在View Pager中传递Json图像

我试图传递查看传呼机中的Json数据，它没有显示任何错误。但它也不会在视图寻呼机显示图像时，我无法理解我的错误在View Pager中传递Json图像

JSON：http://www.souqalkhaleejia.com/webapis/banners.php

Banner.java

public class Banner extends Fragment { 
    ViewPager bannerpager; 
    ArrayList<Data> bannerdta = new ArrayList<Data>(); 
    BannerAdapter bannerAdapter; 

    @Nullable 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     View bannerp = inflater.inflate(R.layout.banner, container, false); 
     bannerpager = (ViewPager) bannerp.findViewById(R.id.bannerpager); 
     bannerpager.setAdapter(bannerAdapter); 
     bannerAdapter = new BannerAdapter(bannerdta, getActivity()); 
     loadbanner(); 
     return bannerp; 
    } 

    private void loadbanner() { 
     String bannerurl = "http://www.souqalkhaleejia.com/webapis/banners.php"; 
     JsonObjectRequest bannerreq = new JsonObjectRequest(Request.Method.GET, bannerurl, new Response.Listener<JSONObject>() { 
      @Override 
      public void onResponse(JSONObject response) { 
       try { 
        JSONArray banners = response.getJSONArray("banners"); 
        for (int i = 0; i < banners.length(); i++) { 
         JSONObject banner1 = banners.getJSONObject(i); 
         Data banndata = new Data(); 
         banndata.setBannerimages(banner1.getString("image")); 
         bannerdta.add(banndata); 
        } 

       } catch (JSONException e) { 
        e.printStackTrace(); 
       } 
       bannerAdapter.notifyDataSetChanged(); 
      } 
     }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       Toast.makeText(getActivity(), "" + error, Toast.LENGTH_SHORT).show(); 
      } 
     }); 
     AppController.getInstance().addToRequestQueue(bannerreq); 
    } 
}

Adapter.java

public class BannerAdapter extends PagerAdapter { 
    Context cntx; 
    private ArrayList<Data> blist; 
    private LayoutInflater binflater; 

    public BannerAdapter(ArrayList<Data> blist, Context cntx) { 
     this.blist = blist; 
     this.cntx = cntx; 
     binflater= (LayoutInflater) cntx.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    @Override 

    public int getCount() { 
     return blist.size(); 
    } 

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

    @Override 
    public Object instantiateItem(ViewGroup container, int position) { 
     View view=binflater.inflate(R.layout.banner_layout,container,false); 
     NetworkImageView bannerimage= (NetworkImageView) view.findViewById(R.id.bannerimage); 
     Data bannerdata=blist.get(position); 
     ImageLoader imageLoader=AppController.getInstance().getImageLoader(); 
     bannerimage.setImageUrl(bannerdata.getBannerimages(),imageLoader); 
     view.setTag(bannerdata); 
     container.addView(view); 
     Log.i("Banner", "instantiateItem() [position: " + position + "]" + " childCount:" + container.getChildCount()); 
     return view; 
    } 

    @Override 
    public void destroyItem(ViewGroup container, int position, Object object) { 
     container.removeView((View) object); 
     Log.i("Banner", "destroyItem() [position: " + position + "]" + " childCount:" + container.getChildCount()); 
    } 

    @Override 
    public int getItemPosition(Object object) { 
     Data data= (Data) ((View) object).getTag(); 
     int position=blist.indexOf(data); 
     if(position>=0){ 
      return position; 
     }else { 
      return POSITION_NONE; 
     } 
    } 
}

我包括从另一个类到主页的viewpager Home.xml

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/drawer_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:orientation="vertical"> 
     <include 
      android:id="@+id/hmebar" 
      layout="@layout/toolbar" /> 
     <FrameLayout 
      android:layout_width="match_parent" 
      android:layout_height="200dp" 
      > 
      <include layout="@layout/banner"/> 
     </FrameLayout> 

    </LinearLayout> 

    <ListView 
     android:id="@+id/nav_drawer" 
     android:layout_width="240dp" 
     android:layout_height="match_parent" 
     android:layout_gravity="start" 
     android:background="@drawable/hover" 
     android:choiceMode="singleChoice" 
     android:divider="@android:color/transparent" 
     android:dividerHeight="0dp" /> 
</android.support.v4.widget.DrawerLayout>

banner.xml（我曾在这里写下viewpager xml和包含在主页布局）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical"> 
    <android.support.v4.view.ViewPager 
     android:id="@+id/bannerpager" 
     android:layout_width="match_parent" 
     android:layout_height="200dp"/> 

</LinearLayout>

banner_layout.xml（单viewpager是图像）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical"> 
<com.android.volley.toolbox.NetworkImageView 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/bannerimage"/> 
</LinearLayout>

来源

2015-11-15 Ayub Baba

？ –

我正在使用排球库 –

您可以在这里发布NetworkImageView的代码吗？ –

你不将bannerdta更新为bannerAdapter，因此bannerAdapter.notifyDataSetChanged()将不起作用。
您可以在BannerAdapter.class
pubilc void updateData(Data banndata) { blist.add(banndata); notifyDataSetChanged(); }
和呼叫网络请求后，全成add方法updateData(Data banndata)，其中ImageLoader的库您使用的使用bannerAdapter.updateData(banndata)

来源

2015-11-15 07:38:59

我认为网址没有打到网络 –

横幅类是一个片段它没有击中网络 –

在View Pager中传递Json图像

回答

相关问题