设置ImageView的android系统系统、ImageView、android

由网友(唯独月色依旧╮)分享简介：我有一个JSON网址:: http://54.218.73.244:7006/DescriptionSortedRating/ I have a JSON URL :: http://54.218.73.244:7006/DescriptionSortedRating/JSON STRUCT :: "rest...

我有一个JSON网址:: http://54.218.73.244:7006/DescriptionSortedRating/

I have a JSON URL :: http://54.218.73.244:7006/DescriptionSortedRating/

JSON STRUCT ::

"restaurants": [
    {
      "restaurantID": 4,
      "restaurantNAME": "CopperChimney1",
      "restaurantIMAGE": "MarkBoulevard1.jpg",
      "restaurantDISTANCE": 15,
      "restaurantTYPE": "Indian",
      "restaurantRATING": 1,
      "restaurantPrice": 11,
      "restaurantTime": "9am t0 8pm"
    },

RestaurantDescPhotos.java

public class RestaurantDescPhotos extends Activity {
    // url to make request

    private static String url = "http://54.218.73.244:7006/DescriptionSortedRating/";

    String restaurant_name, cc_res;
    ProgressDialog progressDialog;
    JSONObject jsonObject;
    JSONArray first_array;
    TextView textView;
    TextView text;

    private SparseArray<String> imagesMap = new SparseArray<String>();

    ArrayList<HashMap<String, String>> list_of_images = new ArrayList<HashMap<String, String>>();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.restaurant_desc_photos);

        progressDialog = new ProgressDialog(RestaurantDescPhotos.this);
        new ParsingAsync().execute();
    }

    private class ParsingAsync extends AsyncTask<Void, Void, Void> {
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            progressDialog = ProgressDialog.show(RestaurantDescPhotos.this, "",
                    "Please Wait", true, false);

        }

        @Override
        protected Void doInBackground(Void... params) {
            // TODO Auto-generated method stub
            String _response = null;
            try {
                HttpClient httpclient = new DefaultHttpClient();
                httpclient.getParams().setParameter(
                        CoreProtocolPNames.PROTOCOL_VERSION,
                        HttpVersion.HTTP_1_1);



                HttpGet request = new HttpGet(url);
                HttpResponse response = httpclient.execute(request);
                HttpEntity resEntity = response.getEntity();
                _response = EntityUtils.toString(resEntity);

                jsonObject = new JSONObject(_response);
                first_array = jsonObject.getJSONArray("restaurants");

            } catch (JSONException e) {
                e.printStackTrace();
            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

            return null;

        }

        @Override
        protected void onPostExecute(Void result) {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
            progressDialog.dismiss();

            // TextView timedisplay=(TextView)
            // findViewById(R.id.RestaurantTimeID);

            for (int i = 0; i < first_array.length(); i++) {
                try {
                    JSONObject detail_obj = first_array.getJSONObject(i);

                    HashMap<String, String> map_for_images = new HashMap<String, String>();

                    int id = detail_obj.getInt("_id");
                    String IMAGES = detail_obj.getString("restaurantIMAGE");

                    map_for_images.put("Starters", IMAGES);

                    list_of_images.add(map_for_images);


                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }


            ImageView imageView = (ImageView) findViewById(R.id.DISP_IMG);


        }
    }
}

RestaurantDescPhotos.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TableRow
        android:id="@+id/tableRow6"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="2sp" >
    </TableRow>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="40dp" >
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="60dp" >
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <TableRow
            android:id="@+id/DescriptionTitleRow"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="2sp" >

            <HorizontalScrollView
                android:id="@+id/horizontalScrollView1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" >

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="vertical" >

                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:orientation="horizontal" >

                        <ImageView
                            android:id="@+id/DISP_IMG"
                            android:layout_width="167dp"
                            android:layout_height="167dp"
                            android:src="@drawable/ic_launcher" />
                    </LinearLayout>
                </LinearLayout>
            </HorizontalScrollView>
        </TableRow>
    </LinearLayout>

</LinearLayout>

ImageLoader.java

public class ImageLoader {

    MemoryCache memoryCache = new MemoryCache();
    FileCache fileCache;
    private Map<ImageView, String> imageViews = Collections
            .synchronizedMap(new WeakHashMap<ImageView, String>());
    ExecutorService executorService;
    // Handler to display images in UI thread
    Handler handler = new Handler();

    public ImageLoader(Context context) {
        fileCache = new FileCache(context);
        executorService = Executors.newFixedThreadPool(5);
    }

    final int stub_id = R.drawable.temp_img;

    public void DisplayImage(String url, ImageView imageView) {
        imageViews.put(imageView, url);
        Bitmap bitmap = memoryCache.get(url);
        if (bitmap != null)
            imageView.setImageBitmap(bitmap);
        else {
            queuePhoto(url, imageView);
            imageView.setImageResource(stub_id);
        }
    }

    private void queuePhoto(String url, ImageView imageView) {
        PhotoToLoad p = new PhotoToLoad(url, imageView);
        executorService.submit(new PhotosLoader(p));
    }

    private Bitmap getBitmap(String url) {
        File f = fileCache.getFile(url);

