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