protected Bitmap doInBackground(String...params) {
// TODO Auto-generated method stub
try {
/* Open a new URL and get the InputStream to load data from it. */
URL aURL = new URL(params[0]);
URLConnection conn = aURL.openConnection();
conn.connect();
InputStream is = conn.getInputStream();
/* Buffered is always good for a performance plus. */
BufferedInputStream bis = new BufferedInputStream(is);
/* Decode url-data to a bitmap. */
Bitmap bm = BitmapFactory.decodeStream(bis);
b1=bm;
bis.close();
is.close();
} catch (IOException e)
{
Log.e("DEBUGTAG", "Remote Image Exception", e);
}
return null;
}
// TODO Auto-generated method stub
super.onPostExecute(result);
i1.setImageBitmap(b1);
Animation rotation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.rotate);
i1.startAnimation(rotation);
//System.out.println("imageview is working");
try {
System.out.println("thread going to sleep");
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
i1.setImageBitmap(b1);
}
i am showing an image from the internet in an imageview through a bitmap now i am having another image this bitmap in by updating the url but i am not able to show the this image only previous image is showing,and if i run this in a loop only the last image is shwoing?any suggestions
Call this from your OnCreate or from where ever you want to initial the download of code from network
new Thread(new Runnable() {
public void run() {
Drawable drawable = createDrawableFromURL(_mDrawingURL);
Message msgURL = new Message();
msgURL.arg2 = URL_CONSTANT;
msgURL.obj = drawable;
_handler_url.sendMessage(msgURL);
}
}).start();
} catch (JSONException e) {
e.printStackTrace();
}
}
This method will be used to download the image from internet:
private Drawable createDrawableFromURL(String urlString) {
Drawable image = null;
try
{
InputStream inputStream = new URL(urlString).openStream();
image = Drawable.createFromStream(inputStream, null);
inputStream.close();
}
catch (MalformedURLException e) {
e.printStackTrace();
image = null;
} catch (IOException e) {
e.printStackTrace();
image = null;
}
return image;
}
After downloading the image, the imageview will be update with the image.:
private Handler _handler_url = new Handler(){
public void dispatchMessage(Message msg) {
switch (msg.arg2) {
case URL_CONSTANT:
Drawable drawable = (Drawable) msg.obj;
if(drawable!=null)
_mImageView.setImageDrawable(drawable);
break;
default:
break;
}
};
};
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
I'm trying to use WallpaperManager in a ViewPager. I've got a button which is supposed to set the current image in the ViewPager to wallpaper. My problem comes with the line of code wallpManager.setResource(newInt);... the integer it comes up with is always 0 (zero), and so the app crashes and LogCat says there's no Resource at ID #0x0. As a test to see if I'm getting the correct image URL I've done this:
String newStr = images[position];
CharSequence cs = newStr;
Toast.makeText(UILPager.this, cs, Toast.LENGTH_SHORT).show();
And the resulting Toast shows the correct image URL. I can't figure out how to convert the URL which is in the form of "http://www.example.com/image.jpg" to an Integer so that the WallpaperManager can use it. Here's what the whole button code looks like:
wallp_BTN.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
WallpaperManager wallpManager = WallpaperManager.getInstance(getApplicationContext());
String newStr = images[position];
int newInt = 0;
try{
newInt = Integer.parseInt(newStr);
} catch(NumberFormatException nfe) {
}
CharSequence cs = newStr;
try {
wallpManager.setResource(newInt);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Toast.makeText(UILPager.this, cs, Toast.LENGTH_SHORT).show();
}
});
Set wallpaper from URL
try {
URL url = new URL("http://developer.android.com/assets/images/dac_logo.png");
Bitmap bitmap = BitmapFactory.decodeStream(url.openStream());
wallpaperManager.setBitmap(bitmap);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Enjoy =)
A method wallpaperManager.setResource() requires resource id from your application. Example: I've ImageView with id "myImage" then call the method will look like as wallpaperManager.setResource(R.id.myImage).
