private boolean BackupAvailable() {
// Set the folder on the SDcard
File filePath =
new File(FileBackend.getConversationsDirectory() + "/database/database.db.crypt");
Log.d(Config.LOGTAG, "DB Path: " + filePath.toString());
if (filePath.exists()) {
Log.d(Config.LOGTAG, "DB Path existing");
return true;
} else {
Log.d(Config.LOGTAG, "DB Path not existing");
return false;
}
}
private void ImportDatabase() throws IOException {
// Set location for the db:
final OutputStream OutputFile =
new FileOutputStream(this.getDatabasePath(DatabaseBackend.DATABASE_NAME));
// Set the folder on the SDcard
File directory = new File(FileBackend.getConversationsDirectory() + "/database/");
// Set the input file stream up:
final InputStream InputFile = new FileInputStream(directory.getPath() + "/database.bak");
// set temp file
File TempFile = new File(directory.getPath() + "/database.bak");
// Transfer bytes from the input file to the output file
byte[] buffer = new byte[1024];
int length;
while ((length = InputFile.read(buffer)) > 0) {
OutputFile.write(buffer, 0, length);
}
if (TempFile.exists()) {
Log.d(Config.LOGTAG, "Delete temp file from " + TempFile.toString());
TempFile.delete();
}
restart();
}
private void checkDatabase(String DecryptionKey) throws IOException {
// Set the folder on the SDcard
File directory = new File(FileBackend.getConversationsDirectory() + "/database/");
// Set the input file stream up:
FileInputStream InputFile = new FileInputStream(directory.getPath() + "/database.db.crypt");
// Temp output for DB checks
File TempFile = new File(directory.getPath() + "/database.bak");
FileOutputStream OutputTemp = new FileOutputStream(TempFile);
try {
EncryptDecryptFile.decrypt(InputFile, OutputTemp, DecryptionKey);
} catch (NoSuchAlgorithmException e) {
Log.d(Config.LOGTAG, "Database importer: decryption failed with " + e);
e.printStackTrace();
} catch (NoSuchPaddingException e) {
Log.d(Config.LOGTAG, "Database importer: decryption failed with " + e);
e.printStackTrace();
} catch (InvalidKeyException e) {
Log.d(Config.LOGTAG, "Database importer: decryption failed (invalid key) with " + e);
e.printStackTrace();
} catch (IOException e) {
Log.d(Config.LOGTAG, "Database importer: decryption failed (IO) with " + e);
e.printStackTrace();
}
SQLiteDatabase checkDB = null;
int DB_Version = DatabaseBackend.DATABASE_VERSION;
int Backup_DB_Version = 0;
try {
String dbPath = TempFile.toString();
checkDB = SQLiteDatabase.openDatabase(dbPath, null, SQLiteDatabase.OPEN_READONLY);
Backup_DB_Version = checkDB.getVersion();
Log.d(Config.LOGTAG, "Backup found: " + checkDB + " Version: " + checkDB.getVersion());
} catch (SQLiteException e) {
// database does't exist yet.
Log.d(Config.LOGTAG, "No backup found: " + checkDB);
}
if (checkDB != null) {
checkDB.close();
}
Log.d(
Config.LOGTAG,
"checkDB = "
+ checkDB.toString()
+ ", Backup DB = "
+ Backup_DB_Version
+ ", DB = "
+ DB_Version);
if (checkDB != null && Backup_DB_Version != 0 && Backup_DB_Version <= DB_Version) {
ImportDatabase();
} else if (checkDB != null && Backup_DB_Version == 0) {
WelcomeActivity.this.runOnUiThread(
new Runnable() {
public void run() {
Toast.makeText(WelcomeActivity.this, R.string.Password_wrong, Toast.LENGTH_LONG)
.show();
}
});
enterPasswordDialog();
} else {
WelcomeActivity.this.runOnUiThread(
new Runnable() {
public void run() {
Toast.makeText(WelcomeActivity.this, R.string.Import_failed, Toast.LENGTH_LONG)
.show();
}
});
}
}