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public static String encodeBase64File(String path) throws Exception {
File file = new File(path);
FileInputStream inputFile = new FileInputStream(file);
byte[] buffer = new byte[(int)file.length()];
inputFile.read(buffer);
inputFile.close();
return Base64.encodeToString(buffer, Base64.DEFAULT);
}
NSData *nsdataFromBase64String3 = [[NSData alloc]
initWithBase64EncodedString:base64String options:0];