Databasehelperclass for SQLite support in android

Databasehelper.java

package in.gehaxelt.sqlinjection;

import java.util.ArrayList;
import java.util.List;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;



public class Databasehelper extends SQLiteOpenHelper {

	static final String DBNAME = "sqlinjection" ;
	static final int DBVERSION = 1;
	static final String TABLENAME = "sqlinjection" ;
	static final String COLID = "ID" ;
	static final String COLTYPE = "TYPE" ;
	static final String COLDATE = "DATE" ;
	static final String COLTIME = "TIME" ;
	
	public Databasehelper(Context context) {
		super(context, DBNAME, null, DBVERSION);
		// TODO Auto-generated constructor stub
		
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		// TODO Auto-generated method stub
		db.execSQL("CREATE TABLE "+TABLENAME+"( "+COLID+ " INTEGER PRIMARY KEY AUTOINCREMENT, "+COLTYPE+" TEXT, "+ COLDATE + " VARCHAR(10), "+ COLTIME + " VARCHAR (5))");
		db.execSQL("INSERT INTO "+TABLENAME+" (TYPE,DATE,TIME) VALUES ('testtype','testdate','testtime')");
		db.execSQL("INSERT INTO "+TABLENAME+" (TYPE,DATE,TIME) VALUES ('testtype2','testdate2','testtime2')");
		db.execSQL("INSERT INTO "+TABLENAME+" (TYPE,DATE,TIME) VALUES ('testtype3','testdate3','testtime3')");
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		// TODO Auto-generated method stub
		db.execSQL("DROP TABLE "+ TABLENAME+" ");
		onCreate(db);
	}
	
	public String getID(String id){
	    String selectQuery = "SELECT TYPE FROM " + TABLENAME+ " where ID = "+id;
	    SQLiteDatabase db = this.getReadableDatabase();
	    Cursor cursor = db.rawQuery(selectQuery, null);
	    if (cursor.moveToFirst()) {
	    	db.close();
	    	return cursor.getString(0);
	    }
	    return "";
	    
	}
	
}