Develop Reference

android download image port 69

there is an IP camera and I want to download a snapshot image.
this is the url : http://test:11223344!!#85.105.152.138:69/ISAPI/Streaming/channels/2/picture
as you can see; port is 69 not 80
this is my code:
ImageView img = findViewById(R.id.imgSnap);
new DownloadImageTask(img).execute("http://test:11223344!!#85.105.152.138:69/ISAPI/Streaming/channels/2/picture");
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap webImage = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
webImage = BitmapFactory.decodeStream(in);
} catch (Exception e) {
e.printStackTrace();
}
return webImage;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
I got FileNotFoundException. but I think the reason is port 69.
How can I get the image?

ImageView emptied on subsequent activity launches

I'm using this AsyncTask to load an image from a URL and populate an ImageView with that image:
new DownloadImageTask((ImageView) findViewById(R.id.headerIV)).execute(imageURL);
and
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
I noticed that whenever I background my app and relaunch the activity, the ImageViews are emptied. Various checks on the ImageViews show that they are null in onCreate(), and so if I want to show images again, I have to call the AsyncTask again, which eventually leads to out-of-memory exceptions. So, I'm wondering: Does the activity recycle/empty my ImageViews for some reasons on onPause() based on that code block I'm using?

Try this !!!!
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
Bitmap mIcon11;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
try {
mIcon11 = BitmapFactory.decodeStream((InputStream) new URL(urls[0]).getContent());
} catch (Exception e) {
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
if (result != null) {
bmImage.setImageBitmap(result);
} else {
Toast.makeText(TestActivity.this, "Image Does Not exist or Network Error", Toast.LENGTH_SHORT).show();
}
}
}

Whenever your app comes to foreground the onResume() is called and the views are generated again, so that can be the reason for the null values.
You can use onResume() for the same. (For more info check out Activity life cycle)
Also as suggested by others, you can use Picasso or Universal Image Loader or other libraries for ease.
To start with you can refer below links:
https://www.simplifiedcoding.net/picasso-android-tutorial-picasso-image-loader-library/
http://javatechig.com/android/how-to-use-picasso-library-in-android
http://javatechig.com/android/universal-image-loader-library-in-android

load .png from url's in the existing imageview

i seen this, and made how they say.
my app loads and shows .jpg, but don't show .png. He shows empty screen. (tested on versions 4.1 and 4.2)
if (isOnline()) {
new DownloadImageTask((ImageView) findViewById(R.id.imageViewSA))
.execute(img);
} else {
tv_info.setText("Включите интернет для загрузки");
}
}
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}

you can use universal image loader library instead, so easy to integrate in your code, you can display images from URL to imageView like this
imageLoader.displayImage(url, imageView);
here's a good example of using UIL
and the library
good luck ;)

android setting layout background to iamgeview

I have a class that extends AsyncTask to get image from a URL:
public class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
I can load it to every ImageView I want, like that:
new DownloadImageTask(mRecipeImage).execute(ImageURL);
I an getting the image while the app is running (dynamically).
I want to set a Relative Layout's background to the image that I am getting from the web.
any ideas?

Please visit this link:
UniversalImageLoader
may it is help full to you.

It is better if you use an ImageLoader library like picasso, volley for downloading and setting Image.
code snippet for using picasso
Picasso.with(context).load("ur_image_url").into(bmImage);
code snippet for using Volley
String url = "http://i.imgur.com/7spzG.png";
// Retrieves an image specified by the URL, displays it in the UI.
ImageRequest request = new ImageRequest(url,
new Response.Listener() {
#Override
public void onResponse(Bitmap bitmap) {
bmImage.setImageBitmap(bitmap);
}
}, 0, 0, null,
new Response.ErrorListener() {
public void onErrorResponse(VolleyError error) {
bmImage.setImageResource(R.drawable.image_load_error);
}
});
// Access the RequestQueue through your singleton class.
MySingleton.getInstance(this).addToRequestQueue(request);

android:display image in listview

I am trying to display an image in listview from url using JSON parsing. the image url displays correctly in log. when i am trying to download image and display in list getting NullPointerException in bmImage.setImageBitmap(result);
i am using following code can anyone tell me the solution..
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
Bitmap bt_img = null;
try {
FileInputStream in = new FileInputStream(urls[0]);
InputStream in = new java.net.URL(urls[0]).openStream();
bt_img = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return bt_img;
}
protected void onPostExecute(Bitmap result) {
try {
bmImage.setImageBitmap(result);
} catch (Exception e) {
e.printStackTrace();
}
}
}

If you are getting a nullPointerException on the bmImage variable, it means it has not been initialized. As in the code you provide you are not getting its reference, you have to be passing it to the AsyncTask.
What is the code where you pass the bmImage reference, invoking your AsyncTask? The problem seems to be in that code, not in the AsyncTask itself.

1) best way is use Lazy Loding
and
2) second way is try this code,
try {
URL imageURL = new URL(imgUrl);
qrBitmap = BitmapFactory.decodeStream(imageURL.openStream());
image.setImageBitmap(qrBitmap);
} catch (Exception e) {
Log.d("QRDisplay", e.getMessage());
}

You have to use the Universal Image Loader for getting the images from the server.
this link help to u
https://github.com/nostra13/Android-Universal-Image-Loader