Android Display multiplication table of a number

Android  Display multiplication table of a number

In this Tutorial Android  Display multiplication table of a number follow this tutorial

 1. activity_main.xml:

<!-- First make the layout file xml and add button, edit text, text view -->

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.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"

tools:layout_editor_absoluteY="25dp">

<!-- Add the button for run table logic and print result-->

<!-- give id "button"-->

<Button

android:id="@+id/button"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="16dp"

android:text="TABLE"

app:layout_constraintEnd_toEndOf="parent"

app:layout_constraintStart_toEndOf="@+id/editText"

app:layout_constraintTop_toTopOf="parent" />

<!-- Text view for result view-->

<!-- give the id TextView-->

<TextView

android:id="@+id/textView"

android:layout_width="0dp"

android:layout_height="0dp"

android:layout_marginBottom="18dp"

android:layout_marginEnd="36dp"

android:layout_marginLeft="36dp"

android:layout_marginRight="36dp"

android:layout_marginStart="36dp"

android:textColor="@color/colorPrimary"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintEnd_toEndOf="parent"

app:layout_constraintStart_toStartOf="parent"

app:layout_constraintTop_toBottomOf="@+id/editText" />

<!-- edit Text for take input from user-->

<!-- give the id editText-->

<EditText

android:id="@+id/editText"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginBottom="20dp"

android:layout_marginEnd="9dp"

android:layout_marginRight="9dp"

android:layout_marginTop="16dp"

android:ems="10"

android:inputType="number"

app:layout_constraintBottom_toTopOf="@+id/textView2"

app:layout_constraintEnd_toStartOf="@+id/button"

app:layout_constraintHorizontal_chainStyle="packed"

app:layout_constraintStart_toStartOf="parent"

app:layout_constraintTop_toTopOf="parent"

tools:ignore="UnknownId" />

</android.support.constraint.ConstraintLayout>

2.MainActivity.java:

// Build the java logic for multiplication table

// using button, text view, edit text

package com.example.windows10.table;

import android.app.Dialog;

import android.content.Intent;

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 {

// define the global variable

// variable number1, number2 for input input number

// Add_button, result textView

EditText editText;

Button button;

TextView result;

int ans = 0;

protected void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// by ID we can use each component

// whose id is assigned in the XML file

editText = (EditText)findViewById(R.id.editText);

button = (Button)findViewById(R.id.button);

result = (TextView)findViewById(R.id.textView);

// set clickListener on button

button.setOnClickListener(this);

}

@Override

public void onClick(View v)

{

switch (v.getId()) {

case R.id.button:

StringBuffer buffer = new StringBuffer();

int res;

// get the input number from editText

String fs = editText.getText().toString();

// convert it to integer

int n = Integer.parseInt(fs);

// build the logic for table

for (int i = 1; i <= 10; i++) {

ans = (i * n);

buffer.append(n + " X " + i

+ " = " + ans + "\n\n");

}

// set the buffer textview

result.setText(buffer);

break;

}

}

}