1,57 → 1,263 |
/* |
* Copyright (C) 2008 The Android Open Source Project |
* |
* Licensed under the Apache License, Version 2.0 (the "License"); |
* you may not use this file except in compliance with the License. |
* You may obtain a copy of the License at |
* |
* http://www.apache.org/licenses/LICENSE-2.0 |
* |
* Unless required by applicable law or agreed to in writing, software |
* distributed under the License is distributed on an "AS IS" BASIS, |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
* See the License for the specific language governing permissions and |
* limitations under the License. |
*/ |
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package ch.ffhs.converter.app; |
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// Need the following import to get access to the app resources, since this |
// class is in a sub-package. |
import java.util.HashMap; |
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import android.app.Activity; |
import android.os.Bundle; |
import android.view.Window; |
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 android.widget.TextView; |
import ch.ffhs.converter.R; |
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/** |
* <h3>Dialog Activity</h3> |
* Activity that implements length conversion |
* |
* <p> |
* This demonstrates the how to write an activity that looks like a pop-up |
* dialog. |
* </p> |
* @author pelinux |
*/ |
public class TemperaturesActivity extends Activity |
{ |
/** |
* Initialization of the Activity after it is first created. Must at least |
* call {@link android.app.Activity#setContentView setContentView()} to |
* describe what is to be displayed in the screen. |
* |
*/ |
private static final String MSG_BELOW_ABS_ZERO = "K must be >= 0"; |
/* |
* Constants for mapping value strings to internal IDs |
*/ |
private static final String VALUE_CELSIUS = "C"; //$NON-NLS-1$ |
private static final String VALUE_FAHRENHEIT = "F"; //$NON-NLS-1$ |
private static final String VALUE_KELVIN = "K"; //$NON-NLS-1$ |
private static final int ITEM_CELSIUS = 0; |
private static final int ITEM_FAHRENHEIT = 1; |
private static final int ITEM_KELVIN = 2; |
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/** |
* Maps value strings to internal IDs |
*/ |
private final static HashMap<String, Integer> valueToId = |
new HashMap<String, Integer>(); |
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/* Unit spinners (dropdowns) */ |
private Spinner spinnerUnit1; |
private Spinner spinnerUnit2; |
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/* Hint that value is off scale */ |
private TextView textOffScale; |
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static |
{ |
TemperaturesActivity.valueToId.put(TemperaturesActivity.VALUE_CELSIUS, |
TemperaturesActivity.ITEM_CELSIUS); |
TemperaturesActivity.valueToId.put(TemperaturesActivity.VALUE_FAHRENHEIT, |
TemperaturesActivity.ITEM_FAHRENHEIT); |
TemperaturesActivity.valueToId.put(TemperaturesActivity.VALUE_KELVIN, |
TemperaturesActivity.ITEM_KELVIN); |
} |
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/** Called when the activity is first created. */ |
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@Override |
protected void onCreate(Bundle savedInstanceState) |
public void onCreate(Bundle savedInstanceState) |
{ |
// Be sure to call the super class. |
super.onCreate(savedInstanceState); |
this.setContentView(R.layout.activity_temperatures); |
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this.requestWindowFeature(Window.FEATURE_LEFT_ICON); |
this.textOffScale = |
(TextView) this.findViewById(R.id.temperatures_text_off_scale); |
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// See assets/res/any/layout/dialog_activity.xml for this |
// view layout definition, which is being set here as |
// the content of our screen. |
this.setContentView(R.layout.dialog_activity); |
final EditText editValue1 = |
(EditText) this.findViewById(R.id.temperatures_edit_value1); |
final EditText editValue2 = |
(EditText) this.findViewById(R.id.temperatures_edit_value2); |
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this.getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON, |
android.R.drawable.ic_dialog_alert); |
final OnKeyListener editValue1OnKey = new OnKeyListener() { |
@Override |
public boolean onKey(View v, int keyCode, KeyEvent event) |
{ |
Editable editable1 = ((EditText) v).getText(); |
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Double value1; |
try |
{ |
value1 = Double.parseDouble(editable1.toString()); |
} |
catch (NumberFormatException e) |
{ |
value1 = null; |
} |
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String string2 = ""; //$NON-NLS-1$ |
if (value1 != null) |
{ |
string2 = TemperaturesActivity.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(); |
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Double value2; |
try |
{ |
value2 = Double.parseDouble(editable2.toString()); |
} |
catch (NumberFormatException e) |
{ |
value2 = null; |
} |
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String string1 = ""; //$NON-NLS-1$ |
if (value2 != null) |
{ |
string1 = TemperaturesActivity.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.temperatures_spinner_unit1); |
this.spinnerUnit2 = |
(Spinner) this.findViewById(R.id.temperatures_spinner_unit2); |
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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); |
} |
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@Override |
public void onNothingSelected(AdapterView<?> arg0) |
{ |
/* no-op */ |
} |
}); |
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this.spinnerUnit2.setSelection(1); |
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); |
} |
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@Override |
public void onNothingSelected(AdapterView<?> arg0) |
{ |
/* no-op */ |
} |
}); |
} |
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/** |
* @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.temperature_units_values); |
String selectedItemValue1 = itemArray[selectedItemPosition1]; |
String selectedItemValue2 = itemArray[selectedItemPosition2]; |
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if (reverse) |
{ |
String tmp = selectedItemValue1; |
selectedItemValue1 = selectedItemValue2; |
selectedItemValue2 = tmp; |
} |
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int itemId1 = TemperaturesActivity.valueToId.get(selectedItemValue1); |
int itemId2 = TemperaturesActivity.valueToId.get(selectedItemValue2); |
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Double newValue = value; |
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this.textOffScale.setVisibility(View.INVISIBLE); |
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switch (itemId1) |
{ |
case ITEM_CELSIUS: |
switch (itemId2) |
{ |
case ITEM_FAHRENHEIT: |
newValue = new Double(value * 9.0 / 5 + 32); |
break; |
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case ITEM_KELVIN: |
newValue = new Double(value + 273.15); |
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if (newValue < 0.0) |
{ |
this.textOffScale.setVisibility(View.VISIBLE); |
return "*" + newValue.toString(); |
} |
break; |
} |
break; |
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case ITEM_FAHRENHEIT: |
switch (itemId2) |
{ |
case ITEM_CELSIUS: |
newValue = new Double((value - 32) * 5.0 / 9); |
break; |
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case ITEM_KELVIN: |
newValue = new Double((value + 459.67) * 5.0 / 9); |
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if (newValue < 0.0) |
{ |
this.textOffScale.setVisibility(View.VISIBLE); |
return "*" + newValue.toString(); |
} |
break; |
} |
break; |
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case ITEM_KELVIN: |
if (value < 0.0) |
{ |
return TemperaturesActivity.MSG_BELOW_ABS_ZERO; |
} |
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switch (itemId2) |
{ |
case ITEM_CELSIUS: |
newValue = new Double(value - 273.15); |
break; |
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case ITEM_FAHRENHEIT: |
newValue = new Double(value * 9.0 / 5 - 459.67); |
break; |
} |
break; |
} |
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return newValue.toString(); |
} |
} |