I am trying to save a bitmap which user selects into my own App path.
Unfortunately, with very big images I get OutOfMemoryError error.
I am using the following code:
private String loadImage (Uri filePath) {
File fOut = new File(getFilesDir(),"own.jpg");
inStream = getContentResolver().openInputStream(filePath);
selectedImage = BitmapFactory.decodeStream(inStream);
selectedImage.compress(CompressFormat.JPEG, 100, new FileOutputStream(fOut));
}
Is there any way for me to save any image file of any size for an Uri to a file?
*I am not in a position to resize the image e.g. by using calculateInSampleSize method.
Is there any way for me to save any image file of any size for an Uri to a file?
Since it already is an image, just copy the bytes from the InputStream to the OutputStream:
private void copyInputStreamToFile( InputStream in, File file ) {
try {
FileOutputStream out = new FileOutputStream(file);
byte[] buf = new byte[8192];
int len;
while((len=in.read(buf))>0){
out.write(buf,0,len);
}
out.flush();
out.getFD().sync();
out.close();
in.close();
} catch (Exception e) {
e.printStackTrace();
}
}
(adapted from this SO answer)
Related
I am trying to creating pdfs from images in my Android application.
I get the image successfully and created the pdf file successfully. But When I open my pdf file, images are not displayed. I have tried many solutions on Internet but all in vain.
I am pasting my code. Kindly guide me.
First I am pasting the code for getting image from gallery
Intent myIntent = new Intent(Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(myIntent,120);
Now I am pasting the code of OnActivityResult Method, in which I am getting the image and craeating a pdf file.
try {
Document doc = new Document();
if (resultCode == RESULT_OK) {
if (requestCode == 120) {
if (data.getData() != null) {
Uri uri = data.getData();
Image image = Image.getInstance(uri.toString());
FileOutputStream fileOutputStream =openFileOutput("mypdf.pdf", Context.MODE_PRIVATE);
PdfWriter.getInstance(doc, fileOutputStream);
doc.open();
doc.add(image);
doc.close();
}
}
}
} catch (IOException | DocumentException e) {
e.printStackTrace();
}
As you are using iText you need to create BitMap format of image and then need to add into pdf.
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Bitmap bitmap = MediaStore.Images.Media.getBitmap(contentResolver, <pass the uri of image>);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100 , stream);
Image myImg = Image.getInstance(stream.toByteArray());
myImg.setAbsolutePosition(470f,755f);
myImg.scaleToFit(100f,100f);
document.add(myImg);
I have solved it, The solution was to use Input Stream as follows:
Uri uri = data.getData();
InputStream ims = getContentResolver().openInputStream(uri);
Bitmap bitmap = BitmapFactory.decodeStream(ims);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
Image image = Image.getInstance(byteArray);
doc.add(image);
doc.close();
I've got an Image Uri, retrieved using the following:
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
This works just amazing for Intents that require an Image URI, etc (so I know for sure the URI is valid).
But now I want to save this Image URI to a file on the SDCARD. This is more difficult because the URI does not really point at a file on the SDCARD or the app.
Will I have to create a bitmap from the URI first, and then save the Bitmap on the SDCARD or is there a quicker way (preferable one that does not require the conversion to a bitmap first).
(I've had a look at this answer, but it returns file not found - https://stackoverflow.com/a/13133974/1683141)
The problem is that the Uri you've been given by Images.Media.insertImage() isn't to an image file, per se. It is to a database entry in the Gallery. So what you need to do is read the data from that Uri and write it out to a new file in the external storage using this answer https://stackoverflow.com/a/8664605/772095
This doesn't require creating a Bitmap, just duplicating the data linked to the Uri into a new file.
You can get the data using an InputStream using code like:
InputStream in = getContentResolver().openInputStream(imgUri);
Update
This is completely untested code, but you should be able to do something like this:
Uri imgUri = getImageUri(this, bitmap); // I'll assume this is a Context and bitmap is a Bitmap
final int chunkSize = 1024; // We'll read in one kB at a time
byte[] imageData = new byte[chunkSize];
try {
InputStream in = getContentResolver().openInputStream(imgUri);
OutputStream out = new FileOutputStream(file); // I'm assuming you already have the File object for where you're writing to
int bytesRead;
while ((bytesRead = in.read(imageData)) > 0) {
out.write(Arrays.copyOfRange(imageData, 0, Math.max(0, bytesRead)));
}
} catch (Exception ex) {
Log.e("Something went wrong.", ex);
} finally {
in.close();
out.close();
}
I am working on an application where I am getting an image from the web server.
