I use such code for downloading image from URL:
public static Bitmap downloadImage(String url) {
Bitmap bitmap = null;
InputStream in = null;
BufferedOutputStream out = null;
try {
in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);
final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
copy(in, out);
out.flush();
final byte[] data = dataStream.toByteArray();
BitmapFactory.Options options = new BitmapFactory.Options();
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
} catch (IOException e) {
Log.e(TAG, "Could not load Bitmap from: " + url);
} finally {
closeStream(in);
closeStream(out);
}
return bitmap;
}
When I send URL "http://java.sogeti.nl/JavaBlog/wp-content/uploads/2009/04/android_icon_256.png" it works fine, but when I use "http://www.hospimedica.com/images/stories/articles/article_images/_CC/20110328%20-%20DJB146.gif" it returns me null.
What's wrong with this URL?
Why are you writing your own method to downlaod an image ? Android has inbuilt method to achieve this.. Just use
URL url = new URL("Your url");
Bitmap bitmap = BitmapFactory.decodeStream(url.openConnection().getInputStream());
Related
My code: holder.icon.setImageResource(current.imageUrl); here the imageUrl is been declared in String. But setImageResource takes only int. Can anyone provide me a solution how to get a string or is there anyother method available for it?
I think u are fetch the image from internet.
private Bitmap getBitMapFromUrl( String imageuri){
HttpURLConnection connection=null;
try {
URL url=new URL(imageuri);
connection= (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream is=connection.getInputStream();
Bitmap mybitmap=BitmapFactory.decodeStream(is);
return mybitmap;
} catch (MalformedURLException e) {
e.printStackTrace();
return null;
}}
pass the string value and return the bitmap.
holder.icon.setImageBitmap(getBitmapFromUrl());
you are using the "setImageResource" !
it expects a Resource (usually a drawable resource), hence the int requirement.
the download solution suggested by #Mayuri Joshi might fit your needs, if not, please provide more information regarding what it is you are trying to accomplish :)
You have to download the image firstly
public static Bitmap loadBitmap(String url) {
Bitmap bitmap = null;
InputStream in = null;
BufferedOutputStream out = null;
try {
in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);
final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
copy(in, out);
out.flush();
final byte[] data = dataStream.toByteArray();
BitmapFactory.Options options = new BitmapFactory.Options();
//options.inSampleSize = 1;
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
} catch (IOException e) {
Log.e(TAG, "Could not load Bitmap from: " + url);
} finally {
closeStream(in);
closeStream(out);
}
return bitmap;
}
Then use the Imageview.setImageBitmap to set bitmap into the ImageView
I was wondering how i set a buttons background image from a URL on android.
The buttons id is blue if you need to know that.
I tried this but it didn't work.
public static Bitmap loadBitmap(String url) {
Bitmap bitmap = null;
InputStream in = null;
BufferedOutputStream out = null;
try {
in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);
final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
copy(in, out);
out.flush();
final byte[] data = dataStream.toByteArray();
BitmapFactory.Options options = new BitmapFactory.Options();
//options.inSampleSize = 1;
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
} catch (IOException e) {
Log.e(TAG, "Could not load Bitmap from: " + url);
} finally {
closeStream(in);
closeStream(out);
}
return bitmap;
}
I used the next code for obtain the bitmap, one important thing is sometimes you can't obtain the InputStream, and that is null, I make 3 attemps if that happens.
