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ViewPager实现引导页

2017/8/22 10:08:49 钻石VIP 程序员俱乐部我要评论(0)

摘要：ViewPager实现引导页废话就不多说了，直接上效果图和代码fry.Activity011packagefry;23importjava.util.ArrayList;4importjava.util.Collection;5importjava.util.Iterator;6importjava.util.List;7importjava.util.ListIterator;89importcom.example.viewPager.R;1011importandroid.app
标签：实现 view

ViewPager实现引导页

废话就不多说了，直接上效果图和代码

fry.Activity01

  1 package fry;
  2 
  3 import java.util.ArrayList;
  4 import java.util.Collection;
  5 import java.util.Iterator;
  6 import java.util.List;
  7 import java.util.ListIterator;
  8 
  9 import com.example.viewPager.R;
 10 
 11 import android.app.Activity;
 12 import android.os.Bundle;
 13 import android.support.v4.view.ViewPager;
 14 import android.support.v4.view.ViewPager.OnPageChangeListener;
 15 import android.view.View;
 16 import android.view.View.OnClickListener;
 17 import android.view.ViewGroup.LayoutParams;
 18 import android.widget.ImageView;
 19 import android.widget.LinearLayout;
 20 
 21 public class Activity01 extends Activity implements OnPageChangeListener,OnClickListener{
 22     private ViewPager viewPager;
 23     private List<View> views;//用来存放放进ViewPager里面的ImageView
 24     private int[] imageID;//
 25     private ImagePagerAdapter adapter;//适配器
 26     private LinearLayout linearLayout;
 27     private int currentPoint;//当前被选中中页面的下标
 28     @Override
 29     protected void onCreate(Bundle savedInstanceState) {
 30         // TODO Auto-generated method stub
 31         super.onCreate(savedInstanceState);
 32         setContentView(R.layout.activity01);
 33         initData();
 34         initView();
 35         
 36     }
 37     //初始化view
 38     void initView(){
 39         adapter=new ImagePagerAdapter(views);
 40         viewPager=(ViewPager) findViewById(R.id.viewPager);
 41         viewPager.setAdapter(adapter);
 42         linearLayout=(LinearLayout) findViewById(R.id.linearLayout);
 43         initPoint();
 44         viewPager.setOnPageChangeListener(this);
 45     }
 46     
 47     //初始化数据
 48     void initData(){
 49         //将图片的id全部放到imageID集合中
 50         imageID=new int[]{R.drawable.guide1,R.drawable.guide2,R.drawable.guide3,R.drawable.guide4};
 51         views=new ArrayList<View>();
 52         //给iamgeView设置LayoutParams参数
 53         LayoutParams layoutParams=new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
 54         for(int i:imageID){
 55             //不确定1
 56             ImageView imageView=new ImageView(this);
 57             imageView.setImageResource(i);
 58             imageView.setLayoutParams(layoutParams);
 59             views.add(imageView);
 60         }
 61         
 62         
 63     }
 64     
 65     /*
 66      * 初始化页面下方的点
 67      */
 68     private void initPoint(){
 69         ImageView[] imageView=new ImageView[imageID.length]; 
 70         for(int i=0;i<linearLayout.getChildCount();i++){
 71             imageView[i]=(ImageView) linearLayout.getChildAt(i);
 72             imageView[i].setImageResource(R.drawable.point_normal);
 73             imageView[i].setOnClickListener(this);
 74             imageView[i].setTag(i);
 75         }
 76         currentPoint=0;
 77         imageView[currentPoint].setImageResource(R.drawable.point_select);
 78     }
 79     /*
 80      * 将页面下方的点全部置为未选中状态
 81      */
 82     private ImageView[] clearPoint(){
 83         ImageView[] imageView=new ImageView[imageID.length]; 
 84         for(int i=0;i<linearLayout.getChildCount();i++){
 85             imageView[i]=(ImageView) linearLayout.getChildAt(i);
 86             imageView[i].setImageResource(R.drawable.point_normal);
 87         }
 88         return imageView;
 89     }
 90 
 91     @Override
 92     public void onPageScrollStateChanged(int arg0) {
 93         // TODO Auto-generated method stub
 94         
 95     }
 96 
 97     @Override
 98     public void onPageScrolled(int arg0, float arg1, int arg2) {
 99         // TODO Auto-generated method stub
100         
101     }
102 
103     /*
104      * 页面被选中时候执行的方法
105      * (non-Javadoc)
106      * @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageSelected(int)
107      */
108     @Override
109     public void onPageSelected(int position) {
110         // TODO Auto-generated method stub
111         ImageView[] imageView= clearPoint();
112         imageView[position].setImageResource(R.drawable.point_select);
113     }
114     
115     //小圆点点击事件
116     @Override
117     public void onClick(View v) {
118         // TODO Auto-generated method stub
119         int i=(Integer) v.getTag();
120         viewPager.setCurrentItem(i);
121     }
122     
123 }

