Android-将从相机拾取的图像放入照片库

Question

I am new to Android. This is my first question. I am testing on 4.4.4, KitKat.

I am using the Android Developers "Taking Photos Simply" code in my app. ( Taking Photos Simply Tutorial ) I want the photos taken by the user to be available to my app, but also available later in the gallery.

If I specify

File storageDir =  getExternalFilesDir (null);

Then various cameras work (camera, opencamera, DSLR camera), but after I leave my app the images do not appear in the gallery.

If I specify

File storageDir = Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES);

Then the behavior is the same, except for one camera app: DSLR Camera. The photo does appear in that app's camera directory which is visible using the gallery later.

I want this behavior for my app. I want the photos that the user takes to appear in a directory that they can later see using the gallery app. I don't want to create duplicate images, however.

I also want to save modified images later on to the same directory.

Thanks for any help

Answer 1

but after I leave my app the images do not appear in the gallery.

It may eventually. Gallery apps usually use the MediaStore , and your file may eventually be added to it. Use MediaScannerConnection and scanFile() to expedite this process.

Answer 2

You need to request the media scanner to scan a file and add it to the media database.Use this code.

 Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
            mediaScanIntent.setData(mMediaUri);
            sendBroadcast(mediaScanIntent);

and see ACTION_MEDIA_SCANNER_SCAN_FILE in android developer site.Here mMediaUri is the Uri of your file.