Android实现图片随手指旋转功能(2)

Bitmap adjustPhotoRotation(Bitmap bm, final int orientationDegree) {
  if (orientationDegree == 0) {
   return bm;
  }
  Matrix m = new Matrix();
  m.setRotate(orientationDegree, (float) bm.getWidth() / 2,
    (float) bm.getHeight() / 2);

try {
   Bitmap bm1 = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
     bm.getHeight(), m, true);

return bm1;

} catch (OutOfMemoryError ex) {
  }

return null;

}

private void drawInCenter(Canvas canvas, Bitmap bitmap, float left,
   float top, String text) {
  canvas.drawBitmap(bitmap, left - bitmap.getWidth() / 2,
    top - bitmap.getHeight() / 2, null);
 }

// 子控件位置改变重新计算角度
 private int computeCurrentAngle(float x, float y) {
  // 根据圆心坐标计算角度
  float distance = (float) Math
    .sqrt(((x - mPointX) * (x - mPointX) + (y - mPointY)
      * (y - mPointY)));
  int degree = (int) (Math.acos((x - mPointX) / distance) * 180 / Math.PI);
  if (y < mPointY) {
   degree = -degree;
  }
  if (degree < 0) {
   degree += 360;
  }

// Log.i("RoundSpinView", "x:" + x + ",y:" + y + ",degree:" + degree);
  return degree;
 }

// 获取距离圆心的距离
 private float getDistance(float x, float y) {
  // 根据圆心坐标计算角度
  float distance = (float) Math
    .sqrt(((x - mPointX) * (x - mPointX) + (y - mPointY)
      * (y - mPointY)));
  return distance;
 }

//点击
 private boolean SetClick(float x, float y) {
  float distance = getDistance(x, y);
  if (mAngle>10||mAngle<-10) {
   return false;
  }else if(endTime-beginTime>1000){
   return false;
  }
  if (distance < bitmapBig.getWidth() / 2) {
   int mod = 0;
   
   if (beginAngle < 90 || 330 < beginAngle) {
    mod = (imageIndex+3-1)%3;       
   }
   else if (90 < beginAngle && 210 > beginAngle) {
    mod = (imageIndex+3-2)%3;   
   }
   else{
    mod = imageIndex;   
   }
   //回调到主界面进行处理。
   listener.onModClick(mod);
  }
  return true;
 }
 
 public interface RotateViewListener { 
  void onModClick(int mode);
  void onModChange(int mode);
 }
}