Android：用動畫旋轉兩個物體（圓圈）onTouch

Question

基本上只需繪製兩個圓圈（一個紅色，一個藍色），並使它們與旋轉動畫一起旋轉。已經嘗試了幾天，但沒有取得任何成功。

也試圖將動畫方法移到GameView類中，但它在那裏也不起作用。

目前它只是onTouch崩潰。 這裏是到目前爲止我的代碼：

GameScreen

public class GameScreen extends Activity { 

    private GameView myGameView; 
    private DrawThread drawThread ; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_game_screen); 

     myGameView = (GameView) (findViewById(R.id.gameView1)); 

     myGameView.setZOrderOnTop(true); 
     myGameView.getHolder().setFormat(PixelFormat.TRANSLUCENT); 
    } 


    public boolean onTouchEvent(MotionEvent e) { 
     int eventaction = e.getAction(); 
     switch (eventaction) { 
      case MotionEvent.ACTION_DOWN: 
       System.out.println("Clicked"); 
       myGameView.rotate(myGameView); 
       myGameView.invalidate(); 
       break; 

     } 
     return true; 
    } 
} 

GameView

public class GameView extends SurfaceView implements 
     SurfaceHolder.Callback { 


    private BleenCatcher blueCatcher; 
    private BleenCatcher redCatcher; 
    private DrawThread drawThread; 
    private int colorBlue = -16776961; 
    private int colorRed = -65536; 



    public GameView(Context context) { 
     super(context); 
     initialize(); 
    } 

    public GameView(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     initialize(); 
    } 

    public GameView(Context context, AttributeSet attrs, int defStyle) { 
     super(context, attrs, defStyle); 
     initialize(); 
    } 

    private void initialize() { 
     getHolder().addCallback(this); 
     drawThread = new DrawThread(getHolder(), this); 
     setFocusable(true); 
    } 

    public void surfaceCreated(SurfaceHolder holder) { 
     blueCatcher = new BleenCatcher(540, 850, colorBlue); 
     redCatcher = new BleenCatcher(540, 950, colorRed); 
     drawThread.setRunning(true); 
     drawThread.start(); 
    } 

    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int 
     arg3) { 
     // TODO Auto-generated method stub 
    } 

    public void surfaceDestroyed(SurfaceHolder arg0) { 
     boolean retry = true; 
     drawThread.setRunning(false); 
     while (retry) { 
      try { 
       drawThread.join(); 
       retry = false; 
      } catch (InterruptedException e) { } 
     } 
    } 

    public void onDraw(Canvas canvas) { 

     redCatcher.onDraw(canvas); 
     blueCatcher.onDraw(canvas); 
    } 

    public void rotate(GameView game){ 
     redCatcher.changePosition(game); 
     blueCatcher.changePosition(game); 

    } 

} 

BleenCatcher

public class BleenCatcher { 

    int x, y, rad = 50; 
    private Animation anima; 
    private boolean rotate = false; 
    private GameView myGameView; 
    BleenPaint catcherPaint; 


    public BleenCatcher(int x, int y, int color) { 
     this.x = x; 
     this.y = y; 
     catcherPaint = new BleenPaint(1, Paint.Cap.SQUARE, Paint.Style.FILL, 
      color); 
    } 


    public void onDraw(Canvas canvas) { 
     if(rotate){ 
      canvas.drawCircle(x, y, rad, catcherPaint); 
      createAnimation(canvas); 
      rotate = false; 
     }else{ 
      canvas.drawCircle(x, y, rad, catcherPaint); 
     } 
    } 


    public void changePosition(GameView game){ 
     rotate = true; 
     myGameView = game; 
    } 


    protected void createAnimation(Canvas canvas) { 
     anima = new RotateAnimation(0, 180, 540 , 850); 
     anima.setRepeatMode(Animation.RESTART); 
     anima.setRepeatCount(Animation.INFINITE); 
     anima.setDuration(1000L); 
     myGameView.startAnimation(anima); 
    } 
} 

DrawThread

public class DrawThread extends Thread { 
    private SurfaceHolder surfaceHolder; 
    private GameView surfaceView; 
    private boolean run = false; 

    public DrawThread(SurfaceHolder surfaceHolder, GameView surfaceView) { 
     this.surfaceHolder = surfaceHolder; 
     this.surfaceView = surfaceView; 
     run = false; 
    } 

    public void setRunning(boolean run) { 
     Log.d("setRunning@DrawThread", "Run status is " + run); 
     this.run = run; 
    } 

    @Override 
    public void run() { 
     Canvas canvas = null; 
     while (run) { 
      try { 
       canvas = surfaceHolder.lockCanvas(null); 
       synchronized (surfaceHolder) { 
        surfaceView.onDraw(canvas); 
       } 
      } finally { 
       if (canvas != null) { 
        surfaceHolder.unlockCanvasAndPost(canvas); 
       } 
      } 
     } 
    } 
} 

BleenPaint

public class BleenPaint extends Paint { 
    public BleenPaint(int strokeWidth, Paint.Cap cap, Paint.Style style, 
        int color) { 
     setStrokeWidth(strokeWidth); 
     setAntiAlias(true); 
     setStrokeCap(cap); 
     setStyle(style); 
     setColor(color); 
    } 
} 

任何幫助表示讚賞。

Answer 1

在res中創建一個anim文件夾，並像這樣創建一個flipping.xml並在你的類中使用它。

<set android:interpolator="@android:anim/linear_interpolator"> 
<rotate android:fromDegrees="0" 
android:toDegrees="360" 
android:pivotX="50%" 
android:pivotY="50%" 
android:duration="500" 
android:startOffset="0" 
android:repeatCount="1" 
android:repeatMode="reverse"/></set> 

這樣在你的代碼&管理時間，你有多少時間想要的動畫。

AnimatorSet set; 
set = (AnimatorSet) AnimatorInflater.loadAnimator(this, R.anim.flipping); 
    set.setTarget(img_logo); 
    set.start(); 

    Timer timer = new Timer(); 
    timer.schedule(task, 2000);