ANDROID EVENT HANDLING TEXT CHANGE WITH TOST ON BUTTON CLICK

ANDROID EVENT HANDLING TEXT CHANGE WITH TOST ON BUTTON CLICK

MAIN ACTIVITY.JAVA

package com.httptesting.testing;

import android.app.Activity;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

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

        Button bone=(Button)findViewById(R.id.buttonOne);
        Button btwo=(Button)findViewById(R.id.buttonTwo);


        bone.setOnClickListener(
                new  Button.OnClickListener()
                {
                    public void onClick(View view)
                    {
                        TextView tv=(TextView)findViewById(R.id.textViewOne);
                        tv.setText("first");
                        Toast.makeText(getApplicationContext(),"first button", Toast.LENGTH_SHORT).show();
                    }
                }
        );
        btwo.setOnClickListener(
                new  Button.OnClickListener()
                {
                    public void onClick(View v)
                    {

                        TextView tv=(TextView)findViewById(R.id.textViewOne);
                        tv.setText("second");
                        Toast.makeText(getApplicationContext(),"second", Toast.LENGTH_SHORT).show();
                    }
                }

        );

    };
}

,XML FILE

<?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.httptesting.testing.MainActivity">

    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textAppearance="?android:attr/textAppearanceLarge"        android:text="Text Display Here"        android:id="@+id/textViewOne"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="47dp" />

    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/button_one"        android:id="@+id/buttonOne"        android:layout_below="@+id/textViewOne"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:layout_marginLeft="32dp"        android:layout_marginStart="32dp"        android:layout_marginTop="48dp"        android:onClick="bone" />

    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/button_two"        android:id="@+id/buttonTwo"        android:layout_alignBottom="@+id/buttonOne"        android:layout_alignParentRight="true"        android:layout_alignParentEnd="true"        android:onClick="btwo" />
</RelativeLayout>