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); |
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final EditText editValue1 = (EditText) this.findViewById(R.id.edit_value1); |
final EditText editValue2 = (EditText) this.findViewById(R.id.edit_value2); |
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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); |
} |
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editValue2.setText(string2); |
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return false; |
} |
}; |
editValue1.setOnKeyListener(editValue1OnKey); |
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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); |
} |
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editValue1.setText(string1); |
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return false; |
} |
}; |
editValue2.setOnKeyListener(editValue2OnKey); |
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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 */ |
} |
}); |
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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; |
} |
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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; |
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case ITEM_MILES: |
newValue = new Double(value / 1.609344); |
break; |
} |
} |
|
return newValue.toString(); |
} |
} |