android-如何在arraylist中添加排球图像请求？

概述我在代码2下面有东西,Volley请求设置图像,数组列表适配器显示静态图像.我需要帮助将排球请求添加到数组列表中,我希望排球图像显示在arraylist中请问该怎么办？(请注意,我已经有一个phpscript,可以在json中向我发送图像的路径URL)代码：main_activityprotectedvoidonCreate(Bu

我在代码2下面有东西,Volley请求设置图像,数组列表适配器显示静态图像.

我需要帮助将排球请求添加到数组列表中,我希望排球图像显示在arrayList中

请问该怎么办？

(请注意,我已经有一个PHPscript,可以在Json中向我发送图像的路径URL)

代码：main_activity

 protected voID onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentVIEw(R.layout.activity_main);  RequestQueue mRequestQueue;  final String IMAGE_URL =            "http://developer.androID.com/images/training/system-ui.png";  mNetworkImageVIEw = (NetworkImageVIEw) findVIEwByID(R.ID.networkImageVIEw);//Instantiate the cacheCache cache = new diskBasedCache(getCacheDir(), 1024 * 1024); // 1MB cap//Set up the network to use httpURLConnection as the http clIEnt.Network network = new BasicNetwork(new HurlStack());//Instantiate the RequestQueue with the cache and network.mRequestQueue = new RequestQueue(cache, network);//Start the queuemRequestQueue.start();ImageLoader mImageLoader = new ImageLoader(mRequestQueue, new LruBitmapCache(            LruBitmapCache.getCacheSize(mContext)));mNetworkImageVIEw.setimageUrl(IMAGE_URL, mImageLoader);Customlistadapter adapter=new Customlistadapter(this, itemname, imgID);List=(ListVIEw)findVIEwByID(R.ID.List);List.setAdapter(adapter);List.setonItemClickListener(new OnItemClickListener() {    @OverrIDe    public voID onItemClick(AdapterVIEw<?> parent, VIEw vIEw,            int position, long ID) {        // Todo auto-generated method stub        String Slecteditem= itemname[+position];        Toast.makeText(getApplicationContext(), Slecteditem, Toast.LENGTH_SHORT).show();    }});}

arraylistadapter

包com.example.p;

import androID.app.Activity;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.Widget.ArrayAdapter;import androID.Widget.ImageVIEw;import androID.Widget.TextVIEw;public class Customlistadapter extends ArrayAdapter<String> {    private final Activity context;    private final String[] itemname;    private final Integer[] imgID;    public Customlistadapter(Activity context, String[] itemname, Integer[] imgID) {        super(context, R.layout.myList, itemname);        // Todo auto-generated constructor stub        this.context=context;        this.itemname=itemname;        this.imgID=imgID;    }    public VIEw getVIEw(int position,VIEw vIEw,VIEwGroup parent) {        LayoutInflater inflater=context.getLayoutInflater();        VIEw rowVIEw=inflater.inflate(R.layout.myList, null,true);        TextVIEw txtTitle = (TextVIEw) rowVIEw.findVIEwByID(R.ID.item);        ImageVIEw imageVIEw = (ImageVIEw) rowVIEw.findVIEwByID(R.ID.icon);        TextVIEw extratxt = (TextVIEw) rowVIEw.findVIEwByID(R.ID.textVIEw1);        txtTitle.setText(itemname[position]);        imageVIEw.setimageResource(imgID[position]);        extratxt.setText("Description "+itemname[position]);        return rowVIEw;    };}

和Lrubitmapcache

package com.example.p;import androID.content.Context;import androID.graphics.Bitmap;import androID.support.v4.util.LruCache;import androID.util.displayMetrics;import com.androID.volley.toolBox.ImageLoader.ImageCache;public class LruBitmapCache extends LruCache<String, Bitmap>        implements ImageCache {    public LruBitmapCache(int maxSize) {        super(maxSize);    }    public LruBitmapCache(Context ctx) {        this(getCacheSize(ctx));    }    @OverrIDe    protected int sizeOf(String key, Bitmap value) {        return value.getRowBytes() * value.getHeight();    }    @OverrIDe    public Bitmap getBitmap(String url) {        return get(url);    }    @OverrIDe    public voID putBitmap(String url, Bitmap bitmap) {        put(url, bitmap);    }    // Returns a cache size equal to approximately three screens worth of images.    public static int getCacheSize(Context ctx) {        final displayMetrics displayMetrics = ctx.getResources().                getdisplayMetrics();        final int screenWIDth = displayMetrics.wIDthPixels;        final int screenHeight = displayMetrics.heightPixels;        // 4 bytes per pixel        final int screenBytes = screenWIDth * screenHeight * 4;        return screenBytes * 3;    }}

解决方法:

