Untitled
unknown
plain_text
5 months ago
19 kB
2
Indexable
package com.example.calculator;
import android.content.res.Configuration;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
public TextView input, output;
Button btnAC, btnDel, btnPersent, btnDivision,btn7, btn8,btn9,btn5,btn6,btn4,btn3,btn2,btn1,btn0,btnPoint,multiply, subtract, add, equal;
Button btnx2, btnDeg, btnSin, btnCos, btnTan, btnpow, btnlg, btnLn, btnMoNgoac, btnDongNgoac, btnSqrt, btnGiaiThua, btn1ChiaX, btnPi, btnRand,btnE;
Boolean flag = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
input = findViewById(R.id.input);
output = findViewById(R.id.output);
if(savedInstanceState != null) {
String dataInput = savedInstanceState.getString("input");
String dataOutput = savedInstanceState.getString("output");
input.setText(dataInput);
output.setText(dataOutput);
}
if(flag) {
btnSin = findViewById(R.id.btnSin);
btnCos = findViewById(R.id.btnCos);
btnTan = findViewById(R.id.btnTan);
btnlg = findViewById(R.id.btnlg);
btnLn = findViewById(R.id.btnLn);
btnGiaiThua = findViewById(R.id.btnGiaiThua);
btnx2 = findViewById(R.id.btnx2);
btnSqrt = findViewById(R.id.btnSqrt);
btn1ChiaX = findViewById(R.id.btn1ChiaX);
}
// initializing all our variables.
btnAC = findViewById(R.id.btnAC);
btnDel = findViewById(R.id.btnDel);
btnMoNgoac = findViewById(R.id.btnMoNgoac);
btnDongNgoac = findViewById(R.id.btnDongNgoac);
btn0 = findViewById(R.id.btn0);
btn9 = findViewById(R.id.btn9);
btn8 = findViewById(R.id.btn8);
btn7 = findViewById(R.id.btn7);
btn6 = findViewById(R.id.btn6);
btn5 = findViewById(R.id.btn5);
btn4 = findViewById(R.id.btn4);
btn3 = findViewById(R.id.btn3);
btn2 = findViewById(R.id.btn2);
btn1 = findViewById(R.id.btn1);
btnPi = findViewById(R.id.btnPi);
multiply = findViewById(R.id.multiply);
subtract = findViewById(R.id.subtract);
add = findViewById(R.id.add);
equal = findViewById(R.id.equal);
btnPoint = findViewById(R.id.btnPoint);
btnDivision = findViewById(R.id.btnDivision);
// adding on click listener to our all buttons.
ArrayList<Button> listNumber = new ArrayList<>();
listNumber.add(btn0);
listNumber.add(btn1);
listNumber.add(btn2);
listNumber.add(btn3);
listNumber.add(btn4);
listNumber.add(btn5);
listNumber.add(btn6);
listNumber.add(btn7);
listNumber.add(btn8);
listNumber.add(btn9);
for(Button btn : listNumber) {
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + btn.getText().toString());
}
});
}
add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + "+");
}
});
btnDivision.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + "/");
}
});
subtract.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String str = input.getText().toString();
if (str.charAt(str.length() - 1) != '-') {
input.setText(input.getText().toString() + "-");
}
}
});
multiply.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String str = input.getText().toString();
if (str.charAt(str.length() - 1) != '*') {
input.setText(input.getText().toString() + "*");
}
}
});
btnMoNgoac.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + "(");
}
});
btnDongNgoac.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + ")");
}
});
if(flag) {
btnPi.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + Math.PI);
output.setText(btnPi.getText().toString());
}
});
btnSin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + "sin");
}
});
btnCos.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + "cos");
}
});
btnTan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + "tan");
}
});
btn1ChiaX.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + "^" + "(-1)");
}
});
btnLn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
input.setText(input.getText().toString() + "ln");
}
});
btnSqrt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (input.getText().toString().isEmpty()) {
Toast.makeText(getApplicationContext(),
"Please enter a valid number..", Toast.LENGTH_SHORT).show();
} else {
String str = input.getText().toString();
double r = Math.sqrt(Double.parseDouble(str));
input.setText(String.valueOf(r));
}
}
});
btnx2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (input.getText().toString().isEmpty()) {
Toast.makeText(getApplicationContext(),
"Please enter a valid number..", Toast.LENGTH_SHORT).show();
} else {
Double d = Double.parseDouble(input.getText().toString());
Double square = d * d;
input.setText(square.toString());
output.setText("$d²");
}
}
});
btnGiaiThua.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (input.getText().toString().isEmpty()) {
// if the entered number is empty we are displaying an error message.
