Android ViewPager刪除當前頁面並移至下一個

Question

在ViewPager中，當用戶單擊刪除按鈕時，我試圖刪除當前頁面並移至下一頁。 當我嘗試下面的代碼時，它將移至下一頁，但會刪除最后一頁。 請幫助我。

@Override
public Object instantiateItem(ViewGroup container, final int IdxVal)
{
    LinearLayout linearLayout = new LinearLayout(context);
    linearLayout.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));

    ImageView imageView = new ImageView(context);
    imageView.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));

    Glide.with(context)
            .load(imageListAryVar.get(IdxVal))
            .fitCenter()
            .into(imageView);

    linearLayout.addView(imageView);
    container.addView(linearLayout);

    return linearLayout;
}

@Override
public void destroyItem(ViewGroup container, int position, Object object)
{
    container.removeView((LinearLayout) object);
}

void delCurrentPageFnc()
{
    int delIdxVar = viewPager.getCurrentItem();

    if(imageListAryVar.size() > 1)
    {
        if (delIdxVar == imageListAryVar.size() - 1)
            viewPager.setCurrentItem(delIdxVar - 1);
        else
            viewPager.setCurrentItem(delIdxVar + 1);

        imageListAryVar.remove(delIdxVar);
        notifyDataSetChanged();
    }
    else finish();
}

Answer 1

經過幾次嘗試，我通過添加getItemPosition並設置return POSITION_NONE來解決此問題；
如果您不添加此notifyDataSetChanged（）; 方法行不通。

@Override
public int getItemPosition(Object object)
{
    return POSITION_NONE;
}

void delCurrentPageFnc()
{
    int delIdxVar = viewPager.getCurrentItem();

    if(imageListAryVar.size() > 1)
    {
        imageListAryVar.remove(delIdxVar);
        notifyDataSetChanged();
    }
    else finish();
}

設置getItemPosition之后，這是不必要的，因此已刪除

if (delIdxVar == imageListAryVar.size() - 1) 
    viewPager.setCurrentItem(delIdxVar - 1);
else 
   viewPager.setCurrentItem(delIdxVar + 1);