Develop Reference

Opening image with Intent through absolute file path

I am new to android development.
I am trying to open the default gallery app to view an image like this:
Uri u = Uri.parse((String) gridView.getAdapter().getItem(position);
Intent i = new Intent();
i.setDataAndType(u, "image/*");
i.setAction(Intent.ACTION_VIEW);
i.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(i);
I provide the file paths to my images like this:
/storage/emulated/0/WhatsApp/Media/WhatsApp Images/IMG-20191023-WA0045.jpg
/storage/emulated/0/Pictures/9GAG/1565987862000.jpg
My App and Google Photos can display the image given this path, the Samsung Gallery( tested on Android Oreo) or the Xiaomi Gallery App (tested on Android X) can't find the image; also if i try to add "content://" or "file://" at the beginning.
I suspect that the apps want to have a Content URI or some kind of symbolic link without the "/storage/emulated/0/" part instead of a File URI. I searched for methods to get the content URI out of the file path, but didn't find any examples for Android X.
So what is the correct URI to pass on through the Intent and how do i get it?
Or maybe somebody knows a better way to just open the gallery app to a specific picture i provide by an absolute file path (Both External Storage and SD Card)?
Thank you in advance and greetings!

copied from this question here , this might work for you
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("content://media/external/images/media/16"))); /** replace with your own uri */

Thumbnail isn't refresh immediately

I'm making a file manager in which picture items have a small thumbnail.
I get thumbnail image by using MediaStore. Everything works fine. But when I rename or move a file, the thumbnail does not show up.
I've found a piece of code to refresh MediaStore:
getActivity().sendBroadcast(
new Intent(Intent.ACTION_MEDIA_MOUNTED,
Uri.parse("file://" + Environment.getExternalStorageDirectory())));
It worked but I must wait 4 or 5 second and refresh, then the thumbnail updates.
How to get thumbnail of image immediately after rename or moving?

What happen if you use ACTION_MEDIA_SCANNER_SCAN_FILE instead of ACTION_MEDIA_MOUNTED, (i.e. trigger a refresh for a single file instead of for the complete directory hierarchy) ?
You will need to replace the URI of the directory with the URI of the file, obtained for example using Uri.fromFile().
When you move or rename a file you should refresh the old and the new URIs.

The recommended way to update one specific image in Android is using ACTION_MEDIA_SCANNER_SCAN_FILE intent. And for smoother
You can check it at Basic Photo Handling Training in Android Developer Site.
private void galleryAddPic() {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(mCurrentPhotoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
If you want to show new thumbnail immediately for some missing files, you can do it by yourself. First, check the MediaStore as before, and if the returned thumbnail is null then generate your own one using ThumbnailUtils or BitmapFactory.
And, For handling a bitmap and displaying it, there is a quiet straightforward sample in Android Training Course.

Have you tried doing the scan directly on the directory you are changing? So instead of
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory())));
something like
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory() + "/path/to/your/folder")));
An alternative would be to manually use ThumbnailUtils.

Actually sending Intent.ACTION_MEDIA_MOUNTED broadcast intent is really ugly. Read this post http://androidyue.github.io/blog/2014/01/19/scan-media-files-in-android As to renaming files. You should remove the older file from the library and then add the new one into the library. I think this could help you.

How to save an image automatically to a specific folder or create a new folder if needed after taking a picture using the camera for android

I am currently trying to create an app which when taking a picture using the camera, when saving the image, it saves to a specific folder location and if the folder doesn't currently exist on the phone, it creates the folder and saves the file to that location. My code does not currently work, although I have tried. Could you please look at my code and advise me on what I need to do.
Here is the code:
else if(v==camera){
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File newDirectory = new File(Environment.getExternalStorageDirectory() + "App_Pictures/");
String filename = new String("image1.jpeg");
File outputFile = new File(newDirectory, filename);
outputFile.mkdirs();
startActivity(intent);
}

It looks like you're trying to get an external app to take a picture for you. If this is the case, you need to use startActivityForResult, not startActivity, because you want to receive the resulting photo. Then you will receive the result in the onActivityResult method of your activity. This process is described in detail here.
If you actually want your own app to take the picture, instead of an external app, you'll need to use a completely different approach. Here is an app that starts recording a video right when it is launched, and saves it to a directory on the SD card, so perhaps it's a useful starting point if you want to do it this way.

how to control/save images took with android camera programmatically?

i've been trying to create a camera-related app. i know that i could create it programmatically from top, but i would prefer using the one that the phone supports.
what i mean is, rather then creating the camera from 0, i would/could call the camera activity. after all, it provides all the system and gui that i needed.
however, the problem is i wanted the result/image took to be saved in a folder that i created before, rather then saving it in the default camera folder. and also renaming the image took that instant from the default 'image' to names that i preferred.
how do i control that ?

Try this. Here am saving picture to sdcard and also changing its name while saving.
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
Uri mUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
"pic"+ String.valueOf(System.currentTimeMillis()) + ".jpg"));
intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, mUri);

If you look at the Camera applicaton source code, it allows for startActivityForResult(..) that can return the image back to you. This is ideally what you'd like to do.
As a Little hint:
MediaStore

Use below method to take picture, SD_CARD_TEMP_DIR is the path and the image name you want it to store. Hope it help
private void takePicture(){
SD_CARD_TEMP_DIR = Environment.getExternalStorageDirectory() + File.separator + "farmerImage"+CassavaPref.getInstance(this).getImageSuffix()+".jpg";
file =new File(SD_CARD_TEMP_DIR);
Intent takePictureFromCameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
takePictureFromCameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
startActivityForResult(takePictureFromCameraIntent, 1111);
}

Camera intent/Activity - avoid saving to gallery

I am using the Camera Activity to capture the picture. I call it with the MediaStore.EXTRA_OUTPUT extra parameter. The image is correctly saved to provided path, put it is saved also to the gallery folder, so I can view the image in "Gallery" application - can I avoid this?
...
File file = new File(Environment.getExternalStorageDirectory(), "Test.jpg" );
iImageOutputUri = Uri.fromFile( file );
// Start camera intent to capture image
Intent intent = new Intent( MediaStore.ACTION_IMAGE_CAPTURE );
intent.putExtra( MediaStore.EXTRA_OUTPUT, iImageOutputUri );
startActivityForResult( intent, CAPTURE_IMAGE );
...
Thanks

Just replace your code
File file = new File(Environment.getExternalStorageDirectory(), "Test.jpg" );
with following code
File file = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES), "Test.jpg");
Description of getExternalFilesDir() :
Returns the absolute path to the directory on the primary external filesystem (that is somewhere on Environment.getExternalStorageDirectory()) where the application can place persistent files it owns. These files are internal to the applications, and not typically visible to the user as media.

How about saving your images with non-image extension ? Something like michael.photo instead of michael.jpg/png etc.That way Gallery app wont take them in and I have seen many such apps keepsafe for example does this.

I don't believe you can avoid this. The gallery application looks through your SD card for images and displays them automatically.