Develop Reference

Display an image without saving it

My app can download an image from a raspberry. it works fine. This is the code
public void downloadFile() {
FTPClient ftpClient = new FTPClient();
try {
ftpClient.connect("******");
ftpClient.login("****","*****");
ftpClient.enterLocalPassiveMode();
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
String remoteFile1;
File downloadFile1 = new File(filePath);
OutputStream outputStream1 = new BufferedOutputStream(new FileOutputStream(downloadFile1));
boolean success = ftpClient.retrieveFile(remoteFile1, outputStream1);
outputStream1.close();
if (success) {
System.out.println("File #1 has been downloaded successfully.");
} else {
System.out.println("Error in downloading file !");
}
boolean logout = ftpClient.logout();
if (logout) {
System.out.println("Connection close...");
}
} catch (IOException ex) {
System.out.println("Error: " + ex.getMessage());
ex.printStackTrace();
} finally {
try {
ftpClient.disconnect();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
And then I can display it so the user of my app can see it. For the image loading, Im using this code and it works too.
private void loadImage(String imagePath) {
Uri imageUri;
String fullImagePath;
Drawable image;
ImageView imageDisplay;
imageUri = Uri.parse(imagePath);
fullImagePath = imageUri.getPath();
image = Drawable.createFromPath(fullImagePath);
imageDisplay=(ImageView) findViewById(R.id.imageDisplay);
imageDisplay.setImageDrawable(image);
}
Now I want to display the image without downloading it in my gallery. But I can't figure out how to do this.
Can someone help me please.

You cannot show an image without download it. Actually when you see something "remotely", you are downloading it.
If you mean that the image is too large and you don't want to download, but want a mechanism for the user can view it. One possible solution is make a thumbnail (reduced image) in server side and show that "preview" to the user. Then if the user want to download it to the gallery you could get the original image.

If you want to display an image without downloading it, it has to be uploaded in a image hosting site or alike so you will just use the link instead of the whole FTP Client.
Basically, you are using a code that is intended for saving an image. And the one you are using for loading the images fetches data from the Drawable. So you are in the wrong path.

How to load one image in android WITH OUT download

know anyone of you how can I use one photo from URL with out download? Because I can have a lot of images and if my application CANT download all of them...
I've found one function on web he how can do this but it don't work.
public static Drawable LoadImageFromWebOperations(String url) {
try {
InputStream is = (InputStream) new URL(url).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
return d;
} catch (Exception e) {
return null;
}
}
I really need that, so have anyone any idea?

You can use Picasso lib for downloading image from url:
http://square.github.io/picasso/
Example:
Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);

Displaying Images parsed from JSOUP in android?

I've been trying to develop an android app that parses through a specific (business's) website, and display the head image of the site on the top, news on the bottom, and have buttons below it that will open a new activity to display the schedule for the business, and any other information about the business. I decided to use JSOUP, which I am very new to, but I can't figure out how it is that I go about displaying images. I tried something like this, but it didn't work:
ImageView image = (ImageView) findViewById(R.id.headImage);
Document doc = Jsoup.connect("http://www.example.com/").get();
Elements divs = doc.select("img");
for (Element div : divs) {
Log.d("web Stuff",div.text());
text.setText(text.getText() + "\n" + div.text());
Element myImage = div;
String url = myImage.absUrl("src");
image.setImageDrawable(Drawable.createFromPath(url));
}
how am I supposed to correctly implement something like this?

I would load the image in a new thread if you want to do it for more than one image.
public void run() {
URL url = new URL(url);
Bitmap bitmap = BitmapFactory.decodeStream(url.openStream());
}
when the Thread is finished you can set the image of the imageview.
image.setImageBitmap(bitmap);

Drawable drw =LoadImageFromWebOperations(image_url);
im.setImageDrawable(drw);
private Drawable LoadImageFromWebOperations(String strPhotoUrl)
{
try
{
InputStream is = (InputStream) new URL(strPhotoUrl).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
return d;
}catch (Exception e) {
System.out.println("Exc="+e);
return null;
}
}

Why my Image from remote server appeared smaller?

I have an image in one of my Activities, and this is control by a remote server. My problem is, whenever I use this code, the image appears smaller on my phone but not in emulator. I want the image to appear just like its original size. Can someone tell me what I am doing wrong. Thanks in advance!
ImageView imgView =(ImageView )findViewById(R.id.image01);
Drawable drawable = LoadImageFromWebOperations("http://www.yourimage.com");
imgView.setBackgroundDrawable(drawable);
}
private Drawable LoadImageFromWebOperations(String url) {
try {
InputStream is = (InputStream) new URL(url).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
return d;
}
catch (Exception e) {
System.out.println("Exc="+e);
return null;
}
}
Here is my xml:
<ImageView
android:id="#+id/image01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"

you can try changing drawable to Bitmap with commant:
(BitmapDrawable)drawable).getBitmap())
and change the size of bitmap
b = Bitmap.createScaledBitmap(((BitmapDrawable)drawicon).getBitmap(), your_size_W, your_size_H, true);
and use: setImageBitmap to show in ImageView

Invoke the image directly from website to our app

I want to use the image directly from website. I did not place that image in drawable folder. For this purpose what can I do?
Please, give me some suggestions.

I've written a function that creates a Drawable from an image url, look below:
private Drawable downloadThumbnails(String url) {
Drawable d = null;
try {
InputStream is = (InputStream) this.fetch(url);
d = Drawable.createFromStream(is, "src_from_stream");
return d;
} catch (MalformedURLException e) {
} catch (IOException e) {
}
return null;
}
public Object fetch(String address) throws MalformedURLException, IOException {
URL url = new URL(address);
Object content = url.getContent();
return content;
}
then use it like this:
Drawable img = downloadThumbnails("http://yoururl.com/image.png");
yourImageView.setImageDrawable(img);

I strongly recommend using Picasso:
Picasso.with(context).load("http://an.url.com/lovely_cats.png").into(imageView);
It has a lot of usefull functions that allows you to:
crop the image
resize the image
rotate the image
fit an image into the target view
replace not downloaded file with local placeholder
an even more - mostly in a single line (or call).