WebSVN - ES - Diff - Rev 12 and 13 - /trunk/src/de/pointedears/converter/app/CurrenciesActivity.java


package de.pointedears.converter.app;

import java.util.HashMap;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import de.pointedears.converter.R;
import de.pointedears.converter.db.CurrenciesDatabase;

/**
 * Activity that implements currency conversion
 *
 * @author pelinux
 */
public class CurrenciesActivity extends Activity
{
  /*
   * Constants for mapping value strings
   *
   * @todo: Use resource IDs
   */
  /**
   * Database field/spinner value for Swiss Francs
   */
  public static final String VALUE_CHF = "CHF"; //$NON-NLS-1$

  /**
   * Database field/spinner value for Euros
   */

  public static final String VALUE_EUR = "EUR"; //$NON-NLS-1$

  /**
   * Database field/spinner value for US Dollars
   */
  public static final String VALUE_USD = "USD"; //$NON-NLS-1$

  /* Unit spinners (dropdowns) */
  private Spinner spinnerUnit1;
  private Spinner spinnerUnit2;
  private CurrenciesDatabase db;

  private HashMap<String, HashMap<String, Double>> conversionRates;

  /** Called when the activity is first created. */

  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    this.setContentView(R.layout.activity_currencies);

    /* Set up currency database, and retrieve conversion rates */
    this.db = new CurrenciesDatabase(this);
    this.conversionRates = this.db.getConversionRates();

    final EditText editValue1 =
      (EditText) this.findViewById(R.id.currencies_edit_value1);
    final EditText editValue2 =
      (EditText) this.findViewById(R.id.currencies_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 = null;
        }

        String string2 = ""; //$NON-NLS-1$
        if (value1 != null)
        {
          string2 = CurrenciesActivity.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 = null;
        }

        String string1 = ""; //$NON-NLS-1$
        if (value2 != null)
        {
          string1 = CurrenciesActivity.this.getConvertedValue(value2, true);
        }

        editValue1.setText(string1);

        return false;
      }
    };
    editValue2.setOnKeyListener(editValue2OnKey);

    this.spinnerUnit1 =
      (Spinner) this.findViewById(R.id.currencies_spinner_unit1);
    this.spinnerUnit2 =
      (Spinner) this.findViewById(R.id.currencies_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.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);
      }

      @Override
      public void onNothingSelected(AdapterView<?> arg0)
      {
        /* no-op */
      }
    });

    Button buttonClear =
      (Button) this.findViewById(R.id.currencies_button_clear);
    buttonClear.setOnClickListener(new OnClickListener() {

      @SuppressWarnings("nls")
      @Override
      public void onClick(View v)
      {
        editValue1.setText("");
        editValue2.setText("");
      }
    });
  }

  /**
   * @param value
   * @return
   */
  private String getConvertedValue(double value, boolean reverse)
  {
    int selectedItemPosition1 = this.spinnerUnit1.getSelectedItemPosition();
    int selectedItemPosition2 = this.spinnerUnit2.getSelectedItemPosition();
    String[] items =
      this.getResources().getStringArray(R.array.currency_units_values);
    String selectedItemValue1 = items[selectedItemPosition1];
    String selectedItemValue2 = items[selectedItemPosition2];

    if (reverse)
    {
      String tmp = selectedItemValue1;
      selectedItemValue1 = selectedItemValue2;
      selectedItemValue2 = tmp;
    }

    Double newValue = value;

    HashMap<String, Double> mapForCurrency =
      this.conversionRates.get(selectedItemValue1);
    if (mapForCurrency != null)
    {
      Double conversionFactor = mapForCurrency.get(selectedItemValue2);
      if (conversionFactor != null)
      {
        newValue *= conversionFactor;
      }
    }

    return newValue.toString();
  }

  /*
   * (non-Javadoc)
   *
   * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)
   */
  /*
   * (non-Javadoc)
   *
   * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)
   */
  @Override
  public boolean onCreateOptionsMenu(Menu menu)
  {
    MenuInflater inflater = this.getMenuInflater();
    inflater.inflate(R.menu.options, menu);
    return true;
  }

  /*
   * (non-Javadoc)
   *
   * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)
   */
  /*
   * (non-Javadoc)
   *
   * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)
   */
  @Override
  public boolean onOptionsItemSelected(MenuItem item)
  {
    /* update here */
    return super.onOptionsItemSelected(item);
  }
}
 

