我遇到了这个问题。我从web url（虽然它是localHost）和其他东西中获取了图像。 然而，其他东西出现了，但图像不是。 我无法弄清楚出了什么问题。 我发布了我班级的代码。看看这个。 这是代码：
public void updateJSONData() {
int success;
Bitmap photo = null;
Intent in = getIntent();
Bundle extras = in.getExtras();
String city = extras.getString("CITY");
Log.d(TAG, "City received: " + city);
try {
JSONParser jParser = new JSONParser();
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("CITY", city));
JSONObject json = jParser.makeHttpRequest(FETCH_HOSTEL_URL, "POST",
params);
Log.d("Json response", json.toString());
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
mHostels = json.getJSONArray(TAG_HOSTELS);
mHostelList = new ArrayList<HashMap<String, Object>>();
for (int i = 0; i < mHostels.length(); i++) {
JSONObject c = mHostels.getJSONObject(i);
Drawable d = null;
String hos_name = c.getString(TAG_NAME);
String hos_rent = c.getString(TAG_RENT);
// String hos_img = c.getString(TAG_IMG);
String hos_imgURL = "http://192.168.2.10:80/homey_uploads/avtars/IMG_-137606592.jpg";
try {
getBitmapFromUrl(hos_imgURL);
photo = bmp;
cityCap.setImageBitmap(photo);
} catch (Exception ex) {
Log.d(TAG, "Bitmap Not Received");
}
HashMap<String, Object> map = new HashMap<String, Object>();
map.put(TAG_NAME, hos_name);
map.put(TAG_RENT, hos_rent);
map.put(TAG_IMG, photo);
mHostelList.add(map);
Log.d(TAG, "Map Addedd!!" + mHostelList.toString());
}
} else if (success == 0) {
Log.d(TAG, "Fetch Failure!!");
done = false;
msg = json.getString(TAG_MESSAGE);
}
} catch (Exception e) {
Log.d(TAG, "Exception occured:" + e.toString());
done = false;
}
}
private static Bitmap getBitmapFromUrl(String hos_imgURL) throws IOException {
URL IMGURL = new URL(hos_imgURL);
Log.d(TAG, "Image Url:" + IMGURL.toString());
HttpURLConnection conn = (HttpURLConnection) IMGURL.openConnection();
conn.setDoInput(true);
conn.connect();
conn.setConnectTimeout(30000);
conn.setReadTimeout(30000);
InputStream is = conn.getInputStream();
bmp = BitmapFactory.decodeStream(is);
return bmp;
}
public void updateList() {
// LazyAdapter adapter = new LazyAdapter(SearchResult.this,
// mHostelList);
ListAdapter adapter = new SimpleAdapter(SearchResult.this, mHostelList,
R.layout.single_hostel, new String[] { TAG_NAME, TAG_RENT,
TAG_IMG }, new int[] { R.id.tv_h_name, R.id.tv_h_rent,
R.id.iv_h_frontPic });
SimpleAdapter.ViewBinder viewBinder = new SimpleAdapter.ViewBinder() {
@Override
public boolean setViewValue(View view, Object data,
String textRepresentation) {
if (view.getId() == R.id.tv_h_name) {
((TextView) view).setText((String) data);
return true;
} else if (view.getId() == R.id.tv_h_rent) {
((TextView) view).setText((String) data);
} else if (view.getId() == R.id.iv_h_frontPic) {
((ImageView) view).setImageBitmap((Bitmap) data);
}
return false;
}
};
((SimpleAdapter) adapter).setViewBinder(viewBinder);
setListAdapter(adapter);
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(SearchResult.this,
HDetailTabActivity.class);
startActivity(intent);
}
});
}
public class LoadHostels extends AsyncTask<Void, Void, Boolean> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(SearchResult.this);
pDialog.setMessage("Loading Hostels");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected Boolean doInBackground(Void... arg0) {
updateJSONData();
return null;
}
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
pDialog.dismiss();
if (done != true) {
Toast.makeText(SearchResult.this, "Error:" + msg,
Toast.LENGTH_LONG).show();
} else if (done = true) {
updateList();
}
}
}
Logcat说无法解码流，但是当我将图像设置为另一个图像时，它显示出来了。 附加Logcat：
04-12 14:38:34.857: D/TRACKING...(8616): Map Addedd!![{h_img=android.graphics.Bitmap@4149d108, h_name=M R Hostel, h_d_mrent=4500}, {h_img=android.graphics.Bitmap@41600b78, h_name=Hostel Of Achievers, h_d_mrent=3500}, {h_img=android.graphics.Bitmap@414edd18, h_name=Hostel Of Care, h_d_mrent=2500}]
04-12 14:38:34.860: D/OpenGLRenderer(8616): Flushing caches (mode 0)
04-12 14:38:34.898: E/BitmapFactory(8616): Unable to decode stream: java.io.FileNotFoundException: /android.graphics.Bitmap@4149d108: open failed: ENOENT (No such file or directory)
04-12 14:38:34.898: I/System.out(8616): resolveUri failed on bad bitmap uri: android.graphics.Bitmap@4149d108
04-12 14:38:34.914: E/BitmapFactory(8616): Unable to decode stream: java.io.FileNotFoundException: /android.graphics.Bitmap@41600b78: open failed: ENOENT (No such file or directory)
04-12 14:38:34.914: I/System.out(8616): resolveUri failed on bad bitmap uri: android.graphics.Bitmap@41600b78
04-12 14:38:34.929: E/BitmapFactory(8616): Unable to decode stream: java.io.FileNotFoundException: /android.graphics.Bitmap@414edd18: open failed: ENOENT (No such file or directory)
04-12 14:38:34.929: I/System.out(8616): resolveUri failed on bad bitmap uri: android.graphics.Bitmap@414edd18
请帮助!!!
答案 0 :(得分：3)
SimpleAdapter不支持将Bitmap设置为开箱即用的ImageView - 仅限资源ID或字符串网址。
因此，您需要扩展SimpleAdapter.ViewBinder以提供自己的绑定逻辑：
SimpleAdapter.ViewBinder viewBinder = new SimpleAdapter.ViewBinder() {
@Override
public boolean setViewValue(View view, Object data, String textRep) {
if (view.getId() == R.id.tv_h_name) {
((TextView)view).setText((String)data);
return true;
} else if (view.getId() == R.id.tv_h_rent) {
// same here
} else if (view.getId() == R.id.iv_h_frontPic) {
((ImageView)view).setImageBitmap((Bitmap)data);
return true;
}
return false;
}
}
((SimpleAdapter)adapter).setViewBinder(viewBinder);