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Grayscaling doesn't affect my image

I am using tessaract to scan text and convert it into a string , so far so good , but i have a problem with grayscaling an image. I have images captured with my camera and I want to grayscale them and to rescale them in order to save some memory , i did this by using the BitmapFactory.Options and the method inSimpleSize(put it in 4).
After that i've tried to get the image from the folder that it is and grayscale it. But didn't work - the text can't be extracted from the photo. However when i removed grayscaling worked.
Here is my code :
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 4;
Bitmap bitmap = BitmapFactory.decodeFile(imgUri.getPath() , options);
// bitmap = toGrayscale(bitmap);
result = extractText(bitmap);
textView.setText(result);
The extractText method simply calls Tessaract and scan the image and it's working fine without the grayscaling.
My toGrayscale code which i found online ( it is working , i have tried it as a filter and i was happy with it) :
public Bitmap toGrayscale(Bitmap bmpOriginal)
{
int width, height;
height = bmpOriginal.getHeight();
width = bmpOriginal.getWidth();
Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
Canvas c = new Canvas(bmpGrayscale);
Paint paint = new Paint();
ColorMatrix cm = new ColorMatrix();
cm.setSaturation(0);
ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
paint.setColorFilter(f);
c.drawBitmap(bmpOriginal, 0, 0, paint);
return bmpGrayscale;
}
Here is my code for capturing photos with the camera :
if (captureImg != null) {
captureImg.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startCameraActivity();
}
});
private void startCameraActivity() {
try {
String IMGS_PATH = Environment.getExternalStorageDirectory().toString() + "/Noetic/imgs";
prepareDirectory(IMGS_PATH);
String img_path = IMGS_PATH + "/ocr.jpg";
outputFileUri = Uri.fromFile(new File(img_path));
final Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, PHOTO_REQUEST_CODE);
}
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
}
I was looking for a solution but didn't find anything. I have some theories why this doesn't work - one of them is because my grayscaling method creates the same image but new (so BitmapFactory.Options.getSampleSize becomes useless). Any help will be much appriciated.
Thanks in advance!

Try to use Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); instead of Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);

Android: how to create a BitmapDrawable from a file in the file system?

So I'm trying to restore an image from a file in my app's private files directory.
InputStream inputStream;
BitMapDrawable result;
try {
inputStream = new FileInputStream(file.getAbsolutePath());
result = BitmapDrawable.createFromStream(inputStream, null);
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
return result;
But obviously I'm doing something wrong because result is always null.

new BitmapDrawable( BitmapFactory.decodeFile(file.getAbsolutePath()) );

Isn't It what you want?
Bitmap bitmap = BitmapFactory.decodeFile(file.getAbsolutePath());
Drawable d = new BitmapDrawable(getResources(),bitmap);
imageview.setImageDrawable(d);

Setting image using Imagepath does not work

Trying to set images to image view using the image paths.
My image path
String img_path ="/storage/sdcard0/Fbt/xylo.jpg";
image path code
private String getRealPathFromURI(Uri contentURI) {
Cursor cursor = getContentResolver().query(contentURI, null, null, null, null);
if (cursor == null) { // Source is Dropbox or other similar local file path
return contentURI.getPath();
} else {
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.Media.DATA);
return cursor.getString(idx);
}
}
selectedImage = imageReturnedIntent.getData();
File imageFile = new File(getRealPathFromURI(selectedImage));
String path= imageFile.toString();
output =/storage/sdcard0/Fbt/xylo.jpg
I tried all possible code still there is no success
ImageView carpict =(ImageView)findViewById(R.id.img);
Bitmap bitmap = BitmapFactory.decodeFile(img_path);
carpict.setImageBitmap(bitmap);
2.
Uri image22 =(Uri.parse(Environment.getExternalStorageDirectory().getAbsolutePath()+img_path));
InputStream imageStream = null;
try {
imageStream = getContentResolver().openInputStream(image22);
Bitmap carpic = BitmapFactory.decodeStream(imageStream);
// carpic = Bitmap.createScaledBitmap(carpic, 72,72, false);
carpict.setImageBitmap(carpic);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
3rd.
carpict.setImageURI
(Uri.parse(Environment.getExternalStorageDirectory().getAbsolutePath()+img_path));
4th.
File imgFile =new File("img_path");
carpict.setImageBitmap(BitmapFactory.decodeFile(imgFile.getAbsolutePath()));
I have also added
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
can anyone tell me where i am going wrong?

