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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; |
11 | PointedEar | 6 | import android.database.Cursor; |
7 | import android.database.sqlite.SQLiteDatabase; |
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8 | import android.database.sqlite.SQLiteException; |
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5 | PointedEar | 9 | import android.os.Bundle; |
7 | PointedEar | 10 | import android.text.Editable; |
11 | import android.view.KeyEvent; |
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8 | PointedEar | 12 | import android.view.Menu; |
13 | import android.view.MenuInflater; |
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14 | import android.view.MenuItem; |
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7 | PointedEar | 15 | import android.view.View; |
16 | import android.view.View.OnKeyListener; |
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17 | import android.widget.AdapterView; |
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18 | import android.widget.AdapterView.OnItemSelectedListener; |
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19 | import android.widget.EditText; |
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20 | import android.widget.Spinner; |
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8 | PointedEar | 21 | import de.pointedears.converter.R; |
11 | PointedEar | 22 | import de.pointedears.converter.db.CurrenciesDatabase; |
5 | PointedEar | 23 | |
24 | /** |
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7 | PointedEar | 25 | * Activity that implements currency conversion |
5 | PointedEar | 26 | * |
7 | PointedEar | 27 | * @author pelinux |
5 | PointedEar | 28 | */ |
29 | public class CurrenciesActivity extends Activity |
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30 | { |
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7 | PointedEar | 31 | /* |
8 | PointedEar | 32 | * Constants for mapping value strings |
7 | PointedEar | 33 | */ |
34 | private static final String VALUE_CHF = "CHF"; //$NON-NLS-1$ |
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35 | private static final String VALUE_EUR = "EUR"; //$NON-NLS-1$ |
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36 | private static final String VALUE_USD = "USD"; //$NON-NLS-1$ |
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37 | |||
11 | PointedEar | 38 | protected static HashMap<String, HashMap<String, Double>> currencyConversions; |
7 | PointedEar | 39 | |
40 | /* Unit spinners (dropdowns) */ |
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41 | private Spinner spinnerUnit1; |
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42 | private Spinner spinnerUnit2; |
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43 | |||
44 | /** Called when the activity is first created. */ |
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45 | |||
5 | PointedEar | 46 | @Override |
7 | PointedEar | 47 | public void onCreate(Bundle savedInstanceState) |
5 | PointedEar | 48 | { |
49 | super.onCreate(savedInstanceState); |
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7 | PointedEar | 50 | this.setContentView(R.layout.activity_currencies); |
5 | PointedEar | 51 | |
11 | PointedEar | 52 | /* Set up currency database */ |
8 | PointedEar | 53 | CurrenciesActivity.currencyConversions = |
54 | new HashMap<String, HashMap<String, Double>>(); |
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55 | |||
56 | HashMap<String, Double> conversionFactors = new HashMap<String, Double>(); |
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57 | conversionFactors.put(CurrenciesActivity.VALUE_EUR, 0.767842293); |
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58 | conversionFactors.put(CurrenciesActivity.VALUE_USD, 1.03413); |
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59 | CurrenciesActivity.currencyConversions.put(CurrenciesActivity.VALUE_CHF, |
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60 | conversionFactors); |
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61 | |||
62 | conversionFactors = new HashMap<String, Double>(); |
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63 | conversionFactors.put(CurrenciesActivity.VALUE_CHF, 1.30235077); |
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11 | PointedEar | 64 | conversionFactors.put(CurrenciesActivity.VALUE_USD, 1.3468); |
8 | PointedEar | 65 | CurrenciesActivity.currencyConversions.put(CurrenciesActivity.VALUE_EUR, |
66 | conversionFactors); |
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67 | |||
68 | conversionFactors = new HashMap<String, Double>(); |
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69 | conversionFactors.put(CurrenciesActivity.VALUE_CHF, 0.966996412); |
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70 | conversionFactors.put(CurrenciesActivity.VALUE_EUR, 0.742500743); |
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71 | CurrenciesActivity.currencyConversions.put(CurrenciesActivity.VALUE_USD, |
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72 | conversionFactors); |
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73 | |||
11 | PointedEar | 74 | /* Create database with values above if it does not exist */ |
75 | CurrenciesDatabase db = new CurrenciesDatabase(this); |
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76 | try |
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77 | { |
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78 | SQLiteDatabase dbConn = db.getReadableDatabase(); |
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79 | |||
80 | @SuppressWarnings("nls") |
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81 | Cursor myCursor = |
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82 | dbConn.query(true, CurrenciesDatabase.TABLE, null, null, null, null, |
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83 | null, CurrenciesDatabase.COLUMN_CURRENCY1 + "," |
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84 | + CurrenciesDatabase.COLUMN_CURRENCY2, null); |
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85 | |||
86 | @SuppressWarnings({ "unused", "nls" }) |
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87 | String queryResult = ""; |
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88 | if (myCursor != null) |
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89 | { |
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90 | try |
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91 | { |
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92 | int currency1Id = |
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93 | myCursor |
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94 | .getColumnIndexOrThrow(CurrenciesDatabase.COLUMN_CURRENCY1); |
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95 | int currency2Id = |
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96 | myCursor |
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97 | .getColumnIndexOrThrow(CurrenciesDatabase.COLUMN_CURRENCY2); |
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98 | int factorId = |
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99 | myCursor.getColumnIndexOrThrow(CurrenciesDatabase.COLUMN_FACTOR); |
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100 | |||
101 | if (myCursor.moveToFirst()) |
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102 | { |
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103 | do |
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104 | { |
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105 | String currency1Str = myCursor.getString(currency1Id); |
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106 | String currency2Str = myCursor.getString(currency2Id); |
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107 | Double factor = myCursor.getDouble(factorId); |
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108 | |||
109 | /* DEBUG */ |
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110 | queryResult += |
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111 | currency1Str + " --> " + currency2Str + ": " + factor + "\n"; |
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112 | } |
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113 | while (myCursor.moveToNext()); |
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114 | } |
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115 | } |
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116 | catch (IllegalArgumentException e) |
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117 | { |
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118 | /* Could not retrieve column index */ |
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119 | e.printStackTrace(); |
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120 | } |
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121 | } |
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122 | |||
123 | /* TODO: Close only on exit */ |
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124 | dbConn.close(); |
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125 | } |
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126 | catch (SQLiteException e1) |
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127 | { |
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128 | /* Could not open database */ |
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129 | e1.printStackTrace(); |
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130 | } |
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131 | |||
7 | PointedEar | 132 | final EditText editValue1 = |
133 | (EditText) this.findViewById(R.id.currencies_edit_value1); |
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134 | final EditText editValue2 = |
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135 | (EditText) this.findViewById(R.id.currencies_edit_value2); |
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136 | |||
137 | final OnKeyListener editValue1OnKey = new OnKeyListener() { |
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138 | @Override |
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139 | public boolean onKey(View v, int keyCode, KeyEvent event) |
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140 | { |
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141 | Editable editable1 = ((EditText) v).getText(); |
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142 | |||
143 | Double value1; |
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144 | try |
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145 | { |
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146 | value1 = Double.parseDouble(editable1.toString()); |
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147 | } |
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148 | catch (NumberFormatException e) |
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149 | { |
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150 | value1 = null; |
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151 | } |
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152 | |||
153 | String string2 = ""; //$NON-NLS-1$ |
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154 | if (value1 != null) |
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155 | { |
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156 | string2 = CurrenciesActivity.this.getConvertedValue(value1, false); |
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157 | } |
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158 | |||
159 | editValue2.setText(string2); |
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160 | |||
161 | return false; |
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162 | } |
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163 | }; |
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164 | editValue1.setOnKeyListener(editValue1OnKey); |
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165 | |||
166 | final OnKeyListener editValue2OnKey = new OnKeyListener() { |
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167 | @Override |
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168 | public boolean onKey(View v, int keyCode, KeyEvent event) |
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169 | { |
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170 | Editable editable2 = ((EditText) v).getText(); |
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171 | |||
172 | Double value2; |
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173 | try |
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174 | { |
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175 | value2 = Double.parseDouble(editable2.toString()); |
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176 | } |
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177 | catch (NumberFormatException e) |
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178 | { |
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179 | value2 = null; |
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180 | } |
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181 | |||
182 | String string1 = ""; //$NON-NLS-1$ |
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183 | if (value2 != null) |
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184 | { |
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185 | string1 = CurrenciesActivity.this.getConvertedValue(value2, true); |
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186 | } |
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187 | |||
188 | editValue1.setText(string1); |
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189 | |||
190 | return false; |
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191 | } |
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192 | }; |
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193 | editValue2.setOnKeyListener(editValue2OnKey); |
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194 | |||
195 | this.spinnerUnit1 = |
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196 | (Spinner) this.findViewById(R.id.currencies_spinner_unit1); |
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197 | this.spinnerUnit2 = |
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198 | (Spinner) this.findViewById(R.id.currencies_spinner_unit2); |
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199 | |||
200 | this.spinnerUnit1.setOnItemSelectedListener(new OnItemSelectedListener() { |
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201 | @Override |
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202 | public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, |
