private static void setNextSignedPreKeyId(Context context, int id) {
try {
File nextFile = new File(getSignedPreKeysDirectory(context), SignedPreKeyIndex.FILE_NAME);
FileOutputStream fout = new FileOutputStream(nextFile);
fout.write(JsonUtils.toJson(new SignedPreKeyIndex(id)).getBytes());
fout.close();
} catch (IOException e) {
Log.w("PreKeyUtil", e);
}
}
private static int getNextSignedPreKeyId(Context context) {
try {
File nextFile = new File(getSignedPreKeysDirectory(context), SignedPreKeyIndex.FILE_NAME);
if (!nextFile.exists()) {
return Util.getSecureRandom().nextInt(Medium.MAX_VALUE);
} else {
InputStreamReader reader = new InputStreamReader(new FileInputStream(nextFile));
SignedPreKeyIndex index = JsonUtils.fromJson(reader, SignedPreKeyIndex.class);
reader.close();
return index.nextSignedPreKeyId;
}
} catch (IOException e) {
Log.w("PreKeyUtil", e);
return Util.getSecureRandom().nextInt(Medium.MAX_VALUE);
}
}