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Downloading files into a folder inside android application
directory = new File (Environment.getExternalStorageDirectory().toString()  +"/data/"+getPackageName()+"/files");

directory.mkdirs();


if(DeleteFlag!=1 || !downloadTask.isCancelled()){

file1 = new File(directory, audioFileName);

output = new FileOutputStream(file1);

byte data[] = new byte[1024];

long total = 0;

    while ((count = input.read(data)) != -1) {
        total += count;
        publishProgress(""+(int)((total*100)/lenghtOfFile));
        output.write(data, 0, count);
    }
    }