Calculator App In Android Studio With Source Code || Androidpro App Builders Androidpro.in

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In this post we are show how to create a calculator with complete  source code and guide step by step.

 

MainActivity.Java

package in.apps.androidpro.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.TypedValue;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    
private Button b1;
    
private Button b2;
    
private Button b3;
    
private Button b4;
    
private Button b5;
    
private Button b6;
    
private Button b7;
    
private Button b8;
    
private Button b9;
    
private Button b0;
    
private Button b_equal;
    
private Button b_multi;
    
private Button b_divide;
    
private Button b_add;
    
private Button b_sub;
    
private Button b_clear;
    
private Button b_dot;
    
private Button b_para1;
    
private Button b_para2;
    
private TextView t1;
    
private TextView t2;
    
private final char ADDITION '+';
    
private final char SUBTRACTION '-';
    
private final char MULTIPLICATION '*';
    
private final char DIVISION '/';
    
private final char EQU '=';
    
private final char EXTRA '@';
    
private final char MODULUS '%';
    
private char ACTION;
    
private double val1 = Double.NaN;
    
private double val2;
    
@Override
    
protected void onCreate(Bundle savedInstanceState) {
        
super.onCreate(savedInstanceState);
        setContentView(R.layout.
activity_main);
        viewSetup();

        
b1.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "1");
            }
        });

        
b2.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "2");
            }
        });

        
b3.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "3");
            }
        });

        
b4.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "4");
            }
        });

        
b5.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "5");
            }
        });

        
b6.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "6");
            }
        });

        
b7.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "7");
            }
        });

        
b8.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "8");
            }
        });

        
b9.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "9");
            }
        });

        
b0.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                ifErrorOnOutput();
                exceedLength();
                
t1.setText(t1.getText().toString() + "0");
            }
        });

        
b_dot.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                exceedLength();
                
t1.setText(t1.getText().toString() + ".");
            }
        });

        
b_para1.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                
if (t1.getText().length() > 0) {
                    
ACTION MODULUS;
                    operation();
                    
if (!ifReallyDecimal()) {
                        
t2.setText(val1 "%");
                    
else {
                        
t2.setText((intval1 "%");
                    }
                    
t1.setText(null);
                
else {
                    
t2.setText("Error");
                }
            }
        });

        
b_add.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                
if (t1.getText().length() > 0) {
                    
ACTION ADDITION;
                    operation();
                    
if (!ifReallyDecimal()) {
                        
t2.setText(val1 "+");
                    
else {
                        
t2.setText((intval1 "+");
                    }
                    
t1.setText(null);
                
else {
                    
t2.setText("Error");
                }
            }
        });

        
b_sub.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                
if (t1.getText().length() > 0) {
                    
ACTION SUBTRACTION;
                    operation();
                    
if (t1.getText().length() > 0)
                        
if (!ifReallyDecimal()) {
                            
t2.setText(val1 "-");
                        
else {
                            
t2.setText((intval1 "-");
                        }
                    
t1.setText(null);
                
else {
                    
t2.setText("Error");
                }
            }
        });

        
b_multi.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                
if (t1.getText().length() > 0) {
                    
ACTION MULTIPLICATION;
                    operation();
                    
if (!ifReallyDecimal()) {
                        
t2.setText(val1 "×");
                    
else {
                        
t2.setText((intval1 "×");
                    }
                    
t1.setText(null);
                
else {
                    
t2.setText("Error");
                }
            }
        });

        
b_divide.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                
if (t1.getText().length() > 0) {
                    
ACTION DIVISION;
                    operation();
                    
if (ifReallyDecimal()) {
                        
t2.setText((intval1 "/");
                    
else {
                        
t2.setText(val1 "/");
                    }
                    
t1.setText(null);
                
else {
                    
t2.setText("Error");
                }
            }
        });

        
b_para2.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                
if (!t2.getText().toString().isEmpty() || !t1.getText().toString().isEmpty()) {
                    
val1 = Double.parseDouble(t1.getText().toString());
                    
ACTION EXTRA;
                    
t2.setText("-" t1.getText().toString());
                    
t1.setText("");
                
else {
                    
t2.setText("Error");
                }
            }
        });

        
b_equal.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                
if (t1.getText().length() > 0) {
                    operation();
                    
ACTION EQU;
                    
if (!ifReallyDecimal()) {
                        
t2.setText(/*t2.getText().toString() + String.valueOf(val2) + "=" + */String.valueOf(val1));
                    
else {
                        
t2.setText(/*t2.getText().toString() + String.valueOf(val2) + "=" + */String.valueOf((intval1));
                    }
                    
t1.setText(null);
                
else {
                    
t2.setText("Error");
                }
            }
        });

        
b_clear.setOnClickListener(new View.OnClickListener() {
            
@Override
            
public void onClick(View view) {
                
if (t1.getText().length() > 0) {
                    CharSequence name = 
t1.getText().toString();
                    
t1.setText(name.subSequence(0, name.length() - 1));
                
else {
                    
val1 = Double.NaN;
                    
val2 = Double.NaN;
                    
t1.setText("");
                    
t2.setText("");
                }
            }
        });

