最近在项目里,发现使用三星手机拍照时照片被反转
解觉方式:
在拍照后调用:(onActivityResult)
* 获取图片的旋转角度,有些系统把拍照的图片旋转了,有的没有旋转
*/
int degree = readPictureDegree(f.getAbsolutePath());
BitmapFactory.Options opts=new BitmapFactory.Options();//获取缩略图显示到屏幕上
opts.inSampleSize=2;
Bitmap cbitmap=BitmapFactory.decodeFile(f.getAbsolutePath(),opts);
/**
* 把图片旋转为正的方向
*/
Bitmap newbitmap = rotaingImageView(degree, cbitmap);
iv.setImageBitmap(newbitmap);
/**
* 读取图片属性:旋转的角度
* @param path 图片绝对路径
* @return degree旋转的角度
*/
public static int readPictureDegree(String path) {
int degree = 0;
try {
ExifInterface exifInterface = new ExifInterface(path);
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;
}
/*
* 旋转图片
* @param angle
* @param bitmap
* @return Bitmap
*/
public static Bitmap rotaingImageView(int angle , Bitmap bitmap) {
//旋转图片 动作
Matrix matrix = new Matrix();;
matrix.postRotate(angle);
System.out.println("angle2=" + angle);
// 创建新的图片
Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
return resizedBitmap;
}