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使用ViewPager實(shí)現(xiàn)左右循環(huán)滑動(dòng)及滑動(dòng)跳轉(zhuǎn)

更新時(shí)間：2013年01月02日 17:12:35 作者：

今天實(shí)現(xiàn)了左右滑動(dòng)，至于在最后一頁(yè)滑動(dòng)跳轉(zhuǎn)，這個(gè)也做了但是效果不是太好，也希望有實(shí)現(xiàn)的朋友能夠分享下

前面一篇文章實(shí)現(xiàn)了使用ViewPager實(shí)現(xiàn)高仿launcher拖動(dòng)效果，后來(lái)很多朋友問(wèn)能不能實(shí)現(xiàn)左右循環(huán)滑動(dòng)效果和引導(dǎo)頁(yè)面。今天實(shí)現(xiàn)了左右滑動(dòng)，至于在最后一頁(yè)滑動(dòng)跳轉(zhuǎn)，這個(gè)也做了但是效果不是太好，也希望有實(shí)現(xiàn)的朋友能夠分享下。在最后一頁(yè)添加一張圖片單擊跳轉(zhuǎn)，這個(gè)認(rèn)為很簡(jiǎn)單大家自己添加個(gè)圖片，點(diǎn)擊后跳轉(zhuǎn)就OK。

這篇是在實(shí)現(xiàn)了使用ViewPager實(shí)現(xiàn)高仿launcher拖動(dòng)效果的基礎(chǔ)上做了一些小的修改，可以參照前面的。廢話不多說(shuō)了，直接上代碼吧！

首先看一些layout下的xml

復(fù)制代碼代碼如下:

 
<?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> 

和前面一頁(yè)使用viewpager。使用ViewPager首先需要引入android-support-v4.jar這個(gè)jar包。自己不要忘記加。
下面是核心代碼：

復(fù)制代碼代碼如下:

 
package cn.com.karl.viewpager; 
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.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.ViewGroup.LayoutParams; 
import android.view.Window; 
import android.widget.ImageView; 
public class MainActivity extends Activity { 
ViewPager viewPager; 
ArrayList<View> list; 
ViewGroup main, group; 
ImageView imageView; 
ImageView[] imageViews; 
private static int c_id = 0; 
@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)); 
list.add(inflater.inflate(R.layout.item4, null)); 
list.add(inflater.inflate(R.layout.item5, null)); 
imageViews = new ImageView[list.size()]; 
ViewGroup main = (ViewGroup) inflater.inflate(R.layout.main, null); 

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(MainActivity.this); 
imageView.setLayoutParams(new LayoutParams(12,12)); 
//imageView.setPadding(10, 0, 10, 0); 
imageViews[i] = imageView; 
if (i == 0) { 

imageViews[i].setBackgroundResource(R.drawable.guide_dot_white); 
} else { 
imageViews[i].setBackgroundResource(R.drawable.guide_dot_black); 
} 
group.addView(imageView); 
} 
setContentView(main); 
viewPager.setAdapter(new MyAdapter()); 
viewPager.setOnPageChangeListener(new MyListener()); 
viewPager.setCurrentItem(300); 

} 
class MyAdapter extends PagerAdapter { 
@Override 
public int getCount() { 
return Integer.MAX_VALUE; 
} 
@Override 
public boolean isViewFromObject(View arg0, Object arg1) { 
return arg0 == arg1; 
} 
@Override 
public int getItemPosition(Object object) { 
// TODO Auto-generated method stub 
return super.getItemPosition(object); 
} 
@Override 
public void destroyItem(View arg0, int arg1, Object arg2) { 
// TODO Auto-generated method stub 
//((ViewPager) arg0).removeView(list.get(arg1)); 
} 
@Override 
public Object instantiateItem(View arg0, int arg1) { 
// TODO Auto-generated method stub 
try{ 
((ViewPager) arg0).addView(list.get(arg1%list.size()),0); 
}catch (Exception e) { 
// TODO: handle exception 
} 
return list.get(arg1%list.size()); 
} 
@Override 
public void restoreState(Parcelable arg0, ClassLoader arg1) { 
// TODO Auto-generated method stub 
} 
@Override 
public Parcelable saveState() { 
// TODO Auto-generated method stub 
return null; 
} 
@Override 
public void startUpdate(View arg0) { 
// TODO Auto-generated method stub 
} 
@Override 
public void finishUpdate(View arg0) { 
// TODO Auto-generated method stub 
} 
} 
class MyListener implements OnPageChangeListener { 
//當(dāng)滑動(dòng)狀態(tài)改變時(shí)調(diào)用 
@Override 
public void onPageScrollStateChanged(int arg0) { 
// TODO Auto-generated method stub 
//arg0=arg0%list.size(); 

} 
//當(dāng)當(dāng)前頁(yè)面被滑動(dòng)時(shí)調(diào)用 
@Override 
public void onPageScrolled(int arg0, float arg1, int arg2) { 
// TODO Auto-generated method stub 

} 
//當(dāng)新的頁(yè)面被選中時(shí)調(diào)用 
@Override 
public void onPageSelected(int arg0) { 
if(arg0>2){ 
arg0=arg0%list.size(); 
} 
c_id = arg0; 
for (int i = 0; i < imageViews.length; i++) { 
imageViews[arg0] 
.setBackgroundResource(R.drawable.guide_dot_white); 
if (arg0 != i) { 
imageViews[i] 
.setBackgroundResource(R.drawable.guide_dot_black); 
} 
} 

Log.e("-------------", "當(dāng)前是第"+c_id+"頁(yè)"); 
} 
} 
} 