Android - ต้องการให้กดปุ่มแล้ว Random ครั้งเดียวทำไงครับ กดปุ่มครั้งต่อไปให้มันไม่ต้องRandomอีก

package com.example.logic1;

import java.util.Random;

import android.R.string;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity
{

	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		final TextView head = (TextView) findViewById(R.id.TextView1);
		final TextView in1 = (TextView) findViewById(R.id.Edit1);
		final TextView in2 = (TextView) findViewById(R.id.Edit2);
		final TextView in3 = (TextView) findViewById(R.id.Edit3);
		final TextView in4 = (TextView) findViewById(R.id.Edit4);
		final TextView out1 = (TextView) findViewById(R.id.Text1);
		final Button but1 = (Button) findViewById(R.id.but1);

		
		but1.setOnClickListener(new View.OnClickListener()
		{

			@Override
			public void onClick(View v)
			{
				/*
				Random random = new Random();
				int[] s = new int[4];
				s[0] = random.nextInt(10);
				s[1] = random.nextInt(10);
				while (s[1] == s[0])
				{
					s[1] = random.nextInt(10);
				}
				s[2] = random.nextInt(10);
				while (s[2] == s[1] || s[2] == s[0])
				{
					s[2] = random.nextInt(10);
				}
				s[3] = random.nextInt(10);
				while (s[3] == s[1] || s[3] == s[0] || s[3] == s[2])
				{
					s[3] = random.nextInt(10);
				}
				*/
				int[] s = new int[4];
				int a, b, c, d, count = 0, count1 = 0, count2 = 0;
				out1.append("Random = "+s[0]+s[1]+s[2]+s[3]);
				head.setText("กรุณาใส่ตัวเลข");
				String b1 = in1.getText().toString();
				String b2 = in2.getText().toString();
				String b3 = in3.getText().toString();
				String b4 = in4.getText().toString();
				if (b1.length() == 0 || b2.length() == 0 || b3.length() == 0
						|| b4.length() == 0)
				{
					head.setText("กรุณาใส่ตัวเลข");
					return;
				}
				a = Integer.parseInt(b1);
				b = Integer.parseInt(b2);
				c = Integer.parseInt(b3);
				d = Integer.parseInt(b4);

				{
					count1 = 0;
					count = 0;
					while (count == 0)
					{
						if (a == s[0])
						{
							out1.append("X");
							count = 1;
							count1 = count1 + 1;
							break;
						}
						if (a == s[1])
						{
							out1.append("/");
							count = 1;
							break;
						}
						if (a == s[2])
						{
							out1.append("/");
							count = 1;
							break;
						}
						if (a == s[3])
						{
							out1.append("/");
							count = 1;
							break;
						} else
						{
							break;
						}
					}
					
				}
				count = 0;
				while (count == 0)
				{
					if (b == s[0])
					{
						out1.append("/");
						count = 1;
						break;
					}
					if (b == s[1])
					{
						out1.append("X");
						count1 = count1 + 1;
						count = 1;
						break;
					}
					if (b == s[2])
					{
						out1.append("/");
						count = 1;
						break;
					}
					if (b == s[3])
					{
						out1.append("/");
						count = 1;
						break;
					} else
					{
						break;
					}
				}
				count = 0;
				while (count == 0)
				{
					if (c == s[0])
					{
						out1.append("/");
						count = 1;
						break;
					}
					if (c == s[1])
					{
						out1.append("/");
						count = 1;
						break;
					}
					if (c == s[2])
					{
						out1.append("X");
						count1 = count1 + 1;
						count = 1;
						break;
					}
					if (c == s[3])
					{
						out1.append("/");
						count = 1;
						break;
					}
					else
					{
						break;
					}
				}
				count = 0;
				while (count == 0)
				{
					if (d == s[0])
					{
						out1.append("/");
						count = 1;
						break;
					}
					if (d == s[1])
					{
						out1.append("/");
						count = 1;
						break;
					}
					if (d == s[2])
					{
						out1.append("/");
						count = 1;
						break;
					}
					if (d == s[3])
					{
						out1.append("X");
						count1 = count1 + 1;
						count = 1;
						break;
					} 
					else
					{
						break;
					}
				}
				if (count1 == 4)
				{
					out1.append("\nPoint = " + count2 + 1 + "\n");
					return;
				}
			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu)
	{
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item)
	{
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings)
		{
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
}