get user selection and convert it to a String [Android]
- by Kira
Hello, I just got a Droid, and after having used it for a while, I felt like I wanted to make a program for it. The program that I am trying to make calculates the actual storage capacity of secondary storage mediums. The user select from a list of units that ranges from KB to YB and the size the entered gets put into a formula depending on the chosen unit. However, there is a bit of a problem with the program. From my testing, I have narrowed it down to the fact that the user's selection is not really being obtained from the spinner. Everything I look up seems to point me to a method quite similar to how it works in J2SE, but it does nothing. How am I actually supposed to get that data?
Here is the Java source code for the app:
package com.Actual.android;
import android.app.Activity;
import android.os.Bundle;
import android.widget.*;
import android.view.*;
public class ActualStorageActivity extends Activity
{
Spinner selection; /* declare variable, in order to control spinner (ComboBox) */
ArrayAdapter adapter; /* declare an array adapter object, in order for spinner to work */
EditText size; /* declare variable to control textfield */
EditText result; /* declare variable to control textfield */
Button calculate; /* declare variable to control button */
Storage capacity = new Storage(); /* import custom class for formulas */
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main); // load content from XML
selection = (Spinner)findViewById(R.id.spinner);
adapter = ArrayAdapter.createFromResource(this, R.array.choices_array, android.R.layout.simple_spinner_dropdown_item);
size = (EditText)findViewById(R.id.size);
result = (EditText)findViewById(R.id.result);
calculate = (Button)findViewById(R.id.submit);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); /* set resource for dropdown */
selection.setAdapter(adapter); // attach adapter to spinner
result.setEnabled(false); // make read-only
result.setText("usable storage");
}
public void calcAction(View view) {
String initial = size.getText().toString();
String unit = selection.getSelectedItem().toString();
String end = "Nothing";
double convert = Double.parseDouble(initial);
capacity.setStorage(convert);
if (unit == "KB")
{
end = Double.toString(capacity.getKB());
}
else if (unit == "MB")
{
end = Double.toString(capacity.getMB());
}
else if (unit == "GB")
{
end = Double.toString(capacity.getGB());
}
else if (unit == "TB")
{
end = Double.toString(capacity.getTB());
}
else if (unit == "PB")
{
end = Double.toString(capacity.getPB());
}
else if (unit == "EB")
{
end = Double.toString(capacity.getEB());
}
else if (unit == "ZB")
{
end = Double.toString(capacity.getZB());
}
else if (unit == "YB")
{
end = Double.toString(capacity.getYB());
}
else;
result.setText(end);
}
}
