WebSVN - ES - Diff - Rev 13 and 14 - /trunk/src/de/pointedears/converter/app/CurrenciesActivity.java


package de.pointedears.converter.app;

import java.util.HashMap;
import java.util.Map.Entry;

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 android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
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();
    this.fillTableRates();

    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("");
      }
    });
  }

  /**
   * Fills the table with currency conversion rates
   */
  private void fillTableRates()
  {
    TableLayout tableRates =
      (TableLayout) this.findViewById(R.id.currencies_table_rates);

    for (String key : this.conversionRates.keySet())
    {
      for (Entry<String, Double> factorEntry : this.conversionRates.get(key)
        .entrySet())
      {
        TableRow row = new TableRow(this);

        TextView columnCurrency1 = new TextView(this);
        columnCurrency1.setText(key);
        row.addView(columnCurrency1);

        TextView columnCurrency2 = new TextView(this);
        columnCurrency2.setText(factorEntry.getKey());
        row.addView(columnCurrency2);

        TextView columnRate = new TextView(this);
        columnRate.setText(factorEntry.getValue().toString());
        row.addView(columnRate);

        tableRates.addView(row);
      }
    }
  }

  /**
   * @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 13	Rev 14
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	import java.util.Map.Entry;
4		5
5	import android.app.Activity;	6	import android.app.Activity;
6	import android.os.Bundle;	7	import android.os.Bundle;
7	import android.text.Editable;	8	import android.text.Editable;
8	import android.view.KeyEvent;	9	import android.view.KeyEvent;
9	import android.view.Menu;	10	import android.view.Menu;
10	import android.view.MenuInflater;	11	import android.view.MenuInflater;
11	import android.view.MenuItem;	12	import android.view.MenuItem;
12	import android.view.View;	13	import android.view.View;
13	import android.view.View.OnClickListener;	14	import android.view.View.OnClickListener;
14	import android.view.View.OnKeyListener;	15	import android.view.View.OnKeyListener;
15	import android.widget.AdapterView;	16	import android.widget.AdapterView;
16	import android.widget.AdapterView.OnItemSelectedListener;	17	import android.widget.AdapterView.OnItemSelectedListener;
17	import android.widget.Button;	18	import android.widget.Button;
18	import android.widget.EditText;	19	import android.widget.EditText;
19	import android.widget.Spinner;	20	import android.widget.Spinner;
-		21	import android.widget.TableLayout;
-		22	import android.widget.TableRow;
-		23	import android.widget.TextView;
20	import de.pointedears.converter.R;	24	import de.pointedears.converter.R;
21	import de.pointedears.converter.db.CurrenciesDatabase;	25	import de.pointedears.converter.db.CurrenciesDatabase;
22		26
23	/**	27	/**
24	* Activity that implements currency conversion	28	* Activity that implements currency conversion
25	*	29	*
26	* @author pelinux	30	* @author pelinux
27	*/	31	*/
28	public class CurrenciesActivity extends Activity	32	public class CurrenciesActivity extends Activity
29	{	33	{
30	/*	34	/*
31	* Constants for mapping value strings	35	* Constants for mapping value strings
32	*	36	*
33	* @todo: Use resource IDs	37	* @todo: Use resource IDs
34	*/	38	*/
35	/**	39	/**
36	* Database field/spinner value for Swiss Francs	40	* Database field/spinner value for Swiss Francs
37	*/	41	*/
38	public static final String VALUE_CHF = "CHF"; //$NON-NLS-1$	42	public static final String VALUE_CHF = "CHF"; //$NON-NLS-1$
39		43
40	/**	44	/**
41	* Database field/spinner value for Euros	45	* Database field/spinner value for Euros
42	*/	46	*/
43		47
44	public static final String VALUE_EUR = "EUR"; //$NON-NLS-1$	48	public static final String VALUE_EUR = "EUR"; //$NON-NLS-1$
45		49
46	/**	50	/**
47	* Database field/spinner value for US Dollars	51	* Database field/spinner value for US Dollars
48	*/	52	*/
49	public static final String VALUE_USD = "USD"; //$NON-NLS-1$	53	public static final String VALUE_USD = "USD"; //$NON-NLS-1$
50		54
51	/* Unit spinners (dropdowns) */	55	/* Unit spinners (dropdowns) */
52	private Spinner spinnerUnit1;	56	private Spinner spinnerUnit1;
53	private Spinner spinnerUnit2;	57	private Spinner spinnerUnit2;
54	private CurrenciesDatabase db;	58	private CurrenciesDatabase db;
55		59
56	private HashMap<String, HashMap<String, Double>> conversionRates;	60	private HashMap<String, HashMap<String, Double>> conversionRates;
57		61
58	/** Called when the activity is first created. */	62	/** Called when the activity is first created. */
59		63
60	@Override	64	@Override
61	public void onCreate(Bundle savedInstanceState)	65	public void onCreate(Bundle savedInstanceState)
62	{	66	{
63	super.onCreate(savedInstanceState);	67	super.onCreate(savedInstanceState);
64	this.setContentView(R.layout.activity_currencies);	68	this.setContentView(R.layout.activity_currencies);
65		69
66	/* Set up currency database, and retrieve conversion rates */	70	/* Set up currency database, and retrieve conversion rates */
67	this.db = new CurrenciesDatabase(this);	71	this.db = new CurrenciesDatabase(this);
68	this.conversionRates = this.db.getConversionRates();	72	this.conversionRates = this.db.getConversionRates();
-		73	this.fillTableRates();
69		74
70	final EditText editValue1 =	75	final EditText editValue1 =
71	(EditText) this.findViewById(R.id.currencies_edit_value1);	76	(EditText) this.findViewById(R.id.currencies_edit_value1);
72	final EditText editValue2 =	77	final EditText editValue2 =
73	(EditText) this.findViewById(R.id.currencies_edit_value2);	78	(EditText) this.findViewById(R.id.currencies_edit_value2);
74		79
75	final OnKeyListener editValue1OnKey = new OnKeyListener() {	80	final OnKeyListener editValue1OnKey = new OnKeyListener() {
76	@Override	81	@Override
77	public boolean onKey(View v, int keyCode, KeyEvent event)	82	public boolean onKey(View v, int keyCode, KeyEvent event)
78	{	83	{
79	Editable editable1 = ((EditText) v).getText();	84	Editable editable1 = ((EditText) v).getText();
80		85
81	Double value1;	86	Double value1;
82	try	87	try
83	{	88	{
84	value1 = Double.parseDouble(editable1.toString());	89	value1 = Double.parseDouble(editable1.toString());
85	}	90	}
86	catch (NumberFormatException e)	91	catch (NumberFormatException e)
87	{	92	{
88	value1 = null;	93	value1 = null;
89	}	94	}
90		95
91	String string2 = ""; //$NON-NLS-1$	96	String string2 = ""; //$NON-NLS-1$
92	if (value1 != null)	97	if (value1 != null)
93	{	98	{
94	string2 = CurrenciesActivity.this.getConvertedValue(value1, false);	99	string2 = CurrenciesActivity.this.getConvertedValue(value1, false);
95	}	100	}
96		101
97	editValue2.setText(string2);	102	editValue2.setText(string2);
98		103
99	return false;	104	return false;
100	}	105	}
101	};	106	};
102	editValue1.setOnKeyListener(editValue1OnKey);	107	editValue1.setOnKeyListener(editValue1OnKey);
103		108
104	final OnKeyListener editValue2OnKey = new OnKeyListener() {	109	final OnKeyListener editValue2OnKey = new OnKeyListener() {
105	@Override	110	@Override
106	public boolean onKey(View v, int keyCode, KeyEvent event)	111	public boolean onKey(View v, int keyCode, KeyEvent event)
107	{	112	{
108	Editable editable2 = ((EditText) v).getText();	113	Editable editable2 = ((EditText) v).getText();
109		114
110	Double value2;	115	Double value2;
111	try	116	try
112	{	117	{
113	value2 = Double.parseDouble(editable2.toString());	118	value2 = Double.parseDouble(editable2.toString());
114	}	119	}
115	catch (NumberFormatException e)	120	catch (NumberFormatException e)
116	{	121	{
117	value2 = null;	122	value2 = null;
118	}	123	}
119		124
120	String string1 = ""; //$NON-NLS-1$	125	String string1 = ""; //$NON-NLS-1$