public Bitmap generateBitmap(String url){
bitmap_picture = null;
int intentos = 0;
boolean exception = true;
while((exception) && (intentos < 3)){
try {
URL imageURL = new URL(url);
HttpURLConnection conn = (HttpURLConnection) imageURL.openConnection();
conn.connect();
InputStream bitIs = conn.getInputStream();
if(bitIs != null){
bitmap_picture = BitmapFactory.decodeStream(bitIs);
exception = false;
}else{
Log.e("InputStream", "Viene null");
}
} catch (MalformedURLException e) {
e.printStackTrace();
exception = true;
} catch (IOException e) {
e.printStackTrace();
exception = true;
}
intentos++;
}
return bitmap_picture;
}
Don't load the image directly in the UI (main) thread, for it will make the UI freeze while the image is being loaded. Do it in a separate thread instead, for example using an AsyncTask. The AsyncTask will let the image load in its doInBackground() method and then it can be set as the button background image in the onPostExecute() method. See this answer: https://stackoverflow.com/a/10868126/2241463
Try this code:
Bitmap bmpbtn = loadBitmap(yoururl);
button1.setImageBitmap(bmpbtn);
I return a Bitmap object according to a url, and the code for download picture:
URL url = new URL(imageUrlStr);
URLConnection conn = url.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream in = conn.getInputStream();
Bitmap bitmap = BitmapFactory.decodeStream(in);
in.close
Then I save it to sdcard. It is ok to save picture.
Now the problem is it download the picture A when use this url to access. But it now shows another B picture in SDCARD. How to solve this problem？
You can identify images by hash-code. Not a perfect solution, good for the demo
private Bitmap getBitmap(String url) {
String filename = String.valueOf(url.hashCode());
File f = new File(cacheDir, filename);
// from SD cache
Bitmap b = decodeFile(f);
if (b != null)
return b;
// from web
try {
Bitmap bitmap = null;
InputStream is = new URL(url).openStream();
OutputStream os = new FileOutputStream(f);
CopyStream(is, os);
os.close();
bitmap = decodeFile(f);
return bitmap;
} catch (Exception ex) {
ex.printStackTrace();
return null;
}
}
private void CopyStream(InputStream is, OutputStream os) {
final int buffer_size = 1024;
try {
byte[] bytes = new byte[buffer_size];
for (;;) {
int count = is.read(bytes, 0, buffer_size);
if (count == -1)
break;
os.write(bytes, 0, count);
}
} catch (Exception ex) {
}
}
/** decodes image and scales it to reduce memory consumption*/
private Bitmap decodeFile(File f) {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
return BitmapFactory.decodeStream(new FileInputStream(f));
} catch (FileNotFoundException e) {
}
return null;
}
Use you just need to use method "getBitmap(String)" with your desired url as String
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
how to load an imageview by url in android?
I am having an image URL.I want to set that image as my ImageViews background.
Please help..
I Hope This code Help you.
public static Bitmap loadBitmap(String url) {
Bitmap bitmap = null;
InputStream in = null;
BufferedOutputStream out = null;
try {
in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);
final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
copy(in, out);
out.flush();
final byte[] data = dataStream.toByteArray();
BitmapFactory.Options options = new BitmapFactory.Options();
//options.inSampleSize = 1;
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
} catch (IOException e) {
Log.e(TAG, "Could not load Bitmap from: " + url);
} finally {
closeStream(in);
closeStream(out);
}
return bitmap;
}
Then Use imageView.setImageBitmap(bitmap);
Check this Link How to display image from URL on Android
You can then use setBackgroundDrawable() with the drawable created from the URL.
Hey there- I'm attempting to load an image within a Live Wallpaper via a URL... is it possible? If so can you tell my why this code isn't working (Log - "Could not load Bitmap from: " + url)? Thanks!
Engine - Runnable - run():
...
c = holder.lockCanvas();
if (c != null) {
try {
final Bitmap b = BitmapUtils.loadBitmap("http://mw2.google.com/mw-panoramio/photos/medium/17287086.jpg");
c.drawBitmap(b, 0, 0, null);
} catch (Exception e) {
Log.e("Debug", e.toString());
}
}
...
BitmapUtils
public static Bitmap loadBitmap(String url) {
Bitmap bitmap = null;
InputStream in = null;
BufferedOutputStream out = null;
try {
in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);
final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
copy(in, out);
out.flush();
final byte[] data = dataStream.toByteArray();
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
} catch (IOException e) {
Log.e(TAG, "Could not load Bitmap from: " + url);
} finally {
closeStream(in);
closeStream(out);
}
return bitmap;
}
Yes, it is possible. I do it all the time. :-)
Probably your "issue" is that you have neglected to put
<uses-permission android:name="android.permission.INTERNET" />
in your AndroidManifest.xml