MySurfaceView

package com.example.shinelon.mysurfaceview;

import android.content.Context;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import
 
 android.view.SurfaceView;

import java.util.Vector;

public class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback, Runnable {
    private SurfaceHolder surfaceHolder;
    private Canvas canvas;
    public static int height;
    public static int width;
    private boolean inDrawing = true
 
;
    private BlackGround blackGround;
    private Myplane myplane;
    private Bossplane bossplane;
    private Vector<Bullet> bulletVector = new Vector<>();

    private int count;


    public MySurfaceView(Context context) {
        super(context);
        init();
    }

    private void
 
 init() {
        surfaceHolder = getHolder();
        surfaceHolder.addCallback(this);//添加回調事件
        setFocusable(true);//設定可聚焦
        setKeepScreenOn(true);//保持螢幕常亮
        setFocusableInTouchMode(true);//設定觸控模式
    }


    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        height = getHeight();
        width = getWidth();
        new Thread(this).start();//啟動子執行緒
    }


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

    }


    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {

    }


    @Override
    public void run() {
        Paint paint = new Paint();
        blackGround = new BlackGround(BitmapFactory.decodeResource(getResources(), R.mipmap.bk));
        myplane = new Myplane((BitmapFactory.decodeResource(getResources(), R.mipmap.myplane)));
        bossplane = new Bossplane(BitmapFactory.decodeResource(getResources(),R.mipmap.bossplane));
        while (inDrawing) {
            count++;
            try {
                canvas = surfaceHolder.lockCanvas();
                canvas.drawColor(Color.WHITE);
                blackGround.draw(canvas, paint);
                myplane.draw(canvas, paint);
                bossplane.draw(canvas,paint);

                if(count % 50 ==0){
                    Bullet bullet = new Bullet(BitmapFactory.decodeResource(getResources(),R.mipmap.mybullet),myplane.getX()+100,myplane.getY(),0);
                    bulletVector.add(bullet);//將子彈新增到bulletVector陣列中
                }

                for(int i=0;i<bulletVector.size();i++){
                    bulletVector.elementAt(i).draw(canvas,paint);//將子彈打印出來
                }

                for(int i =0;i<bulletVector.size();i++){
                    if(bulletVector.elementAt(i).isDead()){
                        bulletVector.remove(i);//移除無效子彈
                    }
                }
                //測試，有效子彈的數量
                //Log.e("MySurfaceView",".................."+bulletVector.size());

                if(count % 20 ==0){
                    Bullet bullet = new Bullet(BitmapFactory.decodeResource(getResources(),R.mipmap.bossbullet),bossplane.getX(),bossplane.getY(),1);
                    bulletVector.add(bullet);//將子彈新增到bulletVector陣列中
                }

                for(int i=0;i<bulletVector.size();i++){
                    bulletVector.elementAt(i).draw(canvas,paint);//將子彈打印出來
                }

                for(int i =0;i<bulletVector.size();i++){
                    if(bulletVector.elementAt(i).isDead()){
                        bulletVector.remove(i);//移除無效子彈
                    }
                }

            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (canvas != null) {
                    surfaceHolder.unlockCanvasAndPost(canvas);
                }
            }
        }


    }
}

Bossplane敵機

package com.example.shinelon.mysurfaceview;

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

public class Bossplane {
    private Bitmap bitmap;
    private int x,y;
    private int frameW,frameH;
    private int speed = 4;
    private int crazySpeed =50;
    private int count;//計數器
    private int time = 50;//瘋狂時間間隔
    private boolean isCrazy;


    public Bossplane(Bitmap bitmap) {
        this.bitmap = bitmap;
        this.frameW = bitmap.getWidth()/10;
        this.frameH = bitmap.getHeight();
    }

    public void draw(Canvas canvas, Paint paint){
        canvas.save();//先儲存
        canvas.clipRect(x,y,x+frameW,y+frameH);//對Boss飛機進行裁剪
        canvas.drawBitmap(bitmap,x,y,paint);
        canvas.restore();//後釋放
        logic();
    }

    public void logic() {
        count++;
        if (isCrazy) {
            //瘋狂模式
            y = y + crazySpeed;
            crazySpeed--;
            if (y == 0) {
                isCrazy = false;
                crazySpeed = 50;
            }

        } else {
            if (y > MySurfaceView.height - frameH) {
                crazySpeed = -crazySpeed;
            }

            if (count % time == 0) {
                isCrazy = true;
            }
            x = x + speed;
            if (x > MySurfaceView.width - frameW) {
                speed = -speed;
            }
            if (x < 0) {
                speed = -speed;
            }
        }
    }



    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public Bitmap getBitmap() {
        return bitmap;
    }

    public int getFrameW() {
        return frameW;
    }

    public int getFrameH() {
        return frameH;
    }
}

Bullet子彈

package com.example.shinelon.mysurfaceview;

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

public class Bullet {
    private Bitmap bitmap;
    private int x,y;
    private boolean isDead;
    private int speed = 20;
    private int type;

    public Bullet(Bitmap bitmap, int x, int y,int type) {
        this.bitmap = bitmap;
        this.x = x;
        this.y = y;
        this.type= type;
    }

    public void draw(Canvas canvas, Paint paint){
        canvas.drawBitmap(bitmap,x,y,paint);
        logic();
    }

    public  void logic(){
        switch (type){
            //玩家子彈
            case 0:
                y-=speed;
                if(y<0){
                    isDead = true;
                }
            break;
            //boss子彈
            case 1:
                y +=speed;
                if (y<0){
                    isDead = true;
                }
                break;
        }

    }

    public boolean isDead() {
        return isDead;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public Bitmap getBitmap() {
        return bitmap;
    }

Myplane玩家飛機

package com.example.shinelon.mysurfaceview;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.MotionEvent;

public class Myplane {
    private Bitmap bitmap;
    private int x, y;
    private int height, width;//
    private boolean noCollision;
    private int noCollisionCount;

    public Myplane(Bitmap bitmap) {
        this.bitmap = bitmap;
        x = MySurfaceView.width / 2 - bitmap.getWidth() / 2;
        y = MySurfaceView.height - bitmap.getHeight();
        width = bitmap.getWidth();//
        height = bitmap.getHeight();//
    }

    public void draw(Canvas canvas, Paint paint) {
        canvas.drawBitmap(bitmap, x, y, paint);
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public int getHeight() {
        return height;
    }

    public int getWidth() {
        return width;
    }
}