引导页面相信大家都不会陌生，安装了一个新的App后第一次打开，都会有类似下图，相当于说明文档
实现效果
程序目录结构
在主layout里main.xml定义一个帧布局，在viewPager上有多少页就显示多少个点
<frameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
.support.v4.view.ViewPager>
</frameLayout>
每一个View的布局pager1.xml
其它两个view类似
在主Activity中
package com.example.viewpagerdemo;
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.widget.ImageView;
public class MainActivity extends Activity {
private ViewPager viewPager = null;
private ImageView img1, img2, img3;
private ArrayList titles;
private int curIndex = -1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initWidgets();
// 把要显示的View装入数组
LayoutInflater li = LayoutInflater.from(this);
View view1 = li.inflate(R.layout.pager1, null);
View view2 = li.inflate(R.layout.pager2, null);
View view3 = li.inflate(R.layout.pager3, null);
// 添加页面
final ArrayList views = new ArrayList();
views.add(view1);
views.add(view2);
views.add(view3);
// 添加标题
titles = new ArrayList();
titles.add("tab1");
titles.add("tab2");
titles.add("tab3");
picViewPagerAdapter pagerAdapter = new picViewPagerAdapter(views);
viewPager.setAdapter(pagerAdapter);
curIndex = 1;
viewPager.setCurrentItem(curIndex);
img2.setImageResource(R.drawable.page_icon_sel);
viewPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
switch (arg0) {
case 0:
img1.setImageResource(R.drawable.page_icon_sel);
img2.setImageResource(R.drawable.page_icon);
img3.setImageResource(R.drawable.page_icon);
break;
case 1:
img2.setImageResource(R.drawable.page_icon_sel);
img1.setImageResource(R.drawable.page_icon);
img3.setImageResource(R.drawable.page_icon);
break;
case 2:
img3.setImageResource(R.drawable.page_icon_sel);
img2.setImageResource(R.drawable.page_icon);
img1.setImageResource(R.drawable.page_icon);
break;
default:
break;
}
curIndex = arg0;
System.out.println("[MainActivity->]currIndex = " + curIndex);
}
@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 initWidgets() {
viewPager = (ViewPager) findViewById(R.id.viewpager);
img1 = (ImageView) findViewById(R.id.icon_1);
img2 = (ImageView) findViewById(R.id.icon_2);
img3 = (ImageView) findViewById(R.id.icon_3);
}
/**
* 为ViewPager添加适配器
*
* @author Administrator
*
*/
class picViewPagerAdapter extends PagerAdapter {
private List listViews;
public picViewPagerAdapter(List list) {
listViews = list;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return listViews.size();
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0 == arg1;
}
@Override
public void destroyItem(View container, int position, Object object) {
((ViewPager) container).removeView(listViews.get(position));
}
@Override
public CharSequence getPageTitle(int position) {
return titles.get(position);
}
@Override
public Object instantiateItem(View container, int position) {
((ViewPager) container).addView(listViews.get(position));
return listViews.get(position);
}
}
}
每个小圆点的改变是通过viewpager监听器去改变的
viewPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
switch (arg0) {
case 0:
img1.setImageResource(R.drawable.page_icon_sel);
img2.setImageResource(R.drawable.page_icon);
img3.setImageResource(R.drawable.page_icon);
break;
case 1:
img2.setImageResource(R.drawable.page_icon_sel);
img1.setImageResource(R.drawable.page_icon);
img3.setImageResource(R.drawable.page_icon);
break;
case 2:
img3.setImageResource(R.drawable.page_icon_sel);
img2.setImageResource(R.drawable.page_icon);
img1.setImageResource(R.drawable.page_icon);
break;
default:
break;
}
curIndex = arg0;
System.out.println("[MainActivity->]currIndex = " + curIndex);
}
@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
}
});
完整Demo下载：http://download.csdn.net/detail/deng0zhaotai/7272609
