Android 使用寻呼机适配器保存和恢复视图寻呼机的状态

我正在使用带有寻呼机适配器的视图寻呼机。问题是我不能使用片段。因此，所有操作都是使用视图完成的。下面是代码

private class MyPagerAdapter extends PagerAdapter {
    private View temp;
    public MyPagerAdapter() {
    }

    @Override
    public int getCount() {
        return 3;

    }
    public void get(ViewParent viewParent){
        temp=(View) viewParent;
    }
    @Override
    public int getItemPosition(Object object) {
        if(object.equals(temp)){
            Log.d("Serve","The gridview is about to be removed");
            return POSITION_NONE;

        }
        else {
            Log.d("Serve","The gridview is not to be removed");
            return POSITION_UNCHANGED;
        }
    }

    public Object instantiateItem(View collection, int position) {
        LayoutInflater inflater = (LayoutInflater) collection.getContext()
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        Log.d("SERVE","3");
       View view=null;

        switch (position) {
        case 0:
            if(albums==-1){
                view = inflater.inflate(R.layout.grid, null);
                gv=(GridView)view.findViewById(R.id.grid_view);
                gridAdapter=new GridAdapter(Serve.this,Artists.songList,0);     
                gv.setAdapter(gridAdapter);
                gv.setOnItemClickListener(new OnItemClickListener(){

                    @Override
                    public void onItemClick(AdapterView<?> v, View arg1,
                            int pos, long arg3) {
                        get(v.getParent());
                        setAlbum(pos);
                        notifyDataSetChanged();

                    }
                });
            }
            else {
                view = inflater.inflate(R.layout.activity_title, null);
                lv=(ListView)view.findViewById(R.id.music_list);
                //lv.setFadingEdgeLength(0);
                songAdapter=new SongAdapter(Serve.this,Artists.songList,0,albums);
                /*SwingRightInAnimationAdapter swingRightInAnimationAdapter = new SwingRightInAnimationAdapter(songAdapter);

                // Assign the ListView to the AnimationAdapter and vice versa
                swingRightInAnimationAdapter.setAbsListView(lv);
                lv.setAdapter(swingRightInAnimationAdapter);*/
                lv.setAdapter(songAdapter);
                lv.setOnItemClickListener(new OnItemClickListener(){
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view,
                            int position, long id) {
                        for(int i=0;i<Artists.songList.size();i++){
                            if(Artists.songList.get(i).getTitle().equals
                                    (((SongAdapter.getAlbumSongs().get(position))))){
                                songPicked(i);
                                break;
                            }
                        }
                        ChatHeadService.updateHead();
                    }
                });
            }
            break;

        //Removed case 1 and case 2 because they are similar to case 0.

        Log.d("SERVE","The view is about to be initialised");
        /*View view = inflater.inflate(resId, null);
        final ArrayList<String> list = new ArrayList<String>();
        for (int i = 0; i < names.length; ++i) {
          list.add(names[i]+i+1);
        }*/
        //lv.setAdapter(songAdapter);
        ((ViewPager) collection).addView(view, 0);
        return view;
    }
    @Override
    public CharSequence getPageTitle(int pos) {
        if(pos==0) return "Albums";
        else if(pos==1) return "Artists";
        else if(pos==2) return "Songs";
        else return "Genre";
    }

    @Override
    public void destroyItem(View collection, int position, Object view) {
         ((ViewPager) collection).removeView((View) view);
    }


    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }

    @Override
    public Parcelable saveState() {
        return null;
    }

    @Override
    public void restoreState(Parcelable arg0, ClassLoader arg1) {
    }

私有类MyPagerAdapter扩展了PagerAdapter{
私用视图；
公共MyPagerAdapter（）{
}
@凌驾
public int getCount（）{
返回3；
}
public void get（ViewParent ViewParent）{
temp=（视图）viewParent；
}
@凌驾
public int getItemPosition（对象）{
if（对象等于（临时））{
Log.d（“服务”，“网格视图即将被删除”）；
返回位置\无；
}
否则{
Log.d（“服务”，“不删除gridview”）；
返回位置_不变；
}
}
公共对象实例化项（视图集合，int位置）{
LayoutInflater充气器=（LayoutInflater）集合。getContext（）
.getSystemService（上下文布局\充气机\服务）；
日志d（“送达”、“3”）；
视图=空；
开关（位置）{
案例0：
如果（相册==-1）{
视图=充气机。充气（R.layout.grid，空）；
gv=（GridView）view.findviewbyd（R.id.grid\u视图）；
gridAdapter=新的gridAdapter（service.this，Artists.songList，0）；
gv.设置适配器（网格适配器）；
gv.setOnItemClickListener（新的OnItemClickListener（）{
@凌驾
公共链接（AdapterView v，视图arg1，
内部位置，长arg3）{
get（v.getParent（））；
设置相册（pos）；
notifyDataSetChanged（）；
}
});
}
否则{
视图=充气机。充气（R.layout.activity\u title，空）；
lv=（ListView）view.findViewById（R.id.music\u list）；
//低压设置衰减边缘长度（0）；
songAdapter=新的songAdapter（Serve.this，Artists.songList，0，albums）；
/*SwingRightInAnimationAdapter SwingRightInAnimationAdapter=新的SwingRightInAnimationAdapter（songAdapter）；
//将ListView指定给AnimationAdapter，反之亦然
swingRightInAnimationAdapter.setAblistView（lv）；
低压设置适配器（swingRightInAnimationAdapter）*/
低压设置适配器（songAdapter）；
lv.setOnItemClickListener（新的OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父级、视图、，
内部位置，长id）{
对于（int i=0；i