Toast.makeText(getApplicationContext(),
"Please enter a valid number..", Toast.LENGTH_SHORT).show();
} else {
int value= Integer.parseInt(input.getText().toString());
int fact = factorial(value);
output.setText(String.valueOf(fact));
input.setText(value+"!");
}
}
});
}
equal.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String curdata = input.getText().toString();
String res = String.valueOf(Calculator.evaluateExpression(curdata));
if(curdata.length()>80) output.setTextSize(28);
else {
if(curdata.length()>25) output.setTextSize(42);
else output.setTextSize(55);}
// Integer checkD = checkDau(curdata);
// for(Integer i=1;i<=checkD;i++) curdata = curdata + ")";
// input.setText(curdata);
if(res.endsWith(".0")) res = res.replace(".0","");
input.setText(res);
output.setText("=" + res);
}
});
btnAC.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
output.setTextSize(60);
input.setTextSize(40);
input.setText("");
output.setText("");
}
});
btnDel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String curdata = input.getText().toString();
if(!curdata.equals("0")) curdata=curdata.substring(0,curdata.length()-1);
input.setText(curdata);
output.setText("");
}
});
}
int factorial(int n){
// this method is use to find factorial
return (n == 1 || n == 0) ? 1 : n * factorial(n - 1);
}
// Check dấu đóng mo ngoặc
Integer checkDau(String data)
{
Integer checkp=0;
for(Integer i=0;i<= data.length()-1;i++)
{
if(data.charAt(i)=='(') checkp++;
if(data.charAt(i)==')') checkp--;
}
return checkp;
}
// public static final double evaluate(final String str) {
// //Intrinsics.checkNotNullParameter(str, "str");
// return ((new Object() {
// private int pos = -1;
// private int ch;
//
// public final int getPos() {
// return this.pos;
// }
//
// public final void setPos(int var1) {
// this.pos = var1;
// }
//
// public final int getCh() {
// return this.ch;
// }
//
// public final void setCh(int var1) {
// this.ch = var1;
// }
//
// public final void nextChar() {
// ++this.pos;
// this.ch = this.pos < str.length() ? str.charAt(this.pos) : -1;
// }
//
// public final boolean eat(int charToEat) {
// while(this.ch == 32) {
// this.nextChar();
// }
//
// if (this.ch == charToEat) {
// this.nextChar();
// return true;
// } else {
// return false;
// }
// }
//
// public final double parse() {
// this.nextChar();
// double x = this.parseExpression();
// if (this.pos < str.length()) {
// try {
// throw (Throwable)(new RuntimeException("Unexpected: " + (char)this.ch));
// } catch (Throwable throwable) {
// throwable.printStackTrace();
// }
// }
// return x;
// }
//
// public final double parseExpression() {
// double x = this.parseTerm();
//
// while(true) {
// while(!this.eat(43)) {
// if (!this.eat(45)) {
// return x;
// }
//
// x -= this.parseTerm();
// }
//
// x += this.parseTerm();
// }
// }
//
// public final double parseTerm() {
// double x = this.parseFactor();
//
// while(true) {
// while(!this.eat(42)) {
// if (!this.eat(47)) {
// return x;
// }
//
// x /= this.parseFactor();
// }
//
// x *= this.parseFactor();
// }
// }
//
// public final double parseFactor() {
// if (this.eat(43)) {
// return this.parseFactor();
// } else if (this.eat(45)) {
// return -this.parseFactor();
// } else {
// double x = 0.0D;
// int startPos = this.pos;
// if (this.eat(40)) {
// x = this.parseExpression();
// this.eat(41);
// } else {
// String var10000;
// String func;
// if ((this.ch < 48 || this.ch > 57) && this.ch != 46) {
// if (this.ch < 97 || this.ch > 122) {
// try {
// throw (Throwable)(new RuntimeException("Unexpected: " + (char)this.ch));
// } catch (Throwable throwable) {
// throwable.printStackTrace();
// }
// }
//
// while(this.ch >= 97 && this.ch <= 122) {
// this.nextChar();
// }
//
// String var9 = str;
// int var10 = this.pos;
// boolean var7 = false;
// if (var9 == null) {
// throw new NullPointerException("null cannot be cast to non-null type java.lang.String");
// }
//
// var10000 = var9.substring(startPos, var10);
// //Intrinsics.checkNotNullExpressionValue(var10000, "(this as java.lang.Strin…ing(startIndex, endIndex)");
// func = var10000;
// x = this.parseFactor();
// double var11;
// if (str.equals("sqrt")) {
// var11 = Math.sqrt(x);
// } else if (str.equals( "sin")) {
// var11 = Math.sin(Math.toRadians(x));
// } else if (str.equals("cos")) {
// var11 = Math.cos(Math.toRadians(x));
// } else if (str.equals( "tan")) {
// var11 = Math.tan(Math.toRadians(x));
// } else if (str.equals( "log")) {
// var11 = Math.log10(x);
// } else {
// if (!str.equals("ln")) {
// try {
// throw (Throwable)(new RuntimeException("Unknown function: " + func));
// } catch (Throwable throwable) {
// throwable.printStackTrace();
// }
// }
//
// var11 = Math.log(x);
// }
//
// x = var11;
// } else {
// while(true) {
// if ((this.ch < 48 || this.ch > 57) && this.ch != 46) {
// func = str;
// int var5 = this.pos;
// boolean var6 = false;
// if (func == null) {
// throw new NullPointerException("null cannot be cast to non-null type java.lang.String");
// }
//
// var10000 = func.substring(startPos, var5);
// //Intrinsics.checkNotNullExpressionValue(var10000, "(this as java.lang.Strin…ing(startIndex, endIndex)");
// func = var10000;
// boolean var8 = false;
// x = Double.parseDouble(func);
// break;
// }
//
// this.nextChar();
// }
// }
// }
//
// if (this.eat(94)) {
// x = Math.pow(x, this.parseFactor());
// }
//
// return x;
// }
// }
// })).parse();
// }
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Checks the orientation of the screen
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
Toast.makeText(this, "landscape", Toast.LENGTH_SHORT).show();
flag = true;
} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
Toast.makeText(this, "portrait", Toast.LENGTH_SHORT).show();
flag = false;
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("input", input.getText().toString());
outState.putString("output", output.getText().toString());
}
}Leave a Comment