121	if (value2 != null)	126	if (value2 != null)
122	{	127	{
123	string1 = CurrenciesActivity.this.getConvertedValue(value2, true);	128	string1 = CurrenciesActivity.this.getConvertedValue(value2, true);
124	}	129	}
125		130
126	editValue1.setText(string1);	131	editValue1.setText(string1);
127		132
128	return false;	133	return false;
129	}	134	}
130	};	135	};
131	editValue2.setOnKeyListener(editValue2OnKey);	136	editValue2.setOnKeyListener(editValue2OnKey);
132		137
133	this.spinnerUnit1 =	138	this.spinnerUnit1 =
134	(Spinner) this.findViewById(R.id.currencies_spinner_unit1);	139	(Spinner) this.findViewById(R.id.currencies_spinner_unit1);
135	this.spinnerUnit2 =	140	this.spinnerUnit2 =
136	(Spinner) this.findViewById(R.id.currencies_spinner_unit2);	141	(Spinner) this.findViewById(R.id.currencies_spinner_unit2);
137		142
138	this.spinnerUnit1.setOnItemSelectedListener(new OnItemSelectedListener() {	143	this.spinnerUnit1.setOnItemSelectedListener(new OnItemSelectedListener() {
139	@Override	144	@Override
140	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,	145	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
141	long arg3)	146	long arg3)
142	{	147	{
143	/* Simulate input in second EditText so that first EditText is updated */	148	/* Simulate input in second EditText so that first EditText is updated */
144	editValue2OnKey.onKey(editValue2, 0, null);	149	editValue2OnKey.onKey(editValue2, 0, null);
145	}	150	}
146		151
147	@Override	152	@Override
148	public void onNothingSelected(AdapterView<?> arg0)	153	public void onNothingSelected(AdapterView<?> arg0)
149	{	154	{
150	/* no-op */	155	/* no-op */
151	}	156	}
152	});	157	});
153		158
154	this.spinnerUnit2.setSelection(1);	159	this.spinnerUnit2.setSelection(1);
155	this.spinnerUnit2.setOnItemSelectedListener(new OnItemSelectedListener() {	160	this.spinnerUnit2.setOnItemSelectedListener(new OnItemSelectedListener() {
156	@Override	161	@Override
157	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,	162	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
158	long arg3)	163	long arg3)
159	{	164	{
160	/* Simulate input in first EditText so that second EditText is updated */	165	/* Simulate input in first EditText so that second EditText is updated */
161	editValue1OnKey.onKey(editValue1, 0, null);	166	editValue1OnKey.onKey(editValue1, 0, null);
162	}	167	}
163		168
164	@Override	169	@Override
165	public void onNothingSelected(AdapterView<?> arg0)	170	public void onNothingSelected(AdapterView<?> arg0)
166	{	171	{
167	/* no-op */	172	/* no-op */
168	}	173	}
169	});	174	});
170		175
171	Button buttonClear =	176	Button buttonClear =
172	(Button) this.findViewById(R.id.currencies_button_clear);	177	(Button) this.findViewById(R.id.currencies_button_clear);
173	buttonClear.setOnClickListener(new OnClickListener() {	178	buttonClear.setOnClickListener(new OnClickListener() {
174		179
175	@SuppressWarnings("nls")	180	@SuppressWarnings("nls")
176	@Override	181	@Override
177	public void onClick(View v)	182	public void onClick(View v)
178	{	183	{
179	editValue1.setText("");	184	editValue1.setText("");
180	editValue2.setText("");	185	editValue2.setText("");
181	}	186	}
182	});	187	});
183	}	188	}
-		189
-		190	/**
-		191	* Fills the table with currency conversion rates
-		192	*/
-		193	private void fillTableRates()
-		194	{
-		195	TableLayout tableRates =
-		196	(TableLayout) this.findViewById(R.id.currencies_table_rates);
-		197
-		198	for (String key : this.conversionRates.keySet())
-		199	{
-		200	for (Entry<String, Double> factorEntry : this.conversionRates.get(key)
-		201	.entrySet())
-		202	{
-		203	TableRow row = new TableRow(this);
-		204
-		205	TextView columnCurrency1 = new TextView(this);
-		206	columnCurrency1.setText(key);
-		207	row.addView(columnCurrency1);
-		208
-		209	TextView columnCurrency2 = new TextView(this);
-		210	columnCurrency2.setText(factorEntry.getKey());
