这是游戏的主界面的编写部分 首先,由于是游戏,所以必须提到一个组件SurfaceView。在这里我们自定义一个GameView继承自SurfaceView
注意:因为SurfaceView虽然继承自View,但并没重写onDraw(),所以子类可以重写onDraw()但并不能自动调用。
要想在SurfaceView中画出bitmap等,必须用如下格式
private void draw() {
Canvas canvas = surfaceHolder.lockCanvas();
if (canvas == null)
return;
//draw something
surfaceHolder.unlockCanvasAndPost(canvas);
}
然后开启一个线程,每隔一定时间调用这个draw函数、
GameView在创建的时候做如下这些事: 1.初始化一些参数,比如屏幕宽高,bitmap的生成 2.获得SurfaceHolder这个接口。在surfaceCreated中生成一个Thread来不断地调用draw函数,同时初始化玩家机型。另外设置接口。这个需要MainActivity来管理。因为MainActivity要重写返回键的功能来通知Thread是否要运行
接下来是draw函数的实现
private void draw() {
Canvas canvas = surfaceHolder.lockCanvas();
if (canvas == null)
return;
drawBackground(canvas);
drawPlane(canvas);
drawEnemy(canvas);
drawBullet(canvas);
judgeHit();
surfaceHolder.unlockCanvasAndPost(canvas);
}
每个函数的实现在源码里面都有,注释也很详细,这里就不贴出来了。
最后设置监听器,用来通知MainActivity是否播放音乐
GameView.java伪代码:(源代码在代码包里面)
public class GameView extends SurfaceView {
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 0x001:
draw();
break;
}
}
};
private Context context;
public GameView(final Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
//初始化一些参数,比如屏幕宽高,bitmap的生成
/**
* 通过SurfaceHolder接口访问这个surface,getHolder()方法可以得到这个接口
*/
surfaceHolder = getHolder();
surfaceHolder.addCallback(new Callback() {
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
flag = false;
}
@Override
public void surfaceCreated(SurfaceHolder arg0) {
flag = true;
// flag用来控制thread的运行
//这个需要MainActivity来管理。因为MainActivity要重写返回键的功能
//来通知Thread是否要运行
((MainActivity) context).setOnListener(new FinishListener() {
@Override
public void onFinish() {
flag = false;
}
@Override
public void onReStart() {
flag = true;
}
});
//生成一个Thread来不断地调用draw函数
new Thread(new Runnable() {
@Override
public void run() {
while (true) {
if (flag) {
// 移动背景
backY -= 5;
if (backY <= 0) {
backY = background.getHeight() / 2;
}
try {
Thread.sleep(50);// //////////////////
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.sendEmptyMessage(0x001);
}
}
}
}).start();
// 初始化玩家机型SharedPreferences
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2,
int arg3) {
}
});
}
private void draw() {
Canvas canvas = surfaceHolder.lockCanvas();
if (canvas == null)
return;
drawBackground(canvas);
drawPlane(canvas);
drawEnemy(canvas);
drawBullet(canvas);
judgeHit();
surfaceHolder.unlockCanvasAndPost(canvas);
}
private int lastX, lastY;
/**
* 用来设置playerPlane的位置 (non-Javadoc)
*
* @see android.view.View#onTouchEvent(android.view.MotionEvent)
*/
@Override
public boolean onTouchEvent(MotionEvent event) {
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
lastX = (int) event.getX();
lastY = (int) event.getY();
break;
case MotionEvent.ACTION_MOVE:
//....
break;
case MotionEvent.ACTION_UP:
break;
}
return true;
}
// 以下是监听MainActivity的监听器,用来通知MainActivity是否播放音乐
public interface BombListener {
public void PlayBomb();
public void stopBgMusic();
}
private BombListener listener;
public void setListener(BombListener listener) {
this.listener = listener;
}
}
接下来是MainActivity 过程: 1.判断游戏音乐的开启和关闭 2.监听器来通知播放音乐,由GameView传过来 3.重写返回键功能。判断是继续游戏还是结束 伪代码:
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 全屏
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
//判断游戏音乐是否关闭
generateOption();
//监听器来通知播放音乐,由GameView传过来
gameView = (GameView) findViewById(R.id.gameView1);
gameView.setListener(new BombListener() {
@Override
public void PlayBomb() {
if (soundPool != null) {
soundPool.play(soundIDbombAFD, 1, 1, 0, 0, 1);
}
}
@Override
public void stopBgMusic() {
if (mediaPlayer != null) {
mediaPlayer.stop();
}
}
});
}
/**
* 判断游戏音乐是否关闭
*/
private void generateOption() {
//MediaPlayer加载gamebg.mp3,soundpool加载bomb.WAV
}
//生命周期处理函数
/**
* 重写返回键功能 (non-Javadoc)
*
* @see android.app.Activity#onBackPressed()
*/
@Override
public void onBackPressed() {
finishListener.onFinish();
if (mediaPlayer != null) {
if (mediaPlayer.isPlaying())
mediaPlayer.pause();
isPause = true;
}
new AlertDialog.Builder(MainActivity.this)
.setTitle("选择:")
.setPositiveButton("中途结束游戏",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
dialog.dismiss();
setResult(Activity.RESULT_OK, new Intent(
MainActivity.this, Login.class));
finish();
}
})
.setNegativeButton("继续", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finishListener.onReStart();
if (mediaPlayer != null) {
if (isPause) {
mediaPlayer.start();
isPause = false;
}
}
}
}).show();
}
// 以下是监听GameView的监听器
public interface FinishListener {
public void onFinish();
public void onReStart();
}
private FinishListener finishListener;
public void setOnListener(FinishListener finishListener2) {
this.finishListener = finishListener2;
}
}
这个软件该展示的也都展示了。接下来就是代码链接: http://download.csdn.net/detail/lxj1137800599/9519094