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我想在列表视图中显示餐馆名称及其图像。我正在成功地获得餐饮的名字，但没有得到images.this是我code.i've acctach我的输出屏幕上，你可以看到，餐饮业名称显示，但图像没有displying他们应该左手边设置图像在列表视图中不工作在Android
public class RestaurantSelect extends Activity {
ProgressDialog mProgressDialog;
ListView listview;
private String key,ResCategory,url;
private SimpleAdapter listadapter;
JsonArray jobj= new JsonArray();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_restaurant_select);
new AreaPOP().execute();
listview = (ListView) findViewById(R.id.listResturent);
Intent in = getIntent();
try
{
if(!in.getStringExtra("AreaID").isEmpty())
{
//url="http://192.168.0.2/cityapp/GETresturentByArea.php";
url="http://www.mycityapp.co.in/api/GETresturentByArea.php";
key=in.getStringExtra("AreaID");
}
}
catch (Exception e)
{
//url="http://192.168.0.2/cityapp/GETresturentByCategory.php";
url="http://www.mycityapp.co.in/api/GETresturentByCategory.php";
key=in.getStringExtra("ResCategory");
}
listview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
//http://saigeethamn.blogspot.in/2010/04/custom-listview-android-developer.html
//http://www.androidhive.info/2012/01/android-json-parsing-tutorial/
//http://digitallibraryworld.com/?p=195
HashMap fullObject = (HashMap)arg0.getItemAtPosition(position);
Intent in = new Intent(getApplicationContext(), RestaurantDetail.class);
in.putExtra("ResID", fullObject.get("rowid").toString());
startActivity(in);
}
});
}
private class AreaPOP extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog = new ProgressDialog(RestaurantSelect.this);
mProgressDialog.setTitle("getting data");
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
mProgressDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
// String url_create_product="http://www.mycityapp.co.in/api/GETresturent.php";
List<NameValuePair> paramsRes = new ArrayList<NameValuePair>();
paramsRes.add(new BasicNameValuePair("key", key));
JSONArray json = jobj.makeHttpRequest(url,"POST", paramsRes);
List<HashMap<String, Object>> listdata = new ArrayList<HashMap<String, Object>>();
JSONObject c;
for (int i=0;i<json.length();i++){
try {
HashMap<String,Object> temp = new HashMap<String,Object>();
c = json.getJSONObject(i);
temp.put("rowid",c.getString("rowid"));
temp.put("restaurantname", c.getString("restaurantname").toUpperCase());
temp.put("resMainImg", c.getString("resMainImg"));
temp.put("img",R.drawable.ic_launcher);
listdata.add(temp);
} catch (Exception e) {
e.printStackTrace();
}
}
listadapter = new SimpleAdapter(RestaurantSelect.this,listdata,R.layout.custom_row_view,new String[] {"restaurantname","resMainImg"},new int[] {R.id.txtListRest,R.id.imgListRestMainPic});
return null;
}
@Override
protected void onPostExecute(Void args) {
listview.setAdapter(listadapter);
for(int i=0;i<listadapter.getCount();i++){
HashMap<String, Object> hm = (HashMap<String, Object>) listadapter.getItem(i);
String imgUrl = (String) hm.get("resMainImg");
ImageLoaderTask imageLoaderTask = new ImageLoaderTask();
HashMap<String, Object> hmDownload = new HashMap<String, Object>();
hm.put("resMainImg",imgUrl);
hm.put("position", i);
// Starting ImageLoaderTask to download and populate image in the listview
imageLoaderTask.execute(hm);
}
mProgressDialog.dismiss();
}
}
private class ImageLoaderTask extends AsyncTask<HashMap<String, Object>, Void, HashMap<String, Object>>{
@Override
protected HashMap<String, Object> doInBackground(HashMap<String, Object>... hm) {
InputStream iStream=null;
String imgUrl = (String) hm[0].get("resMainImg");
int position = (Integer) hm[0].get("position");
URL url;
try {
url = new URL(imgUrl);
// Creating an http connection to communicate with url
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
// Connecting to url
urlConnection.connect();
// Reading data from url
iStream = urlConnection.getInputStream();
// Getting Caching directory
File cacheDirectory = getBaseContext().getCacheDir();
// Temporary file to store the downloaded image
File tmpFile = new File(cacheDirectory.getPath() + "/wpta_"+position+".png");
// The FileOutputStream to the temporary file
FileOutputStream fOutStream = new FileOutputStream(tmpFile);
// Creating a bitmap from the downloaded inputstream
Bitmap b = BitmapFactory.decodeStream(iStream);
// Writing the bitmap to the temporary file as png file
b.compress(Bitmap.CompressFormat.PNG,100, fOutStream);
// Flush the FileOutputStream
fOutStream.flush();
//Close the FileOutputStream
fOutStream.close();
// Create a hashmap object to store image path and its position in the listview
HashMap<String, Object> hmBitmap = new HashMap<String, Object>();
// Storing the path to the temporary image file
hmBitmap.put("flag",tmpFile.getPath());
// Storing the position of the image in the listview
hmBitmap.put("position",position);
// Returning the HashMap object containing the image path and position
return hmBitmap;
}catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(HashMap<String, Object> result) {
// Getting the path to the downloaded image
String path = (String) result.get("flag");
// Getting the position of the downloaded image
int position = (Integer) result.get("position");
// Getting adapter of the listview
SimpleAdapter adapter = (SimpleAdapter) listview.getAdapter();
// Getting the hashmap object at the specified position of the listview
HashMap<String, Object> hm = (HashMap<String, Object>) adapter.getItem(position);
// Overwriting the existing path in the adapter
hm.put("flag", path);
// Noticing listview about the dataset changes
adapter.notifyDataSetChanged();
}
}
}
我在logcat中得到这个。
10-16 14:13:33.096 14005-14005/com.example.db2admin.cityapp I/System.out﹕ resolveUri failed on bad bitmap uri: http://www.mycityapp.co.in/cityappimg/res4/menu/images1.jpg
10-16 14:13:33.098 14005-14005/com.example.db2admin.cityapp E/BitmapFactory﹕ Unable to decode stream: java.io.FileNotFoundException: http:/www.indiandelicacy.in/Content/Restaurant/26/original-Kansar-Gujarati-Thali-logo.jpg: open failed: ENOENT (No such file or directory)
10-16 14:13:33.098 14005-14005/com.example.db2admin.cityapp I/System.out﹕ resolveUri failed on bad bitmap uri: http://www.indiandelicacy.in/Content/Restaurant/26/original-Kansar-Gujarati-Thali-logo.jpg
10-16 14:13:33.101 14005-14005/com.example.db2admin.cityapp E/BitmapFactory﹕ Unable to decode stream: java.io.FileNotFoundException: http:/www.wokonfirechinese.com/html/images/wok-on-fire-chinese-logo.png: open failed: ENOENT (No such file or directory)
使用通用图像加载器库来处理图像 –