Calculator that accepts floating point values

[jnh Sand]

Hey guys. I'm currently learning to use Android Studios, and I'm quite stuck. The exercise I'm doing is to create a calculator, with the buttons +,-,/. I am done with the calculator, and I've gotten it to work, except for one instance.

Whenever I put in a floating number, even with only one decimal, the program crashes. I experienced this when trying to divide by zero as well, which I solved by surrounding the code with try and catch.

However, I am clueless to what I should to get decimals to work. I would very much appreciate if you could take a look at my code and help me with this issue. My program contains a main java class, and a main xml_class. I'll post them down below:

MainActivity.java:

package se.hig.p18wisa02.mycalculator;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Button btnAdd,btnSubtract,btnDivide,btnMultiply;
    private TextView tvresult;
    private EditText etfirst, etsecond;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    init();
}

private void init() {
    btnAdd =(Button) findViewById(R.id.btnAdd);
    btnSubtract = (Button) findViewById(R.id.btnSubtract);
    btnDivide = (Button) findViewById(R.id.btnDivide);
    btnMultiply = (Button) findViewById(R.id.btnMultiply);
    etfirst = (EditText) findViewById(R.id.etFirstNumber);
    etsecond = (EditText) findViewById(R.id.etSecondNumber);
    tvresult = (TextView) findViewById(R.id.tvResult);

    btnAdd.setOnClickListener(this);
    btnSubtract.setOnClickListener(this);
    btnMultiply.setOnClickListener(this);
    btnDivide.setOnClickListener(this);
}

@Override
public void onClick(View view) {
    String num1 = etfirst.getText().toString();
    String num2 = etsecond.getText().toString();
    switch (view.getId()) {
        case R.id.btnAdd:
            int addition = Integer.parseInt(num1) + Integer.parseInt(num2);
            tvresult.setText(String.valueOf(addition));
            break;
        case R.id.btnSubtract:
            int subtraction = Integer.parseInt(num1) - Integer.parseInt(num2);
            tvresult.setText(String.valueOf(subtraction));
            break;
        case R.id.btnMultiply:
            int multiply = Integer.parseInt(num1) * Integer.parseInt(num2);
            tvresult.setText(String.valueOf(multiply));
            break;
        case R.id.btnDivide:
            try {
                int division = Integer.parseInt(num1) / Integer.parseInt(num2);
                tvresult.setText(String.valueOf(division));

            } catch (Exception e) {
                tvresult.setText("Cannot Divide!");
            }
            break;
        }
    }
}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity"> <EditText    android:id="@+id/editText"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:ems="10"    android:inputType="textPersonName"    android:text="My Basic Calculator"    tools:layout_editor_absoluteX="102dp"    tools:layout_editor_absoluteY="4dp"    tools:textColor="#008888" /> <TextView    android:id="@+id/textView"    android:layout_width="89dp"    android:layout_height="22dp"    android:text="First number:"    android:textStyle="normal|bold|italic"    tools:layout_editor_absoluteX="7dp"    tools:layout_editor_absoluteY="83dp" /> <TextView    android:id="@+id/textView2"    android:layout_width="135dp"    android:layout_height="19dp"    android:text="Second Number:"    android:textStyle="normal|bold|italic"    tools:layout_editor_absoluteX="213dp"    tools:layout_editor_absoluteY="83dp" /> <EditText    android:id="@+id/etFirstNumber"    android:layout_width="163dp"    android:layout_height="wrap_content"    android:ems="10"    android:inputType="numberDecimal"    tools:layout_editor_absoluteX="0dp"    tools:layout_editor_absoluteY="117dp" /> <EditText    android:id="@+id/etSecondNumber"    android:layout_width="176dp"    android:layout_height="wrap_content"    android:ems="10"    android:inputType="numberDecimal"    tools:layout_editor_absoluteX="205dp"    tools:layout_editor_absoluteY="117dp" /> <TextView    android:id="@+id/textView3"    android:layout_width="98dp"    android:layout_height="25dp"    android:text="Your result:"    android:textStyle="normal|bold|italic"    tools:layout_editor_absoluteX="7dp"    tools:layout_editor_absoluteY="207dp" /> <LinearLayout    android:layout_width="368dp"    android:layout_height="217dp"    android:orientation="horizontal"    tools:layout_editor_absoluteX="8dp"    tools:layout_editor_absoluteY="286dp"> </LinearLayout> <Button    android:id="@+id/btnAdd"    android:layout_width="85dp"    android:layout_height="52dp"    android:text="+"    tools:layout_editor_absoluteX="20dp"    tools:layout_editor_absoluteY="296dp" /> <Button    android:id="@+id/btnSubtract"    android:layout_width="85dp"    android:layout_height="52dp"    android:text="-"    tools:layout_editor_absoluteX="105dp"    tools:layout_editor_absoluteY="296dp" /> <Button    android:id="@+id/btnMultiply"    android:layout_width="85dp"    android:layout_height="52dp"    android:text="*"    tools:layout_editor_absoluteX="190dp"    tools:layout_editor_absoluteY="296dp" /> <Button    android:id="@+id/btnDivide"    android:layout_width="85dp"    android:layout_height="52dp"    android:text="÷ "    tools:layout_editor_absoluteX="275dp"    tools:layout_editor_absoluteY="296dp" /> <EditText    android:id="@+id/tvResult"    android:layout_width="232dp"    android:layout_height="wrap_content"    android:ems="10"    android:inputType="textPersonName"    tools:layout_editor_absoluteX="7dp"    tools:layout_editor_absoluteY="231dp" /> </android.support.constraint.ConstraintLayout>

[Norm Radder]

Whenever I put in a floating number, even with only one decimal, the program crashes.

Can you copy the section of the logcat where the error message is shown and paste it here?
It should show the source line number and the name of the method that was called.

Where is the parse method for floating numbers?  I only see the parseInt method which is for integers.