In your case your id not valid.
Instead of wallpManager.setResource(0) you should use the wallpManager.setResource(R.drawable.yourimage) since it's expecting a drawable and there is none in your app with id = 0.
In your code
String newStr = images[position];
int newInt = 0;
try{
newInt = Integer.parseInt(newStr);
} catch(NumberFormatException nfe) {
}
Since newStr is never a number, always a url so NumberFormatException is caught always. Hence the value of newInt is always initialized to 0. Hence the error.
I realized that I have to download the image before I can set it as wallpaper! Thanks for your help AndroidWarrior and Owl. When I get the download code worked out, I'll post it. Owl showed me how to download the wallpaper:
//--- Wallpaper button
wallp_BTN.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
try {
vpURL = new URL(images[position]);
} catch (MalformedURLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
WallpaperManager wallpManager = WallpaperManager.getInstance(getApplicationContext());
try {
Bitmap bitmap = BitmapFactory.decodeStream(vpURL.openStream());
wallpManager.setBitmap(bitmap);
Toast.makeText(UILPager.this, "The wallpaper has been set!", Toast.LENGTH_LONG).show();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
//--- END Wallpaper button
... and I also figured out how to download the ViewPager image as well (I need to do both in different areas of my app):
//--- Wallpaper button
wallp_BTN.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
String vpURLStr = images[position];
GetVPImageTask downloadVPImageTask = new GetVPImageTask();
downloadVPImageTask.execute(new String[] { vpURLStr });
}
});
//--- END Wallpaper button
//--- Download ViewPager Image AsyncTask
private class GetVPImageTask extends AsyncTask<String, Void, Bitmap> {
ProgressDialog getVPImageDia;
#Override
protected void onPreExecute() {
super.onPreExecute();
getVPImageDia = new ProgressDialog(UILNPPager.this);
getVPImageDia.setMessage("Grabbing the image...");
getVPImageDia.setIndeterminate(false);
getVPImageDia.show();
}
#Override
protected Bitmap doInBackground(String... urls) {
Bitmap map = null;
for (String url : urls) {
map = downloadImage(url);
}
return map;
}
// Sets the Bitmap returned by doInBackground
#Override
protected void onPostExecute(Bitmap result) {
try {
getVPImageDia.dismiss();
getVPImageDia = null;
} catch (Exception e) {
// nothing
}
Toast.makeText(UILNPPager.this, "The image be Downloaded!", Toast.LENGTH_SHORT).show();
//downloaded_iv.setImageBitmap(result);
}
// Creates Bitmap from InputStream and returns it
private Bitmap downloadImage(String url) {
Bitmap bitmap = null;
InputStream stream = null;
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inSampleSize = 1;
try {
stream = getHttpConnection(url);
bitmap = BitmapFactory.
decodeStream(stream, null, bmOptions);
stream.close();
} catch (IOException e1) {
e1.printStackTrace();
}
return bitmap;
}
// Makes HttpURLConnection and returns InputStream
private InputStream getHttpConnection(String urlString)
throws IOException {
InputStream stream = null;
URL url = new URL(urlString);
URLConnection connection = url.openConnection();
try {
HttpURLConnection httpConnection = (HttpURLConnection) connection;
httpConnection.setRequestMethod("GET");
httpConnection.connect();
if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
stream = httpConnection.getInputStream();
}
} catch (Exception ex) {
ex.printStackTrace();
}
return stream;
}
}
//--- END Download ViewPager Image AsyncTask
i am using json parsing in my url a very big size images are there and i want get those images but not downloaded .....can any body help me to get those images
my code is as followsenter code here
public class Image extends Activity{
String imageBaseDirectory = "http://www.dha.com.tr/newpics/news/";
Bitmap bit;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.image);
ImageView img=(ImageView)findViewById(R.id.ImageView01);
img.setImageBitmap(convertImage(imageBaseDirectory));
}
public Bitmap convertImage(String s)
{
URL aURL = null;
try
{
final String imageUrl =s.replaceAll(" ","%20");
Log.e("Image Url",imageUrl);
aURL = new URL(imageUrl);
URLConnection conn = aURL.openConnection();
InputStream is = conn.getInputStream();
//#SuppressWarnings("unused")
BufferedInputStream bis = new BufferedInputStream(is);
Bitmap bm = BitmapFactory.decodeStream(new PatchInputStream(bis));
if(bm==null){}
else
bit=Bitmap.createScaledBitmap(bm,60, 60, true);
return bit;
}
catch(Exception e)
{
e.printStackTrace();
return null;
}
}
Try this code I hope it will help.
