Day-23页面视图控件

ViewPager实现页面滑动效果

.java代码：

package com.example.day9;import java.util.ArrayList;import java.util.List;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.LayoutParams;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.support.v4.view.ViewPager.PageTransformer;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.ImageView;import android.widget.LinearLayout;public class MainActivity extends ActionBarActivity implements OnPageChangeListener,OnClickListener{private ViewPager viewpager; //页面视图private List<View> views;  //视图列表容器private int[] Images={R.drawable.av_adblock_count_orange_1,R.drawable.av_adblock_count_orange_2,R.drawable.av_adblock_count_orange_3,R.drawable.av_adblock_count_orange_4};    private viewpager_adapter adapt;  // 适配器    private ImageView[] points;      private LinearLayout ll;    private int currentpoint; // 当前页下标@Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                // 实例化        ll=(LinearLayout) findViewById(R.id.ll);        viewpager=(ViewPager) findViewById(R.id.viewpager);        views=new ArrayList<View>();        adapt =new viewpager_adapter(views);                //初始化        initData();        initPoint();        viewpager.setAdapter(adapt); // 设置适配器viewpager.setOnPageChangeListener(this); //设置页面转换事件监听器    }//初始化数据private void initData(){android.view.ViewGroup.LayoutParams layout=new android.view.ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);for(int i:Images){ImageView image=new ImageView(this);image.setImageResource(i);image.setLayoutParams(layout);views.add(image);}}//初始化圆点private void initPoint(){points=new ImageView[Images.length];//全部圆点为未选中状态（绿色）for(int i=0;i<ll.getChildCount();i++){points[i]=(ImageView) ll.getChildAt(i);points[i].setImageResource(R.drawable.av_adblock_kuan_blue);    points[i].setOnClickListener(this); //每个点设置单击事件监听器    points[i].setTag(i);}currentpoint=0;points[currentpoint].setImageResource(R.drawable.av_adblock_kuan_orange);}/** * OnPageChangeListener事件的方法 */@Overridepublic void onPageScrollStateChanged(int arg0) {}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {}//当新的界面被选中时 调用@Overridepublic void onPageSelected(int position) {for(int i=0;i<ll.getChildCount();i++){points[i]=(ImageView) ll.getChildAt(i);points[i].setImageResource(R.drawable.av_adblock_kuan_blue);}points[position].setImageResource(R.drawable.av_adblock_kuan_orange);}/** * OnClickListener事件的方法 */@Overridepublic void onClick(View v) {viewpager.setCurrentItem((Integer) v.getTag());}}

.自定义适配器

package com.example.day9;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 viewpager_adapter extends PagerAdapter {    private List<View> view;public viewpager_adapter(List<View> views){    this.view=views;    }// 获得当前界面数@Overridepublic int getCount() {return view.size();}    //初始化position位置的界面@Overridepublic Object instantiateItem(ViewGroup container, int position) {((ViewPager)container).addView(view.get(position));return view.get(position);}//判断是否由对象生成界面@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {return arg0==arg1;}//销毁position位置的界面@Overridepublic void destroyItem(ViewGroup container, int position, Object object) {((ViewPager)container).removeView(view.get(position));}}

.xml代码：

<FrameLayout 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:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.day9.MainActivity" >    <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/ll"         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal"        android:layout_gravity="bottom|center_horizontal"        >                <ImageView        android:id="@+id/imageView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/av_adblock_kuan_orange"        android:padding="15dip"/>               <ImageView        android:id="@+id/imageView2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/av_adblock_kuan_blue"        android:padding="15dip"/>                <ImageView        android:id="@+id/imageView3"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/av_adblock_kuan_blue"        android:padding="15dip"/>                <ImageView        android:id="@+id/imageView4"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/av_adblock_kuan_blue"        android:padding="15dip"/>            </LinearLayout>    </FrameLayout>