Creating Subtraction App in Android Studio using Java and xml.
1. Creating Subtraction
App in Android Studio
using Java and xml.
xml code for design:-
<?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"
tools:context=".MainActivity">
<EditText
android:id="@+id/etNum1"
android:layout_width="93dp"
android:layout_height="43dp"
android:ems="10"
android:inputType="number"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.817"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.229" />
<EditText
android:id="@+id/etNum2"
android:layout_width="95dp"
android:layout_height="45dp"
android:ems="10"
android:inputType="number"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.825"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.399" />
<Button
android:id="@+id/btnSub"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SUBMIT"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/etNum2"
app:layout_constraintVertical_bias="0.276" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:textColor="#2196F3"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.801" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SIUBTRACTION"
android:textColor="#009688"
android:textSize="30sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/etNum1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:autoLink="all"
android:text="@webandroi2021"
android:textColor="#E91E63"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView4" />
<TextView
android:id="@+id/textView6"
android:layout_width="210dp"
android:layout_height="45dp"
android:layout_marginBottom="72dp"
android:ellipsize="none"
android:text="First Number : "
android:textAlignment="textStart"
android:textAllCaps="false"
android:textColor="#673AB7"
android:textSize="24sp"
app:autoSizeTextType="none"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/etNum1"
app:layout_constraintHorizontal_bias="0.32"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.257" />
<TextView
android:id="@+id/textView7"
android:layout_width="210dp"
android:layout_height="45dp"
android:ellipsize="none"
android:text="Second Number : "
android:textColor="#673AB7"
android:textSize="24sp"
app:autoSizeTextType="none"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/etNum2"
app:layout_constraintHorizontal_bias="0.313"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.399" />
</androidx.constraintlayout.widget.ConstraintLayout>
Java code to perform action:-
package com.example.sub;
import androidx.appcompat.app.AppCompatActivity;
import org.w3c.dom.Text;
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 {
private EditText num1;
private EditText num2;
private Button sub;
private TextView result;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
num1 = (EditText)findViewById(R.id.etNum1);
num2 = (EditText)findViewById(R.id.etNum2);
sub = (Button) findViewById(R.id.btnSub);
result = (TextView)findViewById(R.id.textView4);
sub.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int value1 = Integer.parseInt(num1.getText().toString());
int value2 = Integer.parseInt(num2.getText().toString());
int sub=value1-value2;
result.setText("Answer is : " + String.valueOf(sub));
}
});
}
}
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