Rev 12	Rev 13
1	package de.pointedears.converter.app;	1	package de.pointedears.converter.app;
2		2
3	import java.util.HashMap;	3	import java.util.HashMap;
4		4
5	import android.app.Activity;	5	import android.app.Activity;
6	import android.os.Bundle;	6	import android.os.Bundle;
7	import android.text.Editable;	7	import android.text.Editable;
8	import android.view.KeyEvent;	8	import android.view.KeyEvent;
9	import android.view.Menu;	9	import android.view.Menu;
10	import android.view.MenuInflater;	10	import android.view.MenuInflater;
11	import android.view.MenuItem;	11	import android.view.MenuItem;
12	import android.view.View;	12	import android.view.View;
-		13	import android.view.View.OnClickListener;
13	import android.view.View.OnKeyListener;	14	import android.view.View.OnKeyListener;
14	import android.widget.AdapterView;	15	import android.widget.AdapterView;
15	import android.widget.AdapterView.OnItemSelectedListener;	16	import android.widget.AdapterView.OnItemSelectedListener;
-		17	import android.widget.Button;
16	import android.widget.EditText;	18	import android.widget.EditText;
17	import android.widget.Spinner;	19	import android.widget.Spinner;
18	import de.pointedears.converter.R;	20	import de.pointedears.converter.R;
19	import de.pointedears.converter.db.CurrenciesDatabase;	21	import de.pointedears.converter.db.CurrenciesDatabase;
20		22
21	/**	23	/**
22	* Activity that implements currency conversion	24	* Activity that implements currency conversion
23	*	25	*
24	* @author pelinux	26	* @author pelinux
25	*/	27	*/
26	public class CurrenciesActivity extends Activity	28	public class CurrenciesActivity extends Activity
27	{	29	{
28	/*	30	/*
29	* Constants for mapping value strings	31	* Constants for mapping value strings
30	*	32	*
31	* @todo: Use resource IDs	33	* @todo: Use resource IDs
32	*/	34	*/
33	/**	35	/**
34	* Database field/spinner value for Swiss Francs	36	* Database field/spinner value for Swiss Francs
35	*/	37	*/
36	public static final String VALUE_CHF = "CHF"; //$NON-NLS-1$	38	public static final String VALUE_CHF = "CHF"; //$NON-NLS-1$
37		39
38	/**	40	/**
39	* Database field/spinner value for Euros	41	* Database field/spinner value for Euros
40	*/	42	*/
41		43
42	public static final String VALUE_EUR = "EUR"; //$NON-NLS-1$	44	public static final String VALUE_EUR = "EUR"; //$NON-NLS-1$
43		45
44	/**	46	/**
45	* Database field/spinner value for US Dollars	47	* Database field/spinner value for US Dollars
46	*/	48	*/
47	public static final String VALUE_USD = "USD"; //$NON-NLS-1$	49	public static final String VALUE_USD = "USD"; //$NON-NLS-1$
48		50
49	/* Unit spinners (dropdowns) */	51	/* Unit spinners (dropdowns) */
50	private Spinner spinnerUnit1;	52	private Spinner spinnerUnit1;
51	private Spinner spinnerUnit2;	53	private Spinner spinnerUnit2;
52	private CurrenciesDatabase db;	54	private CurrenciesDatabase db;
53		55
54	private HashMap<String, HashMap<String, Double>> conversionRates;	56	private HashMap<String, HashMap<String, Double>> conversionRates;
55		57
56	/** Called when the activity is first created. */	58	/** Called when the activity is first created. */
57		59
58	@Override	60	@Override
59	public void onCreate(Bundle savedInstanceState)	61	public void onCreate(Bundle savedInstanceState)
60	{	62	{
61	super.onCreate(savedInstanceState);	63	super.onCreate(savedInstanceState);
62	this.setContentView(R.layout.activity_currencies);	64	this.setContentView(R.layout.activity_currencies);
63		65
64	/* Set up currency database, and retrieve conversion rates */	66	/* Set up currency database, and retrieve conversion rates */
65	this.db = new CurrenciesDatabase(this);	67	this.db = new CurrenciesDatabase(this);
66	this.conversionRates = this.db.getConversionRates();	68	this.conversionRates = this.db.getConversionRates();
67		69
68	final EditText editValue1 =	70	final EditText editValue1 =
69	(EditText) this.findViewById(R.id.currencies_edit_value1);	71	(EditText) this.findViewById(R.id.currencies_edit_value1);
70	final EditText editValue2 =	72	final EditText editValue2 =
71	(EditText) this.findViewById(R.id.currencies_edit_value2);	73	(EditText) this.findViewById(R.id.currencies_edit_value2);
72		74
73	final OnKeyListener editValue1OnKey = new OnKeyListener() {	75	final OnKeyListener editValue1OnKey = new OnKeyListener() {
