۱۳۹۴/۰۱/۱۱, ۰۳:۰۴ ب.ظ
کد پیاچپی:
public class database extends SQLiteOpenHelper {
public final String path = "data/data/*your-package-name*/databases/";
public final String Name = "your db name";
public SQLiteDatabase mydb;
private final Context mycontext;
public database(Context context) {
super(context, "your db name", null, 1);
mycontext = context;
}
@Override
public void onCreate(SQLiteDatabase arg0) {
}
@Override
public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
}
public void useable() {
boolean checkdb = checkdb();
if (checkdb) {
} else {
this.getReadableDatabase();
try {
copydatabase();
}
catch (IOException e) {
}
}
}
public void open() {
mydb = SQLiteDatabase.openDatabase(path + Name, null, SQLiteDatabase.OPEN_READWRITE);
}
@Override
public void close() {
mydb.close();
}
public boolean checkdb() {
SQLiteDatabase db = null;
try {
db = SQLiteDatabase.openDatabase(path + Name, null, SQLiteDatabase.OPEN_READONLY);
}
catch (SQLException e) {
}
return db != null ? true : false;
}
public void copydatabase() throws IOException {
OutputStream myOutput = new FileOutputStream(path + Name);
byte[] buffer = new byte[1024];
int lenght;
InputStream myInput = mycontext.getAssets().open(Name);
while ((lenght = myInput.read(buffer)) > 0) {
myOutput.write(buffer, 0, lenght);
}
myInput.close();
myOutput.flush();
myOutput.close();
}