-		211	row.addView(columnCurrency2);
-		212
-		213	TextView columnRate = new TextView(this);
-		214	columnRate.setText(factorEntry.getValue().toString());
-		215	row.addView(columnRate);
-		216
-		217	tableRates.addView(row);
-		218	}
-		219	}
-		220	}
184		221
185	/**	222	/**
186	* @param value	223	* @param value
187	* @return	224	* @return
188	*/	225	*/
189	private String getConvertedValue(double value, boolean reverse)	226	private String getConvertedValue(double value, boolean reverse)
190	{	227	{
191	int selectedItemPosition1 = this.spinnerUnit1.getSelectedItemPosition();	228	int selectedItemPosition1 = this.spinnerUnit1.getSelectedItemPosition();
192	int selectedItemPosition2 = this.spinnerUnit2.getSelectedItemPosition();	229	int selectedItemPosition2 = this.spinnerUnit2.getSelectedItemPosition();
193	String[] items =	230	String[] items =
194	this.getResources().getStringArray(R.array.currency_units_values);	231	this.getResources().getStringArray(R.array.currency_units_values);
195	String selectedItemValue1 = items[selectedItemPosition1];	232	String selectedItemValue1 = items[selectedItemPosition1];
196	String selectedItemValue2 = items[selectedItemPosition2];	233	String selectedItemValue2 = items[selectedItemPosition2];
197		234
198	if (reverse)	235	if (reverse)
199	{	236	{
200	String tmp = selectedItemValue1;	237	String tmp = selectedItemValue1;
201	selectedItemValue1 = selectedItemValue2;	238	selectedItemValue1 = selectedItemValue2;
202	selectedItemValue2 = tmp;	239	selectedItemValue2 = tmp;
203	}	240	}
204		241
205	Double newValue = value;	242	Double newValue = value;
206		243
207	HashMap<String, Double> mapForCurrency =	244	HashMap<String, Double> mapForCurrency =
208	this.conversionRates.get(selectedItemValue1);	245	this.conversionRates.get(selectedItemValue1);
209	if (mapForCurrency != null)	246	if (mapForCurrency != null)
210	{	247	{
211	Double conversionFactor = mapForCurrency.get(selectedItemValue2);	248	Double conversionFactor = mapForCurrency.get(selectedItemValue2);
212	if (conversionFactor != null)	249	if (conversionFactor != null)
213	{	250	{
214	newValue *= conversionFactor;	251	newValue *= conversionFactor;
215	}	252	}
216	}	253	}
217		254
218	return newValue.toString();	255	return newValue.toString();
219	}	256	}
220		257
221	/*	258	/*
222	* (non-Javadoc)	259	* (non-Javadoc)
223	*	260	*
224	* @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)	261	* @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)
225	*/	262	*/
226	/*	263	/*
227	* (non-Javadoc)	264	* (non-Javadoc)
228	*	265	*
229	* @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)	266	* @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)
230	*/	267	*/
231	@Override	268	@Override
232	public boolean onCreateOptionsMenu(Menu menu)	269	public boolean onCreateOptionsMenu(Menu menu)
233	{	270	{
234	MenuInflater inflater = this.getMenuInflater();	271	MenuInflater inflater = this.getMenuInflater();
235	inflater.inflate(R.menu.options, menu);	272	inflater.inflate(R.menu.options, menu);
236	return true;	273	return true;
237	}	274	}
238		275
239	/*	276	/*
240	* (non-Javadoc)	277	* (non-Javadoc)
241	*	278	*
242	* @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)	279	* @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)
243	*/	280	*/
244	/*	281	/*
245	* (non-Javadoc)	282	* (non-Javadoc)
246	*	283	*
247	* @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)	284	* @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)
248	*/	285	*/
249	@Override	286	@Override
250	public boolean onOptionsItemSelected(MenuItem item)	287	public boolean onOptionsItemSelected(MenuItem item)
251	{	288	{
252	/* update here */	289	/* update here */
253	return super.onOptionsItemSelected(item);	290	return super.onOptionsItemSelected(item);
254	}	291	}
255	}	292	}
256		293

Subversion Repositories ES

(root)/trunk/src/de/pointedears/converter/app/CurrenciesActivity.java - Rev 13 → 14