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ViewPager 滑动页(二)

需求:滑动展示页,能够使用本地数据,及获取服务器数据进行刷新操作,并实现页面自动切换

效果图:

实现分析:

1.目录结构:

代码实现:

1.PosterView.java

package com.jjc.demo;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.os.Handler;import android.os.Looper;import android.os.Message;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.View;import android.widget.FrameLayout;import android.widget.ImageView;import android.widget.LinearLayout;public class PosterView extends FrameLayout{        private Context context;    private ViewPager viewPager;    private LinearLayout container;        private PosterAdapter adapter;        private List<Integer> posterList = new ArrayList<Integer>();            private ImageView imageView;    // 底部小点的图片    private ImageView[] points;    // 记录当前选中位置    private int currentIndex = 0;    private int nextIndex;    private int pageNum = 1;        private Handler handler = new Handler(Looper.getMainLooper()) {        @Override        public void handleMessage(Message msg) {            if (points!= null && points.length >0) {                nextIndex = (currentIndex + 1) % points.length;                // 设置当前页面                setCurDot(nextIndex);                setCurView(nextIndex);                handler.removeMessages(0);                handler.sendEmptyMessageDelayed(0, 5000);            }        }    };        public PosterView(Context context) {        this(context, null);    }        public PosterView(Context context, AttributeSet attrs) {        super(context, attrs);        this.context = context;        LayoutInflater.from(context).inflate(R.layout.view_poster, this, true);        initView();    }        @Override    protected void onDetachedFromWindow(){        handler.removeMessages(0);        super.onDetachedFromWindow();    }    private void initView(){        container = (LinearLayout) findViewById(R.id.container);        viewPager = (ViewPager)findViewById(R.id.viewpager);        viewPager.setOnPageChangeListener(new viewpagerListener());                adapter = new PosterAdapter(context, posterList);        viewPager.setAdapter(adapter);            }        /**     * 刷新海报页数据;     * @param list     */    public void refreshData(List<Integer> list){        if(list == null || list.isEmpty()){            return;        }        initPoint(list.size());                posterList.clear();        posterList.addAll(list);        adapter.notifyDataSetChanged();                handler.removeMessages(0);        handler.sendEmptyMessageDelayed(0, 5000);    }        private void initPoint(int num){        pageNum = num;        container.removeAllViews();                if(num == 0){            return;        }                points = new ImageView[num];        for (int i = 0; i < num; i++) {            imageView = new ImageView(context);            imageView.setBackgroundResource(R.drawable.poster_point_selector);                        LinearLayout.LayoutParams mLayoutParams = new LinearLayout.LayoutParams(12, 12);            mLayoutParams.rightMargin = 8;            mLayoutParams.leftMargin = 8;            mLayoutParams.topMargin = 24;            mLayoutParams.bottomMargin = 28;                        points[i] = imageView;            // 设置位置tag,方便取出与当前位置对应            points[i].setTag(i);            // 默认都设为灰色            points[i].setEnabled(false);            // 给每个小点设置监听            points[i].setOnClickListener(new pointListener());            container.addView(points[i], mLayoutParams);        }        // 设置为白色,即选中状态        points[currentIndex].setEnabled(true);    }        private class viewpagerListener implements OnPageChangeListener {        @Override        public void onPageScrollStateChanged(int arg0) {        }        @Override        public void onPageScrolled(int arg0, float arg1, int arg2) {        }        @Override        public void onPageSelected(int position) {            // 设置底部小点选中状态            setCurDot(position);        }    }        private class pointListener implements OnClickListener {        @Override        public void onClick(View v) {            int position = (Integer) v.getTag();            setCurView(position);            setCurDot(position);        }    }        /**     * 设置当前页面的位置     */    private void setCurView(int position) {        if (position < 0 || position >= pageNum) {            return;        }        viewPager.setCurrentItem(position);    }        /**     * 设置当前的小点的位置     */    private void setCurDot(int positon) {        if (positon < 0 || positon > pageNum - 1 || currentIndex == positon) {            return;        }        points[positon].setEnabled(true);        points[currentIndex].setEnabled(false);        currentIndex = positon;    }    }

 

项目总结:

  对于页面动态切换,采用handle进行切换;

 

代码:http://pan.baidu.com/s/1jJH1O

 

ViewPager 滑动页(二)