package com.mycompany.myapp;  
import android.app.*;  
import android.os.*;  
import android.view.*;  
import android.widget.*;  
import android.content.*;  
public class MainActivity extends Activity  
{  
	EditText ed1,ed2,ed3 ;  
	double a,b,hasil ;  
	/** Called when the activity is first created. */  
	@Override  
	public void onCreate(Bundle savedInstanceState)  
	{  
		super.onCreate(savedInstanceState);  
		setContentView(R.layout.main);  
	ed1 = (EditText)findViewById(R.id.ed1);  
	ed2 = (EditText)findViewById(R.id.ed2);  
	ed3 = (EditText)findViewById(R.id.ed3);  
	Button btn = (Button) findViewById(R.id.bt1);  
   btn setOnCreateContextMenuListener(this);  
	}  
	public void ambil(){  
		a = Integer.parseInt(ed1.getText().toString());  
		b = Integer.parseInt(ed2.getText().toString());  
	}  
	public void kali(View v){  
		ambil();  
		hasil = a * b ;  
        ed3.setText(hasil+"");  
	}  
	public void tambah(View v){  
		ambil();  
		hasil = a + b ;  
        ed3.setText(hasil+"");  
	}
	public void bagi(View v){  
		ambil();  
		hasil = a / b ;  
        ed3.setText(hasil+"");  
	}
	public void kurang(View v){  
		ambil();  
		hasil = a - b ;  
        ed3.setText(hasil+"");  
	}
}