Develop Reference

MediaStore.Media.Images Android/ Kotlin: How to hide photos saved in gallery from user?

I am using the following program to capture an image using the MediaStore.ACTION_IMAGE_CAPTURE cameraIntent.
Code:
val values = ContentValues()
values.put(MediaStore.Images.Media.TITLE, "New Picture")
values.put(MediaStore.Images.Media.DESCRIPTION, "From the Camera")
imageUri = contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
//camera intent
val cameraIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri)
startActivityForResult(cameraIntent, IMAGE_CAPTURE_CODE)
I have the following questions:
The image that has been captured is being shown in the gallery. How do I hide that from the user?
After taking the image, I am setting the photo in a ImageView that is lagging the activity. How can I compress the image when I am setting it to the ImageView?
Is there a way to click photos only in potrait mode?
I tried changing the EXTERNAL_CONTENT_URI to INTERNAL_CONTENT_URIbut that gives me the following warning: Writing to internal storage is not supported android

As soon as you use the media store they are in 'the gallery'.
So you have to use getFilesDir() and classic file methods to save them for your eyes only.

The image that has been captured is being shown in the gallery. How do
I hide that from the user?
As blackapps have said, and in accordance to this documentation, which states that MediaStore API uses shared storage, you can't use MediaStore API to store in app-specific storage (Not the Gallery).
This documentation provides an example of storing photos to app specific storage using getExternalFileDir().
After taking the image, I am setting the photo in a ImageView that is
lagging the activity. How can I compress the image when I am setting
it to the ImageView?
Try Glide, a fast and efficient image loading library for Android. In addition, as I'm typing this, CommonsWare has also recommended other Image loading libraries such as Picasso and Coil.
Is there a way to click photos only in portrait mode?
Perhaps this SO Q&A might help. You can set theclickable attribute of the ImageView programmatically or declaratively.

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 */

Android Java: Get Bitmap in Gallery

I have a Bitmap saved in the directory: Environment.getExternalStorageDirectory()+ File.separator + "Images" in a subdirectory. With a fileManager i can find the image and open it. But in the Gallery of the Smartphone i can't find the Image.
How can i get it there?

To be make you file known by the Gallery you need to call the MediaScanner:
Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intent.setData(Uri.fromFile(file));
sendBroadcast(intent);
See also: https://www.grokkingandroid.com/adding-files-to-androids-media-library-using-the-mediascanner/

You can actually directly access the Pictures directory. To do this, use
getExternalStoragePublicDirectory(String type)
, where type is equal to Environment.DIRECTORY_PICTURES.
See http://developer.android.com/reference/android/os/Environment.html#getExternalStoragePublicDirectory%28java.lang.String%29 for more info.
That's cleaner than supposing that pictures are always stored in a directory called "Images"...
Now to force the Gallery to register the change, look at https://stackoverflow.com/a/15837638/2984973 .
To quote the answer, you want to broadcast an intent specifying your new picture, likewise:
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(myNewFile)));

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.