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203 | long arg3) |
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204 | { |
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205 | /* Simulate input in second EditText so that first EditText is updated */ |
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206 | editValue2OnKey.onKey(editValue2, 0, null); |
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207 | } |
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208 | |||
209 | @Override |
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210 | public void onNothingSelected(AdapterView<?> arg0) |
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211 | { |
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212 | /* no-op */ |
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213 | } |
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214 | }); |
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215 | |||
216 | this.spinnerUnit2.setSelection(1); |
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217 | this.spinnerUnit2.setOnItemSelectedListener(new OnItemSelectedListener() { |
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218 | @Override |
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219 | public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, |
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220 | long arg3) |
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221 | { |
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222 | /* Simulate input in first EditText so that second EditText is updated */ |
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223 | editValue1OnKey.onKey(editValue1, 0, null); |
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224 | } |
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225 | |||
226 | @Override |
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227 | public void onNothingSelected(AdapterView<?> arg0) |
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228 | { |
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229 | /* no-op */ |
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230 | } |
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231 | }); |
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5 | PointedEar | 232 | } |
7 | PointedEar | 233 | |
234 | /** |
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235 | * @param value |
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236 | * @return |
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237 | */ |
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238 | private String getConvertedValue(double value, boolean reverse) |
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239 | { |
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240 | int selectedItemPosition1 = this.spinnerUnit1.getSelectedItemPosition(); |
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241 | int selectedItemPosition2 = this.spinnerUnit2.getSelectedItemPosition(); |
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8 | PointedEar | 242 | String[] items = |
7 | PointedEar | 243 | this.getResources().getStringArray(R.array.currency_units_values); |
8 | PointedEar | 244 | String selectedItemValue1 = items[selectedItemPosition1]; |
245 | String selectedItemValue2 = items[selectedItemPosition2]; |
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7 | PointedEar | 246 | |
247 | if (reverse) |
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248 | { |
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249 | String tmp = selectedItemValue1; |
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250 | selectedItemValue1 = selectedItemValue2; |
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251 | selectedItemValue2 = tmp; |
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252 | } |
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253 | |||
254 | Double newValue = value; |
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255 | |||
8 | PointedEar | 256 | HashMap<String, Double> mapForCurrency = |
257 | CurrenciesActivity.currencyConversions.get(selectedItemValue1); |
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258 | if (mapForCurrency != null) |
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7 | PointedEar | 259 | { |
8 | PointedEar | 260 | Double conversionFactor = mapForCurrency.get(selectedItemValue2); |
261 | if (conversionFactor != null) |
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262 | { |
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263 | newValue *= conversionFactor; |
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264 | } |
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7 | PointedEar | 265 | } |
266 | |||
267 | return newValue.toString(); |
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268 | } |
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8 | PointedEar | 269 | |
270 | /* |
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271 | * (non-Javadoc) |
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272 | * |
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273 | * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu) |
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274 | */ |
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275 | @Override |
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276 | public boolean onCreateOptionsMenu(Menu menu) |
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277 | { |
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278 | MenuInflater inflater = this.getMenuInflater(); |
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279 | inflater.inflate(R.menu.options, menu); |
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280 | return true; |
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281 | } |
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282 | |||
283 | /* |
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284 | * (non-Javadoc) |
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285 | * |
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286 | * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem) |
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287 | */ |
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288 | @Override |
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289 | public boolean onOptionsItemSelected(MenuItem item) |
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290 | { |
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291 | /* update here */ |
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292 | return super.onOptionsItemSelected(item); |
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293 | } |
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11 | PointedEar | 294 | |
295 | /** |
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296 | * @return |
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297 | */ |
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298 | public HashMap<String, HashMap<String, Double>> getCurrencyConversions() |
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299 | { |
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300 | return CurrenciesActivity.currencyConversions; |
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301 | } |
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5 | PointedEar | 302 | } |