Question

I have a MainClass which one is the full app, when I click one button I go to another class (PopupValores) which one I make it looks like a popup. In this class I have a EditText where you type a integer and a button to close this class. My question is how to get that int typed in PopupClass and use it in MainClass. Heres the code for the PopupValores.

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class PopupValores extends Activity implements OnClickListener {

TextView texto;
String mensaje;
EditText editable;
Button ok;
public static int cantidad;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.popupvalores);

    ok = (Button) findViewById (R.id.Bok);
    texto = (TextView) findViewById (R.id.textView1);
    editable = (EditText) findViewById (R.id.editText1);
    mensaje = editable.getText().toString();
    ok.setOnClickListener(this);

    ok.setOnLongClickListener(new View.OnLongClickListener() {
        public boolean onLongClick(View arg0) {
            finish();
            return true;
        }
    });


}

public void onClick(View v){
    switch(v.getId()){
    case R.id.Bok:

    String mensaje;
    mensaje = editable.getText().toString();

    cantidad = Integer.parseInt(mensaje);

    texto.setText("New value " + cantidad + ".");

    }
}
}

Then in my MainClass I click a button and it shows the int

int id, vaas = PopupValores.cantidad;
public void onClick (View v)
{   
posicion = (ImageCell) v;
seleccion = posicion.mCellNumber;

if (seleccion == -1){
    ....
    toast (id + " " + vaas);
    ....
}
}

But instead of showing the value declared in PopupValores it shows 0. What I’m doing wrong here?

Answer 1

1. You need to call the popup Activity with Activity.startActivityForResult()
2. Once finishing the popup Activity, set the requested result via Activity.setResult() (you can save your data in the intent’s bundle)
3. In your main Activity, override onActivityResult and retrieve the data