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Start your free trialMUZ140915 Ronald Dzingai
5,248 PointsWhere am I getting it wrong? Execute the appropriate statement in the onUpgrade() method on AlienSQLiteHelper.java
AlienSQLiteHelper.java public class AlienSQLiteHelper extends SQLiteOpenHelper { public static final String DB_NAME = "aliens.db"; public static final int DB_VERSION = 2; public static final String ALIENS_TABLE = "ALIENS"; public static final String COLUMN_NAME = "NAME"; public static final String COLUMN_TYPE = "TYPE"; public static final String COLUMN_HOME_PLANET = "HOME_PLANET"; public static final String CREATE_ALIENS = "CREATE TABLE " + ALIENS_TABLE + " (" + "_id INTEGER PRIMARY KEY AUTOINCREMENT," + COLUMN_NAME + " TEXT, " + COLUMN_TYPE + " TEXT," + COLUMN_HOME_PLANET + "TEXT)";
public static final String DB_ALTER = "ALTER TABLE " + ALIENS_TABLE + " ADD COLUMN " + COLUMN_HOME_PLANET + " TEXT ";
public AlienSQLiteHelper(Context context) { super(context, DB_NAME, null, DB_VERSION); }
@Override public void onCreate(SQLiteDatabase sqLiteDatabase) { sqLiteDatabase.execSQL(CREATE_ALIENS); }
@Override public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) {
switch (oldVersion) { case 1: database.execSQL(DB_ALTER); }
}
} }
public class AlienSQLiteHelper extends SQLiteOpenHelper {
public static final String DB_NAME = "aliens.db";
public static final int DB_VERSION = 2;
public static final String ALIENS_TABLE = "ALIENS";
public static final String COLUMN_NAME = "NAME";
public static final String COLUMN_TYPE = "TYPE";
public static final String COLUMN_HOME_PLANET = "HOME_PLANET";
public static final String CREATE_ALIENS = "CREATE TABLE " + ALIENS_TABLE + " (" +
"_id INTEGER PRIMARY KEY AUTOINCREMENT," +
COLUMN_NAME + " TEXT, " +
COLUMN_TYPE + " TEXT," +
COLUMN_HOME_PLANET + "TEXT)";
public static final String DB_ALTER = "ALTER TABLE " + ALIENS_TABLE + " ADD COLUMN " + COLUMN_HOME_PLANET + " TEXT ";
public AlienSQLiteHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
@Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
sqLiteDatabase.execSQL(CREATE_ALIENS);
}
@Override
public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) {
switch (oldVersion) {
case 1:
database.execSQL(DB_ALTER); }
//switch (oldVersion) { case 1: database.execSQL(DB_ALTER); }
}
}
}
MUZ140915 Ronald Dzingai
5,248 PointsNever mind, I finally got it, Thanks for the effort,
It should be: @Override public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) { switch (oldVersion) { case 1:database.execSQL(DB_ALTER); }
} The mistake was on the final closing brace, if you can try this one
Andrew Sheragy
16,379 PointsAndrew Sheragy
16,379 PointsWhat is the problem exactly, the execSQL(DB_ALTER) not getting called or is it running but not adding the new column? I noticed this error in CREATE_ALIENS
COLUMN_HOME_PLANET + "TEXT)"
should be a space before TEXT