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