viewPager+Handler+Timer简略实现广告轮播效果

  1 package com.example.administrator.imageviewlunbodemo;  2   3 import android.app.Activity;  4 import android.os.Bundle;  5 import android.os.Handler;  6 import android.os.Message;  7 import android.support.v4.view.PagerAdapter;  8 import android.support.v4.view.ViewPager;  9 import android.view.LayoutInflater; 10 import android.view.View; 11 import android.view.ViewGroup; 12 import android.widget.ImageView; 13  14 import java.util.ArrayList; 15 import java.util.List; 16 import java.util.Timer; 17 import java.util.TimerTask; 18  19  20 public class MainActivity extends Activity { 21  22     private ViewPager myViewPager; 23     private List<View> myContiontar = new ArrayList<>();   //viewPager的数据源 24     private PagerAdapter myPagerAdapter;   //有了数据源，必然要有适配器 25  26     private ImageView imageView1; 27     private ImageView imageView2; 28     private ImageView imageView3; 29     private ImageView imageView4; 30     private ImageView imageView5; 31  32     private Timer mTimer; 33     private Timertask mTimertask; 34  35     @Override 36     protected void onCreate(Bundle savedInstanceState) { 37         super.onCreate(savedInstanceState); 38         setContentView(R.layout.activity_main); 39  40         initViews();  //初始化各种View 41  42         myViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() { 43             @Override 44             public void onPageScrolled(int i, float v, int i2) { 45  46             } 47  48             @Override 49             public void onPageSelected(int i) { 50                 selectImageId(i); 51             } 52  53             @Override 54             public void onPageScrollStateChanged(int i) { 55  56             } 57         }); 58  59         mTimertask = new Timertask(); 60         mTimer = new Timer(); 61         mTimer.schedule(mTimertask,0,2000); 62 //        //启动时选择第一张图片 63 //        imageView1.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_select); 64  65  66     } 67  68     //初始化各种View 69     private void initViews(){ 70         // 先将xml文件 换成 view 71         myViewPager = (ViewPager) findViewById(R.id.viewpager); 72  73         imageView1 = (ImageView) findViewById(R.id.first_fragment_down_image1); 74         imageView2 = (ImageView) findViewById(R.id.first_fragment_down_image2); 75         imageView3 = (ImageView) findViewById(R.id.first_fragment_down_image3); 76         imageView4 = (ImageView) findViewById(R.id.first_fragment_down_image4); 77         imageView5 = (ImageView) findViewById(R.id.first_fragment_down_image5); 78  79         //建立五个view 去获得四个ImageView 80         View view1 = LayoutInflater.from(getApplicationContext()).inflate(R.layout.lunbo_image1, null); 81         View view2 = LayoutInflater.from(getApplicationContext()).inflate(R.layout.lunbo_image2,null); 82         View view3 = LayoutInflater.from(getApplicationContext()).inflate(R.layout.lunbo_image3, null); 83         View view4 = LayoutInflater.from(getApplicationContext()).inflate(R.layout.lunbo_image4, null); 84         View view5 = LayoutInflater.from(getApplicationContext()).inflate(R.layout.lunbo_image5,null); 85         //加入到容器里面 86         myContiontar.add(view1); 87         myContiontar.add(view2); 88         myContiontar.add(view3); 89         myContiontar.add(view4); 90         myContiontar.add(view5); 91         //初始化 适配器 92         myPagerAdapter = new PagerAdapter() { 93             //返回显示多少项 94             @Override 95             public int getCount() { 96                 return myContiontar.size(); 97             } 98  99             @Override100             public boolean isViewFromObject(View view, Object o) {101                 return view == o;102             }103             //滑动切换时，移除当前组件104             @Override105             public void destroyItem(ViewGroup container, int position, Object object) {106                 container.removeView(myContiontar.get(position));107             }108             //没次滑动时生成的组件109             @Override110             public Object instantiateItem(ViewGroup container, int position) {111                 container.addView(myContiontar.get(position));112                 return myContiontar.get(position);113             }114         };115         //设置适配器116         myViewPager.setAdapter(myPagerAdapter);117     }118 119     //选择那个图片120     private void selectImageId(int i){121         initImageBackGround();122         switch (i){123             case 0:124                 imageView1.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_select);125                 break;126             case 1:127                 imageView2.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_select);128                 break;129             case 2:130                 imageView3.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_select);131                 break;132             case 3:133                 imageView4.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_select);134                 break;135             case 4:136                 imageView5.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_select);137                 break;138         }139     }140     //初始化 所有Image的背景141     private void initImageBackGround(){142         imageView1.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_normal);143         imageView2.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_normal);144         imageView3.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_normal);145         imageView4.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_normal);146         imageView5.setBackgroundResource(R.drawable.wallet_coin_purse_guide_purse_dot_normal);147     }148 149     int count = 0;150     private Handler mhandler = new Handler(){151 152         @Override153         public void handleMessage(Message msg) {154             super.handleMessage(msg);155             if (msg.what == 0x111){156                 //操作157                 count++;158                 myViewPager.setCurrentItem(count % 5);159             }160         }161     };162 163     //建立一个Timertask164     class Timertask extends TimerTask{165 166         @Override167         public void run() {168             mhandler.sendEmptyMessage(0x111);  //发送空消息169         }170     }171 }

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity">    <FrameLayout        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"        android:orientation="vertical"        android:gravity="center|bottom">        <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:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginBottom="5dp"            android:orientation="horizontal"            android:layout_gravity="center|bottom">            <ImageView                android:id="@+id/first_fragment_down_image1"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginLeft="2dp"                android:layout_marginRight="2dp"                android:background="@drawable/wallet_coin_purse_guide_purse_dot_normal"/>            <ImageView                android:id="@+id/first_fragment_down_image2"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginLeft="2dp"                android:layout_marginRight="2dp"                android:background="@drawable/wallet_coin_purse_guide_purse_dot_normal"/>            <ImageView                android:id="@+id/first_fragment_down_image3"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginLeft="2dp"                android:layout_marginRight="2dp"                android:background="@drawable/wallet_coin_purse_guide_purse_dot_normal"/>            <ImageView                android:id="@+id/first_fragment_down_image4"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginLeft="2dp"                android:layout_marginRight="2dp"                android:background="@drawable/wallet_coin_purse_guide_purse_dot_normal"/>            <ImageView                android:id="@+id/first_fragment_down_image5"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginLeft="2dp"                android:layout_marginRight="2dp"                android:background="@drawable/wallet_coin_purse_guide_purse_dot_normal"/>        </LinearLayout>    </FrameLayout>    <ImageView        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="2.5"        android:background="@color/fitst_fragment_image_color"/></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="match_parent">    <ImageView        android:id="@+id/first_fragment_lunbo_image1"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="@drawable/image1"        /></LinearLayout>