如何保存后的Android位警察pression Exif数据中 [英] How to save Exif data after bitmap coppression in Android
本文介绍了如何保存后的Android位警察pression Exif数据中的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我需要从SD卡获取图像,创建,旋转和保存更改的图像。
我尝试使用这个code
I need to get image from sd card, create, rotate and save changed image. I try to use this code
Bitmap original = BitmapFactory.decodeFile(file.getAbsolutePath());
ExifInterface originalExif = new ExifInterface(file.getAbsolutePath());
int orientation = originalExif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED);
Matrix matrix = new Matrix();
int rotate = 90;
if(orientation == ExifInterface.ORIENTATION_ROTATE_90){
rotate = 180;
}else if(orientation == ExifInterface.ORIENTATION_ROTATE_180){
rotate = 270;
}else if(orientation == ExifInterface.ORIENTATION_ROTATE_270){
rotate = 0;
}
matrix.postRotate(rotate);
Bitmap bitmap = Bitmap.createBitmap(original, 0, 0, original.getWidth(), original.getHeight(), matrix, true);
try {
FileOutputStream out = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
original.recycle();
bitmap.recycle();
}
ExifInterface newExif = new ExifInterface(file.getAbsolutePath());
newExif.setAttribute(ExifInterface.TAG_ORIENTATION, String.valueOf(ExifInterface.ORIENTATION_ROTATE_90));
newExif.saveAttributes();
但我不能保存变化ExifInterface。这只是清除所有标签。
But i cant save change in ExifInterface. This just clear all the tags.
推荐答案
saveAttributes方法仅标签数据保存到JPEG文件。
saveAttributes method only Save the tag data into the JPEG file.
检查此链接
http://developer.android.com/reference/android/media/ExifInterface.html#saveAttributes()
所以,如果你改变了code此
So if you change your code this
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
这个
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
这将节省您的EXIF标签数据
it will save you exif tag data
希望这有助于
让我知道任何其他问题的情况下
Let me know in case of any other issue
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