ViewPager实现首次进入软件时左右滑屏的软件展示效果

效果如图：







图片资源不再提供，大家可以自己下载，能实现效果即可，看代码：

首先是展示界面的layout：

view.xml

注意，采用的是帧布局，页面切换时的小圆点是在各张图片之上的

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

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

<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

<LinearLayout
android:id="@+id/viewGroup"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="30dp"
android:gravity="center_horizontal"
android:orientation="horizontal" >
</LinearLayout>
</RelativeLayout>

</FrameLayout>

然后是viewPaper中所包含的各个item，这些是在代码中动态添加，每个item中都包含一张图片，在这里我用了4张图片

item1.xml

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

<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/show1" >
</ImageView>

</LinearLayout>

item2.xml和item3.xml与1相同，换张图片即可

最后是item4.xml，这个与前三个稍显不同，大家都知道，在最后一张图片展示完后，会出现一个"开始体验",“立即进入”等等的控件，点击之后就进入主界面了，这个我们同样需采用帧布局

<?xml version="1.0" encoding="UTF-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/show4" >
</ImageView>

<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ImageView
android:id="@+id/go"
android:layout_alignParentBottom="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginBottom="60dp"
android:src="@drawable/go" />
</RelativeLayout>
</FrameLayout>

接着就是java代码了

ViewActivity.java

package com.example.viewpaper;

import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;

public class ViewActivity extends Activity {
ViewPager viewPager;
ArrayList<View> list;
ViewGroup main, group;
ImageView imageView;
ImageView[] imageViews;
LinearLayout go;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
LayoutInflater inflater = getLayoutInflater();
list = new ArrayList<View>();
list.add(inflater.inflate(R.layout.item1, null));
list.add(inflater.inflate(R.layout.item2, null));
list.add(inflater.inflate(R.layout.item3, null));
//为item4中的控件添加监听
View v = (View)inflater.inflate(R.layout.item4, null);
ImageView go=(ImageView)v.findViewById(R.id.go);
go.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent =new Intent();
intent.setClass(ViewActivity.this, MainActivity.class);
startActivity(intent);
finish();
}
});
list.add(v);
imageViews = new ImageView[list.size()];
ViewGroup main = (ViewGroup) inflater.inflate(R.layout.view, null);
// group是R.layou.main中的负责包裹小圆点的LinearLayout.
ViewGroup group = (ViewGroup) main.findViewById(R.id.viewGroup);

viewPager = (ViewPager) main.findViewById(R.id.viewPager);

for (int i = 0; i < list.size(); i++) {
imageView = new ImageView(ViewActivity.this);
imageView.setLayoutParams(new LayoutParams(10,10));
imageView.setPadding(10, 0, 10, 0);
imageViews[i] = imageView;
if (i == 0) {
// 默认进入程序后第一张图片被选中;
imageViews[i].setBackgroundResource(R.drawable.dot_white);
} else {
imageViews[i].setBackgroundResource(R.drawable.dot_black);
}
group.addView(imageView);
}
setContentView(main);
viewPager.setAdapter(new MyAdapter());
viewPager.setOnPageChangeListener(new MyListener());
}
class MyAdapter extends PagerAdapter {
@Override
public int getCount() {
return list.size();
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public int getItemPosition(Object object) {
return super.getItemPosition(object);
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView(list.get(arg1));
}
@Override
public Object instantiateItem(View arg0, int arg1) {
((ViewPager) arg0).addView(list.get(arg1));
return list.get(arg1);
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {

}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View arg0) {
}
@Override
public void finishUpdate(View arg0) {
}
}
class MyListener implements OnPageChangeListener {
@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageSelected(int arg0) {
for (int i = 0; i < imageViews.length; i++) {
imageViews[arg0]
.setBackgroundResource(R.drawable.dot_white);
if (arg0 != i) {
imageViews[i]
.setBackgroundResource(R.drawable.dot_black);
}
}
}
}
//按下返回键则跳过软件展示页面直接进入主界面
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
Intent intent =new Intent();
intent.setClass(ViewActivity.this, MainActivity.class);
startActivity(intent);
finish();
}
return false;
}
}

在最后一个界面点击小飞机，即进入主界面，主界面MainActivity及layout不再贴代码了，大家可以自由写了。。。