Question

我正在尝试在android中创建一个基本的棒球游戏。背景图像被设置为xml文件，并且我想在本垒板上设置基本球图像以在触摸屏幕时移动。问题是我无法显示棒球图像。该应用程序本身有5个活动，游戏是应用程序内的一个活动。我是Android的新手并开发了一款基本游戏。任何帮助，将不胜感激。提前致谢。 ` 要开始这是我的清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.myapp.ron.drinkingbaseball"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.myapp.ron.drinkingbaseball.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
         <activity
            android:name="com.myapp.ron.drinkingbaseball.Stats"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.myapp.ron.drinkingbaseball.STATS" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
          <activity
            android:name="com.myapp.ron.drinkingbaseball.DrinkingBaseballGame"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.myapp.ron.drinkingbaseball.DRINKINGBASEBALLGAME" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
         <activity
            android:name="com.myapp.ron.drinkingbaseball.MyGameSurface"
            android:label="@string/app_name" >
        </activity>
          <activity
            android:name="com.myapp.ron.drinkingbaseball.ShowStatistics"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.myapp.ron.drinkingbaseball.SHOWSTATISTICS" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
    </application>
</manifest>

这是我的主要游戏java代码

public class DrinkingBaseballGame extends Activity implements OnTouchListener{

    MyGameSurface mySurface;
    float x, y, sx, sy, fx, fy, dx, dy, anix, aniy, scaledX, scaledY;
    Bitmap ball, background;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        mySurface = new MyGameSurface(this);
        x = 0;
        y = 0;
        sx = 0;
        sy = 0;
        fx = 0;
        fy = 0;
        dx = 0;
        dy = 0;
        anix = 0;
        aniy = 0;
        scaledX = 0;
        scaledY = 0;
        ball = BitmapFactory.decodeResource(getResources(), R.drawable.baseball);
        background = BitmapFactory.decodeResource(getResources(), R.drawable.baseball_field_background);
        setContentView(R.layout.drinkingbaseball);

    }

    @Override
    protected void onPause() {
        // TODO Auto-generated method stub
        super.onPause();
        mySurface.pause();
    }

    @Override`enter code here`
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        mySurface.resume();
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        // TODO Auto-generated method stub

        try {
            Thread.sleep(50);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        x = event.getX();
        y = event.getY();

        switch(event.getAction()){
        case MotionEvent.ACTION_DOWN:
            sx = event.getX();
            sy = event.getY();
            dx = dy = anix = aniy = scaledX = scaledY = fx = fy = 0;    
            break;

        case MotionEvent.ACTION_UP:
            fx = event.getX();
            fy = event.getY();
            dx = fx - sx;
            dy = fy - sy;
            scaledX = dx/30;
            scaledY = dy/30;
            x = y = 0;
            break;
        }

        return true;
    }   

    public class MyGameSurface extends SurfaceView implements Runnable{

        SurfaceHolder myHolder;
        Thread myThread = null;
        boolean isRunning = false;

        public MyGameSurface(Context context) {
            super(context);
            myHolder = getHolder();
        }

        public void pause(){
            isRunning = false;
            while(true){
                try{
                    myThread.join();
                }catch(InterruptedException e){
                    e.printStackTrace();
                }
                break;
            }
            myThread = null;
        }

        public void resume(){
            isRunning = true;
            myThread = new Thread(this);
            myThread.start();
        }

        @Override
        public void run() {
            // TODO Auto-generated method stub
            while(isRunning){
                if(!myHolder.getSurface().isValid())
                continue;

                Canvas canvas = myHolder.lockCanvas();
                canvas.drawBitmap(ball, canvas.getWidth()/2, canvas.getHeight()/4, null);

                myHolder.unlockCanvasAndPost(canvas);
            }
        }

    }
}

这是我的表面代码

public class MyGameSurface extends View{

    Bitmap background, ball;
    float changingY;

    public MyGameSurface(Context context) {
        // TODO Auto-generated constructor stub
        super(context);
        ball = BitmapFactory.decodeResource(getResources(), R.drawable.baseball);
        changingY = 0;
        background = BitmapFactory.decodeResource(getResources(), R.drawable.baseball_field_background);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        // TODO Auto-generated method stub
        super.onDraw(canvas);       
        canvas.drawBitmap(ball, canvas.getWidth()/4, changingY, null);
        if(changingY < canvas.getHeight()){
            changingY += 10;
        }else{
            changingY = 0;
        }
        invalidate();   
    }

}
`

Answer 1

如果您希望此代码可以使用

替换此行

setContentView(R.layout.drinkingbaseball);

这一个

setContentView(mySurface);

但我仍然坚持认为你的观念并不好。

希望这有助于并享受您的工作。

使用表面视图创建一个基本的棒球比赛我试图让我的棒球图像显示

1 个答案: