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1、package class CalculatordemoActivity extends Activity implements OnClickListener /* Called when the activity is first created. */private Button butO = null;private Button butl = null;private Butt on but2 = null;private Butt on but3 = null;private Button but4 = null;private Butt on but5 = n ull;priva。

2、te Button but6 = null;private Butt on but7 = null;private Button but8 = null;private Button but9 = null;private Butt on dim = n ull;private Butt on add = null;private Butt on sub = n ull;private Butt on mult = null;private Butt on div = null;private Butt on equ = null;private EditText etext = null;p。

3、rivate double value = 0;private String strl = null;private String tem = ,H;private String sign = a11;(Overridepublic void onCreate(Bundle savedlnstanceState) (savedlnsta nceState);findViewByldequ = (Button) findViewByld but3 = (Button) findViewByld but4 = (Button) findViewByld but6 = (Button) findVi。

4、ewByld but8 = (Button) findViewByld butO = (Button) findViewByld etext = (EditText) findViewByldbutl = (Button) findViewByld but2 = (Button) findViewByld but5 = (Button) findViewByld but7 = (Button) findViewByld but9 = (Button) findViewByld dim = (Button) findViewByld (new AListener();add = (Button)。

5、 findViewByldsub = (Button)mult = (Button) findViewBylddiv = (Button) findViewByld(new AListe ner();(new AListe ner();(new AListe ner();(new Listener();(this);(this);(this);(this);(this);(this);(this);(this);(this);(this);(this);Overridepublic void onClick(View v) oString();if) else double d = (strl。

6、);if (sign = W) value = d;if (sign = ,#H) value = value * d;if (sign = -) value = value - d;if (sign = “/)value = value/d;if (sign = ,I+H) value = d + value;if (add) sign = +；if (div) if (mult) sign =if (sub) sign =tem =,H;class Listener implements OnClickListener Overridepublic void onClick(View arg) oString();if () else double d = (strl);if (sign = a11) value = d;if (sign = w)value = value * d; if (sign =叮)value = value d;if (sign = T)value = value/d;if (sign = “+) value = d + value;(value +H M);sign = a;value = 0;tem =,n,。