从片段中的响应获取后寻呼适配器不显示图像

问题描述

我从响应中得到三张图像，我存储在 arraylist 中，然后我尝试在 PagerAdapter 中设置，但在我的视图寻呼机中没有显示任何内容，以下是我的 pageradapter 类，谁能告诉我犯了什么错误?

I am getting three images from response,and i am storing in arraylist,then i try to set in PagerAdapter,but nothing display in my view pager,following is my pageradapter class,can any one tell that what is mistake i made?

我正在使用片段

在我的 Postexecute 中，我正在像这样在视图寻呼机中设置它

In my Postexecute i am setting it in view pager like this

adapter = new ImageAdapter(All_Product_Details.this.getActivity());
            viewPager.setAdapter(adapter);
}

下面是我在异步任务之后设置的适配器

below is my adapter which i set after asynctask

      public class ImageAdapter extends FragmentPagerAdapter {
    Context context;
    ImageAdapter(Context context)
    {
        this.context=context;
    }
    @Override
    public int getCount() {
        return multimglist.size();
    }

    @Override
    public Fragment getItem(int i) {
        return null;
    }

    @Override
    public void destroyItem(View container, int position, Object object) {
        ((ViewPager) container).removeView((View) object);
    }
    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == ((ImageView) object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        ImageView imageView = new ImageView(context);
        int padding = context.getResources().getDimensionPixelSize(
                R.dimen.activity_horizontal_margin);
        imageView.setPadding(padding, padding, padding, padding);
        //imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
        Picasso.with(context).load(multimglist.get(position)).into(imageView);


        // imageView.setImageURI(Uri.parse(imgStr[position]));
        ((ViewPager) container).addView(imageView, 0);
        return imageView;
    }
}

推荐答案

this is my pager adapter change according that
public class LoginViewPagerCA extends PagerAdapter {
    SparseArray<View> views = new SparseArray<>();
    List<Viewpager_POJO> listofPersons;
    LayoutInflater inflater;
    Context context;

    private int count = 4;
    public LoginViewPagerCA(Context context, List<Viewpager_POJO> listofPersons) {
        this.context = context;
        this.listofPersons = listofPersons;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return listofPersons.size();
    }
    public void setCount(int count) {
        this.count = count;
    }

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

    }
    public void setData(ArrayList<Viewpager_POJO> data) {
        listofPersons = data;
    }

    public Object instantiateItem(ViewGroup container, final int position)

    {

        final TextView txtFstName, txtLstName, txtRollno, txtArrTime, txtTimeLeft;
        ImageView imgView;

        final Viewpager_POJO rowperson = listofPersons.get(position);

        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        final View itemView = inflater.inflate(R.layout.landing_pager_item, container, false);
        txtFstName = (TextView) itemView.findViewById(R.id.pager_big_tv);
        txtLstName = (TextView) itemView.findViewById(R.id.pager_small_tv);
        imgView = (ImageView) itemView.findViewById(R.id.pager_image);


        try {
            // txtCompn.setText((position + 1) + "/" + StuFirstNM.length);
            txtFstName.setText(rowperson.getDesc());
            txtLstName.setText(rowperson.getRating());

            //new LoadImage(imgView).execute(rowperson.getUrls());
            if (!TextUtils.isEmpty(rowperson.getUrls())) {
             //   PicassoTrustAll.getInstance(context).load(rowperson.getUrls()).placeholder(context.getResources().getDr`enter code here`awable(R.drawable.ic_launcher)).error(context.getResources().getDrawable(R.drawable.ic_launcher)).into(imgView);
//
                byte[] imgbytes = Base64.decode(rowperson.getStrImm(), Base64.DEFAULT);
                Bitmap bitmap = BitmapFactory.decodeByteArray(imgbytes, 0, imgbytes.length);
                imgView.setImageBitmap(bitmap);
//                PicassoTrustAll.getInstance(context)
//                        .load(rowperson.getUrls())
//                        .error(R.mipmap.landinglogo)
//                        .into(imgView);
                Log.w("Testing", "Image Download URL=" + rowperson.getUrls());
            } else {
                imgView.setBackgroundResource(R.mipmap.landinglogo);
            }


            ((ViewPager) container).addView(itemView);
            views.put(position, itemView);

        } catch (Exception e)

        {
            e.printStackTrace();
        }

        return itemView;
    }


    public void destroyItem(ViewGroup container, int position, Object object) {
        View view = (View) object;

        ((ViewPager) container).removeView(view);
        views.remove(position);
        view = null;
    }

这篇关于从片段中的响应获取后寻呼适配器不显示图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！