Arrays

package wks.android;

import java.util.Arrays;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class GameFindActivity extends Activity {
	private int total=7;
	private Button[] number_btn = {null,null,null,null,null,null,null};
	private int[] btn = {R.id.button1,R.id.button2,R.id.button3,R.id.button4,
			     R.id.button5,R.id.button6,R.id.button7};
        private ImageView[] iv = {null,null,null,null,null,null,null};
        private TextView  tv1;

    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        setContentView(R.layout.gamefind);

        tv1 = (TextView)findViewById( R.id.textView1 );

        number_btn [0] = (Button)findViewById( R.id.button1 );
        number_btn [1] = (Button)findViewById( R.id.button2 );
        number_btn [2] = (Button)findViewById( R.id.button3 );
        number_btn [3] = (Button)findViewById( R.id.button4 );
        number_btn [4] = (Button)findViewById( R.id.button5 );
        number_btn [5] = (Button)findViewById( R.id.button6 );
        number_btn [6] = (Button)findViewById( R.id.button7 );

        iv [0] = (ImageView)findViewById( R.id.imageView1 );
        iv [1] = (ImageView)findViewById( R.id.imageView2 );
        iv [2] = (ImageView)findViewById( R.id.imageView3 );
        iv [3] = (ImageView)findViewById( R.id.imageView4 );
        iv [4] = (ImageView)findViewById( R.id.imageView5 );
        iv [5] = (ImageView)findViewById( R.id.imageView6 );
        iv [6] = (ImageView)findViewById( R.id.imageView7 );

        for(int i = 0 ; i < number_btn.length ; i ++ )
        {
        	number_btn[i].setOnClickListener( number_event ) ;
        }
    }


    private OnClickListener number_event = new OnClickListener()
    {
    	public void onClick( View v )
    	{
    		total--;
        	tv1.setText("目前剩" + String.valueOf(total) + "個");
                iv[Arrays.binarySearch(btn, v.getId())].setVisibility(View.VISIBLE);
        	((Button)v).layout(0, 0, 0, 0);
        	if(total == 0)
        	{
        		tv1.setText("已全找到:D");
        		Intent intent = new Intent() ;
        		intent.setClass(GameFindActivity.this, GameFind2Activity.class) ;
        		startActivity(intent) ;
        	}
    	}
    };
}