在其他帖子中,您需要我的帮助.
我的图像来自作为Json字符串Base64编码的其余服务器.然后我做下一个：

  public VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) {        final ObjectLogados o = items.get(position);        final VIEwHolder holder;        VIEw vi = convertVIEw;        if (vi == null){            LayoutInflater inflater = context.getLayoutInflater();            vi = inflater.inflate(R.layout.singlerowlog, null);// e' preciso fazer o inflate pois a vIEw nao ainda nao esta em activity alguma            holder = new VIEwHolder();            holder.ivimgMedLog= (ImageVIEw) vi.findVIEwByID(R.ID.ivp_imagemedlog) ;            holder.tv_usuario = (TextVIEw) vi.findVIEwByID(R.ID.tv_hnomemedlogado);            vi.setTag(holder);        }        else {            holder = (VIEwHolder) convertVIEw.getTag();        }        holder.tv_usuario.setText(o.getUsuario());        String imageKey="MED"+String.valueOf(o.getNr_usuario());        final Bitmap bitmap = Common.getInstance().getBitmapFromMemCache(imageKey);        if (bitmap != null) {            holder.ivimgMedLog.setimageBitmap(bitmap);        }else {            holder.ivimgMedLog.setimageDrawable(context.getResources()                    .getDrawable(R.drawable.empty));            downloadimage(holder.ivimgMedLog,o.getNr_usuario());        }        return vi;    }    static class VIEwHolder {        TextVIEw tv_usuario;        ImageVIEw ivimgMedLog;    }    private voID downloadimage(final ImageVIEw imageVIEw,final int nr){        //final ImageVIEw imageVIEw=imV;        String url=Common.getServerURL() + "\"RetrIEveImageStaff\"";        JsONArray ja = new JsONArray();        ja.put(nr);        JsONObject JsonBody = new JsONObject();        try {            JsonBody.put("_parameters", ja);        } catch (JsONException e) {            e.printstacktrace();        }        JsonObjectRequest jr = new JsonObjectRequest(Request.Method.POST, url,                JsonBody, new Response.Listener<JsONObject>() {            @OverrIDe            public voID onResponse(JsONObject response) {                JsONObject anEntry = null, entrIEs = null;                String ims = "";                try {   // Todo auto-generated method stub                    JsONArray LResult = response.getJsONArray("result");                    String s = LResult.get(0).toString();                    anEntry = new JsONObject(s);                    ims = anEntry.getString("imagem");                } catch (JsONException e) {                    // Todo auto-generated catch block                    e.printstacktrace();                }                Bitmap decodedByte = null;                try {                    if (!TextUtils.isEmpty(ims)) {                        byte[] decodedString = Base64.decode(ims, Base64.DEFAulT);                        decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);                        if (imageVIEw != null) {                            if (decodedByte != null) {                                imageVIEw.setimageBitmap(decodedByte);                                Common.getInstance().addBitmapToMemoryCache("MED"+String.valueOf(nr), decodedByte);                            } else {                                imageVIEw.setimageDrawable(imageVIEw.getContext().getResources()                                        .getDrawable(R.drawable.empty));                            }                        }                    } else {                        imageVIEw.setimageDrawable(imageVIEw.getContext().getResources()                                .getDrawable(R.drawable.empty));                    }                }catch (Exception e){                    e.printstacktrace();                }            }        }, new Response.ErrorListener() {            @OverrIDe            public voID one rrorResponse(VolleyError error) {                // Todo auto-generated method stub                //Log.v(TAG, error.getMessage());                Toast.makeText(context, "Erro adquirindo imagem...." + error.getMessage(), Toast.LENGTH_SHORT).show();                error.printstacktrace();            }        });        jr.setRetryPolicy(new DefaultRetryPolicy(Common.DEFAulT_TIMEOUT_MS,                Common.DEFAulT_MAX_RETRIES,                DefaultRetryPolicy.DEFAulT_BACKOFF_MulT));        Common.getInstance().addToReqQueue(jr, "jreq"); //reqQueue.add(jr);    }

您可以更改使用排球的请求并获取图像.因此,您可以将https://developer.android.com/training/volley/request.html#request-image中描述的代码更改为类似于以下内容的代码：

ImageVIEw mImageVIEw;String url = "http://i.imgur.com/7spzG.png";mImageVIEw = (ImageVIEw) findVIEwByID(R.ID.myImage);...// RetrIEves an image specifIEd by the URL, displays it in the UI.ImageRequest request = new ImageRequest(url,    new Response.Listener<Bitmap>() {        @OverrIDe        public voID onResponse(Bitmap bitmap) {            mImageVIEw.setimageBitmap(bitmap);        }    }, 0, 0, null,    new Response.ErrorListener() {        public voID one rrorResponse(VolleyError error) {            mImageVIEw.setimageResource(R.drawable.image_load_error);        }    });// Access the RequestQueue through your singleton class.MySingleton.getInstance(this).addToRequestQueue(request);

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