74	@Override	76	@Override
75	public boolean onKey(View v, int keyCode, KeyEvent event)	77	public boolean onKey(View v, int keyCode, KeyEvent event)
76	{	78	{
77	Editable editable1 = ((EditText) v).getText();	79	Editable editable1 = ((EditText) v).getText();
78		80
79	Double value1;	81	Double value1;
80	try	82	try
81	{	83	{
82	value1 = Double.parseDouble(editable1.toString());	84	value1 = Double.parseDouble(editable1.toString());
83	}	85	}
84	catch (NumberFormatException e)	86	catch (NumberFormatException e)
85	{	87	{
86	value1 = null;	88	value1 = null;
87	}	89	}
88		90
89	String string2 = ""; //$NON-NLS-1$	91	String string2 = ""; //$NON-NLS-1$
90	if (value1 != null)	92	if (value1 != null)
91	{	93	{
92	string2 = CurrenciesActivity.this.getConvertedValue(value1, false);	94	string2 = CurrenciesActivity.this.getConvertedValue(value1, false);
93	}	95	}
94		96
95	editValue2.setText(string2);	97	editValue2.setText(string2);
96		98
97	return false;	99	return false;
98	}	100	}
99	};	101	};
100	editValue1.setOnKeyListener(editValue1OnKey);	102	editValue1.setOnKeyListener(editValue1OnKey);
101		103
102	final OnKeyListener editValue2OnKey = new OnKeyListener() {	104	final OnKeyListener editValue2OnKey = new OnKeyListener() {
103	@Override	105	@Override
104	public boolean onKey(View v, int keyCode, KeyEvent event)	106	public boolean onKey(View v, int keyCode, KeyEvent event)
105	{	107	{
106	Editable editable2 = ((EditText) v).getText();	108	Editable editable2 = ((EditText) v).getText();
107		109
108	Double value2;	110	Double value2;
109	try	111	try
110	{	112	{
111	value2 = Double.parseDouble(editable2.toString());	113	value2 = Double.parseDouble(editable2.toString());
112	}	114	}
113	catch (NumberFormatException e)	115	catch (NumberFormatException e)
114	{	116	{
115	value2 = null;	117	value2 = null;
116	}	118	}
117		119
118	String string1 = ""; //$NON-NLS-1$	120	String string1 = ""; //$NON-NLS-1$
119	if (value2 != null)	121	if (value2 != null)
120	{	122	{
121	string1 = CurrenciesActivity.this.getConvertedValue(value2, true);	123	string1 = CurrenciesActivity.this.getConvertedValue(value2, true);
122	}	124	}
123		125
124	editValue1.setText(string1);	126	editValue1.setText(string1);
125		127
126	return false;	128	return false;
127	}	129	}
128	};	130	};
129	editValue2.setOnKeyListener(editValue2OnKey);	131	editValue2.setOnKeyListener(editValue2OnKey);
130		132
131	this.spinnerUnit1 =	133	this.spinnerUnit1 =
132	(Spinner) this.findViewById(R.id.currencies_spinner_unit1);	134	(Spinner) this.findViewById(R.id.currencies_spinner_unit1);
133	this.spinnerUnit2 =	135	this.spinnerUnit2 =
134	(Spinner) this.findViewById(R.id.currencies_spinner_unit2);	136	(Spinner) this.findViewById(R.id.currencies_spinner_unit2);
135		137
136	this.spinnerUnit1.setOnItemSelectedListener(new OnItemSelectedListener() {	138	this.spinnerUnit1.setOnItemSelectedListener(new OnItemSelectedListener() {
137	@Override	139	@Override
138	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,	140	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
139	long arg3)	141	long arg3)
140	{	142	{
141	/* Simulate input in second EditText so that first EditText is updated */	143	/* Simulate input in second EditText so that first EditText is updated */
142	editValue2OnKey.onKey(editValue2, 0, null);	144	editValue2OnKey.onKey(editValue2, 0, null);
143	}	145	}
144		146
145	@Override	147	@Override
146	public void onNothingSelected(AdapterView<?> arg0)	148	public void onNothingSelected(AdapterView<?> arg0)
147	{	149	{
148	/* no-op */	150	/* no-op */
149	}	151	}
150	});	152	});
151		153
152	this.spinnerUnit2.setSelection(1);	154	this.spinnerUnit2.setSelection(1);
153	this.spinnerUnit2.setOnItemSelectedListener(new OnItemSelectedListener() {	155	this.spinnerUnit2.setOnItemSelectedListener(new OnItemSelectedListener() {
154	@Override	156	@Override
155	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,	157	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
156	long arg3)	158	long arg3)
157	{	159	{
158	/* Simulate input in first EditText so that second EditText is updated */	160	/* Simulate input in first EditText so that second EditText is updated */
159	editValue1OnKey.onKey(editValue1, 0, null);	161	editValue1OnKey.onKey(editValue1, 0, null);
