CODEWITHSUNDEEP
javaandroidimageblobandroid-image
user3377716
user3377716

Reputation:

Convert encoded base64 image to File object in Android

I am trying to use the AndroidImageSlider library and populate it with images that I have downloaded as a base64 string.

The library only accepts URLs, R.drawable values, and the File object as parameters.

I am trying to convert the image string to a File object in order to be passed to the library function. I have been able to decode from base_64 and convert to a byte[] so far.

String imageData;
byte[] imgBytesData = android.util.Base64.decode(imageData, android.util.Base64.DEFAULT);

Upvotes: 7

Views: 12040

Answers (1)

pathfinderelite
pathfinderelite

Reputation: 3137

You'll need to save the File object to disk for that to work. This method will save the imageData string to disk and return the associated File object.

public static File saveImage(final Context context, final String imageData) {
    final byte[] imgBytesData = android.util.Base64.decode(imageData,
            android.util.Base64.DEFAULT);

    final File file = File.createTempFile("image", null, context.getCacheDir());
    final FileOutputStream fileOutputStream;
    try {
        fileOutputStream = new FileOutputStream(file);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
        return null;
    }

    final BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(
            fileOutputStream);
    try {
        bufferedOutputStream.write(imgBytesData);
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    } finally {
        try {
            bufferedOutputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return file;
}

It creates a temporary file in your applications 'cache' directory. However, you are still responsible for deleting the file once you no longer need it.

Upvotes: 11

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