Develop Reference

Android saves image twice

I'm making a screenshot of my few programmatically but somehow the image is saved in the /TestProject/ folder but also in the normal picture folder. Does anyone have a clue why this is happening. (And is there a change that Android's normal picture folder shows all images all together?)
OutputStream out;
root.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(root.getDrawingCache());
root.setDrawingCacheEnabled(false);
/* Preparation ==================================== */
// Find the SD Card path
File path = Environment.getExternalStorageDirectory();
// Create a new folder in SD Card
File dir = new File(path.getAbsolutePath() + "/TestProject/");
dir.mkdirs();
/* ================================================= */
// Create a name for the saved image
File file = new File(dir, (new Date().getTime() + ".jpg"));
try {
out = new FileOutputStream(file);
// Compress into png format image from 0% - 100%
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, (new Date().getTime() + ".jpg"), null);
Toast.makeText(this, "Farm art saved", Toast.LENGTH_LONG).show();
} catch (Exception e) {
e.printStackTrace();
}

The insertImage() method also creates a thumbnail for the inserted image. There is a probability that you're seeing the thumbnail and the inserted image.
If you want to force a scan of the image by the media store, you should use the scanFile()[0] method instead.
[0] http://developer.android.com/reference/android/media/MediaScannerConnection.html#scanFile%28java.lang.String,%20java.lang.String%29

Android picture has red tint after decoding and pulling the .png file from the emulator to pc

I am transferring some data from a server ( java app ) to client ( android app ).
The data gets Base64 encoded, sent, received correct, decoded ( correct ? ) and stored to the device ( correct ? )
I am using android studio and an AVD to simulate it. I take the pictures via DDMS from the virtual device folder to my computers harddisk in order to take a look at them. Is maybe there the problem?
now in the following code sections the picture files get decoded and stored to the device.
Cant figure out where the mistake is.
Would be glad about any hint.
byte[] imageBackToByt = Base64.decode(parts[9], Base64.DEFAULT);
Bitmap bitmapImage = BitmapFactory.decodeByteArray(imageBackToByt, 0, imageBackToByt.length);
File mediaStorageDir = new File(Environment.getExternalStorageDirectory()
+ "/Android/data/"
+ ctx.getApplicationContext().getPackageName()
+ "/Files");
File imageFile = new File(mediaStorageDir.getPath() + File.separator + voReceived.name + ".png");
try {
FileOutputStream fos = new FileOutputStream(imageFile);
bitmapImage.compress(Bitmap.CompressFormat.PNG, 90, fos);
fos.close();
} catch (FileNotFoundException e) {
Log.d(ctx.getString(R.string.SLDMP), "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d(ctx.getString(R.string.SLDMP), "Error accessing file: " + e.getMessage());
}
This is how i encode it on the server in JAVA:
BufferedImage originalPicture = null;
ByteArrayOutputStream byteArrayOS = new ByteArrayOutputStream();
byte[] pictureInByte = null;
String pictureEncoded = null;
try {
// load the original picture from the filepath
originalPicture = ImageIO.read(picturFile);
// Convert the original picture from .png format to byte array (byte []) format
ImageIO.write(originalPicture, "jpg", byteArrayOS );
pictureInByte = byteArrayOS.toByteArray();
// Encode the byte array pictureInByte to String based on Base64 encoding
pictureEncoded = Base64.getEncoder().encodeToString(pictureInByte);
} catch (IOException e) {
e.printStackTrace();
// If picture failed to load / encode store string "PICTUREERROR" as an error code
pictureEncoded = "PICTUREERROR";
}

The server puts the bytes of the image file in a buffer and sends the contents of the base 64 encoded buffer to the client. Now on client side you should directly decode base 64 all bytes and write all the resulting bytes to file. In this way you have exactly the same file. All bytes are the same and file size would be equal too.
Instead you use BitmapFactory to construct a Bitmap and then compress it to PNG. That all makes no sense.
If you want to transfer a file then do not use BitmapFactory and Bitmap.
Having said that.. Mmmmm nice filter! The result is wonderfull!

how to get image type from imageview (android)

i am working on an wallpaper app in which i am receiving images from internet in GridView and Full Screen ImageView.
i want to save ImageView loaded image using its real image type, but i don't know how to get image type from ImageView.
example: if loaded image is JPEG or PNG then how do i get image type.
this is my code that i am using to save image as JPEG:
int intHeight = fullImageView.getHeight();
int intWidth = fullImageView.getWidth();
String dirname2 = "/Wallpapers HD/";
File myDir2 = new File(Environment.getExternalStorageDirectory()
.getPath() + dirname2);
myDir2.mkdirs();
String fname2 = "image" + intHeight + intWidth + ".jpeg";
File file2 = new File(myDir2, fname2);
if (file2.exists())
file2.delete();
try {
FileOutputStream out = new FileOutputStream(file2);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
} catch (Exception e) {
Toast.makeText(_context, "failed", Toast.LENGTH_SHORT).show();
}

