Этот код может вам помочь.
public class DbHelper {
private static final String DATABASE_NAME = "rayyildiz_sample.db";
private static final int DATABASE_VERSION = 1;
private static final String TABLE_NAME = "Test";
private static final String TABLE_CREATE = "CREATE TABLE " + TABLE_NAME + " ( "
+ " \"Id\" INTEGER PRIMARY KEY,"
+ " \"Firstname\" TEXT,"
+ " \"Lastname\" TEXT,"
+ " \"PhoneNumber\" TEXT" + ")";
private static final String TABLE_INSERT = "INSERT INTO " + TABLE_NAME + "(Firstname,Lastname,PhoneNumber) VALUES (?,?,?)";
private Context context;
private SQLiteDatabase database;
private SQLiteStatement insertSQLiteStatement;
public DbHelper(Context context) {
this.context = context;
DbOpenHelper dbOpenHelper = new DbOpenHelper(context);
database = dbOpenHelper.getWritableDatabase();
insertSQLiteStatement = database.compileStatement(TABLE_INSERT);
}
public void close(){
database.close();
}
public void reopen(){
close();
DbOpenHelper dbOpenHelper = new DbOpenHelper(context);
database = dbOpenHelper.getWritableDatabase();
}
private static class DbOpenHelper extends SQLiteOpenHelper {
public DbOpenHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(TABLE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
}
}