private Bitmap LoadPhotoFromServer(String path){
Bitmap bm=null;
URL url = null;
try {
url = new URL(path);
} catch (MalformedURLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try{
HttpURLConnection httpConnection=(HttpURLConnection)url.openConnection();
httpConnection.setDoInput(true);
httpConnection.connect();
//int lengthOfFile=httpConnection.getContentLength();
InputStream inputStream=httpConnection.getInputStream();
bm=BitmapFactory.decodeStream(inputStream);
}
catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return bm;
}
In my app, when you click on the button then I am downloading the images from the url's. It displaying the images some time correctly but some time it display empty. *problem is some times bitmap object(i.e, "result" in code ) return null.*please can anybody help me.
Following is my code
try
{
String ImageUrl = ((eachReview)RB_Constant.revht.get(title_value)).UserImageUrl;
System.out.println("Image Url:"+ImageUrl);
if(ImageUrl != null)
{
DownLoadImageInAThreadHandler(ImageUrl,holder);
}
else
{
System.out.println("Image url is null then display the default image");
holder.userImage.setImageResource(R.drawable.defaultuserimage);
}
}
catch(Exception e){
System.out.println("Error from Userimage fetching.."+e.toString());
}
private void DownLoadImageInAThreadHandler(final String imgurl,final ViewHolder holder)
{
//Thread for getting the attributes values
Thread t = new Thread()
{
public void run()
{
try
{
Bitmap drawable = getDrawableFromUrl(imgurl);
System.out.println("Drawable(after downloading):"+drawable);
if(drawable != null)
{
holder.userImage.setImageBitmap(drawable);
}
else
{
System.out.println("after downloading drawable is null then set the default image");
holder.userImage.setImageResource(R.drawable.defaultuserimage);
}
}
catch(Exception exp)
{
System.out.println("Exception in DownLoadImageInAThread : " + exp.getMessage());
}
}
private Bitmap getDrawableFromUrl(String imageUrl)
{
try
{
URL myFileUrl = new URL(imageUrl);
HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
final Bitmap result = BitmapFactory.decodeStream(is);
is.close();
new Thread() {
public void run() {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
if(result != null)
{
result.compress(Bitmap.CompressFormat.JPEG, 40, bytes);
}
}
}.start();
return result;
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (MalformedURLException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
return null;
}
};
t.start();
}
Try making you getDrawableFromUrl as:
public static Drawable getDrawableFromUrl(String url) {
Drawable image = null;
try {
InputStream in = (java.io.InputStream) new java.net.URL(url).getContent();
if (in != null) {
image = Drawable.createFromStream(in, "image");
in.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
return image;
}
Also do not compress image within same function. Try Doing it after you successfully receive an image. One thing more that write getDrawableFromUrl function out of the thread but in same class. Hope this works for you.
I used the code below to fetch the image from a url but it doesn't working for large images.
