I made an app which can tell the weather when you enter the location .. the API is taken from OpenWeatherMap.org and its displaying the weather .. i wanted to display the icon also i took the icon id and pasted in the link .. the image is not displaying..
try {
DownloadTask downloadTask = new DownloadTask();
String city = weatherInput.getText().toString();
Log.i("City name",city);
//used to encode the entered input for url.. for example San Fransisco appears in url
//as San%20Fransisco ... and to enable that we use the encoder...
String encodedCity = URLEncoder.encode(city,"UTF-8");
downloadTask.execute("http://api.openweathermap.org/data/2.5/weather?q=" + encodedCity +
"&appid=cd66504ca815ddc1971662a9f2147f84");
Log.i("Image id",icon);
ImageDownloader imageDownloader = new ImageDownloader();
myImage = imageDownloader
.execute("http://openweathermap.org/img/w/" + icon + ".png").get();
imageView.setImageBitmap(myImage);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
}
});
and here is the ImageDownloader class. icon is a global variable which i got when i parsed the API with other variables like weather conditions..
public class ImageDownloader extends AsyncTask<String, Void, Bitmap>{
#Override
protected Bitmap doInBackground(String... urls) {
URL url;
HttpURLConnection httpURLConnection;
try {
url = new URL(urls[0]);
httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.connect();
InputStream inputStream = httpURLConnection.getInputStream();
return BitmapFactory.decodeStream(inputStream);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
Please note that i have two AsyncTask classes in a single Activity so if its causing some error .. i have no idea about it..
Related
Good morning,
I have following code to download bitmpa from server
/*SAVE IMAGE++++++++++++++++++++*/
public void saveImage(Context context, Bitmap b, String imageName) {
FileOutputStream foStream;
try {
foStream = context.openFileOutput(imageName, Context.MODE_PRIVATE);
b.compress(Bitmap.CompressFormat.JPEG, 100, foStream);
foStream.close();
UPDTV_FOTO.setBackgroundColor(Color.GREEN);
image.setImageBitmap(loadImageBitmap(getApplicationContext(), Giocatore));
UPDTV_FOTO.setText("Download "+Giocatore+ " Complete");
}
catch (FileNotFoundException e) {
Log.d("saveImage", "file not found");
e.printStackTrace();
// UPDTV_FOTO.setText("FILE NOT FOUND");
}
catch (IOException e) {
Log.d("saveImage", "io exception");
e.printStackTrace();
// UPDTV_FOTO.setText("SAVE IMAGE ERROR");
}
}
/*SAVE IMAGE+++++++++++++++++++++++++*/
/*DOWNLOAD IMAGE++++++++++++++++++++++*/
private class DownloadImage extends AsyncTask<String, Void, Bitmap> {
private String TAG = "DownloadImage";
private Bitmap downloadImageBitmap(String sUrl) {
Bitmap bitmap = null;
try {
InputStream inputStream = new URL(sUrl).openStream(); // Download Image from URL
bitmap = BitmapFactory.decodeStream(inputStream); // Decode Bitmap
inputStream.close();
} catch (Exception e) {
Log.d(TAG, "Exception 1, Something went wrong!");
e.printStackTrace();
// UPDTV_FOTO.setText("DOWNLOAD ERROR");
}
return bitmap;
}
#Override
protected Bitmap doInBackground(String... params) {
return downloadImageBitmap(params[0]);
}
protected void onPostExecute(Bitmap result) {
saveImage(getApplicationContext(), result, Giocatore);
}
}
/*DOWNLOAD IMAGE++++++++++++++++++++++*/
/*LOAD IMAGE*+++++++++++++++++++++++++++++++++++++*/
public Bitmap loadImageBitmap(Context context, String imageName) {
Bitmap bitmap = null;
FileInputStream fiStream;
try {
fiStream = context.openFileInput(imageName);
bitmap = BitmapFactory.decodeStream(fiStream);
fiStream.close();
} catch (Exception e) {
Log.d("saveImage", "Exception 3, Something went wrong!");
e.printStackTrace();
// UPDTV_FOTO.setText("LOAD ERROR");
}
return bitmap;
}
/*LOAD IMAGE+++++++++++++++++++++++++++*/
if the bitmap I try to download is available on server all works fine with
new DownloadImage().execute(myurl);
else if is not available, my app crashes.
So I would like to check if bitmap is available on servere before starting download.
I try
if (URLUtil.isValidUrl(URL+FotoGiocatore)==true);
and also
How can I programmatically test an HTTP connection?
Check if file exists on remote server using its URL
You can also use below code to check if the image is present
URL url = new URL("YOUR URL");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
`int status = urlConnection.getResponseCode();`
and only start download if status==200
Given the URL of a website I want to retrieve the logo and background image of the website and display it in an android app. For example from this link I would want the background image and the hack western logo.
