@Override
protected void onSaveInstanceState(@NonNull Bundle outState) {
// If there's an animation in progress, cancel it first to ensure our state is up-to-date.
if (mCurrentAnimator != null) {
mCurrentAnimator.cancel();
}
super.onSaveInstanceState(outState);
outState.putInt(KEY_CURRENT_STATE, mCurrentState.ordinal());
outState.putString(
KEY_CURRENT_EXPRESSION,
mTokenizer.getNormalizedExpression(mFormulaEditText.getCleanText()));
}
protected void initialize(Bundle savedInstanceState) {
// Rebuild constants. If the user changed their locale, it won't kill the app
// but it might change a decimal point from . to ,
Constants.rebuildConstants();
mDisplayView = (DisplayOverlay) findViewById(R.id.display);
mDisplayView.setFade(findViewById(R.id.history_fade));
mDisplayForeground = (ViewGroup) findViewById(R.id.the_clear_animation);
mFormulaEditText = (CalculatorEditText) findViewById(R.id.formula);
mResultEditText = (CalculatorEditText) findViewById(R.id.result);
mPadViewPager = (CalculatorPadView) findViewById(R.id.pad_pager);
mDeleteButton = findViewById(R.id.del);
mClearButton = findViewById(R.id.clr);
mEqualButton = (EqualsImageButton) findViewById(R.id.pad_numeric).findViewById(R.id.eq);
if (mEqualButton == null || mEqualButton.getVisibility() != View.VISIBLE) {
mEqualButton = (EqualsImageButton) findViewById(R.id.pad_operator).findViewById(R.id.eq);
}
mTokenizer = new CalculatorExpressionTokenizer(this);
mEvaluator = new CalculatorExpressionEvaluator(mTokenizer);
setState(
CalculatorState.values()[
savedInstanceState.getInt(KEY_CURRENT_STATE, CalculatorState.INPUT.ordinal())]);
mFormulaEditText.setSolver(mEvaluator.getSolver());
mResultEditText.setSolver(mEvaluator.getSolver());
mFormulaEditText.setText(
mTokenizer.getLocalizedExpression(
savedInstanceState.getString(KEY_CURRENT_EXPRESSION, "")));
mFormulaEditText.addTextChangedListener(mFormulaTextWatcher);
mFormulaEditText.setOnKeyListener(mFormulaOnKeyListener);
mFormulaEditText.setOnTextSizeChangeListener(this);
mDeleteButton.setOnLongClickListener(this);
mResultEditText.setEnabled(false);
findViewById(R.id.lparen).setOnLongClickListener(this);
findViewById(R.id.rparen).setOnLongClickListener(this);
findViewById(R.id.fun_sin).setOnLongClickListener(this);
findViewById(R.id.fun_cos).setOnLongClickListener(this);
findViewById(R.id.fun_tan).setOnLongClickListener(this);
// Disable IME for this application
getWindow()
.setFlags(
WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM,
WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
Button dot = (Button) findViewById(R.id.dec_point);
dot.setText(String.valueOf(Constants.DECIMAL_POINT));
}
protected String getNormalizedExpression(String expr) {
return mTokenizer.getNormalizedExpression(expr);
}
protected String cleanExpression(String expr) {
expr = EquationFormatter.appendParenthesis(expr);
expr = Solver.clean(expr);
expr = mTokenizer.getLocalizedExpression(expr);
return expr;
}