public class DatabaseManager extends SQLiteOpenHelper {
// *************** Declare all the global variable *******************//
private Context myContext;
private String PACKAGE_NAME = "YOUR_PACKAGE_NAME";
// path of your datbase
private String DB_PATH = Environment.getDataDirectory() + "/data/"
+ PACKAGE_NAME + "/databases/";
// the extension may be .sqlite or .db
private static String DB_NAME = "YOUR_DATABASE_NAME";
private static String DB_ASSETNAME = "YOUR_ASSET_DATABASE_NAME";
public SQLiteDatabase myDataBase;
private ContentValues contentValues;
private Cursor cursor;
private ArrayList> arrayList;
private ArrayList array_list;
private HashMap hashMap;
private SimpleDateFormat dateformat, timeformat;
public DatabaseManager(Context context) throws IOException {
super(context, DB_NAME, null, 1);
// this.myDataBase = getWritableDatabase();
this.myContext = context;
boolean dbexist = checkdatabase();
if (dbexist) {
// System.out.println("Database exists");
opendatabase();
} else {
System.out.println("Database doesn't exist");
createdatabase();
}
}
public void createdatabase() throws IOException {
boolean dbexist = checkdatabase();
if (dbexist) {
System.out.println(" Database exists.");
} else {
this.getReadableDatabase();
try {
copydatabase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
private boolean checkdatabase() {
// SQLiteDatabase checkdb = null;
boolean checkdb = false;
try {
String myPath = DB_PATH + DB_NAME;
File dbfile = new File(myPath);
// checkdb =
// SQLiteDatabase.openDatabase(myPath,null,SQLiteDatabase.OPEN_READWRITE);
checkdb = dbfile.exists();
} catch (SQLiteException e) {
System.out.println("Database doesn't exist.....");
}
return checkdb;
}
private void copydatabase() throws IOException {
// Open your local db as the input stream
InputStream myinput = myContext.getAssets().open(DB_ASSETNAME);
// Path to the just created empty db
// String out filename = DB_PATH + DB_NAME;
// Open the empty db as the output stream
OutputStream myoutput = new FileOutputStream(DB_PATH + DB_NAME);
// transfer byte to input file to output file
byte[] buffer = new byte[1024];
int length;
while ((length = myinput.read(buffer)) > 0) {
myoutput.write(buffer, 0, length);
}
// Close the streams
myoutput.flush();
myoutput.close();
myinput.close();
}
public void opendatabase() throws SQLException {
// Open the database
String mypath = DB_PATH + DB_NAME;
myDataBase = SQLiteDatabase.openDatabase(mypath, null,
SQLiteDatabase.OPEN_READWRITE);
}
@Override
public synchronized void close() {
if (myDataBase != null) {
myDataBase.close();
}
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
