ViewPager实现程序引导界面

<FrameLayout 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"
tools:context="com.example.viewpagertest.MainActivity" >

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

<LinearLayout
android:layout_width="40dp"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center"
android:paddingBottom="20dp" >

<ImageView
android:id="@+id/dot1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/page_indicator_focused" />

<ImageView
android:id="@+id/dot2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/page_indicator_unfocused" />

<ImageView
android:id="@+id/dot3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/page_indicator_unfocused" />

<ImageView
android:id="@+id/dot4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/page_indicator_unfocused" />

</LinearLayout>

</FrameLayout>

package com.example.viewpagertest;

import java.util.ArrayList;
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.View;
import android.view.ViewGroup;
import android.widget.ImageView;

public class MainActivity extends Activity implements OnPageChangeListener {

private ViewPager viewPager;
private ArrayList<View> views = new ArrayList<View>();
private ImageView imgDot1, imgDot2, imgDot3, imgDot4;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.viewpager);
initImgDots();
initViews();
viewPager.setAdapter(new MyPagerAdapter(views));

viewPager.setOnPageChangeListener(this);
}

/**
* 加载小圆点
*/
private void initImgDots() {
// TODO Auto-generated method stub
imgDot1 = (ImageView) findViewById(R.id.dot1);
imgDot2 = (ImageView) findViewById(R.id.dot2);
imgDot3 = (ImageView) findViewById(R.id.dot3);
imgDot4 = (ImageView) findViewById(R.id.dot4);
}

// 加载视图
private void initViews() {
views.add(getLayoutInflater().inflate(R.layout.layout_1, null));
views.add(getLayoutInflater().inflate(R.layout.layout_2, null));
views.add(getLayoutInflater().inflate(R.layout.layout_3, null));
views.add(getLayoutInflater().inflate(R.layout.layout_4, null));
}

class MyPagerAdapter extends PagerAdapter {

private ArrayList<View> views;

public MyPagerAdapter(ArrayList<View> views) {
this.views = views;
}

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

// 实例化选项卡
public Object instantiateItem(ViewGroup container, int position) {
View v = views.get(position);
container.addView(v);
return v;
}

// 删除选项卡
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(views.get(position));

}

// 判断视图是否为返回的对象
public boolean isViewFromObject(View view, Object o) {
// TODO Auto-generated method stub
return view == o;
}

// 至少要实现以上四个方法：getCount、instantiateItem、destroyItem、isViewFromObject

}

/*
* (non-Javadoc)
*
* @see android.support.v4.view.ViewPager.OnPageChangeListener#
* onPageScrollStateChanged(int)
*/
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub

}

/*
* (non-Javadoc)
*
* @see
* android.support.v4.view.ViewPager.OnPageChangeListener#onPageScrolled
* (int, float, int)
*/
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub

}

/*
* (non-Javadoc)
*
* @see
* android.support.v4.view.ViewPager.OnPageChangeListener#onPageSelected
* (int)
*/
@Override
public void onPageSelected(int position) {

//判断当前选项卡位置，所在位置小圆点设置为选中，其他为未选中
if (viewPager.getCurrentItem() == 1) {
imgDot2.setImageResource(R.drawable.page_indicator_focused);
imgDot3.setImageResource(R.drawable.page_indicator_unfocused);
imgDot4.setImageResource(R.drawable.page_indicator_unfocused);
imgDot1.setImageResource(R.drawable.page_indicator_unfocused);
} else if (viewPager.getCurrentItem() == 2) {
imgDot3.setImageResource(R.drawable.page_indicator_focused);
imgDot1.setImageResource(R.drawable.page_indicator_unfocused);
imgDot2.setImageResource(R.drawable.page_indicator_unfocused);
imgDot4.setImageResource(R.drawable.page_indicator_unfocused);
} else if (viewPager.getCurrentItem() == 3) {
imgDot4.setImageResource(R.drawable.page_indicator_focused);
imgDot1.setImageResource(R.drawable.page_indicator_unfocused);
imgDot2.setImageResource(R.drawable.page_indicator_unfocused);
imgDot3.setImageResource(R.drawable.page_indicator_unfocused);
} else if (viewPager.getCurrentItem() == 0) {
imgDot1.setImageResource(R.drawable.page_indicator_focused);
imgDot2.setImageResource(R.drawable.page_indicator_unfocused);
imgDot3.setImageResource(R.drawable.page_indicator_unfocused);
imgDot4.setImageResource(R.drawable.page_indicator_unfocused);
}

}

}

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

<ImageView
android:id="@+id/img4"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="@drawable/d" />

<Button
android:id="@+id/btn_enter"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:text="开启新世界"
android:layout_gravity="bottom|center"
android:layout_marginBottom="50dp"/>

</FrameLayout>