请教：Matrix 的缩放（Bitmap）

[男主角]

package com.Feier.android.Matrix;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.view.KeyEvent;
import android.view.View;

public class GameView extends View implements Runnable{
	
	private Bitmap mBitmapQQ=null;
	int mBitmapQQ_Width=0;
	int mBitmapQQ_Height=0;
	float Angle=0.0f;
	Matrix mMatrix=new Matrix();
	
	public GameView(Context context){
		super(context);
		//装载资源
		mBitmapQQ=((BitmapDrawable)getResources().getDrawable(R.drawable.button1)).getBitmap();
		mBitmapQQ_Width=mBitmapQQ.getWidth();
		mBitmapQQ_Height=mBitmapQQ.getHeight();
		
		new Thread(this).start();
	}
	
	public void onDraw(Canvas canvas){
		super.onDraw(canvas);
		
		//重置mMatrix
		mMatrix.reset();
		//设置旋转
		mMatrix.setRotate(Angle);
		//按mMatrix的旋转构建新的Bitmap
		Bitmap mBitmapQQ2=Bitmap.createBitmap(mBitmapQQ,0,0,mBitmapQQ_Width,mBitmapQQ_Height,mMatrix,true);
		//绘制旋转之后的图像
		GameView.drawImage(canvas,mBitmapQQ2,(320-mBitmapQQ_Width)/2,10);
		
		mBitmapQQ2=null;
	}
	
	public boolean onKeyDown(int keyCode,KeyEvent event){
		if (keyCode==KeyEvent.KEYCODE_DPAD_LEFT){
			Angle--;
		}
		else if(keyCode==KeyEvent.KEYCODE_DPAD_RIGHT){
			Angle++;
		}
		return true;
	}
	
	public void run(){
		while(!Thread.currentThread().isInterrupted()){
			try{
				Thread.sleep(100);
			}
			catch(Exception e){
				Thread.currentThread().interrupt();
			}
			postInvalidate();
		}
	}
	
	/**
	 * 绘制一个Bitmap
	 * @param canvas画布
	 * @param btimap画布
	 * @param x 屏幕上的x坐标
	 * @param y 屏幕上的y坐标
	 */
	public static void drawImage(Canvas canvas, Bitmap bitmap,int x,int y){
		canvas.drawBitmap(bitmap, x,y,null);
	}
}

package com.Feier.android.Matrix;

import android.app.Activity;
import android.os.Bundle;

public class Activity01 extends Activity {
	
	private GameView mGameView;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        mGameView=new GameView(this);
        setContentView(mGameView);
        //setContentView(R.layout.main);
    }
}

请问，代码附上，麻烦大虾看下。
显示是肯定不会出问题。但是，在GameView中设置好的界面，按键按下事件，在主活动中，没有显示。求解。

[yuanzi]

在按键处理中调用刷新试试 postInvalidate

[lly598985]

在activity中添加：
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ( mGameView== null )
{
return false;
}
return mGameView.onKeyDown(keyCode,event);
}
试试看