I need to save that image in a sqlite database. Maybe it will be saved in a byte[]; I have done this way, taking the datatype as blob, and then retrieving the image from db and showing at imageview.
I am stuck somewhere, however: I am getting null when I decodefrom bytearray
The code I have used is:
InputStream is = null;
try {
URL url = null;
url = new URL(http://....);
URLConnection ucon = null;
ucon = url.openConnection();
is = ucon.getInputStream();
} catch (MalformedURLException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayBuffer barb = new ByteArrayBuffer(128);
int current = 0;
try {
while ((current = bis.read()) != -1) {
barb.append((byte) current);
} catch (IOException e) {
e.printStackTrace();
}
byte[] imageData = barb.toByteArray();
Then I have inserted imageData in to the db..
To retrieve the image:
byte[] logo = c.getBlob(c.getColumnIndex("Logo_Image"));
Bitmap bitmap = BitmapFactory.decodeByteArray(logo, 0, logo.length);
img.setImageBitmap(bitmap);
But I am getting the error:
Bitmap bitmap is getting null.
Sometimes, It happens, when your byte[] not decode properly after retrieving from database as blob type.
So, You can do like this way, Encode - Decode,
Encode the image before writing to the database:
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
mBitmap.compress(Bitmap.CompressFormat.JPEG, THUMB_QUALITY, outputStream);
mByteArray = outputStream.toByteArray(); // write this to database as blob
And then decode it like the from Cursor:
ByteArrayInputStream inputStream = new ByteArrayInputStream(cursor.getBlob(columnIndex));
Bitmap mBitmap = BitmapFactory.decodeStream(inputStream);
Also, If this not work in your case, then I suggest you to go on feasible way..
Make a directory on external / internal storage for your application
images.
Now store images on that directory.
And store the path of those image files in your database. So you
don't have a problem on encoding-decoding of images.
Official facebook App has a bug, when you try to share an image with share intent, the image gets deleted from the sdcard. This is the way you have to pass the image to facebook app using the uri of the image:
File myFile= new File(Environment.getExternalStorageDirectory(), "car.jpg");
Uri uri = Uri.fromFile(myFile);
i.putExtra(Intent.EXTRA_STREAM, uri);
Then, suppose that if i create a copy from the original myFile object, and i pass the uri of the copy to facebook app, then, my original image will not be deleted.
I tried with this code, but it doesn't work, the original image file is still getting deleted:
File myFile= new File(Environment.getExternalStorageDirectory(), "car.jpg");
File auxFile=myFile.getAbsoluteFile();
Uri uri = Uri.fromFile(auxFile);
Can someone tell me how to do a exact copy of a file that doesn't redirect to the original File?
Please check: Android file copy
The file is copied byte by byte so no reference to the old file is maintained.
Here, this should be able to create a copy of your file:
private void CopyFile() {
InputStream in = null;
OutputStream out = null;
try {
in = new FileInputStream(<file path>);
out = new FileOutputStream(<output path>);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch(Exception e) {
Log.e("tag", e.getMessage());
}
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while((read = in.read(buffer)) != -1){
out.write(buffer, 0, read);
}
}
I've got the URL of a .png image, that needs to be downloaded and set as a source of an ImageView. I'm a beginner so far, so there are a few things I don't understand:
1) Where do I store the file?
2) How do I set it to the ImageView in java code?
3) How to correctly override the AsyncTask methods?
Thanks in advance, will highly appreciate any kind of help.
I'm not sure you can explicity build a png from a download. However, here is what I use to download images and display them into Imageviews :
First, you download the image :
protected static byte[] imageByter(Context ctx, String strurl) {
try {
URL url = new URL(urlContactIcon + strurl);
InputStream is = (InputStream) url.getContent();
byte[] buffer = new byte[8192];
int bytesRead;
ByteArrayOutputStream output = new ByteArrayOutputStream();
while ((bytesRead = is.read(buffer)) != -1) {
output.write(buffer, 0, bytesRead);
}
return output.toByteArray();
} catch (MalformedURLException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
And then, create a BitMap and associate it to the Imageview :
bytes = imagebyter(this, mUrl);
bm = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
yourImageview.setImageBitmap(bm);
And that's it.
EDIT
Actually, you can save the file by doing this :
File file = new File(fileName);
FileOutputStream fos = new FileOutputStream(file);
fos.write(imagebyter(this, mUrl));
fos.close();
You can explicity build a png from a download.
bm.compress(Bitmap.CompressFormat.PNG, 100, out);
100 is your compression (PNG's are generally lossless so 100%)
out is your FileOutputStream to the file you want to save the png to.