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  • 仿优酷Android客户端图片左右滑动(自动滑动)

    最终效果:

    页面布局main.xml:

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="#FFFFFF"
        android:orientation="vertical" >
    
        <RelativeLayout
            android:layout_width="fill_parent"
            android:layout_height="40dip"
            android:background="@drawable/title_bk" >
    
            <ImageButton
                android:id="@+id/btn_back"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/btn_back_selector"
                android:src="@drawable/btn_back" />
    
            <View
                android:id="@+id/line0"
                android:layout_width="1px"
                android:layout_height="fill_parent"
                android:layout_toRightOf="@id/btn_back"
                android:background="#aa11264f" />
    
            <View
                android:layout_width="1px"
                android:layout_height="fill_parent"
                android:layout_toRightOf="@id/line0"
                android:background="#009ad6" />
    
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:text="优酷客户端"
                android:textColor="#FFFFFF"
                android:textSize="20sp" />
        </RelativeLayout>
    
        <FrameLayout
            android:layout_width="fill_parent"
            android:layout_height="140dip" >
    
            <android.support.v4.view.ViewPager
                android:id="@+id/vp"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent" />
    
            <LinearLayout
                android:layout_width="fill_parent"
                android:layout_height="35dip"
                android:layout_gravity="bottom"
                android:background="#33000000"
                android:gravity="center"
                android:orientation="vertical" >
    
                <TextView
                    android:id="@+id/tv_title"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="中国家庭院校园区域名字体现"
                    android:textColor="#ffffff" />
    
                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="3dip"
                    android:gravity="center" >
    
                    <View
                        android:id="@+id/v_dot0"
                        style="@style/dot_style"
                        android:background="@drawable/dot_focused" />
    
                    <View
                        android:id="@+id/v_dot1"
                        style="@style/dot_style" />
    
                    <View
                        android:id="@+id/v_dot2"
                        style="@style/dot_style" />
    
                    <View
                        android:id="@+id/v_dot3"
                        style="@style/dot_style" />
    
                    <View
                        android:id="@+id/v_dot4"
                        style="@style/dot_style" />
                </LinearLayout>
            </LinearLayout>
        </FrameLayout>
    
    </LinearLayout>

    后台控制:

    package fengyan.viewpager;
    
    import java.util.ArrayList;
    import java.util.List;
    import java.util.concurrent.Executors;
    import java.util.concurrent.ScheduledExecutorService;
    import java.util.concurrent.TimeUnit;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.os.Handler;
    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.view.View;
    import android.widget.ImageView;
    import android.widget.ImageView.ScaleType;
    import android.widget.TextView;
    
    /**
     * 仿优酷Android客户端图片左右滑动
     * 
     * @author SinaWeiBo:f309587969@126.com
     * @author TencentWeiBo:fengyanjava
     * 
     */
    public class MyViewPagerActivity extends Activity {
        private ViewPager viewPager; // android-support-v4中的滑动组件
        private List<ImageView> imageViews; // 滑动的图片集合
    
        private String[] titles; // 图片标题
        private int[] imageResId; // 图片ID
        private List<View> dots; // 图片标题正文的那些点
    
        private TextView tv_title;
        private int currentItem = 0; // 当前图片的索引号
    
        // An ExecutorService that can schedule commands to run after a given delay,
        // or to execute periodically.
        private ScheduledExecutorService scheduledExecutorService;
    
        // 切换当前显示的图片
        private Handler handler = new Handler() {
            public void handleMessage(android.os.Message msg) {
                viewPager.setCurrentItem(currentItem);// 切换当前显示的图片
            };
        };
    
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
    
            imageResId = new int[] { R.drawable.a, R.drawable.b, R.drawable.c, R.drawable.d, R.drawable.e };
            titles = new String[imageResId.length];
            titles[0] = "巩俐不低俗,我就不能低俗";
            titles[1] = "扑树又回来啦!再唱经典老歌引万人大合唱";
            titles[2] = "揭秘北京电影如何升级";
            titles[3] = "乐视网TV版大派送";
            titles[4] = "热血屌丝的反杀";
    
            imageViews = new ArrayList<ImageView>();
    
