Exception occurred while converting byte [] array to String in android
float rotation =getRotatedImage(imgdata);
// Where imgdata is the string required by the getRotatedImage (imgdata) method.
// My own way to get the image routine
private float getRotatedImage(String imgdata2) {
try {
ExifInterface exif = new ExifInterface(imgdata2);
int rotation = (int)exifOrientationToDegrees(
exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL));
return rotation;
} catch (IOException e) {
Log.e("CAMERA IMAGE", "Error checking exif", e);
// TODO Auto-generated catch block
e.printStackTrace();
}
// TODO Auto-generated method stub
return 0f;
}
// internally in the picture I convert byte data to string
@Override
public void onPictureTaken(byte[] arg0, Camera arg1) {
Log.i("CAMERA", "ON PICTURE TAKEN");
int length = arg0.length;
if (length != 0) {
//bitimage = BitmapFactory.decodeByteArray(arg0, 0, arg0.length);
finalimage = arg0;
if(finalimage!=null)
{
imgdata=converttostring(finalimage);
}
//compressimageforshow();
Toast.makeText(getApplicationContext(), "IMAGE PROCESSING DONE", 0)
.show();
} else {
Toast.makeText(getApplicationContext(), "NO IMAGE ", 0).show();
}
arg1.startPreview();
//shutterButton.setEnabled(false);
show_image_bt.setEnabled(true);
}
// Here's my method to convert to string
private String converttostring(byte[] finalimage2) {
// String basestr=Base64.encodeToString(finalimage2, Base64.NO_WRAP);
return new String(finalimage2);
}
// Here's my details about the logcat exception:
01-22 18:06:48.808: I/ACTIVITY(344): ON CREATE
01-22 18:06:48.808: I/ACTIVITY(344): ON RESUME
01-22 18:06:49.348: I/CAMERA(344): ON SURFACE CHANGE
01-22 18:06:53.018: I/CAMERA(344): ON PICTURE TAKEN
01-22 18:06:56.188: E/(344): can't open ' JFIF ` ` fExif II* > F ( 1 N ` ` Paint.NET v3.36 C
01-22 18:06:56.188: E/(344):
01-22 18:06:56.188: E/(344):
01-22 18:06:56.188: E/(344):
C
@"
01-22 18:06:56.188: E/(344): } !1AQa"q2 #B R $3br
01-22 18:06:56.188: E/(344): %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz
01-22 18:06:56.188: E/(344): w !1AQaq"2 B #3R br
01-22 18:06:56.188: E/(344): $4 % &'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz
// so please someone tell me what to do, also tried Base64 of android class
imgdata=Base64.encodeToString(finalimage,Base64.NO_WRAP);
where imgdata is a string, finalimage is an array of bytes.
Waiting for an answer. Please forgive me for my language and coding style.
// Here I mention the button click event for which an exception is thrown
@Override
public void onClick(View arg0) {
switch (arg0.getId()) {
case R.id.show_image:
show_image_imgvw.setVisibility(View.VISIBLE);
retake_photo_bt.setEnabled(true);
show_image_bt.setEnabled(false);
preview.setVisibility(View.INVISIBLE);
if (finalimage != null) {
resizeimageforshow();
show_image_imgvw.setImageBitmap(bitimage);
Toast.makeText(getApplicationContext(), "IMAGE DISPLAYED", 0)
.show();
an exception is thrown when this button is clicked. // inside resizeimagefroshow () calls getRotatedimage (), after which a new bitmap image is created to display
// code here:
private void resizeimageforshow() {
if (finalimage != null) {
// bitimage=BitmapFactory.decodeByteArray(finalimage, 0,
// finalimage.length);
// show_image_imgvw.setImageBitmap(bitimage);
Bitmap myimage1 = BitmapFactory.decodeByteArray(finalimage, 0,
finalimage.length);
// imgdata=Base64.encodeToString(finalimage,Base64.NO_WRAP);
android.graphics.Matrix matrix = new android.graphics.Matrix();
float rotation = getRotatedImage(imgdata);
if (rotation != 0f) {
matrix.preRotate(rotation);
}
bitimage = Bitmap.createBitmap(myimage1, 0, 0, myimage1.getWidth(),
myimage1.getHeight(), matrix, true);
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As @ njzk2 mentioned, you are converting binary image data to string, it doesn't make any sense. What you want is a filename string that is passed to the constructor ExifInterface
.
So first you have to save the image data to a file:
File file = new File(getExternalCacheDir(), "camera_picture.jpg");
OutputStream os = new FileOutputStream(file.toString());
try {
os.write(finalimage);
} finally {
os.close();
}
Then you can use ExifInterface
with filename
.
If you want to read the metadata directly from the stream, you will have to use a third party library. See reading EXIF jpeg EXIF metadata from image callback .
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