Export the Contacts as VCF file

Question

I want to export the Phone contacts to External storage area. I didn\'t work with this type of method. Anyone guide me to do this?

Answer 1

Android Nougat Update :

Other answers code working for lots of people before Nougat update.

Please take care of :

byte[] buf = new byte[(int) fd.getDeclaredLength()];

is not working on Android Nougat.

fd.getDeclaredLength() is always return -1.

Please use below code for read bytes without any library :

byte[] buf = readBytes(fis);

public byte[] readBytes(InputStream inputStream) throws IOException {
    // this dynamically extends to take the bytes you read
    ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();

    // this is storage overwritten on each iteration with bytes
    int bufferSize = 1024;
    byte[] buffer = new byte[bufferSize];

    // we need to know how may bytes were read to write them to the byteBuffer
    int len = 0;
    while ((len = inputStream.read(buffer)) != -1) {
        byteBuffer.write(buffer, 0, len);
    }

    // and then we can return your byte array.
    return byteBuffer.toByteArray();
}

The method readBytes() get from this answer.