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binding.divideButton.setOnClickListener { btnMath(binding.divideButton) }
binding.resultButton.setOnClickListener { btnEquel() }
binding.resultTextView.setOnClickListener{resultTextView()}
binding.ceButton.setOnClickListener {ceButton() }
binding.percentButton.setOnClickListener { percentButton() }
}
fun onClick(view: View) {
val id = view.id
var value = binding.editText.text.toString()
when (id) {
binding.oneButton.id -> {
value += "1"
stringBuilder.append("1")
tempStringBuilder.append("1")
}
binding.twoButton.id -> {
value += "2"
stringBuilder.append("2")
tempStringBuilder.append("2")
}
binding.threeButton.id -> {
value += "3"
stringBuilder.append("3")
tempStringBuilder.append("3")
}
binding.fourButton.id -> {
value += "4"
stringBuilder.append("4")
tempStringBuilder.append("4")
}
binding.fiveButton.id -> {
value += "5"
stringBuilder.append("5")
tempStringBuilder.append("5")
}
binding.sixButton.id -> {
value += "6"
stringBuilder.append("6")
tempStringBuilder.append("6")
}
binding.sevenButton.id -> {
value += "7"
stringBuilder.append("7")
tempStringBuilder.append("7")
}
binding.eightButton.id -> {
value += "8"
stringBuilder.append("8")
tempStringBuilder.append("8")
}
binding.nineButton.id -> {
value += "9"
stringBuilder.append("9")
tempStringBuilder.append("9")
}
binding.zeroButton.id -> {
value += "0"
stringBuilder.append("0")
tempStringBuilder.append("0")
}
binding.pointButton.id -> {
value += "."
stringBuilder.append(".")
tempStringBuilder.append(".")
}
binding.cButton.id -> {
value = ""
stringBuilder.clear()
tempStringBuilder.clear();
}
binding.deleteButton.id -> {
value = binding.editText.text.toString()
if (value.isNotEmpty()) {
value = value.substring(0, value.length - 1)
}
if (stringBuilder.isNotEmpty()) {
stringBuilder.deleteCharAt(stringBuilder.length - 1)
if (stringBuilder.contains("=")) {
value = ""
stringBuilder.clear()
}
}
}
}
binding.editText.setText(value)
}
Bu onclick funksiya bizdagi buttonlarni bosilganda qayerga malumto jonatish va nimalarni chiqarish bilan shugulanadi.
OnViewCreat ni ichida pastrog’gida matematik ammalarni bajarish uchun funksiyalr yozilgan .
private fun isMathOperation(c: Char):Boolean {
if(c == '+' || c=='-' || c == '/' || c == '*') return true;
return false;
}
bu funksiya bizga operatsion belgini qaytaradi shu belgimi yoqmi deb.
fun btnMath(view: View) {
val id = view.id
when (id) {
binding.multiplyButton.id -> {
if(stringBuilder.isNotEmpty() && !isMathOperation(stringBuilder[stringBuilder.length - 1])) {
stringBuilder.append("*");
}
}
binding.divideButton.id -> {
if(stringBuilder.isNotEmpty() && !isMathOperation(stringBuilder[stringBuilder.length - 1])) {
stringBuilder.append("/");
}
}
binding.minusButton.id -> {
if(stringBuilder.isNotEmpty() && !isMathOperation(stringBuilder[stringBuilder.length - 1])) {
stringBuilder.append("-")
}
if(stringBuilder.isEmpty()) stringBuilder.append("-")
}
binding.plusButton.id -> {
if(stringBuilder.isNotEmpty() && !isMathOperation(stringBuilder[stringBuilder.length - 1])) {
stringBuilder.append("+")
}
}
}
if(stringBuilder.isNotEmpty()) {
binding.editText.setText(stringBuilder.toString())
}
}
Bu funksiya esa ammalardan bir bosilganda bu stringbuilderga yig’adi yani bizga bu uzun ammalarni hisoblashga kerak boladi
private fun getCharCode(a: Char):Int {
return a.toInt()
}
private fun btnEquel(){
if(stringBuilder.isEmpty()) return
if(stringBuilder.isNotEmpty() && isMathOperation(stringBuilder[stringBuilder.length - 1])) return
binding.resultTextView.text = stringBuilder.toString()
if ( stringBuilder.isNotEmpty() && !isMathOperation(stringBuilder[0])) {
stringBuilder.insert(0, '+');
}
stringBuilder.append('+');
Log.d("stringEqual: ", stringBuilder.toString());
var a: MutableList = arrayListOf()
var num = 0.0;
var sign = 1;
var lastOperation = '+';
for(i in stringBuilder.indices) {
if (isMathOperation(stringBuilder[i])) {
if(i > 0) {
if(lastOperation == '-') {
a.add(-1 * num);
} else if(lastOperation == '+') {
a.add(num)
} else if(lastOperation == '*') {
a[a.size-1] *= num;
} else if(lastOperation == '/') {
a[a.size-1] /= num;
}
}
num = 0.0
lastOperation = stringBuilder[i];
} else {
num = num * 10 + getCharCode(stringBuilder[i]) - 48;
}
}
var result = 0.0
for(item in a) {
result+=item
}
Log.d("arrayresult", a.toString())
Log.d("result", result.toString())
stringBuilder.append(result)
binding.editText.setText(" = ${result.toString()}")
tempStringBuilder.clear()
}
private fun resultTextView(){
binding.editText.setText("")
binding.resultTextView.setOnClickListener
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