Button Example 2

MainActivity.java

package com.blogspot.csdevbin.mynewpractice;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

   
@Override
   
protected void onCreate(Bundle savedInstanceState) {
       
super.onCreate(savedInstanceState);
        setContentView(R.layout.
activity_main);
        B1();
    }
   
private void B1() {
        Button b1 = (Button) findViewById(R.id.
button1);

        b1.setOnClickListener(
new View.OnClickListener() {
           
@Override
           
public void onClick(View v) {

                Toast.makeText(getApplication(),
"Button 1 clicked",Toast.LENGTH_LONG).show();

            }
        });
    }
}


 activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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="com.blogspot.csdevbin.mynewpractice.MainActivity"
   
   
<Button
       
android:layout_width="wrap_content"
       
android:layout_height="wrap_content"
       
android:text="B1"
       
android:clickable="true"
       
android:id="@+id/button1"
       
android:layout_below="@+id/textView"
       
android:layout_marginTop="54dp"
       
android:layout_alignParentRight="true"
       
android:layout_alignParentEnd="true"
       
android:layout_alignParentLeft="true"
       
android:layout_alignParentStart="true" />
</
RelativeLayout>





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