拍照旋转图片
public class ImageUtil {public static final String TAG = ImageUtil.class.getSimpleName();/** * 判断图片是否需要翻转（正方向的不用翻转） * * @param fileName * @return */public static boolean needRotate(Context context, String fileName) {try {ExifInterface exif = new ExifInterface(fileName);int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,ExifInterface.ORIENTATION_UNDEFINED);LogUtil.d(TAG, "orientation is " + orientation);switch (orientation) {case ExifInterface.ORIENTATION_ROTATE_90:return true;case ExifInterface.ORIENTATION_ROTATE_270:return true;case ExifInterface.ORIENTATION_ROTATE_180:return true;}return false;} catch (IOException e) {e.printStackTrace();return false;}}/** * 获取翻转到正方向的的图片 * * @param fileName * @param maxWidth * @param maxHeight * @return */public static void rotatedBitmap(Context context, String fileName,String dstFile) {try {ExifInterface exif = new ExifInterface(fileName);int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,ExifInterface.ORIENTATION_UNDEFINED);LogUtil.d(TAG, "orientation is " + orientation);Matrix matrix = null;switch (orientation) {case ExifInterface.ORIENTATION_ROTATE_90:matrix = new Matrix();matrix.postRotate(90);break;case ExifInterface.ORIENTATION_ROTATE_270:matrix = new Matrix();matrix.postRotate(270);break;case ExifInterface.ORIENTATION_ROTATE_180:matrix = new Matrix();matrix.postRotate(180);break;}Bitmap bmp = getSmallBitmap(context,Uri.fromFile(new File(fileName)));if (matrix != null) {Bitmap bmp2 = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(),bmp.getHeight(), matrix, true);bmp.recycle();FileOutputStream fos = new FileOutputStream(dstFile);bmp2.compress(Bitmap.CompressFormat.JPEG, 100, fos);fos.close();bmp2.recycle();}} catch (IOException e) {e.printStackTrace();}}public static boolean compress(Context context, Uri src, File dst, int rate) {try {Bitmap bmp = getSmallBitmap(context, src);FileOutputStream fos = new FileOutputStream(dst);bmp.compress(Bitmap.CompressFormat.JPEG, rate, fos);bmp.recycle();bmp = null;fos.close();return true;} catch (Exception e) {e.printStackTrace();return false;}}public static int calculateInSampleSize(BitmapFactory.Options options,int reqWidth, int reqHeight) {final int height = options.outHeight;final int width = options.outWidth;int inSampleSize = 1;if (height > reqHeight || width > reqWidth) {final int heightRatio = Math.round((float) height/ (float) reqHeight);final int widthRatio = Math.round((float) width / (float) reqWidth);inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;}return inSampleSize;}public static Bitmap getSmallBitmap(Context context, Uri uri) {try {final BitmapFactory.Options options = new BitmapFactory.Options();options.inJustDecodeBounds = true;InputStream is = context.getContentResolver().openInputStream(uri);BitmapFactory.decodeStream(is, null, options);is.close();// Calculate inSampleSizeoptions.inSampleSize = calculateInSampleSize(options, 720, 1280);// Decode bitmap with inSampleSize setoptions.inJustDecodeBounds = false;is = context.getContentResolver().openInputStream(uri);Bitmap bmp = BitmapFactory.decodeStream(is, null, options);is.close();return bmp;} catch (Exception e) {e.printStackTrace();return null;}}}