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ViewPager 滑动页(三)

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,当滑动到最后一页时,结束当前activity,进入下一个activity;

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.app.Activity;import android.content.Context;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;import android.widget.Toast;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;        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(){        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();    }        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 {        int pageState = 100;        @Override        public void onPageScrollStateChanged(int arg0) {            /**             * arg0:什么都没做             * arg1:正在滑动             * arg2:滑动完毕             */            pageState = arg0;        }        @Override        public void onPageScrolled(int arg0, float arg1, int arg2) {                        if(!posterList.isEmpty() && arg0 == (posterList.size()-1)  && pageState == 1){                Toast.makeText(context, "最后一页", Toast.LENGTH_SHORT).show();                ((Activity)context).finish();            }        }        @Override        public void onPageSelected(int state) {            setCurDot(state);        }    }        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:

  ViewPager的onPageChangeListener监听获取,当前的滑动状态;

  http://www.cnblogs.com/sishuiliuyun/p/3962347.html

 

代码:http://pan.baidu.com/s/1gdBZTGv

 

ViewPager 滑动页(三)