Button not working in android app?

Question

I'm building an app which has 3 functions a converter, a calculator and a notes section. When I click on the converter button on the home page it brings me to the converter activity / page. But when I click on the calculator button on the home page it won't open. Here is the code below. Any reason as to why? Thanks in advance.

MainActivity

package com.qub.buildersbuddy;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

    Button buttonConverter; 
    Button buttonCalculator;
    Button buttonNotePad;



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

        Button ConvertBtn = (Button) findViewById(R.id.butonConverter);
        ConvertBtn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this,CentInch.class);
                startActivity(intent);

            }
        });

    }

    public void setupConverterButton(){
        buttonConverter = (Button) findViewById(R.id.butonConverter);
        // Button messageButton = (Button) findViewById(R.id.butonConverter);

}

    public void CentToInch(){
        buttonConverter.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                //opening the
                try{
                    Class centClass = Class
                            .forName("com.qub.buildersbuddy.CentInch");
                    Intent myintent = new Intent(MainActivity.this,centClass);
            startActivity(myintent);
                }catch (ClassNotFoundException e){
                    e.printStackTrace();

                }

            }
    });

}

protected void onCreate1(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button CalcBtn = (Button) findViewById(R.id.buttonCalc);
    CalcBtn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent intent = new Intent(MainActivity.this,Calculator.class);
            startActivity(intent);

        }
    });

}

public void setupCalculatorButton(){
    buttonCalculator = (Button) findViewById(R.id.buttonCalc);
    // Button messageButton = (Button) findViewById(R.id.butonConverter);

}

public void Calculator(){
    buttonCalculator.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            //opening the
            try{
                Class calcClass = Class
                        .forName("com.qub.buildersbuddy.Calculator");
                Intent myintent = new Intent(MainActivity.this,calcClass);
        startActivity(myintent);
            }catch (ClassNotFoundException e){
                e.printStackTrace();

            }

        }
});

}
}

activity_main:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".CentInch" >

    <Button
        android:id="@+id/butonConverter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="62dp"
        android:text="Converter" />



    <Button
        android:id="@+id/buttonCalc"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/butonConverter"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="28dp"
        android:text="Calculator" />

    <Button
        android:id="@+id/buttonNotes"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/buttonCalc"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="31dp"
        android:text="Notes" />

</RelativeLayout>

Answer 1

Is this the exact code you're using? Your #onCreate1 method will never get called. #onCreate gets called because it overrides a method from the class you extended (Activity), and something in Activity calls the method when the activity first starts. Move your calculator button logic into the first #onCreate method.