Question

我在ListView Item中有一个ViewPager。在ListView滚动中，我想获得我在ViewPager中选择的上一页。

我试图将位置设置为

vPager.setTag(position)

但没有找到检索我的上一页的方法

这是我的ListView的getView（）

public View getView(int position, View view, ViewGroup vGroup) {
    inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    vRow=view;
    final ContentHolder holder;
    if(view==null){

        holder=new ContentHolder();

        vRow=inflater.inflate(R.layout.activity_swipe_view_pager, null);
        holder.vPager=(ViewPager) vRow.findViewById(R.id.ui_pager);
        holder.radiogrp=(RadioGroup) vRow.findViewById(R.id.ui_radiogroup);
        int pageCount=integer.length;
        addRadio=new AddRadioViewSwipe(context, pageCount);
        addRadio.addRadio(holder.radiogrp);
        try{
            holder.radiogrp.getChildAt(0).setAlpha(1.0f);

        }
        catch(Exception e){
            Log.d("loop", "error"+e);
        }
        vRow.setTag(holder);

    }
    else{

        holder=(ContentHolder) vRow.getTag();

    }
    ViewPagerAdapter pagerAdpt=new ViewPagerAdapter(context, integer,R.layout.activity_viewpager_model);
    holder.vPager.setAdapter(pagerAdpt);
    holder.vPager.setOffscreenPageLimit(3);
    holder.vPager.setTag(position);
    holder.vPager.setPageMargin(-150);
    holder.vPager.setOnPageChangeListener(new OnPageChangeListener() {
        @Override
        public void onPageSelected(int position) {
            Log.d("pos", ""+position);
            if(holder.vPager.isShown()){

            }
            for(int i=0;i<integer.length;i++){
                holder.radiogrp.getChildAt(integer.length-(i+1)).setAlpha(0.5f);

            }                   
            holder.radiogrp.getChildAt(position).setAlpha(1.0f);
            Log.d("pos", ""+position+"");   
        }
        @Override
        public void onPageScrolled(int position, float arg1, int arg2) {
            Log.d("t1", ""+position);

        }
        @Override
        public void onPageScrollStateChanged(int arg0) {
            Log.d("t1...", ""+arg0);
        }
    });
    return vRow;
}

Answer 1

这对我有用：

Parcelable state=holder.vPager.onSaveInstanceState();

holder.vPager.setAdapter(pagerAdpt);

holder.vPager.onRestoreInstanceState(state);

在ListView Scroll上获取ViewPager的上一页

1 个答案: