("isFirstIn", true);
        if (!isFirstIn) {
            mHandler.sendEmptyMessageDelayed(GO_HOME, TIME);
        } else {
            mHandler.sendEmptyMessageDelayed(GO_GUIDE, TIME);
            Editor editor = perPreferences.edit();
            editor.putBoolean("isFirstIn", false);
            editor.commit();
        }
    }

    private void goHome() {
        Intent i = new Intent(WelcomeAct.this, MainActivity.class);
        startActivity(i);
        finish();
    }

    private void goGuide() {
        Intent i = new Intent(WelcomeAct.this, Guide.class);
        startActivity(i);
        finish();
    }

}

import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
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.widget.Button;
import android.widget.ImageView;

/** 引导页 */
public class Guide extends Activity implements OnPageChangeListener {

    private ViewPager vp;
    private ViewPagerAdapter vpAdapter;
    private List<View> views;
    private ImageView[] dots;
    private int[] ids = { R.id.iv1, R.id.iv2, R.id.iv3 };
    private Button start_btn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.guide);
        initViews();
        initDots();
    }

    private void initViews() {
        LayoutInflater inflater = LayoutInflater.from(this);

        views = new ArrayList<View>();
        views.add(inflater.inflate(R.layout.one, null));
        views.add(inflater.inflate(R.layout.two, null));
        views.add(inflater.inflate(R.layout.three, null));

        vpAdapter = new ViewPagerAdapter(views, this);
        vp = (ViewPager) findViewById(R.id.viewpager);
        vp.setAdapter(vpAdapter);
        // 下标从0开始，所以第三个页面是get(2)。
        start_btn = (Button) views.get(2).findViewById(R.id.start_btn);
        start_btn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent i = new Intent(Guide.this, MainActivity.class);
                startActivity(i);
                finish();
            }
        });
        vp.setOnPageChangeListener(this);
    }

    /** 循环设置点 */
    private void initDots() {
        dots = new ImageView[views.size()];
        for (int i = 0; i < views.size(); i++) {
            dots[i] = (ImageView) findViewById(ids[i]);
        }
    }

    @Override  /** 滑动状态改变的时候 */
    public void onPageScrollStateChanged(int arg0) {
        // TODO Auto-generated method stub
    }

    @Override  /** 当页面被滑动时候调用 */
    public void onPageScrolled(int arg0, float arg1, int arg2) {
        // TODO Auto-generated method stub
    }

    @Override  /** 当前新的页面被选中时调用 */
    public void onPageSelected(int arg0) {
        for (int i = 0; i < ids.length; i++) {
            if (arg0 == i) {
                // 亮点
                dots[i].setImageResource(R.drawable.login_point_selected);
            } else {
                // 暗点
                dots[i].setImageResource(R.drawable.login_point);
            }
        }
    }

}

<?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.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="#00000000" >
    </android.support.v4.view.ViewPager>

    <!-- 底部三个点 -->
    <LinearLayout
        android:id="@+id/ll"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:gravity="center_horizontal"
        android:orientation="horizontal" >
        <!-- 选中点 -->
        <ImageView
            android:id="@+id/iv1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/login_point_selected" />
        <!-- 未选中点 -->
        <ImageView
            android:id="@+id/iv2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/login_point" />
        <!-- 未选中点 -->
        <ImageView
            android:id="@+id/iv3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/login_point" />
    </LinearLayout>

</RelativeLayout>

DEMO下载：http://pan.baidu.com/s/1i3vHoLv