android 继承view类刷新页面【安卓进化十一】

最近做项目中发现，继承了view类的子类，可以用invalidate方法刷新，或者用hanlder消息机制和线程来处理，或者直接在线程中用postInvalidate来处理，但是继承了surface的子类，就不可以用invalidate方法来刷新界面。我写了个简单刷新界面加载图片的demo，先看效果图：

程序图：没有点击事件 点击男生前面圆圈的效果，再次点击消失

点击矩形区域：下箭头 效果图：数字改变

点击矩形区域： 上箭头数字改变，增加：

一、MainActivity类的代码：

package com.cn.android;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends Activity {
   
 public static final int REFRESH = 0;
 public static final int RETURN = 1;
 public static final int REGAIN = 2;
 
 GameView mGameView = null;// = new GameView(this,this);
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
  getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN ,  
                       WindowManager.LayoutParams.FLAG_FULLSCREEN);
        this.initGameView();
        new Thread(new GameThread()).start();
    }
  
    Handler mHandler=new Handler(){
  public void handleMessage(Message msg) {
   switch(msg.what){
    case MainActivity.REFRESH:
      mGameView.postInvalidate();        //刷新界面
                  break;
    case MainActivity.REGAIN:
      initGameView();
      break;
    case MainActivity.RETURN:
      initReturn();
      break;
    default: break;
   }
  }
 };
    
    public void initGameView(){
     mGameView = new GameView(this,this);
     setContentView(mGameView);
    }
    
    public void initReturn(){
     //结束程序
     System.exit(0);
    }
    
 class GameThread implements Runnable
 {
  public void run()
  {
   while (!Thread.currentThread().isInterrupted())
   {
    Message message = new Message();
    message.what = MainActivity.REFRESH;
    // 发送消息
    MainActivity.this.mHandler.sendMessage(message);
    try
    {
     Thread.sleep(100);
    }
    catch (InterruptedException e)
    {
     Thread.currentThread().interrupt();
    }
   }
  }
 }

}

二、GameView类的代码：

package com.cn.android;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.view.MotionEvent;
import android.view.View;

public class GameView extends View{
 
 private MainActivity activity;
 private Bitmap bggame_image;
 private Bitmap game_Spoint;
 private Bitmap game_Dpoint;
 
 private boolean showSpoint = false;
 private boolean showDpoint = false;
 private boolean showNose = false;
 private static int scount = 1;
 private static int dcount = 1;
 private static int ncount = 1;
 
 Paint paint;
 private String redText = "6";
 private static int rcount = 6;
 private String blueText = "1";
 private static int bcount = 1;
 
 public GameView(Context context,MainActivity activity) {
  super(context);
  this.activity = activity;
  InitBitmap();
 }
 


 @Override
 public void onDraw(Canvas canvas)
 {
  paint = new Paint();
  paint.setTextSize(35.0f);
  canvas.drawBitmap(bggame_image,0,0,null);
  if(showSpoint){
   canvas.drawBitmap(game_Spoint,32,124,null);   
  }
  if(showDpoint){
   canvas.drawBitmap(game_Dpoint,32,207,null);  
  }
  if(showNose){
   canvas.drawBitmap(game_Dpoint,88,329,null);
  }
  canvas.drawText(redText, 148, 152, paint);
  canvas.drawText(blueText, 148, 230, paint);
 }
 
 //加载图片
 private void InitBitmap()
 {
  bggame_image = BitmapFactory.decodeResource(this.getResources(), R.drawable.ernie);
  game_Spoint = BitmapFactory.decodeResource(this.getResources(), R.drawable.game_point);
  game_Dpoint = BitmapFactory.decodeResource(this.getResources(), R.drawable.game_point);
 }
 
 @Override
 public boolean onTouchEvent(MotionEvent event) 
 {
  int x=(int)event.getX();
  int y=(int)event.getY();
  
  if(event.getAction()!=MotionEvent.ACTION_DOWN)
   return super.onTouchEvent(event);
  
  //设置点击区域，可以用刷新界面来显示要加载的图片
  Rect rcSimpleChoice,rcDoulbeChoice,rcRegainGame,rcReturnSE,
  rcRedBig,rcRedSmall,rcBlueBig,rcBlueSmall,rcNose;
  
  rcSimpleChoice=new Rect(21,112,63,157);
  rcDoulbeChoice=new Rect(21,196,63,235);
  rcRegainGame=new Rect(148,424,189,445);
  rcReturnSE=new Rect(216,424,258,445);
  rcRedBig=new Rect(192,114,240,137);
  rcRedSmall=new Rect(189,142,236,168);
  rcBlueBig=new Rect(196,188,244,215);
  rcBlueSmall=new Rect(193,219,240,245);
  rcNose=new Rect(82,326,111,343);

  //点击男生的圆圈区域
  if(rcSimpleChoice.contains(x,y))
  {
   if(scount%2 == 1){
    showSpoint = true;      
   }
   else if(scount%2 == 0){
    showSpoint = false;   
   }
   scount ++; 
   //通过发送消息来刷新界面
            activity.mHandler.sendEmptyMessage(MainActivity.REFRESH);
   //invalidate();
  }
  
  //点击女生的圆圈区域
  if(rcDoulbeChoice.contains(x,y))
  {
   if(dcount%2 == 1){
    showDpoint = true;      
   }
   else if(dcount%2 == 0){
    showDpoint = false;   
   }
   dcount ++; 
//   activity.mHandler.sendEmptyMessage(MainActivity.REFRESH);
   //或者直接发送消息
   invalidate();
  }
  if(rcRegainGame.contains(x,y))
  {
   //点击返回键
   activity.mHandler.sendEmptyMessage(MainActivity.RETURN);
  }
  if(rcReturnSE.contains(x,y))
  {
   //点击重玩
   rcount = 6;
   bcount = 1;
   activity.mHandler.sendEmptyMessage(MainActivity.REGAIN);
  }
  //点击红球上箭头按钮
  if(rcRedBig.contains(x,y))
  {
   if(rcount<20){
    rcount ++ ;
    redText = String.valueOf(rcount);
    invalidate();   
   }
  }
  //点击红球下箭头按钮
  if(rcRedSmall.contains(x,y))
  {
   if(rcount>6){
    rcount -- ;
    redText = String.valueOf(rcount);
    invalidate();    
   }
  }
  //点击蓝球上箭头按钮
  if(rcBlueBig.contains(x,y))
  {
   if(bcount<16){
    bcount ++ ;
    blueText = String.valueOf(bcount);
    invalidate();   
   }
  }
  //点击蓝球下箭头按钮
  if(rcBlueSmall.contains(x,y))
  {
   if(bcount>1){
    bcount -- ;
    blueText = String.valueOf(bcount);
    invalidate();   
   }
  }
  //点击小人图片鼻子区域
  if(rcNose.contains(x,y))
  {
   if(ncount%2 == 1){
    showNose = true;      
   }
   else if(ncount%2 == 0){
    showNose = false;   
   }
   ncount ++; 
   //通过发送消息来刷新界面
            activity.mHandler.sendEmptyMessage(MainActivity.REFRESH);
   //invalidate();
  }
  
  return super.onTouchEvent(event);
 }
}

三、特别说明，有想要源码的可以留言，有问题的可以留言，有好的见解的也可以留言，互相讨论，共同进步；

转载请标明出处：http://blog.csdn.net/wdaming1986/article/details/6677729

谢谢