EDIT: I forgot to mention I am trying to achieve this effect for a list of URL's of undetermined size until run time
Use this AsyncTask for loading image from URL
public class LoadImageTask extends AsyncTask<Void, Void, Void>{
private Bitmap mMyBitmap;
#Override
protected Void doInBackground(Void... params) {
try {
URL url = new URL("https://hackwestern.com/images/logo_vert_spons.png");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
mMyBitmap = BitmapFactory.decodeStream(input);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
mImageView.setImageBitmap(mMyBitmap);
}
}
Then call it on OnCreate or somewhere you need:
new LoadImageTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
I am trying to set image on imageview but image is not show.
I am reading image url from json data and then trying to set it on ImageView but my image is not visible. No any exception occur.
Here is my code
HotelList.class
static final String TAG_DISHIMAGEURL = "dishimageurl";
......
String imageUrl = dishResult.getString(TAG_DISHIMAGEURL);
map.put(TAG_DISHIMAGEURL, imageUrl);
.....
dishimageurl1 = hm.get(TAG_DISHIMAGEURL).toString();
intent.putExtra("background", dishimageurl1);
HotelDetails.class
......
String dishimageurl = bundle.getString("background");
Bitmap bimage= getBitmapFromURL(dishimageurl);
imageView.setImageBitmap(bimage);
....
public Bitmap getBitmapFromURL(String src) {
try {
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
Toast.makeText(this, "showing image", Toast.LENGTH_LONG).show();
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
Toast.makeText(this, "showing exception", Toast.LENGTH_LONG).show();
return null;
}
}
I don't understand what happen with this code. No any exception but my image is not visible.
Please give me any reference.
Please Use below code for get image from url and display into imageview.
public class image extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Bitmap bitmap = DownloadImage("http://www.gophoto.it/view.php?i=http://1.bp.blogspot.com/-2LTvCCufBKc/T3L3KgcTj2I/AAAAAAAABbQ/Ki60e1LU9sE/s1600/Sachin%2BTendulkar.png");
RelativeLayout mRlayout1 = (RelativeLayout) findViewById(R.id.mRlayout1);
Drawable d=new BitmapDrawable(bitmap);
mRlayoutLogin.setBackgroundDrawable(d);
}
private InputStream OpenHttpConnection(String urlString) throws IOException {
InputStream in = null;
int response = -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection))
throw new IOException("Not an HTTP connection");
try {
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK) {
in = httpConn.getInputStream();
}
} catch (Exception ex) {
throw new IOException("Error connecting");
}
return in;
}
private Bitmap DownloadImage(String URL) {
Bitmap bitmap = null;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
bitmap = BitmapFactory.decodeStream(in);
in.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return bitmap;
}
}
you can view image by using this code.
try {
bitmap = BitmapFactory.decodeStream((InputStream)new URL(url).getContent());
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
It seems you are downloading the image from UI thread. this will block the UI thread and will give you not responding error. as an easy way, you can use a library like Universal Image Loader
Universal Image Loader - GitHub
this will manage the image loading for you and avoid problems like incorrect urls, Out Of Memory error.
I used the code as follows to show up facebook avatar to ImageView
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ImageView img = (ImageView) findViewById(R.id.imgAvatar);
img.setImageBitmap(getBitmapFromURL("http://graph.facebook.com/"+"100002394015528"+"/picture"));
}
public static Bitmap getBitmapFromURL(String src) {
try {
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}`
But does it not work. Please help me.
http://graph.facebook.com/id/picture doesn't return an image. It returns some response headers including a 302 redirect, and a location header.
Your example for instance redirects to: http://profile.ak.fbcdn.net/hprofile-ak-snc4/211619_100002394015528_568817_q.jpg
So instead of
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
You need to get the headers from the request, follow the location and then do what you were doing before. I don't know Android, or what language that is. (Java?) So I can't help with that, but I think this might be enough information to get you headed in the right direction.
Use this function for get real URL to avatar:
public static String getUrlFacebookUserAvatar(String name_or_idUser )
{
String address = "http://graph.facebook.com/"+name_or_idUser+"/picture";
URL url;
String newLocation = null;
try {
url = new URL(address);
HttpURLConnection.setFollowRedirects(false); //Do _not_ follow redirects!
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
newLocation = connection.getHeaderField("Location");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return newLocation;
}
I need to load, and update image from URL.
Using AsyncTask, Iam able to load image from URL bt i need to reload image from url for every 10 secs.
Please help me how i can solve this issue.
Thanks in advance
#Praveenb
try following ,
Bitmap bmImg;
void downloadFile(String fileUrl){
URL myFileUrl =null;
try {
myFileUrl= new URL(fileUrl);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
bmImg = BitmapFactory.decodeStream(is);
// it will decode the input stream and will load the bitmat in bmImg variable
imView.setImageBitmap(bmImg);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
following code works fine for me,
class DownloadImage extends AsyncTask<Void, Void, Drawable>{
#Override
protected Drawable doInBackground(Void... params) {
return Util.getImageFromURL(imageURL);
}
#Override
protected void onPostExecute( Drawable d ) {
getImageIcon().setImageDrawable(d);
}
}
new DownloadImage().execute();
and if you are showing image in list view you should follow this
http://github.com/commonsguy/cwac-thumbnail