飞机大战的第一个页面

GameSurface类

package com.example.asus.myapplication;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

/**
* Created by asus on 2017/5/24.
*/

public class GameSurface extends SurfaceView implements SurfaceHolder.Callback {

private Canvas canvas;
private Paint paint;
private SurfaceHolder surfaceHolder;

public static int screenWidth;
public static int screenHeight;

//menu相关的东西
private  GameMenu gameMenu;
private Bitmap bmpMenuBG;  //菜单页面背景图片
private Bitmap bmpLogo;    //菜单页面logo
private Bitmap bmpButton;   //菜单页面button
private Bitmap bmpText;    //菜单页面文本

public GameSurface(Context context) {
super(context);
surfaceHolder=this.getHolder();  //初始化holder
surfaceHolder.addCallback(this);
paint=new Paint();
paint.setAntiAlias(true);

}

@Override
public void surfaceCreated(SurfaceHolder holder) {

screenWidth=this.getWidth();
screenHeight=this.getHeight();

initBitmap();

new Thread(new Runnable() {
@Override
public void run() {
while (true) {
myDraw();
}
}
}).start();

}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {

}

/**
* 绘图方法
*/
private void myDraw() {
canvas = surfaceHolder.lockCanvas();

//调用GameSurface对象画游戏菜单页面
gameMenu.draw(canvas, paint);

if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);     //解锁画布
}
}
/**
* 初始化图片方法
*/
private void initBitmap(){
//把图片转换成bitmap格式
bmpMenuBG= BitmapFactory.decodeResource(this.getResources(),R.drawable.mainmenu);
bmpLogo= BitmapFactory.decodeResource(this.getResources(),R.drawable.logo);
bmpButton= BitmapFactory.decodeResource(this.getResources(),R.drawable.menustart);
bmpText= BitmapFactory.decodeResource(this.getResources(),R.drawable.starttext);

//初始化对象
gameMenu = new GameMenu(bmpMenuBG,bmpLogo,bmpButton,bmpText);

}
}

GameMenu类

package com.example.asus.myapplication;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;

/**
* Created by asus on 2017/5/24.
*/

public class GameMenu {
private Bitmap bmpMenuBG;  //菜单页面背景图片
private Bitmap bmpLogo;    //菜单页面logo
private Bitmap bmpButton;   //菜单页面button
private Bitmap bmpText;    //菜单页面文本
private Rect rect;    //矩形

public GameMenu(Bitmap bmpMenuBG,Bitmap bmpLogo,Bitmap bmpButton,Bitmap bmpText){
this.bmpMenuBG=bmpMenuBG;
this.bmpLogo=bmpLogo;
this.bmpButton=bmpButton;
this.bmpText=bmpText;

rect=new Rect(0,GameSurface.screenHeight/3,GameSurface.screenWidth,GameSurface.screenHeight/3+GameSurface.screenHeight/5);

}
/**
* 画菜单页面
*/
public void draw(Canvas canvas, Paint paint){
//画背景图

canvas.drawBitmap(bmpMenuBG,0,0,paint);
canvas.drawBitmap(bmpLogo,null,rect,paint);

int x=GameSurface.screenWidth/2-bmpButton.getWidth()/2;
int y=GameSurface.screenHeight/3*2;

canvas.drawBitmap(bmpButton,x,y,paint);
canvas.drawBitmap(bmpText,x+bmpButton.getWidth()/6,y+bmpButton.getHeight()/6,paint);

}
}