飞机大战项目（1）主菜单

首先正式在制作飞机打战之前我们先把所需的图片导入Android Studio中放在app/main/res/dawable/，目录下；（导入的方法直接复制图片，之后选中dawable文件夹粘贴即可）

主界面总体包括：

一.GameSurface类

内有包括：

1.画图所需的属性

//画图

private SurfaceHolder surfaceHolder;//包装类

private Canvas canvas; //画布

private Paint paint; //画笔

//与屏幕坐标

public static int screenWidht; //屏幕宽度

public static int screenHight; //屏幕高度

//Menu相关的 图片元素

private GameMenu gameMenu;

private Bitmap bmpMenuBG; //背景图片

private Bitmap bmpMenuLogo; //菜单页面Logo

private Bitmap bmpMenuButton;//菜单页面按钮

private Bitmap bmpMenuTxt;

2.继承extends SurfaceView类时需要重写的GameSurface(Context context)类

public GameSurface(Context context) {

super(context);

surfaceHolder = this.getHolder();//初始化holder(类似于工具）

surfaceHolder.addCallback(this);//回调函数

paint = new Paint(); //初始化画笔

paint.setAntiAlias(true); //抗锯齿

}

3.实现surfaceCreated.Callback接口时会产生（三个方法），将(SurfaceHolder holder)类进行重写了 ， 添加一个主线程（new Thread）。

@Override

public void surfaceCreated(SurfaceHolder holder) {

screenWidht = this.getWidth();

screenHight = this.getHeight();

initBitmap();

new Thread(new Runnable() {

@Override

public void run() {

MyDraw();

}

}).start();

}

4，初始化画图工具方法MyDraw（），

/**

* 绘图方法

*/

private void MyDraw() {

//画布锁定初始化

canvas = surfaceHolder.lockCanvas();

gameMenu.drow(canvas, paint);//实例化的gameMenu调用drow方法画出图片

if (canvas != null) {

surfaceHolder.unlockCanvasAndPost(canvas);

}

}

5.initBitmap（），初始化图片元素的方法把图片转化成BitmapFactory类型的图片

private void initBitmap() {

//把图片转化成BitmapFactory

bmpMenuBG = BitmapFactory.decodeResource(

this.getResources(), R.drawable.mainmenu);

bmpMenuButton = BitmapFactory.decodeResource(

this.getResources(), R.drawable.menustart);

bmpMenuTxt = BitmapFactory.decodeResource(

this.getResources(), R.drawable.starttext);

bmpMenuLogo = BitmapFactory.decodeResource(

this.getResources(), R.drawable.logo);

//初始化

gameMenu = new GameMenu(bmpMenuBG, bmpMenuLogo, bmpMenuButton, bmpMenuTxt);

}

完成后：

package com.example.gamemean;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.icu.util.Calendar;

import android.os.Build;

import android.support.annotation.RequiresApi;

import android.view.Menu;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

/**

* Created by 小泽 on 2017/5/24.

*/

@RequiresApi(api = Build.VERSION_CODES.N)

public class GameSurface extends SurfaceView implements SurfaceHolder.Callback {

private SurfaceHolder surfaceHolder;//包装类

private Canvas canvas; //画布

private Paint paint; //画笔

public static int screenWidht; //屏幕宽度

public static int screenHight; //屏幕高度

//Menu相关的

private GameMenu gameMenu;

private Bitmap bmpMenuBG; //背景图片

private Bitmap bmpMenuLogo; //菜单页面Logo

private Bitmap bmpMenuButton;//菜单页面按钮

private Bitmap bmpMenuTxt;

public GameSurface(Context context) {

super(context);

surfaceHolder = this.getHolder();//初始化holder(类似于工具）

surfaceHolder.addCallback(this);//回调函数

paint = new Paint(); //初始化画笔

paint.setAntiAlias(true); //抗锯齿

}

@Override

public void surfaceCreated(SurfaceHolder holder) {

screenWidht = this.getWidth();

screenHight = this.getHeight();

initBitmap();

new Thread(new Runnable() {

@Override

public void run() {

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() {

//画布锁定初始化

canvas = surfaceHolder.lockCanvas();

gameMenu.drow(canvas, paint);//实例化的gameMenu调用drow方法画出图片

if (canvas != null) {

surfaceHolder.unlockCanvasAndPost(canvas);

}

}

private void initBitmap() {

//把图片转化成BitmapFactory

bmpMenuBG = BitmapFactory.decodeResource(

this.getResources(), R.drawable.mainmenu);

bmpMenuButton = BitmapFactory.decodeResource(

this.getResources(), R.drawable.menustart);

bmpMenuTxt = BitmapFactory.decodeResource(

this.getResources(), R.drawable.starttext);

bmpMenuLogo = BitmapFactory.decodeResource(

this.getResources(), R.drawable.logo);

//初始化

gameMenu = new GameMenu(bmpMenuBG, bmpMenuLogo, bmpMenuButton, bmpMenuTxt);

}

}

二.GameMenu类

package com.example.gamemean;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.Rect;

/**

* Created by 小泽 on 2017/5/24.

*/

public class GameMenu {

private Bitmap bmpMenuBG; //背景图片

private Bitmap bmpMenuLogo; //菜单页面Logo

private Bitmap bmpMenuButton;//菜单页面按钮

private Bitmap bmpMenuTxt;//菜单页面文本

private Rect rect; //创建一个长方形，放置飞机大战LOGO,因为logo图片过大，所以先填充一个长方体

//构造函数初始化

public GameMenu(Bitmap bmpMenuBG, Bitmap bmpMenuLogo, Bitmap bmpMenuButton, Bitmap bmpMenuTxt) {

this.bmpMenuBG = bmpMenuBG;

this.bmpMenuButton = bmpMenuButton;

this.bmpMenuLogo = bmpMenuLogo;

this.bmpMenuTxt = bmpMenuTxt;

rect = new Rect(0, GameSurface.screenHight / 3, GameSurface.screenWidht,

GameSurface.screenHight / 3 + GameSurface.screenHight / 5);

//此处三个参数

}

/**

* 画图

*

* @param canvas

* @param paint

*/

public void drow(Canvas canvas, Paint paint) {

//菜单背景

canvas.drawBitmap(bmpMenuBG, 0, 0, paint);

//画飞机大战logo，放入长方形中

canvas.drawBitmap(bmpMenuLogo, null, rect, paint);

//画按钮

int x = GameSurface.screenHight / 3 * 2;

int y = GameSurface.screenWidht / 2 - bmpMenuButton.getWidth() / 2;

canvas.drawBitmap(bmpMenuButton, y, x, paint);

//画文本

int m = y + bmpMenuButton.getWidth() / 6;

int n = x + bmpMenuButton.getHeight() / 6;

canvas.drawBitmap(bmpMenuTxt, m, n, paint);

//

}

}

注意：个元素坐标需要进行调试

三.MainActivity类

package com.example.gamemean;

import android.os.Build;

import android.support.annotation.RequiresApi;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

@RequiresApi(api = Build.VERSION_CODES.N)

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(new GameSurface(this));

}

}