旋转图片 Matrix

[android]代码库

				int ScaleAngle = -2 //旋转角度

				/* ScaleTimes=1，维持1:1的宽高比例 */
				int newWidth = widthOrig * ScaleTimes;
				int newHeight = heightOrig * ScaleTimes;

				float scaleWidth = ((float) newWidth) / widthOrig;
				float scaleHeight = ((float) newHeight) / heightOrig;
				Matrix matrix = new Matrix();
				/* 使用Matrix.postScale设定维度 */
				matrix.postScale(scaleWidth, scaleHeight);
				/* 使用Matrix.postRotate方法旋转Bitmap */
				// matrix.postRotate(5*ScaleAngle);
				matrix.setRotate(5 * ScaleAngle);
				/* 建立新的Bitmap对象 */
				Bitmap resizedBitmap = Bitmap.createBitmap(mySourceBmp, 0, 0,
						widthOrig, heightOrig, matrix, true);