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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; |
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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9 | import android.view.View; |
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10 | import android.view.View.OnKeyListener; |
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11 | import android.widget.AdapterView; |
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12 | import android.widget.AdapterView.OnItemSelectedListener; |
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13 | import android.widget.EditText; |
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14 | import android.widget.Spinner; |
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15 | import android.widget.TextView; |
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8 | PointedEar | 16 | import de.pointedears.converter.R; |
5 | PointedEar | 17 | |
18 | /** |
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7 | PointedEar | 19 | * Activity that implements length conversion |
5 | PointedEar | 20 | * |
7 | PointedEar | 21 | * @author pelinux |
5 | PointedEar | 22 | */ |
23 | public class TemperaturesActivity extends Activity |
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24 | { |
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7 | PointedEar | 25 | /* |
26 | * Constants for mapping value strings to internal IDs |
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27 | */ |
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28 | private static final String VALUE_CELSIUS = "C"; //$NON-NLS-1$ |
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29 | private static final String VALUE_FAHRENHEIT = "F"; //$NON-NLS-1$ |
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30 | private static final String VALUE_KELVIN = "K"; //$NON-NLS-1$ |
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31 | private static final int ITEM_CELSIUS = 0; |
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32 | private static final int ITEM_FAHRENHEIT = 1; |
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33 | private static final int ITEM_KELVIN = 2; |
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34 | |||
35 | /** |
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36 | * Maps value strings to internal IDs |
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37 | */ |
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38 | private final static HashMap<String, Integer> valueToId = |
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39 | new HashMap<String, Integer>(); |
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40 | |||
41 | /* Unit spinners (dropdowns) */ |
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42 | private Spinner spinnerUnit1; |
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43 | private Spinner spinnerUnit2; |
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44 | |||
45 | /* Hint that value is off scale */ |
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46 | private TextView textOffScale; |
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47 | |||
48 | static |
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49 | { |
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50 | TemperaturesActivity.valueToId.put(TemperaturesActivity.VALUE_CELSIUS, |
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51 | TemperaturesActivity.ITEM_CELSIUS); |
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52 | TemperaturesActivity.valueToId.put(TemperaturesActivity.VALUE_FAHRENHEIT, |
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53 | TemperaturesActivity.ITEM_FAHRENHEIT); |
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54 | TemperaturesActivity.valueToId.put(TemperaturesActivity.VALUE_KELVIN, |
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55 | TemperaturesActivity.ITEM_KELVIN); |
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56 | } |
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57 | |||
58 | /** Called when the activity is first created. */ |
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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_temperatures); |
5 | PointedEar | 65 | |
7 | PointedEar | 66 | this.textOffScale = |
67 | (TextView) this.findViewById(R.id.temperatures_text_off_scale); |
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5 | PointedEar | 68 | |
7 | PointedEar | 69 | final EditText editValue1 = |
70 | (EditText) this.findViewById(R.id.temperatures_edit_value1); |
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71 | final EditText editValue2 = |
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72 | (EditText) this.findViewById(R.id.temperatures_edit_value2); |
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5 | PointedEar | 73 | |
7 | PointedEar | 74 | final OnKeyListener editValue1OnKey = new OnKeyListener() { |
75 | @Override |
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76 | public boolean onKey(View v, int keyCode, KeyEvent event) |
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77 | { |
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78 | Editable editable1 = ((EditText) v).getText(); |
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79 | |||
80 | Double value1; |
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81 | try |
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82 | { |
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83 | value1 = Double.parseDouble(editable1.toString()); |
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84 | } |
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85 | catch (NumberFormatException e) |
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86 | { |
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87 | value1 = null; |
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88 | } |
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89 | |||
90 | String string2 = ""; //$NON-NLS-1$ |
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91 | if (value1 != null) |
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92 | { |
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93 | string2 = TemperaturesActivity.this.getConvertedValue(value1, false); |
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94 | } |
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95 | |||
96 | editValue2.setText(string2); |
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97 | |||
98 | return false; |
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99 | } |
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100 | }; |
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101 | editValue1.setOnKeyListener(editValue1OnKey); |
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102 | |||
103 | final OnKeyListener editValue2OnKey = new OnKeyListener() { |
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104 | @Override |
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105 | public boolean onKey(View v, int keyCode, KeyEvent event) |
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106 | { |
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107 | Editable editable2 = ((EditText) v).getText(); |
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108 | |||
109 | Double value2; |
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110 | try |
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111 | { |
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112 | value2 = Double.parseDouble(editable2.toString()); |
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113 | } |
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114 | catch (NumberFormatException e) |
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115 | { |
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116 | value2 = null; |
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117 | } |
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118 | |||
119 | String string1 = ""; //$NON-NLS-1$ |
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120 | if (value2 != null) |
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121 | { |
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122 | string1 = TemperaturesActivity.this.getConvertedValue(value2, true); |
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123 | } |
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124 | |||
125 | editValue1.setText(string1); |
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126 | |||
127 | return false; |
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128 | } |
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129 | }; |
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130 | editValue2.setOnKeyListener(editValue2OnKey); |
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131 | |||
132 | this.spinnerUnit1 = |
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133 | (Spinner) this.findViewById(R.id.temperatures_spinner_unit1); |
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134 | this.spinnerUnit2 = |
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135 | (Spinner) this.findViewById(R.id.temperatures_spinner_unit2); |
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136 | |||
137 | this.spinnerUnit1.setOnItemSelectedListener(new OnItemSelectedListener() { |
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138 | @Override |
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139 | public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, |
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140 | long arg3) |
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141 | { |
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142 | /* Simulate input in second EditText so that first EditText is updated */ |
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143 | editValue2OnKey.onKey(editValue2, 0, null); |
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144 | } |
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145 | |||
146 | @Override |
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147 | public void onNothingSelected(AdapterView<?> arg0) |
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148 | { |
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149 | /* no-op */ |
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150 | } |
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151 | }); |
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152 | |||
153 | this.spinnerUnit2.setSelection(1); |
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154 | this.spinnerUnit2.setOnItemSelectedListener(new OnItemSelectedListener() { |
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155 | @Override |
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156 | public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, |
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157 | long arg3) |
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158 | { |
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159 | /* Simulate input in first EditText so that second EditText is updated */ |
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160 | editValue1OnKey.onKey(editValue1, 0, null); |
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161 | } |
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162 | |||
163 | @Override |
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164 | public void onNothingSelected(AdapterView<?> arg0) |
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165 | { |
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166 | /* no-op */ |
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167 | } |
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168 | }); |
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5 | PointedEar | 169 | } |
7 | PointedEar | 170 | |
171 | /** |
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172 | * @param value |
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173 | * @return |
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174 | */ |
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175 | private String getConvertedValue(double value, boolean reverse) |
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176 | { |
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177 | int selectedItemPosition1 = this.spinnerUnit1.getSelectedItemPosition(); |
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178 | int selectedItemPosition2 = this.spinnerUnit2.getSelectedItemPosition(); |
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179 | String[] itemArray = |
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180 | this.getResources().getStringArray(R.array.temperature_units_values); |
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181 | String selectedItemValue1 = itemArray[selectedItemPosition1]; |
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182 | String selectedItemValue2 = itemArray[selectedItemPosition2]; |
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183 | |||
184 | if (reverse) |
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185 | { |
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186 | String tmp = selectedItemValue1; |
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187 | selectedItemValue1 = selectedItemValue2; |
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188 | selectedItemValue2 = tmp; |
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189 | } |
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190 | |||
191 | int itemId1 = TemperaturesActivity.valueToId.get(selectedItemValue1); |
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192 | int itemId2 = TemperaturesActivity.valueToId.get(selectedItemValue2); |
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193 | |||
194 | Double newValue = value; |
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195 | |||
196 | this.textOffScale.setVisibility(View.INVISIBLE); |
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197 | |||
198 | switch (itemId1) |
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199 | { |
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200 | case ITEM_CELSIUS: |
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201 | switch (itemId2) |
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202 | { |
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203 | case ITEM_FAHRENHEIT: |
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204 | newValue = new Double(value * 9.0 / 5 + 32); |
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205 | break; |
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206 | |||
207 | case ITEM_KELVIN: |
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208 | newValue = new Double(value + 273.15); |
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209 | |||
210 | if (newValue < 0.0) |
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211 | { |
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212 | this.textOffScale.setVisibility(View.VISIBLE); |
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213 | return "*" + newValue.toString(); |
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214 | } |
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215 | break; |
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216 | } |
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217 | break; |
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218 | |||
219 | case ITEM_FAHRENHEIT: |
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220 | switch (itemId2) |
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221 | { |
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222 | case ITEM_CELSIUS: |
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223 | newValue = new Double((value - 32) * 5.0 / 9); |
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224 | break; |
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225 | |||
226 | case ITEM_KELVIN: |
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227 | newValue = new Double((value + 459.67) * 5.0 / 9); |
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228 | |||
229 | if (newValue < 0.0) |
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230 | { |
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231 | this.textOffScale.setVisibility(View.VISIBLE); |
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232 | return "*" + newValue.toString(); |
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233 | } |
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234 | break; |
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235 | } |
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236 | break; |
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237 | |||
238 | case ITEM_KELVIN: |
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239 | switch (itemId2) |
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240 | { |
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241 | case ITEM_CELSIUS: |
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242 | newValue = new Double(value - 273.15); |
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243 | break; |
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244 | |||
245 | case ITEM_FAHRENHEIT: |
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246 | newValue = new Double(value * 9.0 / 5 - 459.67); |
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247 | break; |
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248 | } |
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8 | PointedEar | 249 | |
250 | if (value < 0.0) |
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251 | { |
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252 | this.textOffScale.setVisibility(View.VISIBLE); |
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253 | return "*" + newValue.toString(); |
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254 | } |
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7 | PointedEar | 255 | break; |
256 | } |
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257 | |||
258 | return newValue.toString(); |
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259 | } |
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5 | PointedEar | 260 | } |