Question

使用ViewPager逐个显示大量图片。自定义ViewPager使用 PagerContainer by refer this example。在ViewPager中默认有两个图像视图，两个图像视图都可见。但是我想在ViewPager中选择隐藏的一个图像视图。例如，视图分页器当前位置在2中意味着第二个位置的模糊图像将变为不可见。在所有其他位置，模糊图像是可见的。我不知道如何任何人都知道帮助我解决这个问题。

查看寻呼机声明

ema = new Executive_member_adapter(getActivity());

executive_cont = (PagerContainer)findViewById(R.id.executive_memeber_container);
executive_members = executive_cont.getViewPager();

executive_members.setAdapter(ema);
executive_members.setOffscreenPageLimit(ema.getCount());

executive_members.setPageMargin(15);
executive_members.setClipChildren(false);
executive_members.setOnPageChangeListener(ema);

PagerAdapter

public class Executive_member_adapter  extends PagerAdapter implements OnPageChangeListener{

LayoutInflater inflater;
Activity activity;

ImageView members_img,blur_img;

int photos[] = {R.drawable.pic1,R.drawable.pic2,R.drawable.pic3,R.drawable.pic4,R.drawable.pic5,R.drawable.pick6};

public Executive_member_adapter(Activity activity) {
    // TODO Auto-generated constructor stub

    this.inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    return photos.length;
}

@Override
public boolean isViewFromObject(View view, Object object) {
    // TODO Auto-generated method stub
    return view == ((RelativeLayout) object);
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {

   ((ViewPager) container).removeView((View)object);
}

@Override
public Object instantiateItem(final ViewGroup container, final int position) {

    View itemView;
    itemView = inflater.inflate(R.layout.executive_members_pic, container, false);

    members_img = (ImageView)itemView.findViewById(R.id.memebers_image);
    members_img.setBackgroundResource(photos[position]);

   blur_img = (ImageView)itemView.findViewById(R.id.blur_image);

    ((ViewPager) container).addView(itemView);

    return itemView;
}

@Override
public void onPageScrollStateChanged(int position) {
    // TODO Auto-generated method stub

}

@Override
public void onPageScrolled(int position, float arg1, int arg2) {
    // TODO Auto-generated method stub

}

@Override
public void onPageSelected(int position) {
    // TODO Auto-generated method stub

}
}

Answer 1

您要显示图像的数组，您可以动态添加/删除要隐藏或显示的图像。

Answer 2

你是说这个意思吗？在所选页面上，ImageView变得不可见。在这种情况下，ViewPager有4页。

@Override
    public void onPageSelected(int position) {
        switch (position) {
        case 0:
            blur_img.setVisibility(ImageView.VISIBLE);
            break;
        case 1:
            blur_img.setVisibility(ImageView.GONE);
            break;
        case 2:
            blur_img.setVisibility(ImageView.VISIBLE);
            break;
        case 3:
            blur_img.setVisibility(ImageView.VISIBLE);
            break;

    }

如何在ViewPager中隐藏和显示视图

2 个答案: