public void checkInput(int buttonId) {
switch (buttonId) {
case BUTTON_INDEX_0: // 0
zeroClick();
break;
case BUTTON_INDEX_POINT: // .
pointClick();
break;
case BUTTON_INDEX_EQUAL: // =
evaluateClick();
break;
case BUTTON_INDEX_DIV: // /
case BUTTON_INDEX_MUL: // *
case BUTTON_INDEX_ADD: // +
symbloClick(buttonId);
break;
case BUTTON_INDEX_SUB: // -
subClick();
break;
case BUTTON_INDEX_DEL: // DEL
deleteClick();
break;
case BUTTON_INDEX_CLEAR: // CLR
entity.setFormula("");
break;
default:
entity.setFormula(entity.getFormula() + buttonValues[buttonId]);
break;
}
}
public void symbloClick(int buttonId) {
while (entity.getFormula().length() > 0
&& ".+−÷×".indexOf(entity.getFormula().charAt(entity.getFormula().length() - 1)) != -1) {
entity.setFormula(entity.getFormula().substring(0, entity.getFormula().length() - 1));
}
if (entity.getFormula().length() > 0) {
entity.setFormula(entity.getFormula() + buttonValues[buttonId]);
}
}
public void subClick() {
while (entity.getFormula().length() > 0
&& ".+−".indexOf(entity.getFormula().charAt(entity.getFormula().length() - 1)) != -1) {
entity.setFormula(entity.getFormula().substring(0, entity.getFormula().length() - 1));
}
entity.setFormula(entity.getFormula() + "-");
}
@Override
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
Log.i(TAG, "intent=" + intent);
if (intent == null) {
return;
}
int widgetId = intent.getIntExtra("widgetId", -1);
if (widgetId == -1) {
return;
}
entity = queryEntityById(widgetId);
if (entity != null) {}
if (entity == null) {
return;
}
if (mTokenizer == null) {
mTokenizer = new CalculatorExpressionTokenizer(this);
}
if (mSymbols == null) {
mSymbols = new Symbols();
}
Uri data = intent.getData();
if (data != null) {
int index = Integer.parseInt(data.getSchemeSpecificPart());
if (isEvalClick) {
if (index <= BUTTON_INDEX_9) {
entity.setFormula("");
}
isEvalClick = false;
}
checkInput(index);
if (index == BUTTON_INDEX_EQUAL) return;
}
if (entity.getView() != null) {
int res = evaluate(entity.getFormula());
entity.getView().setTextViewText(R.id.widget_formula, entity.getFormula());
if (res == RESULT) {
entity.getView().setTextViewText(R.id.widget_result, entity.getResult());
} else {
entity.getView().setTextViewText(R.id.widget_result, "");
}
AppWidgetManager.getInstance(this).updateAppWidget(widgetId, entity.getView());
}
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// TODO Auto-generated method stub
super.onUpdate(context, appWidgetManager, appWidgetIds);
Log.i(TAG, "onUpdate");
Intent service = new Intent(context, CalculatorAppWidgetService.class);
context.startService(service);
for (int i = 0; i < appWidgetIds.length; i++) {
RemoteViews view = new RemoteViews(context.getPackageName(), R.layout.widget_main);
if (appWidgetIds[appWidgetIds.length - 1] > theMaxWidgetID) {
theMaxWidgetID = appWidgetIds[appWidgetIds.length - 1];
CalculatorWidgetEntity entity = new CalculatorWidgetEntity();
entity.setView(view);
entity.setViewId(appWidgetIds[i]);
entity.setFormula("");
entity.setResult("");
mEntities.add(entity);
}
updateWidget(context, view, appWidgetIds[i]);
appWidgetManager.updateAppWidget(appWidgetIds, view);
}
}
public int evaluate(String expr) {
if (expr.equalsIgnoreCase("")) {
return EMPTY;
}
entity.setFormula(mTokenizer.getLocalizedExpression(expr));
expr = mTokenizer.getNormalizedExpression(expr);
while (expr.length() > 0 && ".+-/*".indexOf(expr.charAt(expr.length() - 1)) != -1) {
expr = expr.substring(0, expr.length() - 1);
}
try {
double result = mSymbols.eval(expr);
if (Double.isNaN(result)) {
return NAN; // "NaN";
} else {
entity.setResult(
mTokenizer.getLocalizedExpression(
Util.doubleToString(result, MAX_DIGITS, ROUNDING_DIGITS)));
return RESULT; // "result";
}
} catch (SyntaxException e) {
return SYNTAX; // "syntax";
}
}
public void evaluateClick() {
if (entity.getFormula().equals("")) return;
isEvalClick = true;
int res = evaluate(entity.getFormula());
if (res == NAN) {
entity.setFormula("");
entity.getView().setTextViewText(R.id.widget_result, getText(R.string.error_nan));
} else if (res == RESULT) {
entity.setFormula(entity.getResult());
entity.getView().setTextViewText(R.id.widget_formula, entity.getResult());
} else {
entity.setFormula("");
entity.getView().setTextViewText(R.id.widget_formula, getText(R.string.error_syntax));
entity.getView().setTextViewText(R.id.widget_result, "");
}
AppWidgetManager.getInstance(this).updateAppWidget(entity.getViewId(), entity.getView());
}
public void deleteClick() {
if (entity.getFormula().length() > 0) {
entity.setFormula(entity.getFormula().substring(0, entity.getFormula().length() - 1));
}
}
public void pointClick() {
if (entity.getFormula().equalsIgnoreCase("")) {
entity.setFormula("0.");
} else {
int pointLastIndex = entity.getFormula().lastIndexOf(".");
int subLastIndex = entity.getFormula().lastIndexOf("−"); // -
int addLastIndex = entity.getFormula().lastIndexOf("+"); // +
int divLastIndex = entity.getFormula().lastIndexOf("÷"); // ÷
int mulLastIndex = entity.getFormula().lastIndexOf("×"); // ×
int maxIndex = Math.max(divLastIndex, mulLastIndex);
maxIndex = Math.max(maxIndex, addLastIndex);
maxIndex = Math.max(maxIndex, subLastIndex);
if (maxIndex == -1 && pointLastIndex == -1) {
entity.setFormula(entity.getFormula() + ".");
}
if (pointLastIndex < maxIndex) {
if (maxIndex == entity.getFormula().length() - 1) {
entity.setFormula(entity.getFormula() + "0.");
} else {
entity.setFormula(entity.getFormula() + ".");
}
}
}
}
public void zeroClick() {
entity.setFormula(entity.getFormula() + "0");
}