            // 初始化图片资源
            for (int i = 0; i < imageResId.length; i++) {
                ImageView imageView = new ImageView(this);
                imageView.setImageResource(imageResId[i]);
                imageView.setScaleType(ScaleType.CENTER_CROP);
                imageViews.add(imageView);
            }
    
            dots = new ArrayList<View>();
            dots.add(findViewById(R.id.v_dot0));
            dots.add(findViewById(R.id.v_dot1));
            dots.add(findViewById(R.id.v_dot2));
            dots.add(findViewById(R.id.v_dot3));
            dots.add(findViewById(R.id.v_dot4));
    
            tv_title = (TextView) findViewById(R.id.tv_title);
            tv_title.setText(titles[0]);//
    
            viewPager = (ViewPager) findViewById(R.id.vp);
            viewPager.setAdapter(new MyAdapter());// 设置填充ViewPager页面的适配器
            // 设置一个监听器,当ViewPager中的页面改变时调用
            viewPager.setOnPageChangeListener(new MyPageChangeListener());
    
        }
    
        @Override
        protected void onStart() {
            scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
            // 当Activity显示出来后,每两秒钟切换一次图片显示
            scheduledExecutorService.scheduleAtFixedRate(new ScrollTask(), 1, 2, TimeUnit.SECONDS);
            super.onStart();
        }
    
        @Override
        protected void onStop() {
            // 当Activity不可见的时候停止切换
            scheduledExecutorService.shutdown();
            super.onStop();
        }
    
        /**
         * 换行切换任务
         * 
         * @author Administrator
         * 
         */
        private class ScrollTask implements Runnable {
    
            public void run() {
                synchronized (viewPager) {
                    System.out.println("currentItem: " + currentItem);
                    currentItem = (currentItem + 1) % imageViews.size();
                    handler.obtainMessage().sendToTarget(); // 通过Handler切换图片
                }
            }
    
        }
    
        /**
         * 当ViewPager中页面的状态发生改变时调用
         * 
         * @author Administrator
         * 
         */
        private class MyPageChangeListener implements OnPageChangeListener {
            private int oldPosition = 0;
    
            /**
             * This method will be invoked when a new page becomes selected.
             * position: Position index of the new selected page.
             */
            public void onPageSelected(int position) {
                currentItem = position;
                tv_title.setText(titles[position]);
                dots.get(oldPosition).setBackgroundResource(R.drawable.dot_normal);
                dots.get(position).setBackgroundResource(R.drawable.dot_focused);
                oldPosition = position;
            }
    
            public void onPageScrollStateChanged(int arg0) {
    
            }
    
            public void onPageScrolled(int arg0, float arg1, int arg2) {
    
            }
        }
    
        /**
         * 填充ViewPager页面的适配器
         * 
         * @author Administrator
         * 
         */
        private class MyAdapter extends PagerAdapter {
    
            @Override
            public int getCount() {
                return imageResId.length;
            }
    
            @Override
            public Object instantiateItem(View arg0, int arg1) {
                ((ViewPager) arg0).addView(imageViews.get(arg1));
                return imageViews.get(arg1);
            }
    
            @Override
            public void destroyItem(View arg0, int arg1, Object arg2) {
                ((ViewPager) arg0).removeView((View) arg2);
            }
    
            @Override
            public boolean isViewFromObject(View arg0, Object arg1) {
                return arg0 == arg1;
            }
    
            @Override
            public void restoreState(Parcelable arg0, ClassLoader arg1) {
    
            }
    
            @Override
            public Parcelable saveState() {
                return null;
            }
    
            @Override
            public void startUpdate(View arg0) {
    
            }
    
            @Override
            public void finishUpdate(View arg0) {
    
            }
        }
    }
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  • 原文地址:https://www.cnblogs.com/zhangs1986/p/3695356.html
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