导入android content context象棋答案helpview java.pdf

packagecom.realaction.chessapp;

importandroid.content.Context;

importandroid.graphics.Bitmap;

importandroid.graphics.BitmapFactory;

importandroid.graphics.Canvas;

importandroid.graphics.Paint;

importandroid.view.MotionEvent;

importandroid.view.SurfaceHolder;

importandroid.view.SurfaceView;

/**

*

*

*

*/

publicclassHelpViewextendsSurfaceViewimplementsSurfaceHolder.Callback{

MainActivityactivity;//Activity

privateTutorialThreadthread;//

Bitmapback;//

BitmaphelpBackground;//

publicHelpView(Contextcontext,MainActivityactivity){//

super(context);

this.activity=activity;//õactivity

getHolder().addCallback(this);

this.thread=newTutorialThread(getHolder(),this);//

initBitmap();//

}

publicvoidinitBitmap(){//õ

back=BitmapFactory.decodeResource(getResources(),R.drawable.back);//

helpBackground=BitmapFactory.decodeResource(getResources(),

R.drawable.helpbackground);//

}

publicvoidonDraw(Canvascanvas){//д

canvas.drawBitmap(helpBackground,0,90,neint());//

canvas.drawBitmap(back,200,370,neint());//

}

publicvoidsurfaceChanged(SurfaceHolderholder,intformat,intwidth,

intheight){

}

publicvoidsurfaceCreated(SurfaceHolderholder){//

this.thread.setFlag(true);//λ

this.thread.start();//

}

publicvoidsurfaceDestroyed(SurfaceHolderholder){//

booleanretry=true;//λ

thread.setFlag(false);//λ

while(retry){

try{

thread.join();//

retry=false;//

}catch(InterruptedExceptione){

}//

}

}

publicbooleanonTouchEvent(MotionEventevent){//

if(event.getAction()MotionEvent.ACTION_DOWN){

if(event.getX()200event.getX()200+back.getWidth()