fry.ImagePagerAdapter

 1 package fry;
 2 
 3 import java.util.ArrayList;
 4 import java.util.List;
 5 
 6 import android.support.v4.view.PagerAdapter;
 7 import android.support.v4.view.ViewPager;
 8 import android.view.View;
 9 import android.view.ViewGroup;
10 
11 public class ImagePagerAdapter extends PagerAdapter{
12 
13     private List<View> views;
14     
15     
16     
17     public ImagePagerAdapter(List<View> views) {
18         this.views=views;
19     }
20 
21     @Override
22     public int getCount() {
23         // TODO Auto-generated method stub
24         return this.views.size();
25     }
26     /**
27      * position是在viewPager中显示图片的位置
28      * 我对应的图片放到对应的位置就好了
29      * instantiateItem和destroyItem是对应的
30      * 一个是创建item，一个是销毁item
31      */
32     @Override
33     public Object instantiateItem(ViewGroup container, int position) {
34         ((ViewPager)container).addView(views.get(position));
35         return views.get(position);
36     }
37 
38     @Override
39     public boolean isViewFromObject(View arg0, Object arg1) {
40         // TODO Auto-generated method stub
41         return arg0==arg1;
42     }
43 
44     @Override
45     public void destroyItem(ViewGroup container, int position, Object object) {
46         ((ViewPager)container).removeView(views.get(position));
47     }
48 
49 }

/viewPager/res/layout/activity01.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6 
 7     <android.support.v4.view.ViewPager
 8         android:id="@+id/viewPager"
 9         android:layout_width="match_parent"
10         android:layout_height="match_parent"
11         >
12         
13     </android.support.v4.view.ViewPager>
14     
15     <LinearLayout 
16         android:id="@+id/linearLayout"
17         android:layout_width="wrap_content"
18         android:layout_height="wrap_content"
19         android:orientation="horizontal"
20         android:layout_gravity="bottom|center"
21         >
22         <ImageView 
23             android:id="@+id/point1"
24             android:layout_width="wrap_content"
25             android:layout_height="wrap_content"
26             android:src="@drawable/point_select"
27             android:padding="25dip"
28             />
29         <ImageView 
30             android:id="@+id/point2"
31             android:layout_width="wrap_content"
32             android:layout_height="wrap_content"
33             android:src="@drawable/point_normal"
34             android:padding="25dip"
35             />
36         <ImageView 
37             android:id="@+id/point3"
38             android:layout_width="wrap_content"
39             android:layout_height="wrap_content"
40             android:src="@drawable/point_normal"
41             android:padding="25dip"
42             />
43         <ImageView 
44             android:id="@+id/point4"
45             android:layout_width="wrap_content"
46             android:layout_height="wrap_content"
47             android:src="@drawable/point_normal"
48             android:padding="25dip"
49             />
50         
51     </LinearLayout>
52 
53 </FrameLayout>