        
// Empty text views on long click.
        
b_clear.setOnLongClickListener(new View.OnLongClickListener() {
            
@Override
            
public boolean onLongClick(View view) {
                
val1 = Double.NaN;
                
val2 = Double.NaN;
                
t1.setText("");
                
t2.setText("");
                
return true;
            }
        });
    }

    
private void viewSetup() {
        
b1 = findViewById(R.id.button1);
        
b2 = findViewById(R.id.button2);
        
b3 = findViewById(R.id.button3);
        
b4 = findViewById(R.id.button4);
        
b5 = findViewById(R.id.button5);
        
b6 = findViewById(R.id.button6);
        
b7 = findViewById(R.id.button7);
        
b8 = findViewById(R.id.button8);
        
b9 = findViewById(R.id.button9);
        
b0 = findViewById(R.id.button0);
        
b_equal = findViewById(R.id.button_equal);
        
b_multi = findViewById(R.id.button_multi);
        
b_divide = findViewById(R.id.button_divide);
        
b_add = findViewById(R.id.button_add);
        
b_sub = findViewById(R.id.button_sub);
        
b_clear = findViewById(R.id.button_clear);
        
b_dot = findViewById(R.id.button_dot);
        
b_para1 = findViewById(R.id.button_para1);
        
b_para2 = findViewById(R.id.button_para2);
        
t1 = findViewById(R.id.input);
        
t2 = findViewById(R.id.output);
    }

    
private void operation() {
        
if (!Double.isNaN(val1)) {
            
if (t2.getText().toString().charAt(0) == '-') {
                
val1 = (-1) * val1;
            }
            
val2 = Double.parseDouble(t1.getText().toString());

            
switch (ACTION) {
                
case ADDITION:
                    
val1 val1 val2;
                    
break;
                
case SUBTRACTION:
                    
val1 val1 val2;
                    
break;
                
case MULTIPLICATION:
                    
val1 val1 val2;
                    
break;
                
case DIVISION:
                    
val1 val1 val2;
                    
break;
                
case EXTRA:
                    
val1 = (-1) * val1;
                    
break;
                
case MODULUS:
                    
val1 val1 val2;
                    
break;
                
case EQU:
                    
break;
            }
        
else {
            
val1 = Double.parseDouble(t1.getText().toString());
        }
    }

    
// Remove error message that is already written there.
    
private void ifErrorOnOutput() {
        
if (t2.getText().toString().equals("Error")) {
            
t2.setText("");
        }
    }

    
// Whether value if a double or not
    
private boolean ifReallyDecimal() {
        
return val1 == (intval1;
    }

    
private void noOperation() {
        String inputExpression = 
t2.getText().toString();
        
if (!inputExpression.isEmpty() && !inputExpression.equals("Error")) {
            
if (inputExpression.contains("-")) {
                inputExpression = inputExpression.replace(
"-""");
                
t2.setText("");
                
val1 = Double.parseDouble(inputExpression);
            }
            
if (inputExpression.contains("+")) {
                inputExpression = inputExpression.replace(
"+""");
                
t2.setText("");
                
val1 = Double.parseDouble(inputExpression);
            }
            
if (inputExpression.contains("/")) {
                inputExpression = inputExpression.replace(
"/""");
                
t2.setText("");
                
val1 = Double.parseDouble(inputExpression);
            }
            
if (inputExpression.contains("%")) {
                inputExpression = inputExpression.replace(
"%""");
                
t2.setText("");
                
val1 = Double.parseDouble(inputExpression);
            }
            
if (inputExpression.contains("×")) {
                inputExpression = inputExpression.replace(
"×""");
                
t2.setText("");
                
val1 = Double.parseDouble(inputExpression);
            }
        }
    }

    
// Make text small if too many digits.
    
private void exceedLength() {
        
if (t1.getText().toString().length() > 10) {
            
t1.setTextSize(TypedValue.COMPLEX_UNIT_SP20);
        }
    }
}

 

Step 2 ActivityMain.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   
xmlns:app="http://schemas.android.com/apk/res-auto"
   
xmlns:tools="http://schemas.android.com/tools"
   
android:layout_width="match_parent"
   
android:layout_height="match_parent"
   
android:background="#000"
   
tools:context=".MainActivity">


    <
Button
      
android:id="@+id/button1"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="1"
       
android:textColor="#ffff"
        
