CODEWITHSUNDEEP
javaandroid
Bradly Spicer
Bradly Spicer

Reputation: 2318

Using method from one class into class

I have two classes:

I would like to take the returning String from the method "getCurrentCar" and put it inside MyActivity.java

DatabaseHandler.Java: 

public class DatabaseHandler extends SQLiteOpenHelper {
    public Car getCurrentCar() {

            SQLiteDatabase db       =   getWritableDatabase();
            String sql              =   "SELECT " + KEY_ID + "," + KEY_IMAGE + " FROM " + TABLE_CARS + "ORDER BY RANDOM() LIMIT 1";
            Cursor cursor           =   db.rawQuery(sql, new String[] {});
            Car car = null;

            try {
                if (cursor.moveToFirst()) {
                    car = new Car(Integer.parseInt(cursor.getString(0)), cursor.getString(1), cursor.getString(2), cursor.getString(3));
                }
            }
            finally {
                if (cursor != null && !cursor.isClosed()) {
                    cursor.close();
                }
                    db.close();
            }
            return car;
        }
}

I have attempted already, but the parameters are asking for Context.

//DatabaseHandler handler = new DatabaseHandler(contexthere);
DatabaseHandler handler = new DatabaseHandler();
handler.getCurrentCar();

I would like to know how to take that return and put it inside my MyActivity.java so I can then use a BitmapFactory to recreate the image.

Thanks

Upvotes: 0

Views: 428

Answers (1)

Fevly Pallar
Fevly Pallar

Reputation: 3099

Context means current runtime :

protected void onCreate(Bundle savedInstanceState) {
        ...........
        ...........

         // you should  instantiate 'DatabaseHandler'  here
        DatabaseHandler db = new DatabaseHandler(this); // "this" refer to the context

        ..........
        ..........

 // insert the rows
 db.createCar(new Car("Sesame street A","23423","anImage1"));
 db.createCar(new Car("Sesame street B","43543","anImage2"));

 // get the rows which you mean string
 for(Car cars : db.getCurrentCar()){
 String rows= "id : "+ cars.getID()+ " address : "+getAddress() + "postcode : "+getPostcode()+" image : "+getImage());
 }  
}

Just adapt .getID(),getAddress(),getPostcode(),getImage() based on the 'getter' methods name in your Car class, as I might write them wrongly

** Codes above I write based on the file that you shared by a link. (your file missing Car class), but I just predict that it should be like above :

Upvotes: 1

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