Android Button with Examples

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="40dp"
    android:orientation="vertical" android:id="@+id/linearlayout" >

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Normal Button"
        android:width="200dp"
        android:textSize="16sp"
        android:layout_marginBottom="20dp"
        android:textStyle="normal|bold" />
    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Color Button"
        android:width="200dp"
        android:textSize="16sp"
        android:background="#3366ff"
        android:textColor="#ffffff"
        android:textStyle="normal|bold" />
</LinearLayout>

MainActivity.java

package com.example.button;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    Button btn;
    Button btn1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn = (Button)findViewById(R.id.btn);
        btn1 = (Button)findViewById(R.id.btn1);
    }
}