Develop Reference

Android. Can't decode Bitmap from stream

I have URL to PNG image file.
I want to get this image file and set it as a source for an ImageView.
My code:
URL iconURL = null;
try {
iconURL = new URL("https://maps.gstatic.com/mapfiles/place_api/icons/worship_general-71.png");
} catch (MalformedURLException e) {
e.printStackTrace();
}
Bitmap icon = null;
try {
icon = BitmapFactory.decodeStream(iconURL.openConnection().getInputStream());
} catch (IOException e) {
e.printStackTrace();
}
myImageView.setImageBitmap(icon);
If I place a breakpoint into the line with decodeStream() the app stops and I see the following:
If I run the app in regular mode, it just stops!
Can someone explain what is wrong here and how to do it correctly?
Thanks.

If you just want to show the image on your ImageView then you can use Picasso Library.
Put below dependency in build.gradle file
'com.squareup.picasso:picasso:2.71828'
And use below java code for loading your image from URL to your ImageView
Picasso.get()
.load(url)
.into(imageView);

set image from server as wallpaper with full size

i'm using these codes to set my image from server as wallpaper :
WallpaperManager wpm = WallpaperManager.getInstance(MainActivity.this);
InputStream ins;
try {
String xlx = "http://myserver.com/myimage.jpg";
ins = new URL(xlx).openStream();
wpm.setStream(ins);
} catch (IOException e) {
e.printStackTrace();
}
it's working and my image will set as wallpaper,
but my problem is that it is not setting full image as wallpaper, so how should i do to set full image as wallpaper without cropping?

set imageview property in your layout xml file.
android:scaleType="fitXY"

ESelect and display png from custom folder

I've created a folder 'test' inside res and I want to display them in an image view. How exactly can I fetch the image with a given name in the designated folder?
ImageView test = (ImageView) testing.findViewById(R.id.test);
flag.setImageDrawable(getResources().); <==== This?
EDIT
InputStream is = null;
try {
is = this.getResources().getAssets().open("country_flags/sample.png");
} catch (IOException e) {
;
}
image = (ImageDrawable) BitmapFactory.decodeStream(is);
try {
flag.setImageDrawable(getResources().getAssets().open("country_flags/"+nationality+".png"));
} catch (IOException e) {
e.printStackTrace();
}

How exactly can I fetch the image with a given name in the designated folder?
You don't. You cannot invent new resource types, and so your test directory will, at best, be forever ignored.

OutOfMemoryError with emodo/cropper library when using getCroppedImage

I am using edmodo/cropper library to crop the image after the user has taken the image from camera.
Link: https://github.com/edmodo/cropper/wiki
I got this issue on device GT-N7000 and some other android phones.
java.lang.OutOfMemoryError
1 at android.graphics.Bitmap.nativeCreate(Native Method)
2 at android.graphics.Bitmap.createBitmap(Bitmap.java:669)
3 at android.graphics.Bitmap.createBitmap(Bitmap.java:604)
4 at android.graphics.Bitmap.createBitmap(Bitmap.java:530)
5 at com.edmodo.cropper.CropImageView.getCroppedImage(CropImageView.java:357)
Does anyone know how to solve this issue. Please help me ,the device keep getting crashes.

I solved it by subsampling the captured image before storing it in cropView using BitmapFactory.Options.
Here is the code:
// setting path to the clicked image and cropped image
path_click = "sdcard/Pictures/Candice/Clicked.jpg";
path_crop = "sdcard/Pictures/Candice/Cropped.jpg";
final BitmapFactory.Options options = new BitmapFactory.Options();
//If set to a value > 1,requests the decoder to subsample the
//original image, returning a smaller image to save memory.
options.inSampleSize = 2;
clickedImage = BitmapFactory.decodeFile(path_click, options);
cropImageView.setImageBitmap(clickedImage);
// Sets initial aspect ratio to 10/10, for demonstration purposes
cropImageView.setAspectRatio(DEFAULT_ASPECT_RATIO_VALUES,
DEFAULT_ASPECT_RATIO_VALUES);
cropButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Here we save the cropped image and then call the next
// activity
// To retrieve the image contained within the Cropper window,
// use the provided method, getCroppedImage() to retrieve a
// Bitmap of the cropped image.
croppedImageBitmap = cropImageView.getCroppedImage();
/** Save cropped image to SD card using output streams **/
// An output stream that writes bytes to a file.
// If it does not exist, a new file will be created.
FileOutputStream out = null;
try {
out = new FileOutputStream(path_crop);
// Writing a compressed version of bitmap to outputstream.
croppedImageBitmap.compress(Bitmap.CompressFormat.JPEG, 90,
out);
// Just after compression,add
croppedImageBitmap.recycle();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (out != null) {
out.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
startActivity(chooseIntent);
}
});

I don't know how big is your image, but have you tried adding android:largeHeap="true" to your <application> tag in the AndroidManifest.xml?

How can I set an image from a file path?

I'm saving an image from the device's camera to a directory on the SD card (ex: /sdcard/appName/image.jpg), then I save the path into a database. My problem is that I can't seem to load the images into a ListView with a cursor adapter.
I tried the following code, where helper.getImg(); is a method from my database helper that returns a String (the file path), but it is not working.
icon=(ImageView)row.findViewById(R.id.icon_pura);
String imgPath=helper.getImg(c);
Bitmap myBitmap=BitmapFactory.decodeFile(imgPath);
icon.setImageBitmap(myBitmap);

the answer has to do with URIs, and you need to use the externalstorage() function. Using set paths won't work on every device
anyway you store path into the URI which is more flexible for retrieving and parsings items at that path

String filepath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/Directory name/";
File file = new File(filepath,imagename);
FileInputStream fs = null;
try
{
fs = new FileInputStream(file);
}
catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
BitmapFactory.Options bfOptions = new BitmapFactory.Options();
/*
* bfOptions.inDither=false; //Disable Dithering mode
* bfOptions.inPurgeable=true; //Tell to gc that whether it needs
* free memory, the Bitmap can be cleared
* bfOptions.inInputShareable=true;*/
bfOptions.inJustDecodeBounds = false;
bfOptions.inTempStorage = new byte[32 * 1024];
try {
Bitmap originalImage = BitmapFactory.decodeFileDescriptor(fs.getFD(), null,bfOptions);
icon.setImageBitmap(originalImage);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

If you follow himanshu's (correct) advice, make sure that if you're going to allow the user the option of loading and re-loading the image, make sure to manually icon.setImageBitmap(null); between loads, because otherwise Android will leak that memory and you'll crash your app. It's not 100% consistant, and has something to do with the sizes of the images you're loading, but I just found this leak a few days ago and am 100% certain that it's there.