最近在項目裡,發現使用三星手機拍照時照片被反轉
解覺方式:
在拍照後調用:(onActivityResult)
* 擷取圖檔的旋轉角度,有些系統把拍照的圖檔旋轉了,有的沒有旋轉
*/
int degree = readPictureDegree(f.getAbsolutePath());
BitmapFactory.Options opts=new BitmapFactory.Options();//擷取縮略圖顯示到螢幕上
opts.inSampleSize=2;
Bitmap cbitmap=BitmapFactory.decodeFile(f.getAbsolutePath(),opts);
/**
* 把圖檔旋轉為正的方向
*/
Bitmap newbitmap = rotaingImageView(degree, cbitmap);
iv.setImageBitmap(newbitmap);
/**
* 讀取圖檔屬性:旋轉的角度
* @param path 圖檔絕對路徑
* @return degree旋轉的角度
*/
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;
}
/*
* 旋轉圖檔
* @param angle
* @param bitmap
* @return Bitmap
*/
public static Bitmap rotaingImageView(int angle , Bitmap bitmap) {
//旋轉圖檔 動作
Matrix matrix = new Matrix();;
matrix.postRotate(angle);
System.out.println("angle2=" + angle);
// 建立新的圖檔
Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
return resizedBitmap;
}