package com.mycompany.myapp;
import android.app.*;
import android.os.*;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity implements View.OnClickListener{
    Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn = findViewById(R.id.btn1);
		btn.setOnClickListener(this);
    }
	@Override
	public void onClick(View view){
       Toast.makeText(getApplicationContext(),"Button was Clicked",Toast.LENGTH_SHORT).show();
	}
}