Perhaps you should keep track of this yourself. In the code you use to set the ImageView's drawable, you could apply a tag to the view to store that data:
String[] parts = fileName.split(".");
String extension = parts[parts.length-1];
imageView.setTag(extension);
And retrieve it from the view later:
String ext = (String) fullImageView.getTag();

saving bitmap from arraylist to SD card - saved file unreadable

My situation is as follows: I'm saving multiple bitmaps from an arraylist to a specific folder in my devices SD Card (with success), however, the saved file- when clicked- prompts a message from the phone, stating: "Unable to find application to perform this action." The file size of this file is proportional to that of the bitmap image being saved, so I'm a bit confused, as the device has no problems opening image files, yet cannot open (or identifiy) these as a media file.
Question: What would cause the saved image file (presuming that I have saved it correctly) to exhibit this type of behavior in a device, and how should I resolve this issue?
Extra: the thumbnail of the file is the system provided thumbnail of the two papers on top of each other. The arraylist is being passed from one activity to its current one where the method provided is supplied.
Here is the method invoking the saving of the files to the specified folder /filesdestination:
private void saveImages(){
// to retrieve bitmaps
ArrayList<Bitmap> images = getIntent().getParcelableArrayListExtra("images key");
//to retrieve bitmaps and save in specific order, while also naming them in that order
int loopVal = 0;
int postVal = 9;
while ( loopVal < 9) {
Bitmap Image = images.get(loopVal);
try {
String filedestination = new String(Environment.getExternalStorageDirectory() + "/filedestination");
String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmm").format(new Date());
File file = new File(filedestination, postVal + ".post_order" + ".jpg" + timeStamp);
File picfile = file;
FileOutputStream fos = new FileOutputStream(picfile);
Image.compress(Bitmap.CompressFormat.PNG, 100, fos);
fos.close();
} catch (Throwable e) {
e.printStackTrace();
}
postVal--;
loopVal++;
}
}
Any insight would be appreciated,
-Lucas

i think it cannot read the file type because the timestamp is after the file extension jpg and you are also compressing it as a png, so you might want to change either or, something like this
File file = new File(filedestination, postVal + timeStamp +".post_order" + ".png");

It seems that you are saving a .jpg file compressed as a PNG. That can make the image reader app to misbehave.
Either change Image.compress(Bitmap.CompressFormat.PNG, 100, fos);
to
Image.compress(Bitmap.CompressFormat.JPEG, 100, fos);
or change
File file = new File(filedestination, postVal + ".post_order" + ".jpg" + timeStamp);
to
File file = new File(filedestination, postVal + ".post_order" + ".png" + timeStamp);

VuDroid pdf viewer cannot find Bitmap to render or it doesnt render

I am trying to use the VuDroid PDF viewer and I need to take the rendered bitmap and store it as a byte[]. Then I need to convert it back into a Bitmap that can be displayed on a view using something like "canvas.drawBitmap(bitmap, 0, 0, paint);".
I have spent many hours trying to access the Bitmap and I might have done it already, but even if I get the byte[] to return something it still wont render as a Bitmap on the canvas.
Could someone please help me here, I must be missing something. Thank you so much.
I believe it is supposed to accessed via...
PDFPage.java .... public Bitmap renderBitmap(int width, int height, RectF pageSliceBounds)
-or-
through Page.java -or- DocumentView.java -or- DecodeService.java
Like I said I have tried all of these and have gotten results I just cannot see where I am going wrong since I cannot render it to see if the Bitmap was called correctly.
Thank you again :)

The doc says the method returns "null if the image could not be decode." You can try:
byte[] image = services.getImageBuffer(1024, 600);
InputStream is = new ByteArrayInputStream(image);
Bitmap bmp = BitmapFactory.decodeStream(is);
I think This will help you:-
Render a byte[] as Bitmap in Android
How does Bitmap.Save(Stream, ImageFormat) format the data?
Copy image with alpha channel to clipboard with custom background color?

if you want to get each pdf page as independent bitmap you should consider that
VuDroid render the pages,
PDFView only display them.
you should use VuDroid functions.
now you can use this example and create your own codes
Example code : for make bitmap from a specific PDF page
view = (ImageView)findViewById(R.id.imageView1);
pdf_conext = new PdfContext();
PdfDocument d = pdf_conext.openDocument(Environment.getExternalStorageDirectory() + "your PDF path");
PdfPage vuPage = d.getPage(1); // choose your page number
RectF rf = new RectF();
rf.bottom = rf.right = (float)1.0;
Bitmap bitmap = vuPage.renderBitmap(60, 60, rf); //define width and height of bitmap
view.setImageBitmap(bitmap);
for writing this bitmap on SDCARD :
try {
File mediaImage = new File(Environment.getExternalStorageDirectory().toString() + "your path for save thumbnail images ");
FileOutputStream out = new FileOutputStream(mediaImage);
bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
for retrieve saved image:
File file = new File(Environment.getExternalStorageDirectory().toString()+ "your path for save thumbnail images ");
String path = file.getAbsolutePath();
if (path != null){
view = Bitmap.createScaledBitmap(BitmapFactory.decodeFile(path), YOUR_X, YOUR_Y, false);
}

Try this code to check whether bitmap is properly generating or not
PdfContext pdf_conext = new PdfContext();
PdfDocument d = (PdfDocument) pdf_conext.openDocument(pdfPath);
PdfPage vuPage = (PdfPage) d.getPage(0);
RectF rf = new RectF();
Bitmap bitmap = vuPage.renderBitmap(1000,600, rf);
File dir1 = new File (root.getAbsolutePath() + "/IMAGES");
dir1.mkdirs();
String fname = "Image-"+ 2 +".jpg";
File file = new File (dir1, fname);
if (file.exists ())
file.delete ();
try {
FileOutputStream out = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}