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Last modification

Ignore whitespace Rev 5 → Rev 6

/trunk/src/ch/ffhs/converter/app/LengthsActivity.java
1,12 → 1,60
package ch.ffhs.converter.app;
 
import ch.ffhs.converter.R;
import ch.ffhs.converter.R.layout;
import java.util.HashMap;
 
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.EditText;
import android.widget.Spinner;
import ch.ffhs.converter.R;
 
/**
* Activity that implements length conversion
*
* @author pelinux
*/
public class LengthsActivity extends Activity
{
/*
* Constants for mapping value strings to internal IDs
*/
private static final String VALUE_INCHES = "inch"; //$NON-NLS-1$
private static final String VALUE_METERS = "m"; //$NON-NLS-1$
private static final String VALUE_MILES = "mi"; //$NON-NLS-1$
private static final String VALUE_KILOMETERS = "km"; //$NON-NLS-1$
private static final int ITEM_INCHES = 0;
private static final int ITEM_METERS = 1;
private static final int ITEM_MILES = 2;
private static final int ITEM_KILOMETERS = 3;
 
/**
* Maps value strings to internal IDs
*/
private final static HashMap<String, Integer> valueToId =
new HashMap<String, Integer>();
 
/* Unit spinners (dropdowns) */
private Spinner spinnerUnit1;
private Spinner spinnerUnit2;
 
static
{
LengthsActivity.valueToId.put(LengthsActivity.VALUE_INCHES,
LengthsActivity.ITEM_INCHES);
LengthsActivity.valueToId.put(LengthsActivity.VALUE_METERS,
LengthsActivity.ITEM_METERS);
LengthsActivity.valueToId.put(LengthsActivity.VALUE_MILES,
LengthsActivity.ITEM_MILES);
LengthsActivity.valueToId.put(LengthsActivity.VALUE_KILOMETERS,
LengthsActivity.ITEM_KILOMETERS);
}
 
/** Called when the activity is first created. */
 
@Override
13,7 → 61,206
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
this.setContentView(R.layout.frm_laengen);
this.setContentView(R.layout.activity_lengths);
 
final EditText editValue1 = (EditText) this.findViewById(R.id.edit_value1);
final EditText editValue2 = (EditText) this.findViewById(R.id.edit_value2);
 
final OnKeyListener editValue1OnKey = new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event)
{
Editable editable1 = ((EditText) v).getText();
 
double value1;
try
{
value1 = Double.parseDouble(editable1.toString());
}
catch (NumberFormatException e)
{
value1 = -1.0;
}
 
String string2 = ""; //$NON-NLS-1$
if (value1 >= 0.0)
{
string2 = LengthsActivity.this.getConvertedValue(value1, false);
}
 
editValue2.setText(string2);
 
return false;
}
};
editValue1.setOnKeyListener(editValue1OnKey);
 
final OnKeyListener editValue2OnKey = new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event)
{
Editable editable2 = ((EditText) v).getText();
 
double value2;
try
{
value2 = Double.parseDouble(editable2.toString());
}
catch (NumberFormatException e)
{
value2 = -1.0;
}
 
String string1 = ""; //$NON-NLS-1$
if (value2 >= 0.0)
{
string1 = LengthsActivity.this.getConvertedValue(value2, true);
}
 
editValue1.setText(string1);
 
return false;
}
};
editValue2.setOnKeyListener(editValue2OnKey);
 
this.spinnerUnit1 = (Spinner) this.findViewById(R.id.spinner_unit1);
this.spinnerUnit2 = (Spinner) this.findViewById(R.id.spinner_unit2);
 
this.spinnerUnit1.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
/* Simulate input in second EditText so that first EditText is updated */
editValue2OnKey.onKey(editValue2, 0, null);
}
 
@Override
public void onNothingSelected(AdapterView<?> arg0)
{
/* no-op */
}
});
 
this.spinnerUnit2.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
/* Simulate input in first EditText so that second EditText is updated */
editValue1OnKey.onKey(editValue1, 0, null);
}
 
@Override
public void onNothingSelected(AdapterView<?> arg0)
{
/* no-op */
}
});
}
 
/**
* @param value
* @return
*/
private String getConvertedValue(double value, boolean reverse)
{
int selectedItemPosition1 = this.spinnerUnit1.getSelectedItemPosition();
int selectedItemPosition2 = this.spinnerUnit2.getSelectedItemPosition();
String[] itemArray =
this.getResources().getStringArray(R.array.length_units_values);
String selectedItemValue1 = itemArray[selectedItemPosition1];
String selectedItemValue2 = itemArray[selectedItemPosition2];
 
if (reverse)
{
String tmp = selectedItemValue1;
selectedItemValue1 = selectedItemValue2;
selectedItemValue2 = tmp;
}
 
int itemId1 = LengthsActivity.valueToId.get(selectedItemValue1);
int itemId2 = LengthsActivity.valueToId.get(selectedItemValue2);
 
Double newValue = value;
 
switch (itemId1)
{
case ITEM_INCHES:
switch (itemId2)
{
case ITEM_METERS:
newValue = new Double(value * 0.0254);
break;
 
case ITEM_MILES:
/* 12 in/ft and 5280 ft/mi */
newValue = new Double(value / 12 / 5280);
break;
 
case ITEM_KILOMETERS:
/* see ITEM_METERS */
newValue = new Double((value * 0.0254) / 1000);
break;
}
break;
 
case ITEM_METERS:
switch (itemId2)
{
case ITEM_KILOMETERS:
newValue = new Double(value / 1000);
break;
 
case ITEM_INCHES:
/* 1 m = 39.370 in */
newValue = new Double(value * 39.370);
break;
 
case ITEM_MILES:
/* 1 mi = 1609.344 m */
newValue = new Double(value / 1609.344);
break;
}
break;
 
case ITEM_MILES:
switch (itemId2)
{
case ITEM_INCHES:
/* 1 mi = 5280 ft, 1 ft = 12 in */
newValue = new Double(value * 5280 * 12);
break;
 
case ITEM_METERS:
newValue = new Double(value * 1609.344);
break;
 
case ITEM_KILOMETERS:
newValue = new Double(value * 1.609344);
break;
}
break;
 
case ITEM_KILOMETERS:
switch (itemId2)
{
case ITEM_INCHES:
/* 1 m = 39.370 in */
newValue = new Double(value * 1000 * 39.370);
break;
 
case ITEM_METERS:
newValue = new Double(value * 1000);
break;
 
case ITEM_MILES:
newValue = new Double(value / 1.609344);
break;
}
}
 
return newValue.toString();
}
}