160	}	162	}
161		163
162	@Override	164	@Override
163	public void onNothingSelected(AdapterView<?> arg0)	165	public void onNothingSelected(AdapterView<?> arg0)
164	{	166	{
165	/* no-op */	167	/* no-op */
166	}	168	}
-		169	});
-		170
-		171	Button buttonClear =
-		172	(Button) this.findViewById(R.id.currencies_button_clear);
-		173	buttonClear.setOnClickListener(new OnClickListener() {
-		174
-		175	@SuppressWarnings("nls")
-		176	@Override
-		177	public void onClick(View v)
-		178	{
-		179	editValue1.setText("");
-		180	editValue2.setText("");
-		181	}
167	});	182	});
168	}	183	}
169		184
170	/**	185	/**
171	* @param value	186	* @param value
172	* @return	187	* @return
173	*/	188	*/
174	private String getConvertedValue(double value, boolean reverse)	189	private String getConvertedValue(double value, boolean reverse)
175	{	190	{
176	int selectedItemPosition1 = this.spinnerUnit1.getSelectedItemPosition();	191	int selectedItemPosition1 = this.spinnerUnit1.getSelectedItemPosition();
177	int selectedItemPosition2 = this.spinnerUnit2.getSelectedItemPosition();	192	int selectedItemPosition2 = this.spinnerUnit2.getSelectedItemPosition();
178	String[] items =	193	String[] items =
179	this.getResources().getStringArray(R.array.currency_units_values);	194	this.getResources().getStringArray(R.array.currency_units_values);
180	String selectedItemValue1 = items[selectedItemPosition1];	195	String selectedItemValue1 = items[selectedItemPosition1];
181	String selectedItemValue2 = items[selectedItemPosition2];	196	String selectedItemValue2 = items[selectedItemPosition2];
182		197
183	if (reverse)	198	if (reverse)
184	{	199	{
185	String tmp = selectedItemValue1;	200	String tmp = selectedItemValue1;
186	selectedItemValue1 = selectedItemValue2;	201	selectedItemValue1 = selectedItemValue2;
187	selectedItemValue2 = tmp;	202	selectedItemValue2 = tmp;
188	}	203	}
189		204
190	Double newValue = value;	205	Double newValue = value;
191		206
192	HashMap<String, Double> mapForCurrency =	207	HashMap<String, Double> mapForCurrency =
193	this.conversionRates.get(selectedItemValue1);	208	this.conversionRates.get(selectedItemValue1);
194	if (mapForCurrency != null)	209	if (mapForCurrency != null)
195	{	210	{
196	Double conversionFactor = mapForCurrency.get(selectedItemValue2);	211	Double conversionFactor = mapForCurrency.get(selectedItemValue2);
197	if (conversionFactor != null)	212	if (conversionFactor != null)
198	{	213	{
199	newValue *= conversionFactor;	214	newValue *= conversionFactor;
200	}	215	}
201	}	216	}
202		217
203	return newValue.toString();	218	return newValue.toString();
204	}	219	}
205		220
206	/*	221	/*
207	* (non-Javadoc)	222	* (non-Javadoc)
208	*	223	*
209	* @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)	224	* @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)
210	*/	225	*/
211	/*	226	/*
212	* (non-Javadoc)	227	* (non-Javadoc)
213	*	228	*
214	* @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)	229	* @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)
215	*/	230	*/
216	@Override	231	@Override
217	public boolean onCreateOptionsMenu(Menu menu)	232	public boolean onCreateOptionsMenu(Menu menu)
218	{	233	{
219	MenuInflater inflater = this.getMenuInflater();	234	MenuInflater inflater = this.getMenuInflater();
220	inflater.inflate(R.menu.options, menu);	235	inflater.inflate(R.menu.options, menu);
221	return true;	236	return true;
222	}	237	}
223		238
224	/*	239	/*
225	* (non-Javadoc)	240	* (non-Javadoc)
226	*	241	*
227	* @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)	242	* @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)
228	*/	243	*/
229	/*	244	/*
230	* (non-Javadoc)	245	* (non-Javadoc)
231	*	246	*
232	* @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)	247	* @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)
233	*/	248	*/
234	@Override	249	@Override
235	public boolean onOptionsItemSelected(MenuItem item)	250	public boolean onOptionsItemSelected(MenuItem item)
236	{	251	{
237	/* update here */	252	/* update here */
238	return super.onOptionsItemSelected(item);	253	return super.onOptionsItemSelected(item);
239	}	254	}
240	}	255	}
241		256

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(root)/trunk/src/de/pointedears/converter/app/CurrenciesActivity.java - Rev 12 → 13