Develop Reference

How to insert Exif information to a new image?

I just create an image that comes from the camera on an Android application:
YuvImage yuv = new YuvImage(
byteArrayDataFromCamera,
camera.getParameters().getPreviewFormat(),
imageWidth,
imageHeight, null);
ByteArrayOutputStream out = new ByteArrayOutputStream();
yuv.compressToJpeg(new Rect(0, 0, imageWidth, imageHeight, 100, out);
byte[] bytes = out.toByteArray();
Bitmap image = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
And I want to add Exif information to it. Since now I've tried this:
// Save image on SD
storeImage(image, "Image_0.jpg");
String filePath = Environment.getExternalStorageDirectory() + "/MyFolder/Image_0.jpg";
try {
ExifInterface exif = new ExifInterface(filePath);
exif.setAttribute("UserComment", "my custom comment");
exif.saveAttributes();
}
catch (IOException e) {
e.printStackTrace();
}
The storeImage method:
private boolean storeImage(Bitmap imageData, String filename) {
//get path to external storage (SD card)
String iconsStoragePath = Environment.getExternalStorageDirectory() + "/MyFolder/";
File sdIconStorageDir = new File(iconsStoragePath);
//create storage directories, if they don't exist
sdIconStorageDir.mkdirs();
try {
String filePath = sdIconStorageDir.toString() + filename;
FileOutputStream fileOutputStream = new FileOutputStream(filePath);
BufferedOutputStream bos = new BufferedOutputStream(fileOutputStream);
//choose another format if PNG doesn't suit you
imageData.compress(CompressFormat.PNG, 100, bos);
bos.flush();
bos.close();
} catch (FileNotFoundException e) {
Log.w("TAG", "Error saving image file: " + e.getMessage());
return false;
} catch (IOException e) {
Log.w("TAG", "Error saving image file: " + e.getMessage());
return false;
}
return true;
}
As my image is recently created, it doesn't have any ExifInterface information. I want to know how to add new ExifInterface to my recently created image. How can achieve this?

I know that you can add rotation in image information but to add comment it's more complicated. The Exif class doesn't work correctly... Because you can read Exif information from stream but you can write this information. When I search information to add image info the users have the same problem as you, and I know that existing libraries to add information in image information...
When I find the post I give you the URL!!
I can find the post, read this!!
Tell me if I helped you and good programming!

Black portion in place of transparent portion while saving the bitmap

I am frustrated searching almost every google page for this problem.
I need to save my bitmap to file.
I have used this method several times with no problem at all. But now I am having a problem.
The Bitmap I am saving is a round image with transparency and having .png format which I have placed in res folder. But I am getting black portion in place of transparent portion.
This is the code I am using for saving the bitmap.
void saveImage(Bitmap bmp) {
try {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, bytes);
finalImg = new File(Environment.getExternalStorageDirectory(),
"emoticon_temp" + ".png");
finalImg.createNewFile();
FileOutputStream fo = new FileOutputStream(finalImg);
fo.write(bytes.toByteArray());
fo.flush();
fo.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
I am saving this bitmap as file because I need to share this image and for sharing the image I need the Stream Uri.
If you got any other Idea for sharing a bitmap, please let me know.

saving picture from my app

The idea of my app is to capture image from camera then crop specified area from it.
The problem :
When i save the cropped image in my sd card for the first time to launch the app, it saved properly. but when run my app one more time and take image then crop it. when save it the first image that take and crop at first time appear in the sd card not the current one.
This is my code for save images:
public static void save(Activity activity, Bitmap bm, String name) {
OutputStream outStream = null;
File externalFilesDir = activity.getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File outFile = new File(externalFilesDir, "IDOCR" + File.separator + "Numbers");
if (!outFile.exists())
outFile.mkdirs();
File number = new File(outFile, name + ".PNG");
//if (number.exists())
// number.delete();
try {
//outStream = new FileOutputStream(new File(path));
outStream = new FileOutputStream(number);
bm.compress(Bitmap.CompressFormat.PNG, 100, outStream);
outStream.flush();
outStream.close();
bm.recycle();
System.gc();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

Maybe if you are trying to overwrite the previous version of the file, you should first delete the previous one...
You can add:
if (!outFile.exists())
outFile.mkdirs();
else {
outFile.delete();
outFile.createNewFile();
}

how to format the path to use in uri.parse() for android

I have an image that is in the following location (it's in my android workspace resources),
D:\Android\WorkSpace\myprojectname\res\drawable-hdpi
I have used the following line of code to attach this image to an email but it doesn't seem to be working, it sends the email but it won't have the attachment.
emailIntent.putExtra(android.content.Intent.EXTRA_STREAM,Uri.parse("android.resource://com.mywebsite.myprojectname/" + R.drawable.image));
this this wrong?

