Android图片旋转工具类，,import andro

Android图片旋转工具类，,import andro

import android.graphics.Bitmap;import android.graphics.Matrix;import android.media.ExifInterface;import java.io.IOException;/** * Created by pengkv on 15/12/2. * 图片旋转工具类 */public class ImageRotateUtil {    /**     * 读取图片的旋转的角度     *     * @param path 图片绝对路径     * @return 图片的旋转角度     */    public static int getBitmapDegree(String path) {        int degree = 0;        try {            // 从指定路径下读取图片，并获取其EXIF信息            ExifInterface exifInterface = new ExifInterface(path);            // 获取图片的旋转信息            int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION,                    ExifInterface.ORIENTATION_NORMAL);            switch (orientation) {                case ExifInterface.ORIENTATION_ROTATE_90:                    degree = 90;                    break;                case ExifInterface.ORIENTATION_ROTATE_180:                    degree = 180;                    break;                case ExifInterface.ORIENTATION_ROTATE_270:                    degree = 270;                    break;            }        } catch (IOException e) {            e.printStackTrace();        }        return degree;    }    /**     * 将图片按照某个角度进行旋转     *     * @param bm     需要旋转的图片     * @param degree 旋转角度     * @return 旋转后的图片     */    public static Bitmap rotateBitmapByDegree(Bitmap bm, int degree) {        Bitmap returnBm = null;        // 根据旋转角度，生成旋转矩阵        Matrix matrix = new Matrix();        matrix.postRotate(degree);        try {            // 将原始图片按照旋转矩阵进行旋转，并得到新的图片            returnBm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true);        } catch (OutOfMemoryError e) {            e.printStackTrace();            //当内存溢出时，利用递归进行重新旋转            while (returnBm == null) {                System.gc();                System.runFinalization();                returnBm = rotateBitmapByDegree(bm, degree);            }        }        if (returnBm == null) {            returnBm = bm;        }        if (bm != returnBm) {            bm.recycle();        }        return returnBm;    }}