How to convert a file to Base64?

Question

Here the report contain the path(pathname in sdcard in string format)

File dir = Environment.getExternalStorageDirectory();
File yourFile = new File(dir, report);
String encodeFileToBase64Binary = encodeFileToBase64Binary(yourFile);

private static String encodeFileToBase64Binary(File fileName) throws IOException {
    byte[] bytes = loadFile(fileName);
    byte[] encoded = Base64.encodeBase64(bytes);

    String encodedString = new String(encoded);
    return encodedString;
}

in the byte[] encoded line getting this error. The method encodeBase64(byte[]) is undefined for the type Base64

Answer 1

String value = Base64.encodeToString(bytes, Base64.DEFAULT);

But you can directly convert it in to String .Hope this will work for you.

Answer 2

An updated, more efficient, Kotlin version, that bypasses Bitmaps and doesn't store entire ByteArray's in memory (risking OOM errors).

fun convertImageFileToBase64(imageFile: File): String {
    return ByteArrayOutputStream().use { outputStream ->
        Base64OutputStream(outputStream, Base64.DEFAULT).use { base64FilterStream ->
            imageFile.inputStream().use { inputStream ->
                inputStream.copyTo(base64FilterStream)
            }
        }
        return@use outputStream.toString()
    }
}

Answer 3

I believe these 2 sample codes will help at least someone the same way many have helped me through this platform. Thanks to StackOverflow.

// Converting Bitmap image to Base64.encode String type
    public String getStringImage(Bitmap bmp) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        byte[] imageBytes = baos.toByteArray();
        String encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
        return encodedImage;
}
    // Converting File to Base64.encode String type using Method
    public String getStringFile(File f) {
        InputStream inputStream = null; 
        String encodedFile= "", lastVal;
        try {
            inputStream = new FileInputStream(f.getAbsolutePath());

        byte[] buffer = new byte[10240];//specify the size to allow
        int bytesRead;
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        Base64OutputStream output64 = new Base64OutputStream(output, Base64.DEFAULT);

            while ((bytesRead = inputStream.read(buffer)) != -1) {
                output64.write(buffer, 0, bytesRead);
            }
        output64.close();
        encodedFile =  output.toString();
        } 
         catch (FileNotFoundException e1 ) {
                e1.printStackTrace();
            }
            catch (IOException e) {
                e.printStackTrace();
            }
        lastVal = encodedFile;
        return lastVal;
    }

I will be glad to answer any question regarding to these codes.

Answer 4

To convert a file to Base64:

File imgFile = new File(filePath);
if (imgFile.exists() && imgFile.length() > 0) {
    Bitmap bm = BitmapFactory.decodeFile(filePath);
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    bm.compress(Bitmap.CompressFormat.JPEG, 100, bOut);
    String base64Image = Base64.encodeToString(bOut.toByteArray(), Base64.DEFAULT);
}

Answer 5

Convert Any file, image or video or text into base64

1.Import the below Dependancy

 compile 'commons-io:commons-io:2.4'

2.Use below Code to convert file to base64

File file = new File(filePath);  //file Path
byte[] b = new byte[(int) file.length()];
 try {
    FileInputStream fileInputStream = new FileInputStream(file);
    fileInputStream.read(b);
    for (int j = 0; j < b.length; j++) {
        System.out.print((char) b[j]);
    }
} catch (FileNotFoundException e) {
    System.out.println("File Not Found.");
    e.printStackTrace();
} catch (IOException e1) {
    System.out.println("Error Reading The File.");
    e1.printStackTrace();
}

byte[] byteFileArray = new byte[0];
 try {
    byteFileArray = FileUtils.readFileToByteArray(file);
} catch (IOException e) {
    e.printStackTrace();
}

String base64String = "";
 if (byteFileArray.length > 0) {
    base64String = android.util.Base64.encodeToString(byteFileArray, android.util.Base64.NO_WRAP);
    Log.i("File Base64 string", "IMAGE PARSE ==>" + base64String);
}

Answer 6

You can try this.

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
...
byte[] byteArray = byteArrayOutputStream.toByteArray();
base64Value = Base64.encodeToString(byteArray, Base64.DEFAULT);

Answer 7

    public static String uriToBase64(Uri uri, ContentResolver resolver, boolean thumbnail) {
        String encodedBase64 = "";
        try {
            byte[] bytes = readBytes(uri, resolver, thumbnail);
            encodedBase64 = Base64.encodeToString(bytes, 0);
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        return encodedBase64;
    }

and call it in this way

   String image = BitmapUtils.uriToBase64(Uri.fromFile(file), context.getContentResolver());