Android平滑地旋轉surfaceView相對於用戶

Question

在Android中，如何在SurfaceView上繪製旋轉/翻轉硬幣wrt用戶。使用動畫並在ImageView中顯示翻轉硬幣非常容易，但我需要在SurfaceView上使用相同的平滑度。有沒有什麼方法可以在ImageView中翻動動畫，然後在每個瞬間取出它的內容，然後在SurfaceView上連續繪製它？

Answer 1

您可以使用Matrix類來執行繪製位圖上的這些操作。

像

Paint paint = new Paint(); 
    paint.setAntiAlias(true); 
    Matrix needleTransMatrix = new Matrix(); 
    needleTransMatrix.postRotate(rotationAngle,needleImage.getWidth()/2,needleImage.getHeight()); 
    needleTransMatrix.postTranslate(centerX+METER_OFFSET-needleImage.getWidth()/2, centerY-needleImage.getHeight()); 

    Matrix dialTransMatrix = new Matrix(); 
    dialTransMatrix.postRotate(rotationAngle,dialImage.getWidth()/2,dialImage.getHeight()/2); 
    dialTransMatrix.postTranslate(METER_OFFSET,0); 

    canvas.drawBitmap(bgImage, METER_OFFSET, 0, paint); 
    canvas.drawBitmap(dialImage, dialTransMatrix, paint); 
    canvas.drawBitmap(needleImage, needleTransMatrix, paint); 

以下是引出線，對此，我是在談論

private class AnimationThread extends Thread{ 

    private boolean isRunning = true; 
    private int destinationNeedlePosition = NEEDLE_POSITION_ENQURIES; 

    public AnimationThread(int destinationNeedlePosition) { 
     this.destinationNeedlePosition = destinationNeedlePosition; 
    } 

    public void cancelAnimation(){ 
     isRunning = false; 
    } 

    @Override 
    public void run() { 

     int destinationAngle = destinationNeedlePosition *45; 

     while(isRunning && destinationAngle != rotationAngle){ 
      if(destinationAngle > rotationAngle) 
       rotationAngle++; 
      else 
       rotationAngle--; 
      postInvalidate(); 
      try { 
       sleep(10); 
      } catch (InterruptedException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 
    } 

}