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.043"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.817" />

    <
Button
       
android:id="@+id/button2"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="2"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.352"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.817" />

    <
Button
       
android:id="@+id/button3"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="3"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.672"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.817" />

    <
Button
       
android:id="@+id/button4"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="4"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.043"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.677" />

    <
Button
       
android:id="@+id/button5"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="5"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.352"
        
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.677" />

    <
Button
       
android:id="@+id/button6"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="6"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.672"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.677" />

    <
Button
       
android:id="@+id/button7"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="7"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.043"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.541" />

    <
Button
       
android:id="@+id/button8"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="8"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.352"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.541" />

    <
Button
       
android:id="@+id/button9"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="9"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.672"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.541" />

    <
Button
       
android:id="@+id/button0"
       
android:layout_width="185dp"
       
android:layout_height="80dp"
       
android:background="@drawable/new_but"
       
android:paddingRight="95sp"
       
android:text="0"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.061"
       
app:layout_constraintStart_toStartOf="parent"
        
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.957" />

    <
Button
       
android:id="@+id/button_equal"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/arithmatic_button"
       
android:text="="
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.99"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.958" />

    <
Button
       
android:id="@+id/button_multi"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/arithmatic_button"
       
android:text="×"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.99"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.541" />

    <
Button
       
android:id="@+id/button_divide"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/arithmatic_button"
       
android:text="/"
       
android:textColor="#ffff"
        
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.987"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.406" />

    <
Button
       
android:id="@+id/button_add"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/arithmatic_button"
       
android:text="+"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.99"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.817" />

    <
Button
       
android:id="@+id/button_sub"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/arithmatic_button"
       
android:text="-"
       
android:textColor="#ffff"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
        
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.99"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.677" />

    <
Button
       
android:id="@+id/button_clear"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/button"
       
android:text="AC"
       
android:textColor="#060606"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.043"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.406" />

    <
Button
       
android:id="@+id/button_para1"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/button"
       
android:text="%"
       
android:textColor="#060606"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.672"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.406" />

    <
Button
       
android:id="@+id/button_para2"
        
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/button"
       
android:text="+/-"
       
android:textColor="#060606"
       
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.349"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.406" />

    <
Button
       
android:id="@+id/button_dot"
       
android:layout_width="80dp"
       
android:layout_height="80dp"
       
android:background="@drawable/circle_button"
       
android:text="."
       
android:textColor="#ffff"
        
android:textSize="28sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.671"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.958" />

    <
TextView
       
android:id="@+id/input"
       
android:layout_width="wrap_content"
       
android:layout_height="wrap_content"
       
android:textColor="@android:color/background_light"
       
android:textSize="68sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.909"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.252" />

    <
TextView
       
android:id="@+id/output"
       
android:layout_width="wrap_content"
       
android:layout_height="wrap_content"
       
android:textColor="@android:color/background_light"
       
android:textSize="36sp"
       
app:layout_constraintBottom_toBottomOf="parent"
       
app:layout_constraintEnd_toEndOf="parent"
       
app:layout_constraintHorizontal_bias="0.909"
       
app:layout_constraintStart_toStartOf="parent"
       
app:layout_constraintTop_toTopOf="parent"
       
app:layout_constraintVertical_bias="0.051" />

</
androidx.constraintlayout.widget.ConstraintLayout>

 

 

Step 3 arithmatic_button.xml (drawable)

 

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <
item android:state_pressed="false">
        <
shape android:shape="oval">
            <
solid android:color="#fe9500"/>
        </
shape>
    </
item>
    <
item android:state_pressed="true">
        <
shape android:shape="oval">
            <
solid android:color="#fe9500"/>
        </
shape>
    </
item>
</
selector>

 

Step 4 button.xml (drawable)
 
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <
item android:state_pressed="false">
        <
shape android:shape="oval">
            <
solid android:color="#a5a5a1"/>
        </
shape>
    </
item>
    <
item android:state_pressed="true">
        <
shape android:shape="oval">
            <
solid android:color="#a5a5a5"/>
        </
shape>
    </
item>
</
selector>
 
Step 5 circle_button.xml (drawable)
 
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <
item android:state_pressed="false">
        <
shape android:shape="oval">
            <
solid android:color="#323232"/>
        </
shape>
    </
item>
    <
item android:state_pressed="true">
        <
shape android:shape="oval">
            <
solid android:color="#323232"/>
        </
shape>
    </
item> </selector>
 
Step 3 new_but.xml (drawable)
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners
        android:bottomRightRadius="50dp"
        android:topRightRadius="50dp"
        android:bottomLeftRadius="50dp"
        android:topLeftRadius="50dp"/>
    <solid android:color="#323232" />
</
shape>
 

Now Run Your Project

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