        Bitmap b = decodeFile(f);
        if (b != null)
            return b;

        // Download Images from the Internet
        try {
            Bitmap bitmap = null;
            URL imageUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) imageUrl
                    .openConnection();
            conn.setConnectTimeout(30000);
            conn.setReadTimeout(30000);
            conn.setInstanceFollowRedirects(true);
            InputStream is = conn.getInputStream();
            OutputStream os = new FileOutputStream(f);
            Utils.CopyStream(is, os);
            os.close();
            conn.disconnect();
            bitmap = decodeFile(f);
            return bitmap;
        } catch (Throwable ex) {
            ex.printStackTrace();
            if (ex instanceof OutOfMemoryError)
                memoryCache.clear();
            return null;
        }
    }

    // Decodes image and scales it to reduce memory consumption
    private Bitmap decodeFile(File f) {
        try {
            // Decode image size
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;
            FileInputStream stream1 = new FileInputStream(f);
            BitmapFactory.decodeStream(stream1, null, o);
            stream1.close();

            // Find the correct scale value. It should be the power of 2.
            // Recommended Size 512
            final int REQUIRED_SIZE = 70;
            int width_tmp = o.outWidth, height_tmp = o.outHeight;
            int scale = 1;
            while (true) {
                if (width_tmp / 2 < REQUIRED_SIZE
                        || height_tmp / 2 < REQUIRED_SIZE)
                    break;
                width_tmp /= 2;
                height_tmp /= 2;
                scale *= 2;
            }

            // Decode with inSampleSize
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize = scale;
            FileInputStream stream2 = new FileInputStream(f);
            Bitmap bitmap = BitmapFactory.decodeStream(stream2, null, o2);
            stream2.close();
            return bitmap;
        } catch (FileNotFoundException e) {
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    // Task for the queue
    private class PhotoToLoad {
        public String url;
        public ImageView imageView;

        public PhotoToLoad(String u, ImageView i) {
            url = u;
            imageView = i;
        }
    }

    class PhotosLoader implements Runnable {
        PhotoToLoad photoToLoad;

        PhotosLoader(PhotoToLoad photoToLoad) {
            this.photoToLoad = photoToLoad;
        }

        @Override
        public void run() {
            try {
                if (imageViewReused(photoToLoad))
                    return;
                Bitmap bmp = getBitmap(photoToLoad.url);
                memoryCache.put(photoToLoad.url, bmp);
                if (imageViewReused(photoToLoad))
                    return;
                BitmapDisplayer bd = new BitmapDisplayer(bmp, photoToLoad);
                handler.post(bd);
            } catch (Throwable th) {
                th.printStackTrace();
            }
        }
    }

    boolean imageViewReused(PhotoToLoad photoToLoad) {
        String tag = imageViews.get(photoToLoad.imageView);
        if (tag == null || !tag.equals(photoToLoad.url))
            return true;
        return false;
    }

    // Used to display bitmap in the UI thread
    class BitmapDisplayer implements Runnable {
        Bitmap bitmap;
        PhotoToLoad photoToLoad;

        public BitmapDisplayer(Bitmap b, PhotoToLoad p) {
            bitmap = b;
            photoToLoad = p;
        }

        public void run() {
            if (imageViewReused(photoToLoad))
                return;
            if (bitmap != null)
                photoToLoad.imageView.setImageBitmap(bitmap);
            else
                photoToLoad.imageView.setImageResource(stub_id);
        }
    }

    public void clearCache() {
        memoryCache.clear();
        fileCache.clear();
    }

}

我有一个XML格式的ImageView的如何设置图像视图的JSONURL 在我有codeD之类的某些部分，但想知道如何设置 ImageView的

I have a imageview in XML How to set the image view for the JSONURL I have coded some part of the class but trying to know how to set the imageview

任何想法

推荐答案

您可以通过设置您的图片ImageLoader的......

You can set your Image using ImageLoader...

创建ImageLoader的实例在全球如..

Create instance of ImageLoader globally like..

  ImageLoader imageLoader;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
           ......
           imageLoader=new  ImageLoader(ClassName.this);


            ImageView imageView = (ImageView) findViewById(R.id.DISP_IMG);
           ......
            imageLoader.DisplayImage(YourImageURLHere,imageView);

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相关专题：系统；Imageview ；Android ；发布时间：2023-09-05 04:57:31