我已经实现了一个自定义相机,我从中拍照,将其保存到媒体存储中并在之后立即显示。我一直受到保存图像方向问题的困扰,我尝试使用 ExifInterface 使用filePath 直接或使用来自 Android 图像内容提供程序的方向。
方向始终返回为 0。我已经使用过:
从画廊方向选择的 Android 图像始终为 0:Exif TAG
private int getExifOrientation(String pathName)
{
//for complete info on EXIF orientation visit: http://sylvana.net/jpegcrop/exif_orientation.html
ExifInterface exif=null;
try {
exif = new ExifInterface(pathName);
} catch (IOException e) {
// TODO Auto-generated catch block
Log.e("ImagePreviewActivity", "Exif data of the image could not be retreived");
}
int orientation=exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1);
return orientation;
}
private int getRotation(int orientation)
{
int rotation=0;
switch(orientation)
{
case ExifInterface.ORIENTATION_ROTATE_90:
//orientation values is 6
rotation=90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
//orientation value is 3
rotation=180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
//orientation value is 8
rotation=270;
break;
case -1:
Log.d("ImagePreviewActivity","Error getting orientation from Exif data.");
break;
case 1:
Log.d("ImagePreviewActivity", "Image is properly oriented");
default:
Log.d("ImagePreviewActivity", "The value of orientation is "+orientation);
}
return rotation;
}
private Bitmap rotateBitmap(String pathName,int rotation)
{
Bitmap bmp=BitmapFactory.decodeFile(pathName);
Matrix matrix=new Matrix();
matrix.postRotate(90);
//start from x=0,y=0 and filter=false
Bitmap rotatedBitmap=Bitmap.createBitmap(bmp,0,0,bmp.getWidth(),bmp.getHeight(),matrix,false);
return rotatedBitmap;
}
编辑:
当我在横向模式下拍照时,输出图像已经正确显示,但是在纵向模式下拍照时它返回一个旋转的图像(90度)。我目前正在使用基于 EXIF 的方法。