I am trying to read all the photos which I put to the sdcard via Android Device Monitor, I can get the path such as /storage/emulated/0/lemon.jpg
Could you please tell me how I could convert this photo into bitmap?
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Unclear. A jpg file actually **is** a bitmap*ped* picture. – Phantômaxx Oct 21 '17 at 13:31
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https://stackoverflow.com/questions/8710515/reading-an-image-file-into-bitmap-from-sdcard-why-am-i-getting-a-nullpointerexc – pleft Oct 21 '17 at 13:32
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`A jpg file actually is a bitmapped picture` ?????? OP means the Bitmap class. – greenapps Oct 21 '17 at 13:40
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@greenapps https://en.wikipedia.org/wiki/Bitmap ... 'nuff said. – Phantômaxx Oct 21 '17 at 13:43
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@ModularSynth, Well nice to know but not very helpfull if one wants a Bitmap instance for a jpg file. – greenapps Oct 21 '17 at 15:00
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@greenapps Then the OP should be a bit more specific, don't you agree? – Phantômaxx Oct 21 '17 at 15:09
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If you are targeting Android 4.4 (API level 19) and above you can use Storage Access Framework. Open a document using SAF, get Uri on onActivityResult() and use Uri to open image and turn it into a Bitmap.
Once you have the URI for a document, you can open it or do whatever else you want to do with it.
private Bitmap getBitmapFromUri(Uri uri) throws IOException {
ParcelFileDescriptor parcelFileDescriptor =
getContentResolver().openFileDescriptor(uri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
return image;
}
Thracian
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I try this method, but when I set the imageView, i get this error, Attempt to invoke virtual method 'void android.widget.ImageView.setImageBitmap(android.graphics.Bitmap)' on a null object reference – Ziiiijun Oct 21 '17 at 14:07