try this code
ImageView imageView = (ImageView) findViewById(R.id.imageView1);
System.out.println("sdcard path:"+Environment.getExternalStorageDirectory());
Drawable d = Drawable.createFromPath(Environment.getExternalStorageDirectory()+"/images.png");
imageView.setBackground(d);

imageView.setImageURI(Uri.parse(new File("PathToFile"));
or if you have the file reference:
File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath()
+"/Fleet/xylo.jpg");
imageView.setImageURI(Uri.parse(file));
This should work. You will need to use the file constructor version of Uri.parse to correctly set the image.
Do check if the image is present in this location, or if the image is valid. And please post the logs if this also doesn't work.

The problem was with the image itself when i tried with other images it worked images with formats .jpg .png .jpeg
ImageView carpict =(ImageView)findViewById(R.id.img);
Bitmap bitmap = BitmapFactory.decodeFile(img_path);
carpict.setImageBitmap(bitmap);
Here is the image xylo.jpg which is not getting set, don't know why
http://www.mediafire.com/?lh75aco1en8f3ot

Stirng path="///storage/sdcard0/Android/data/com.package.name/files/Download/Images/one-3.jpg"; //chang with your image file path
File file = new File(path);
imageView.setImageURI(Uri.parse(file.getPath()));

android remote bitmap is not shown

I am using following method to get bitmap from url but image is not displayed. Image is a png file about 50x50px. Thank you.
public static Bitmap getBitmapFromURL(String src) {
try {
Log.e("src",src);
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(input,null,options);
Log.e("Bitmap","returned");
//The new size we want to scale to
final int REQUIRED_SIZE=70;
//Find the correct scale value.
int scale=1;
while(options.outWidth/scale/2>=REQUIRED_SIZE && options.outHeight/scale/2>=REQUIRED_SIZE)
scale*=2;
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
return BitmapFactory.decodeStream(input, null, o2);
} catch (IOException e) {
e.printStackTrace();
Log.e("Exception",e.getMessage());
return null;
}
}

Your InputStream is "eaten away". You can use a stream only once and hence when you read the bitmap headers in order to scale the image your input stream gets 'eaten away'. You need to create a new InputStream in order to get the real bitmap.

How to set image as wallpaper programmatically?

I have been developing the application which need to set an image as wallpaper.
Code:
WallpaperManager m=WallpaperManager.getInstance(this);
String s=Environment.getExternalStorageDirectory().getAbsolutePath()+"/1.jpg";
File f=new File(s);
Log.e("exist", String.valueOf(f.exists()));
try {
InputStream is=new BufferedInputStream(new FileInputStream(s));
m.setBitmap(BitmapFactory.decodeFile(s));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("File", e.getMessage());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("IO", e.getMessage());
}
Also I have added the following permission:
<uses-permission android:name="android.permission.SET_WALLPAPER" />
But it doesn't works; the file exists on sdcard. Where have I made a mistake?

Possibly, you run out of memory if your image is big. You can make sure of it by reading Logcat logs. If this is the case, try to adjust your picture to device size by somewhat like this:
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels << 1; // best wallpaper width is twice screen width
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, width, height);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
Bitmap decodedSampleBitmap = BitmapFactory.decodeFile(path, options);
WallpaperManager wm = WallpaperManager.getInstance(this);
try {
wm.setBitmap(decodedSampleBitmap);
} catch (IOException e) {
Log.e(TAG, "Cannot set image as wallpaper", e);
}

File f = new File(Environment.getExternalStorageDirectory(), "1.jpg");
String path = f.getAbsolutePath();
File f1 = new File(path);
if(f1.exists()) {
Bitmap bmp = BitmapFactory.decodeFile(path);
BitmapDrawable bitmapDrawable = new BitmapDrawable(bmp);
WallpaperManager m=WallpaperManager.getInstance(this);
try {
m.setBitmap(bmp);
} catch (IOException e) {
e.printStackTrace();
}
}
Open Androidmanifest.xml file and add permission like..
<uses-permission android:name="android.permission.SET_WALLPAPER" />
Try this and let me know what happen..