| 3 | {{{ |
| 4 | #!java |
| 5 | package www.google.com; |
| 6 | import android.app.Activity; |
| 7 | import android.os.Bundle; |
| 8 | import android.view.View; |
| 9 | import android.view.View.OnClickListener; |
| 10 | import android.widget.Button; |
| 11 | import android.widget.EditText; |
| 12 | |
| 13 | public class Android_helloActivity extends Activity implements OnClickListener |
| 14 | { |
| 15 | private EditText w_editText; // 存放 postfix 及目前輸入數值 |
| 16 | private EditText w_editText2; // 顯示結果 |
| 17 | private String w_editTextString = ""; // w_editText 內的字串 |
| 18 | private String[] postfixStr = new String[100]; // postfix 運算式 |
| 19 | private int postfixPointer = 0; |
| 20 | private String[] opStack = new String [100]; // 運算子的 stack |
| 21 | private int opStackPointer = 0; |
| 22 | private String op = ""; |
| 23 | |
| 24 | /** Called when the activity is first created. */ |
| 25 | @Override |
| 26 | public void onCreate(Bundle savedInstanceState) |
| 27 | { |
| 28 | super.onCreate(savedInstanceState); |
| 29 | setContentView(R.layout.main); |
| 30 | |
| 31 | w_editText = (EditText) findViewById(R.id.editText1); |
| 32 | w_editText2 = (EditText) findViewById(R.id.editText2); |
| 33 | |
| 34 | // 將 button 事件加入 |
| 35 | ((Button) findViewById(R.id.button0)).setOnClickListener(this); // 0 |
| 36 | ((Button) findViewById(R.id.button1)).setOnClickListener(this); // 1 |
| 37 | ((Button) findViewById(R.id.button2)).setOnClickListener(this); // 2 |
| 38 | ((Button) findViewById(R.id.button3)).setOnClickListener(this); // 3 |
| 39 | ((Button) findViewById(R.id.button4)).setOnClickListener(this); // 4 |
| 40 | ((Button) findViewById(R.id.button5)).setOnClickListener(this); // 5 |
| 41 | ((Button) findViewById(R.id.button6)).setOnClickListener(this); // 6 |
| 42 | ((Button) findViewById(R.id.button7)).setOnClickListener(this); // 7 |
| 43 | ((Button) findViewById(R.id.button8)).setOnClickListener(this); // 8 |
| 44 | ((Button) findViewById(R.id.button9)).setOnClickListener(this); // 9 |
| 45 | ((Button) findViewById(R.id.button10)).setOnClickListener(this); // + |
| 46 | ((Button) findViewById(R.id.button11)).setOnClickListener(this); // - |
| 47 | ((Button) findViewById(R.id.button12)).setOnClickListener(this); // × |
| 48 | ((Button) findViewById(R.id.button13)).setOnClickListener(this); // ÷ |
| 49 | ((Button) findViewById(R.id.button14)).setOnClickListener(this); // = |
| 50 | ((Button) findViewById(R.id.button15)).setOnClickListener(this); // AC |
| 51 | } |
| 52 | |
| 53 | private boolean isOp(String str) |
| 54 | { |
| 55 | if (str.equals("+")||str.equals("-")||str.equals("*")||str.equals("/")) |
| 56 | return true; |
| 57 | return false; |
| 58 | } |
| 59 | |
| 60 | |
| 61 | /** 計算結果 */ |
| 62 | private int compute(String[] seqStr, int size) |
| 63 | { |
| 64 | int i; |
| 65 | int numP = 0; |
| 66 | int[] num = new int[10]; |
| 67 | |
| 68 | for (i = 0; i < size; i++) |
| 69 | { |
| 70 | if (isOp(seqStr[i])) |
| 71 | { |
| 72 | numP--; |
| 73 | if (seqStr[i].equals("+")) |
| 74 | num[numP - 1] = num[numP - 1] + num[numP]; |
| 75 | else if (seqStr[i].equals("-")) |
| 76 | num[numP - 1] = num[numP - 1] - num[numP]; |
| 77 | else if (seqStr[i].equals("*")) |
| 78 | num[numP - 1] = num[numP - 1] * num[numP]; |
| 79 | else if (seqStr[i].equals("/")) |
| 80 | num[numP - 1] = num[numP - 1] / num[numP]; |
| 81 | else |
| 82 | return -9999; // error |
| 83 | } |
| 84 | else |
| 85 | num[numP++] =Integer.parseInt(seqStr[i]); |
| 86 | } |
| 87 | return num[0]; |
| 88 | } |
| 89 | |
| 90 | /** click 事件 */ |
| 91 | @Override |
| 92 | public void onClick(View view) |
| 93 | { |
| 94 | int i; |
| 95 | switch (view.getId()) |
| 96 | { |
| 97 | // 按鍵 0~9 事件 |
| 98 | case R.id.button0: |
| 99 | case R.id.button1: |
| 100 | case R.id.button2: |
| 101 | case R.id.button3: |
| 102 | case R.id.button4: |
| 103 | case R.id.button5: |
| 104 | case R.id.button6: |
| 105 | case R.id.button7: |
| 106 | case R.id.button8: |
| 107 | case R.id.button9: |
| 108 | // 將 android:text 的值取出 |
| 109 | String inDigit = ((Button) view).getText().toString(); |
| 110 | if (w_editTextString.equals("0")) { |
| 111 | w_editTextString = inDigit; |
| 112 | } else { |
| 113 | w_editTextString += inDigit; |
| 114 | } |
| 115 | w_editText.setText(w_editTextString); |
| 116 | break; |
| 117 | |
| 118 | case R.id.button10: // 按鍵 + |
| 119 | // 存入數值 |
| 120 | postfixStr[postfixPointer++] = w_editTextString; |
| 121 | w_editTextString = ""; |
| 122 | // 將 op stack 全取出 |
| 123 | if (!op.equals("")) |
| 124 | { |
| 125 | for (i = --opStackPointer; i >= 0; i--) |
| 126 | { |
| 127 | postfixStr[postfixPointer++] = opStack[i]; |
| 128 | } |
| 129 | opStackPointer = 0; |
| 130 | } |
| 131 | // 將新的 op 放入 stack |
| 132 | opStack[opStackPointer++] = "+"; |
| 133 | op = "+"; |
| 134 | break; |
| 135 | case R.id.button11: // 按鍵 - |
| 136 | // 存入數值 |
| 137 | postfixStr[postfixPointer++] = w_editTextString; |
| 138 | w_editTextString = ""; |
| 139 | // 將 op stack 全取出 |
| 140 | if (!op.equals("")) |
| 141 | { |
| 142 | for (i = --opStackPointer; i >= 0; i--) |
| 143 | { |
| 144 | postfixStr[postfixPointer++] = opStack[i]; |
| 145 | } |
| 146 | opStackPointer = 0; |
| 147 | } |
| 148 | // 將新的 op 放入 stack |
| 149 | opStack[opStackPointer++] = "-"; |
| 150 | op = "-"; |
| 151 | break; |
| 152 | case R.id.button12: // 按鍵 * |
| 153 | // 存入數值 |
| 154 | postfixStr[postfixPointer++] = w_editTextString; |
| 155 | w_editTextString = ""; |
| 156 | // 將新的 op 放入 stack |
| 157 | opStack[opStackPointer++] = "*"; |
| 158 | op = "*"; |
| 159 | break; |
| 160 | case R.id.button13: // 按鍵 / |
| 161 | // 存入數值 |
| 162 | postfixStr[postfixPointer++] = w_editTextString; |
| 163 | w_editTextString = ""; |
| 164 | // 將新的 op 放入 stack |
| 165 | opStack[opStackPointer++] = "/"; |
| 166 | op = "/"; |
| 167 | break; |
| 168 | case R.id.button14: // 按鍵 = |
| 169 | postfixStr[postfixPointer++] = w_editTextString; |
| 170 | w_editTextString = ""; |
| 171 | |
| 172 | for (i = --opStackPointer; i >= 0; i--) |
| 173 | { |
| 174 | postfixStr[postfixPointer++] = opStack[i]; |
| 175 | } |
| 176 | //w_editText.setText(" "+postfixPointer); |
| 177 | for (i = 0; i < postfixPointer; i++) |
| 178 | { |
| 179 | w_editTextString = w_editTextString + postfixStr[i] + " "; |
| 180 | } |
| 181 | w_editText.setText(w_editTextString); |
| 182 | w_editText2.setText(Integer.toString(compute(postfixStr, postfixPointer))); |
| 183 | break; |
| 184 | |
| 185 | // 按鍵 AC :回到初始值 |
| 186 | case R.id.button15: |
| 187 | w_editTextString = ""; // w_editText 內的字串 |
| 188 | postfixPointer = 0; |
| 189 | opStackPointer = 0; |
| 190 | op = ""; |
| 191 | w_editText.setText(""); |
| 192 | w_editText2.setText(""); |
| 193 | break; |
| 194 | } // end of switch |
| 195 | } // edn of onClick |
| 196 | |
| 197 | } |
| 198 | }}} |
| 200 | {{{ |
| 201 | #!xml |
| 202 | <?xml version="1.0" encoding="utf-8"?> |
| 203 | <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" |
| 204 | android:layout_width="fill_parent" |
| 205 | android:layout_height="fill_parent" android:orientation="vertical"> |
| 206 | <EditText android:id="@+id/editText1" android:layout_width="match_parent" android:layout_height="wrap_content"> |
| 207 | <requestFocus></requestFocus> |
| 208 | </EditText> |
| 209 | <LinearLayout android:id="@+id/linearLayout1" android:layout_width="match_parent" android:layout_height="wrap_content"> |
| 210 | <Button android:text="7" android:id="@+id/button7" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 211 | <Button android:text="8" android:id="@+id/button8" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 212 | <Button android:text="9" android:id="@+id/button9" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 213 | <Button android:text="+" android:id="@+id/button10" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 214 | </LinearLayout> |
| 215 | <LinearLayout android:id="@+id/linearLayout2" android:layout_width="match_parent" android:layout_height="wrap_content"> |
| 216 | <Button android:text="4" android:id="@+id/button4" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 217 | <Button android:text="5" android:id="@+id/button5" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 218 | <Button android:text="6" android:id="@+id/button6" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 219 | <Button android:text="–" android:id="@+id/button11" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 220 | </LinearLayout> |
| 221 | <LinearLayout android:id="@+id/linearLayout3" android:layout_width="match_parent" android:layout_height="wrap_content"> |
| 222 | <Button android:text="1" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 223 | <Button android:text="2" android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 224 | <Button android:text="3" android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 225 | <Button android:text="*" android:id="@+id/button12" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 226 | </LinearLayout> |
| 227 | <LinearLayout android:id="@+id/linearLayout4" android:layout_width="match_parent" android:layout_height="wrap_content"> |
| 228 | <Button android:text="0" android:id="@+id/button0" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 229 | <Button android:text="AC" android:id="@+id/button15" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 230 | <Button android:text="=" android:id="@+id/button14" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 231 | <Button android:text="/" android:id="@+id/button13" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> |
| 232 | </LinearLayout> |
| 233 | <EditText android:id="@+id/editText2" android:layout_width="match_parent" android:layout_height="wrap_content"></EditText> |
| 234 | |
| 235 | </LinearLayout> |
| 236 | |
| 237 | }}} |