CODEWITHSUNDEEP
javaandroideclipse
SaDeGH_F
SaDeGH_F

Reputation: 481

How to pass a value of a type and convert it to another type?

I'm trying to pass an integer value from an activity to another one.
In the second activity I want to convert my string to an integer to do some calculations and convert it again to a string for showing it in a TextView.

This is my first activity:

public class GetPrice extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.getprice);
    final EditText et1 = (EditText) findViewById(R.id.getprice);
    Button getb1 = (Button) findViewById(R.id.getbutton);

    getb1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            Intent i1 = new Intent(GetPrice.this, Price1.class);
            int fl1 = Integer.parseInt(et1.getText().toString());
            i1.putExtra("theprice", fl1);
             startActivity(i1);
        }
    });

And this is my second activity:

public class Price1 extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.price1);


    String st1 = new String(getIntent().getExtras().getString("theprice"));

    Integer int1 = Integer.valueOf(st1);

    //some calculation with int1

    TextView tv1 = (TextView) findViewById(R.id.price1text);
    tv1.setText(String.valueOf(int1));

}

But, when I press the "getbutton", the application crashes.

what is the problem?

Thanks

Upvotes: 0

Views: 133

Answers (2)

MariuszS
MariuszS

Reputation: 31597

Use Bundle.getInt(String key) for accessing int fl1 putted in GetPrice class. 

 Integer int1 = getIntent().getExtras().getInt("theprice");

Updated to older JDK.

Also you dont need to reconvert values from type to type like this:

String st1 = new String(getString...);
Integer int1 = Integer.valueOf(st1);
tv1.setText(String.valueOf(int1));

The should be simplified to code like this

String st1 = Integer.toString(getString...);
tv1.setText(st1);

or even better

Integer int1 = getInt...;
tv1.setText(String.valueOf(int1));

Upvotes: 1

Brian Roach
Brian Roach

Reputation: 76908

Without the stacktrace and the actual error, either

int fl1 = Integer.parseInt(et1.getText().toString());

is the problem, and the String isn't a textual representation of an integer, or that's actually working and this:

String st1 = new String(getIntent().getExtras().getString("theprice"));

is the problem because you stored an Integer in extras and are now trying to get it as a String (use getInt("theprice") instead).

Upvotes: 3

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