Android_(游戏)打飞机01：前言 传送门
Android_(游戏)打飞机02：游戏背景滚动 传送门
游戏背景滚动效果
package com.example.administrator.myapplication;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.WindowManager;
import java.util.ArrayList;
import java.util.List;
/**
* Created by Administrator on 2018/8/9.
*/
public class dafeijiGameView extends SurfaceView implements
SurfaceHolder.Callback,Runnable{
private Bitmap my;//自己
private Bitmap baozha;//爆炸
private Bitmap bg;//背景
private Bitmap diren;//敌人
private Bitmap zidan;//子弹
private Bitmap erjihuancun;//二级缓存
private WindowManager windowManager;//获得界面长宽高
private int display_w; //界面的宽
private int display_h; //界面的高
private List<GameImage> gameImage = new ArrayList();
public dafeijiGameView(Context context) {
super(context);
getHolder().addCallback(this);
}
private void init(){
//加载照片
my= BitmapFactory.decodeResource(getResources(),R.drawable.my);
baozha= BitmapFactory.decodeResource(getResources(),R.drawable.baozha);
bg= BitmapFactory.decodeResource(getResources(),R.drawable.bg);
diren= BitmapFactory.decodeResource(getResources(),R.drawable.diren);
zidan= BitmapFactory.decodeResource(getResources(),R.drawable.zidan);
erjihuancun=Bitmap.createBitmap(display_w,display_h, Bitmap.Config.ARGB_8888);
gameImage.add(new BeijingImage(bg)); //先加入背景照片
}
private interface GameImage{
public Bitmap getBitmap();
public int getX();
public int getY();
}
//负责背景照片的处理
private class BeijingImage implements GameImage{
private Bitmap bg;
private BeijingImage(Bitmap bg){
this.bg=bg;
newBitmap = Bitmap.createBitmap(display_w,display_h, Bitmap.Config.ARGB_8888);
}
private Bitmap newBitmap = null;
private int height = 0;
public Bitmap getBitmap(){
Paint p = new Paint();
Canvas canvas = new Canvas(newBitmap);
canvas.drawBitmap(bg,
new Rect(0,0,bg.getWidth(),bg.getHeight()),
new Rect(0,height,display_w,display_h+height),p);
canvas.drawBitmap(bg,
new Rect(0,0,bg.getWidth(),bg.getHeight()),
new Rect(0,-display_h+height,display_w,height),p);
height++;
if(height==display_h){
height=0;
}
return newBitmap;
}
public int getX(){
return 0;
}
public int getY(){
return 0;
}
}
private boolean state = false;
private SurfaceHolder holder;
//绘画中心
public void run() {
Paint p1 = new Paint();
try{
while(true){
Canvas newCanvas = new Canvas(erjihuancun);
for(GameImage image:gameImage){
newCanvas.drawBitmap(image.getBitmap(),image.getX(),image.getY(),p1);
}
Canvas canvas = holder.lockCanvas();
canvas.drawBitmap(erjihuancun,0,0,p1);
holder.unlockCanvasAndPost(canvas);
Thread.sleep(10);
}
}catch(Exception e){
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
state = false;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
//得到屏幕的宽和高
display_w=width;
display_h=height;
init();
this.holder=holder;
state = true;
new Thread(this).start();
}
}
dafeijiView.java
package com.example.administrator.myapplication;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//去掉标题
// requestWindowFeature(Window.FEATURE_NO_TITLE);
dafeijiGameView view = new dafeijiGameView(this);
setContentView(view);
}
}
MainActivity.java
实现过程
使用线程绘画游戏
public void run() {
Paint p1 = new Paint();
try{
while(true){
Canvas newCanvas = new Canvas(erjihuancun);
for(GameImage image:gameImage){
newCanvas.drawBitmap(image.getBitmap(),image.getX(),image.getY(),p1);
}
Canvas canvas = holder.lockCanvas();
canvas.drawBitmap(erjihuancun,0,0,p1);
holder.unlockCanvasAndPost(canvas);
Thread.sleep(10);
}
}catch(Exception e){
}
}
绘画移动的背景图片
public Bitmap getBitmap(){
Paint p = new Paint();
Canvas canvas = new Canvas(newBitmap);
canvas.drawBitmap(bg,
new Rect(0,0,bg.getWidth(),bg.getHeight()),
new Rect(0,height,display_w,display_h+height),p);
canvas.drawBitmap(bg,
new Rect(0,0,bg.getWidth(),bg.getHeight()),
new Rect(0,-display_h+height,display_w,height),p);
height++;
if(height==display_h){
height=0;
}
return newBitmap;
}
surfaceCreated：创建时初始化图片并开启线程绘画游戏
@Override
public void surfaceCreated(SurfaceHolder holder) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
state = false;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
//得到屏幕的宽和高
display_w=width;
display_h=height;
init();
this.holder=holder;
state = true;
new Thread(this).start();
}
初始化函数。加载图片
private void init(){
//加载照片
my= BitmapFactory.decodeResource(getResources(),R.drawable.my);
baozha= BitmapFactory.decodeResource(getResources(),R.drawable.baozha);
bg= BitmapFactory.decodeResource(getResources(),R.drawable.bg);
diren= BitmapFactory.decodeResource(getResources(),R.drawable.diren);
zidan= BitmapFactory.decodeResource(getResources(),R.drawable.zidan);
erjihuancun=Bitmap.createBitmap(display_w,display_h, Bitmap.Config.ARGB_8888);
gameImage.add(new BeijingImage(bg)); //先加入背景照片
}
线程中使用二级缓存绘画背景，每隔10ms绘画一次
Canvas canvas = holder.lockCanvas();
canvas.drawBitmap(erjihuancun,0,0,p1);
holder.unlockCanvasAndPost(canvas);
Thread.sleep(10);
图片坐标的移动
Paint p = new Paint();
Canvas canvas = new Canvas(newBitmap);
//第一张图片
canvas.drawBitmap(bg,
new Rect(0,0,bg.getWidth(),bg.getHeight()),
new Rect(0,height,display_w,display_h+height),p);
//第二张图片
canvas.drawBitmap(bg,
new Rect(0,0,bg.getWidth(),bg.getHeight()),
new Rect(0,-display_h+height,display_w,height),p);
height++;
宽度不发生改变，长度发生变化，两张图片的高不断升高(height++)
canvas.drawBitmap(bitmap, srcRect, dstRect, paint) ：在图片上绘制图片 传送门
1参：要绘制的图片
2参： 是对图片进行裁截，可以传null，传null则表示显示整个图片
3参：目标区域，即把原区域改变参数，得到自己想要的图片及位置，是图片在Canvas画布中显示的区域
4参：paint画笔，可以为null
Rect(left,top,right,bottom) ：用于表示坐标系中的一块矩形区域
left:左
top:上
right:右
bottom:下
if(height==display_h){
height=0;
}
其实只是两张照片拼接而成，两张图片不断的向上移动。开始时，第一张在手机屏幕中间，第二张在手机屏幕下方，第一张图片超出手机最上方的范围时候拼接到第一张图片下面，下一张图片不断往上运动形成新的第一张图片在手机屏幕中间，两张背景图片就这样不断的进行循环
在MainActivity.java中添加这一句可以去掉标题
requestWindowFeature(Window.FEATURE_NO_TITLE);
原文地址：https://www.cnblogs.com/1138720556Gary/p/9452487.html
时间： 2024-08-03 23:19:28