Simple Calculator in eclipse | Eclipse

Published: 28 October 2019
on channel: Rayncode

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Building a simple calculator app

1) 3 EditText
2) 1 RadioGroup with additional radio button
3) Write Java codes
4) implement OnCheckedChangeListener
5) add Unimplemented Method to MainActivity
6) Write the calculating codes
7) Now Run the Application

EditText et1, et2, et3;
RadioGroup rg;
RadioButton rb0, rb1, rb2, rb3;

et1 = (EditText) findViewById(R.id.editText1);
et2 = (EditText) findViewById(R.id.editText2);
et3 = (EditText) findViewById(R.id.editText3);

rg = (RadioGroup)findViewById(R.id.radioGroup1);

rb0=(RadioButton)findViewById(R.id.radio0);
rb1=(RadioButton)findViewById(R.id.radio1);
rb2=(RadioButton)findViewById(R.id.radio2);
rb3=(RadioButton)findViewById(R.id.radio3);

rg.setOnCheckedChangeListener(this);

float n1, n2, n3 = 0;

n1 = Float.parseFloat(et1.getText().toString());
n2 = Float.parseFloat(et2.getText().toString());

if(checkedId == rb0.getId())
n3 = n1 + n2;
else if(checkedId == rb1.getId())
n3 = n1 - n2;
else if(checkedId == rb2.getId())
n3 = n1 * n2;
else if(checkedId == rb3.getId())
n3 = n1 / n2;

et3.setText(n3 + "");

Source Code: https://github.com/Yaseen549/SimpleCa...
Follow on GitHub: https://github.com/Yaseen549

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