Android 반짝이는 화면

package com.example.androidtest0222;

 

import android.R.bool;

import android.app.Activity;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.os.Bundle;

import android.os.Handler;

import android.util.AttributeSet;

import android.view.Menu;

import android.view.View;

import android.widget.RelativeLayout;

 

public class MainActivity extends Activity {

 

      RelativeLayout backLayout;

 

      @Override

      protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_main);

      }

 

      @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;

      }

 

}

 

class MyView extends View {

      public MyView(Context context) {

            super(context);

      }

      public MyView(Context context, AttributeSet attri) {

            super(context, attri);

            mHandler.sendEmptyMessageDelayed(0, 500);

      }

      boolean flag = false;

      @Override

      protected void onDraw(Canvas canvas) {

            // TODO Auto-generated method stub

            if(flag)

            {

                  canvas.drawColor(Color.YELLOW);

                  flag = !flag;

            }

            else

            {

                  canvas.drawColor(Color.GREEN);

                  flag = !flag;

            }

            super.onDraw(canvas);

      }

      Handler mHandler = new Handler()

      {

            public void handleMessage(android.os.Message msg) {

                  invalidate();

                  mHandler.sendEmptyMessageDelayed(0, 500);

            };

      };

}