Resources res = this.getResources();
Bitmap bm = BitmapFactory.decodeResource(res, R.drawable.image);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
File f = new File(Environment.getExternalStorageDirectory(), "image.jpg");
try {
f.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//write the bytes in file
FileOutputStream fo = null;
try {
fo = new FileOutputStream(f);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
fo.write(bytes.toByteArray());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Uri uri = Uri.fromFile(f);
After that,
Where u r sending the email, do the following,
intent.putExtra(Intent.EXTRA_STREAM, uri);
It will work for sure. it worked for completely. Try it.

Well, the first problem is that even if that URI format is right (which I doubt), that file would be inside your application's sandbox, which is not accessible to the E-mail activity (or any other activity, for that matter). In any case, you're gonna have to write that file into the SD card and have the email program read it from there. You can output the bitmap using the following code:
Bitmap image = BitmapFactory.decodeResource(getResources(),R.drawable.image);
File file = new File(Environment.getExternalStorageDirectory(), "forEmail.PNG");
OutputStream outStream = new FileOutputStream(file);
image.compress(Bitmap.CompressFormat.PNG, 100, outStream);
outStream.flush();
outStream.close();
Then use Uri.fromFile() to generate the URI from the file defined above:
emailIntent.putExtra(android.content.Intent.EXTRA_STREAM, Uri.fromFile(file));
(Code for resource to file adapted from here)

The other answers might work too (they didn't work for me though)! I got it running using only the one line of code bellow, which is very simple and easy. Thanks everyone.
emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("android.resource://" + getPackageName() + "/" + R.drawable.image));
I think my issue was that I was putting the package name wrong, but using the getPackageName() method that issue is solved!

Store Bitmap image to SD Card in Android

I am facing some strange problem with my android code,
I have an image in Bitmap variable and want to save that file to SD card.
I code as follow,
Bitmap IMAGE // Loaded from internet servers.;
try {
File _sdCard = Environment.getExternalStorageDirectory();
File _picDir = new File(_sdCard, "MyDirectory");
_picDir.mkdirs();
File _picFile = new File(_picDir, "MyImage.jpg");
FileOutputStream _fos = new FileOutputStream(_picFile);
IMAGE.compress(Bitmap.CompressFormat.JPEG, 100, _fos);
_fos.flush();
_fos.close();
Toast.makeText(this, "Image Downloaded", 7000).show();
} catch (Exception ex) {
ex.printStackTrace();
Toast.makeText(this, ex.getMessage(), 7000).show();
}
I am using Sony Experia Arc as my testing device, when the phone is connected to my computer, the code works nice, it stores image and also displays in gallery. But when I disconnect phone from my computer and test the app, it doesn't save picture and doesn't show any exception.

use this function
void saveImage() {
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/saved_images");
String fname = "Image.jpg";
File file = new File (myDir, fname);
if (file.exists ()) file.delete ();
try {
FileOutputStream out = new FileOutputStream(file);
myBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
Check this answer will give more details Android saving file to external storage

ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
//4
File file = new File(Environment.getExternalStorageDirectory()+File.separator + "image.jpg");
try {
file.createNewFile();
FileOutputStream fo = new FileOutputStream(file);
//5
fo.write(bytes.toByteArray());
fo.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

**This Code Cover the Following Topics**
1. Save a bitmap Image on sdcard a jpeg
2. Create a folder on sdcard
3. Create every file Separate name
4. Every file save with date and time
5. Resize the image in very small size
6. Best thing image Quality fine not effected from Resizing
The following method is used to create an image file using the bitmap
public void createImageFromBitmap(Bitmap bmp) {
FileOutputStream fileOutputStream = null;
try {
// create a File object for the parent directory
File wallpaperDirectory = new File("/sdcard/Capture/");
// have the object build the directory structure, if needed.
wallpaperDirectory.mkdirs();
//Capture is folder name and file name with date and time
fileOutputStream = new FileOutputStream(String.format(
"/sdcard/Capture/%d.jpg",
System.currentTimeMillis()));
// Here we Resize the Image ...
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100,
byteArrayOutputStream); // bm is the bitmap object
byte[] bsResized = byteArrayOutputStream.toByteArray();
fileOutputStream.write(bsResized);
fileOutputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
}
and add this in manifest
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />