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Rev | Author | Line No. | Line |
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8 | PointedEar | 1 | package de.pointedears.converter.app; |
5 | PointedEar | 2 | |
7 | PointedEar | 3 | import java.util.HashMap; |
14 | PointedEar | 4 | import java.util.Map.Entry; |
7 | PointedEar | 5 | |
5 | PointedEar | 6 | import android.app.Activity; |
7 | import android.os.Bundle; |
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7 | PointedEar | 8 | import android.text.Editable; |
9 | import android.view.KeyEvent; |
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8 | PointedEar | 10 | import android.view.Menu; |
11 | import android.view.MenuInflater; |
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12 | import android.view.MenuItem; |
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7 | PointedEar | 13 | import android.view.View; |
13 | PointedEar | 14 | import android.view.View.OnClickListener; |
7 | PointedEar | 15 | import android.view.View.OnKeyListener; |
16 | import android.widget.AdapterView; |
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17 | import android.widget.AdapterView.OnItemSelectedListener; |
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13 | PointedEar | 18 | import android.widget.Button; |
7 | PointedEar | 19 | import android.widget.EditText; |
20 | import android.widget.Spinner; |
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14 | PointedEar | 21 | import android.widget.TableLayout; |
22 | import android.widget.TableRow; |
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23 | import android.widget.TextView; |
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8 | PointedEar | 24 | import de.pointedears.converter.R; |
11 | PointedEar | 25 | import de.pointedears.converter.db.CurrenciesDatabase; |
5 | PointedEar | 26 | |
27 | /** |
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7 | PointedEar | 28 | * Activity that implements currency conversion |
5 | PointedEar | 29 | * |
7 | PointedEar | 30 | * @author pelinux |
5 | PointedEar | 31 | */ |
32 | public class CurrenciesActivity extends Activity |
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33 | { |
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7 | PointedEar | 34 | /* |
8 | PointedEar | 35 | * Constants for mapping value strings |
12 | PointedEar | 36 | * |
37 | * @todo: Use resource IDs |
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7 | PointedEar | 38 | */ |
12 | PointedEar | 39 | /** |
40 | * Database field/spinner value for Swiss Francs |
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41 | */ |
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42 | public static final String VALUE_CHF = "CHF"; //$NON-NLS-1$ |
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7 | PointedEar | 43 | |
12 | PointedEar | 44 | /** |
45 | * Database field/spinner value for Euros |
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46 | */ |
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7 | PointedEar | 47 | |
12 | PointedEar | 48 | public static final String VALUE_EUR = "EUR"; //$NON-NLS-1$ |
49 | |||
50 | /** |
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51 | * Database field/spinner value for US Dollars |
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52 | */ |
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53 | public static final String VALUE_USD = "USD"; //$NON-NLS-1$ |
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54 | |||
7 | PointedEar | 55 | /* Unit spinners (dropdowns) */ |
56 | private Spinner spinnerUnit1; |
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57 | private Spinner spinnerUnit2; |
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12 | PointedEar | 58 | private CurrenciesDatabase db; |
7 | PointedEar | 59 | |
12 | PointedEar | 60 | private HashMap<String, HashMap<String, Double>> conversionRates; |
61 | |||
7 | PointedEar | 62 | /** Called when the activity is first created. */ |
63 | |||
5 | PointedEar | 64 | @Override |
7 | PointedEar | 65 | public void onCreate(Bundle savedInstanceState) |
5 | PointedEar | 66 | { |
67 | super.onCreate(savedInstanceState); |
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7 | PointedEar | 68 | this.setContentView(R.layout.activity_currencies); |
5 | PointedEar | 69 | |
12 | PointedEar | 70 | /* Set up currency database, and retrieve conversion rates */ |
71 | this.db = new CurrenciesDatabase(this); |
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72 | this.conversionRates = this.db.getConversionRates(); |
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14 | PointedEar | 73 | this.fillTableRates(); |
8 | PointedEar | 74 | |
7 | PointedEar | 75 | final EditText editValue1 = |
76 | (EditText) this.findViewById(R.id.currencies_edit_value1); |
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77 | final EditText editValue2 = |
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78 | (EditText) this.findViewById(R.id.currencies_edit_value2); |
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79 | |||
80 | final OnKeyListener editValue1OnKey = new OnKeyListener() { |
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81 | @Override |
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82 | public boolean onKey(View v, int keyCode, KeyEvent event) |
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83 | { |
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84 | Editable editable1 = ((EditText) v).getText(); |
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85 | |||
86 | Double value1; |
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87 | try |
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88 | { |
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89 | value1 = Double.parseDouble(editable1.toString()); |
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90 | } |
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91 | catch (NumberFormatException e) |
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92 | { |
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93 | value1 = null; |
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94 | } |
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95 | |||
96 | String string2 = ""; //$NON-NLS-1$ |
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97 | if (value1 != null) |
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98 | { |
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99 | string2 = CurrenciesActivity.this.getConvertedValue(value1, false); |
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100 | } |
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101 | |||
102 | editValue2.setText(string2); |
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103 | |||
104 | return false; |
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105 | } |
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106 | }; |
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107 | editValue1.setOnKeyListener(editValue1OnKey); |
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108 | |||
109 | final OnKeyListener editValue2OnKey = new OnKeyListener() { |
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110 | @Override |
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111 | public boolean onKey(View v, int keyCode, KeyEvent event) |
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112 | { |
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113 | Editable editable2 = ((EditText) v).getText(); |
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114 | |||
115 | Double value2; |
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116 | try |
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117 | { |
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118 | value2 = Double.parseDouble(editable2.toString()); |
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119 | } |
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120 | catch (NumberFormatException e) |
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121 | { |
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122 | value2 = null; |
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123 | } |
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124 | |||
125 | String string1 = ""; //$NON-NLS-1$ |
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126 | if (value2 != null) |
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127 | { |
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128 | string1 = CurrenciesActivity.this.getConvertedValue(value2, true); |
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129 | } |
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130 | |||
131 | editValue1.setText(string1); |
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132 | |||
133 | return false; |
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134 | } |
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135 | }; |
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136 | editValue2.setOnKeyListener(editValue2OnKey); |
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137 | |||
138 | this.spinnerUnit1 = |
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139 | (Spinner) this.findViewById(R.id.currencies_spinner_unit1); |
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140 | this.spinnerUnit2 = |
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141 | (Spinner) this.findViewById(R.id.currencies_spinner_unit2); |
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142 | |||
143 | this.spinnerUnit1.setOnItemSelectedListener(new OnItemSelectedListener() { |
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144 | @Override |
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145 | public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, |
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146 | long arg3) |
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147 | { |
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148 | /* Simulate input in second EditText so that first EditText is updated */ |
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149 | editValue2OnKey.onKey(editValue2, 0, null); |
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150 | } |
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151 | |||
152 | @Override |
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153 | public void onNothingSelected(AdapterView<?> arg0) |
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154 | { |
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155 | /* no-op */ |
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156 | } |
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157 | }); |
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158 | |||
159 | this.spinnerUnit2.setSelection(1); |
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160 | this.spinnerUnit2.setOnItemSelectedListener(new OnItemSelectedListener() { |
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161 | @Override |
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162 | public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, |
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163 | long arg3) |
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164 | { |
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165 | /* Simulate input in first EditText so that second EditText is updated */ |
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166 | editValue1OnKey.onKey(editValue1, 0, null); |
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167 | } |
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168 | |||
169 | @Override |
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170 | public void onNothingSelected(AdapterView<?> arg0) |
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171 | { |
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172 | /* no-op */ |
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173 | } |
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174 | }); |
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13 | PointedEar | 175 | |
176 | Button buttonClear = |
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177 | (Button) this.findViewById(R.id.currencies_button_clear); |
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178 | buttonClear.setOnClickListener(new OnClickListener() { |
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179 | |||
180 | @SuppressWarnings("nls") |
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181 | @Override |
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182 | public void onClick(View v) |
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183 | { |
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184 | editValue1.setText(""); |
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185 | editValue2.setText(""); |
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186 | } |
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187 | }); |
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5 | PointedEar | 188 | } |
7 | PointedEar | 189 | |
190 | /** |
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14 | PointedEar | 191 | * Fills the table with currency conversion rates |
192 | */ |
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193 | private void fillTableRates() |
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194 | { |
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195 | TableLayout tableRates = |
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196 | (TableLayout) this.findViewById(R.id.currencies_table_rates); |
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197 | |||
198 | for (String key : this.conversionRates.keySet()) |
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199 | { |
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200 | for (Entry<String, Double> factorEntry : this.conversionRates.get(key) |
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201 | .entrySet()) |
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202 | { |
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203 | TableRow row = new TableRow(this); |
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204 | |||
205 | TextView columnCurrency1 = new TextView(this); |
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206 | columnCurrency1.setText(key); |
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207 | row.addView(columnCurrency1); |
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208 | |||
209 | TextView columnCurrency2 = new TextView(this); |
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210 | columnCurrency2.setText(factorEntry.getKey()); |
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211 | row.addView(columnCurrency2); |
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212 | |||
213 | TextView columnRate = new TextView(this); |
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214 | columnRate.setText(factorEntry.getValue().toString()); |
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215 | row.addView(columnRate); |
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216 | |||
217 | tableRates.addView(row); |
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218 | } |
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219 | } |
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220 | } |
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221 | |||
222 | /** |
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7 | PointedEar | 223 | * @param value |
224 | * @return |
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225 | */ |
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226 | private String getConvertedValue(double value, boolean reverse) |
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227 | { |
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228 | int selectedItemPosition1 = this.spinnerUnit1.getSelectedItemPosition(); |
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229 | int selectedItemPosition2 = this.spinnerUnit2.getSelectedItemPosition(); |
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8 | PointedEar | 230 | String[] items = |
7 | PointedEar | 231 | this.getResources().getStringArray(R.array.currency_units_values); |
8 | PointedEar | 232 | String selectedItemValue1 = items[selectedItemPosition1]; |
233 | String selectedItemValue2 = items[selectedItemPosition2]; |
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7 | PointedEar | 234 | |
235 | if (reverse) |
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236 | { |
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237 | String tmp = selectedItemValue1; |
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238 | selectedItemValue1 = selectedItemValue2; |
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239 | selectedItemValue2 = tmp; |
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240 | } |
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241 | |||
242 | Double newValue = value; |
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243 | |||
8 | PointedEar | 244 | HashMap<String, Double> mapForCurrency = |
12 | PointedEar | 245 | this.conversionRates.get(selectedItemValue1); |
8 | PointedEar | 246 | if (mapForCurrency != null) |
7 | PointedEar | 247 | { |
8 | PointedEar | 248 | Double conversionFactor = mapForCurrency.get(selectedItemValue2); |
249 | if (conversionFactor != null) |
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250 | { |
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251 | newValue *= conversionFactor; |
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252 | } |
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7 | PointedEar | 253 | } |
254 | |||
255 | return newValue.toString(); |
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256 | } |
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8 | PointedEar | 257 | |
258 | /* |
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259 | * (non-Javadoc) |
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260 | * |
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261 | * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu) |
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262 | */ |
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12 | PointedEar | 263 | /* |
264 | * (non-Javadoc) |
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265 | * |
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266 | * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu) |
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267 | */ |
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8 | PointedEar | 268 | @Override |
269 | public boolean onCreateOptionsMenu(Menu menu) |
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270 | { |
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271 | MenuInflater inflater = this.getMenuInflater(); |
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272 | inflater.inflate(R.menu.options, menu); |
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273 | return true; |
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274 | } |
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275 | |||
276 | /* |
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277 | * (non-Javadoc) |
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278 | * |
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279 | * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem) |
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280 | */ |
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12 | PointedEar | 281 | /* |
282 | * (non-Javadoc) |
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283 | * |
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284 | * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem) |
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285 | */ |
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8 | PointedEar | 286 | @Override |
287 | public boolean onOptionsItemSelected(MenuItem item) |
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288 | { |
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289 | /* update here */ |
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290 | return super.onOptionsItemSelected(item); |
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291 | } |
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5 | PointedEar | 292 | } |