将位图保存到文件中以上传到 OCR

Question

I am cropping an image using coordinates and I am managing to get a bitmap. What I would like to do is save the bitmap in a file so that I can upload the path to Microsoft's OCR.

I have tried to output stream's in a file in a different function then returning the file. But the file would return null.

Bitmap bmpCroppedID = Bitmap.createBitmap(correctedBmp, idX, idY, idCroppedWidth, idCroppedHeight);

idImageView = findViewById(R.id.idImageView);
idImageView.setImageBitmap(bmpCroppedID);
try {
    filepathID= getImageFile(bmpCroppedID);
    text1.setText(file.getAbsolutePath());
} catch (IOException e) {
    e.printStackTrace();
}

Bitmap bmpCroppedVoltage = Bitmap.createBitmap(correctedBmp, voltageX, voltageY, voltageCroppedWidth, voltageCroppedHeight);

voltageImageView = findViewById(R.id.voltageImageView);
voltageImageView.setImageBitmap(bmpCroppedVoltage);
try {
    filepathVoltage= getImageFile(bmpCroppedVoltage);
    text2.setText(file2.getAbsolutePath());
} catch (IOException e) {
    e.printStackTrace();
}
private String getImageFile(Bitmap bitmap) throws IOException {

String timeStamp= new  SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());

String imageName= "jpg "+timeStamp+"_";

File storageDir= getExternalFilesDir(Environment.DIRECTORY_PICTURES);

File imageFile= File.createTempFile(imageName,".jpg",storageDir);

FileOutputStream fileOutputStream = new FileOutputStream(imageFile);

bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fileOutputStream);

fileOutputStream.flush();
fileOutputStream.close();

currentImagePath= imageFile.getAbsolutePath();
return currentImagePath;
}

The image is being cropped perfectly and what I am expecting is to get the path to the save and compressed image so that I can send it to Microsoft's API.

Answer 1

You will need to add this permission to your AndroidManifest.xml file:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

If that is in place, check your instruction:

File storageDir= getExternalFilesDir(Environment.DIRECTORY_PICTURES);

I believe that this should be:

File storageDir= new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES));

getExternalFilesDir returns a path string, not a file.