Am I missing something when fetching that type of image?
imgView = (ImageView)findViewById(R.id.ImageView01);
imgView.setImageBitmap(loadBitmap("http://www.360technosoft.com/mx4.jpg"));
//imgView.setImageBitmap(loadBitmap("http://sugardaddydiaries.com/wp-content/uploads/2010/12/how_do_i_get_sugar_daddy.jpg"));
//setImageDrawable("http://sugardaddydiaries.com/wp-content/uploads/2010/12/holding-money-copy.jpg");
//Drawable drawable = LoadImageFromWebOperations("http://www.androidpeople.com/wp-content/uploads/2010/03/android.png");
//imgView.setImageDrawable(drawable);
/* try {
ImageView i = (ImageView)findViewById(R.id.ImageView01);
Bitmap bitmap = BitmapFactory.decodeStream((InputStream)new URL("http://sugardaddydiaries.com/wp-content/uploads/2010/12/holding-money-copy.jpg").getContent());
i.setImageBitmap(bitmap);
} catch (MalformedURLException e) {
System.out.println("hello");
} catch (IOException e) {
System.out.println("hello");
}*/
}
protected Drawable ImageOperations(Context context, String string,
String string2) {
// TODO Auto-generated method stub
try {
InputStream is = (InputStream) this.fetch(string);
Drawable d = Drawable.createFromStream(is, "src");
return d;
} catch (MalformedURLException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
You're trying to download the Large Image from within the UI Thread....This will cause an ANR (Application not Responding)
Use AsyncTask to download the images, that way, a seperate thread will be used for the download and your UI Thread wont lock up.
see this good example that loads image from server.
blog.sptechnolab.com/2011/03/04/android/android-load-image-from-url/.
If you want to download the image very quickly then you can use AQuery which is similar to JQuery just download the android-query.0.15.7.jar
Import the jar file and add the following snippet
AQuery aq = new AQuery(this);
aq.id(R.id.image).image("http://4.bp.blogspot.com/_Q95xppgGoeo/TJzGNaeO8zI/AAAAAAAAADE/kez1bBRmQTk/s1600/Sri-Ram.jpg");
// Here R.id.image is id of your ImageView
// This method will not give any exception
// Dont forgot to add Internet Permission
public class MyImageActivity extends Activity
{
private String image_URL= "http://home.austarnet.com.au/~caroline/Slideshows/Butterfly_Bitmap_Download/slbutfly.bmp";
private ProgressDialog pd;
private Bitmap bitmap;
private ImageView bmImage;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
bmImage = (ImageView)findViewById(R.id.imageview);
pd = ProgressDialog.show(this, "Please Wait", "Downloading Image");
DownloadWebPageTask task = new DownloadWebPageTask();
task.execute(new String[] { image_URL });
// You can also give more images in string array
}
private class DownloadWebPageTask extends AsyncTask<String, Void, Bitmap>
{
// String --> parameter in execute
// Bitmap --> return type of doInBackground and parameter of onPostExecute
#Override
protected Bitmap doInBackground(String...urls) {
String response = "";
for (String url : urls)
{
InputStream i = null;
BufferedInputStream bis = null;
ByteArrayOutputStream out =null;
// Only for Drawable Image
// try
// {
// URL url = new URL(image_URL);
// InputStream is = url.openStream();
// Drawable d = Drawable.createFromStream(is, "kk.jpg");
// bmImage.setImageDrawable(d);
// }
// catch (Exception e) {
// // TODO: handle exception
// }
// THE ABOVE CODE IN COMMENTS WILL NOT WORK FOR BITMAP IMAGE
try
{
URL m = new URL(image_URL);
i = (InputStream) m.getContent();
bis = new BufferedInputStream(i, 1024*8);
out = new ByteArrayOutputStream();
int len=0;
byte[] buffer = new byte[4096];
while((len = bis.read(buffer)) != -1)
{
out.write(buffer, 0, len);
}
out.close();
bis.close();
byte[] data = out.toByteArray();
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
}
catch (Exception e)
{
e.printStackTrace();
}
}
return bitmap;
}
#Override
protected void onPostExecute(Bitmap result)
{
if(result!=null)
bmImage.setImageBitmap(result);
pd.dismiss();
}
}
}