我有一个从web服务器读取一些项目的android活动，除了图像外，一切都很好 我只用了一个项目做了同样的工作，但是无论如何我都无法想到阅读很多项目并将它们的值设置为imageView。
是否有允许我在使用hashmap结束后将图像值设置为listAdapter？
非常感谢任何帮助！
class LoadAllProducts extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(GetAllRecipesActivity.this);
pDialog.setMessage("Loading products. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("category", R_category));
Log.d("R_category: ", R_category);
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Products: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
products = json.getJSONArray(TAG_table);
// looping through All Products
for (int i = 0; i < products.length(); i++) {
JSONObject c = products.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_SCB_ID);
String title = c.getString(TAG_TITLE);
String name = c.getString(TAG_NAME);
name= name.substring(1, name.length());
name="http://studentcookbook.comoj.com/android_connect"+name;
Log.d("NAME OF THE URL!",name);
// here i'm starting to set the image value it's all good here
downloadBitma =downloadBitmap(name);
// creating new HashMap
HashMap<String, Object> map=new HashMap<String, Object>();
// adding each child node to HashMap key => value
map.put(TAG_SCB_ID, id);
map.put(TAG_TITLE, title);
map.put(TAG_NAME, downloadBitma);
// adding HashList to ArrayList
productsList.add(map);
}
} else {
// Launch Add New product Activity
Intent i = new Intent(getApplicationContext(),AddRecipeActivity.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
Log.e("Buffer Error", "Error converting result " + e.toString());
} catch (IOException e) {
e.printStackTrace();
Log.e("Buffer Error", " Image is not passing to hashmap");
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
// here i'm trying to set the image to imageView but it didn't work
// final ImageView imageView = (ImageView) findViewById(R.id.GetAllmg);
// runOnUiThread(new Runnable() {
// @Override
// public void run() {
// imageView.setImageBitmap(downloadBitma); }
// });
ListAdapter adapter = new SimpleAdapter(GetAllRecipesActivity.this, productsList,
R.layout.list_recipe, new String[] { TAG_SCB_ID,TAG_TITLE},
new int[] { R.id.GetAllscbid, R.id.GetAllTitle });
// updating listview
Toast.makeText(GetAllRecipesActivity.this, "onPostExecute", Toast.LENGTH_SHORT).show();
setListAdapter(adapter);
}
});
}
// method for downloading images
private Bitmap downloadBitmap(String url) throws IOException {
HttpUriRequest request = new HttpGet(url.toString());
HttpClient httpClient = new DefaultHttpClient();
HttpResponse response = httpClient.execute(request);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
byte[] bytes = EntityUtils.toByteArray(entity);
Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0,
bytes.length);
return bitmap;
} else {
throw new IOException("Download failed, HTTP response code "
+ statusCode + " - " + statusLine.getReasonPhrase());
}
}