ViewPager实现漂亮的引导页

Halona ·

更新时间:2024-09-20

· 846 次阅读

废话就不多说了，直接上效果图和代码

fry.Activity01


package fry;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import com.example.viewPager.R;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class Activity01 extends Activity implements OnPageChangeListener,OnClickListener{
 private ViewPager viewPager;
 private List<View> views;//用来存放放进ViewPager里面的ImageView
 private int[] imageID;//
 private ImagePagerAdapter adapter;//适配器
 private LinearLayout linearLayout;
 private int currentPoint;//当前被选中中页面的下标
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity01);
  initData();
  initView();
 }
 //初始化view
 void initView(){
  adapter=new ImagePagerAdapter(views);
  viewPager=(ViewPager) findViewById(R.id.viewPager);
  viewPager.setAdapter(adapter);
  linearLayout=(LinearLayout) findViewById(R.id.linearLayout);
  initPoint();
  viewPager.setOnPageChangeListener(this);
 }
 //初始化数据
 void initData(){
  //将图片的id全部放到imageID集合中
  imageID=new int[]{R.drawable.guide1,R.drawable.guide2,R.drawable.guide3,R.drawable.guide4};
  views=new ArrayList<View>();
  //给iamgeView设置LayoutParams参数
  LayoutParams layoutParams=new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
  for(int i:imageID){
   //不确定1
   ImageView imageView=new ImageView(this);
   imageView.setImageResource(i);
   imageView.setLayoutParams(layoutParams);
   views.add(imageView);
  }
 }
 /*
  * 初始化页面下方的点
  */
 private void initPoint(){
  ImageView[] imageView=new ImageView[imageID.length]; 
  for(int i=0;i<linearLayout.getChildCount();i++){
   imageView[i]=(ImageView) linearLayout.getChildAt(i);
   imageView[i].setImageResource(R.drawable.point_normal);
   imageView[i].setOnClickListener(this);
   imageView[i].setTag(i);
  }
  currentPoint=0;
  imageView[currentPoint].setImageResource(R.drawable.point_select);
 }
 /*
  * 将页面下方的点全部置为未选中状态
  */
 private ImageView[] clearPoint(){
  ImageView[] imageView=new ImageView[imageID.length]; 
  for(int i=0;i<linearLayout.getChildCount();i++){
   imageView[i]=(ImageView) linearLayout.getChildAt(i);
   imageView[i].setImageResource(R.drawable.point_normal);
  }
  return imageView;
 }
 @Override
 public void onPageScrollStateChanged(int arg0) {
  // TODO Auto-generated method stub
 }
 @Override
 public void onPageScrolled(int arg0, float arg1, int arg2) {
  // TODO Auto-generated method stub
 }
 /*
  * 页面被选中时候执行的方法
  * (non-Javadoc)
  * @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageSelected(int)
  */
 @Override
 public void onPageSelected(int position) {
  // TODO Auto-generated method stub
  ImageView[] imageView= clearPoint();
  imageView[position].setImageResource(R.drawable.point_select);
 }
 //小圆点点击事件
 @Override
 public void onClick(View v) {
  // TODO Auto-generated method stub
  int i=(Integer) v.getTag();
  viewPager.setCurrentItem(i);
 }
}

fry.ImagePagerAdapter


package fry;
import java.util.ArrayList;
import java.util.List;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
public class ImagePagerAdapter extends PagerAdapter{
 private List<View> views;
 public ImagePagerAdapter(List<View> views) {
  this.views=views;
 }
 @Override
 public int getCount() {
  // TODO Auto-generated method stub
  return this.views.size();
 }
 /**
  * position是在viewPager中显示图片的位置
  * 我对应的图片放到对应的位置就好了
  * instantiateItem和destroyItem是对应的
  * 一个是创建item，一个是销毁item
  */
 @Override
 public Object instantiateItem(ViewGroup container, int position) {
  ((ViewPager)container).addView(views.get(position));
  return views.get(position);
 }
 @Override
 public boolean isViewFromObject(View arg0, Object arg1) {
  // TODO Auto-generated method stub
  return arg0==arg1;
 }
 @Override
 public void destroyItem(ViewGroup container, int position, Object object) {
  ((ViewPager)container).removeView(views.get(position));
 }
}

/viewPager/res/layout/activity01.xml


<?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" >
 <android.support.v4.view.ViewPager
  android:id="@+id/viewPager"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  >
 </android.support.v4.view.ViewPager>
 <LinearLayout 
  android:id="@+id/linearLayout"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation="horizontal"
  android:layout_gravity="bottom|center"
  >
  <ImageView 
   android:id="@+id/point1"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:src="@drawable/point_select"
   android:padding="25dip"
   />
  <ImageView 
   android:id="@+id/point2"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:src="@drawable/point_normal"
   android:padding="25dip"
   />
  <ImageView 
   android:id="@+id/point3"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:src="@drawable/point_normal"
   android:padding="25dip"
   />
  <ImageView 
   android:id="@+id/point4"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:src="@drawable/point_normal"
   android:padding="25dip"
   />
 </LinearLayout>
</FrameLayout>

1、多个控件（这里指小圆点）可以用List来一起访问

2、可用动态的控件设置tag来区分控件

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