Une seule intention de laisser l'utilisateur prendre une photo ou de choisir l'image de la galerie dans Android

vous pouvez essayer de faire quelque chose comme ceci:

// ...
// Within your enclosing Class
// ...
private static final int SELECT_PICTURE = 1;

// ... 

Intent pickIntent = new Intent();
pickIntent.setType("image/*");
pickIntent.setAction(Intent.ACTION_GET_CONTENT);

Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

String pickTitle = "Select or take a new Picture"; // Or get from strings.xml
Intent chooserIntent = Intent.createChooser(pickIntent, pickTitle);
chooserIntent.putExtra
(
  Intent.EXTRA_INITIAL_INTENTS, 
  new Intent[] { takePhotoIntent }
);

startActivityForResult(chooserIntent, SELECT_PICTURE);

pour savoir comment gérer le résultat de l'activité, référez-vous à cette question

Note: un point critique est la façon de déterminer si la caméra ou la galerie a été utilisée. Cela est montré dans cet exemple de code: https://stackoverflow.com/a/12347567/294884

vous pouvez procéder ainsi dans votre activité:

private static final int REQUEST_CODE_PICTURE= 1;

    /**
     * Click on View to change photo. Sets into View of your layout, android:onClick="clickOnPhoto"
     * @param view View
     */
    public void clickOnPhoto(View view) {
        Intent pickIntent = new Intent();
        pickIntent.setType("image/*");
        pickIntent.setAction(Intent.ACTION_GET_CONTENT);
        Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        String pickTitle = "Take or select a photo";
        Intent chooserIntent = Intent.createChooser(pickIntent, pickTitle);
        chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Intent[] { takePhotoIntent });
        startActivityForResult(chooserIntent, REQUEST_CODE_PICTURE);
    }

alors, ajoutez toujours dans votre activité la méthode onActivityResult:

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_CODE_PICTURE && resultCode == Activity.RESULT_OK) {
            if (data == null) {
                return;
            }
            try {
                InputStream inputStream = getContentResolver().openInputStream(data.getData());
                Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
                imgPhoto.setImageBitmap(bitmap);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
        }
    }

ma réponse est presque identique à la solution @Macarse mais j'ajoute également une intention supplémentaire de montrer des applications de Galerie (Ex: Google Photos) et est écrit en Kotlin:

val REQUEST_CODE_GET_IMAGE = 101

private fun addProfileImage() {
    val pickImageFileIntent = Intent()
    pickImageFileIntent.type = "image/*"
    pickImageFileIntent.action = Intent.ACTION_GET_CONTENT

    val pickGalleryImageIntent = Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI)

    val captureCameraImageIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)

    val pickTitle = "Capture from camera or Select from gallery the Profile photo"
    val chooserIntent = Intent.createChooser(pickImageFileIntent, pickTitle)
    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, arrayOf(captureCameraImageIntent, pickGalleryImageIntent))
    startActivityForResult(chooserIntent, REQUEST_CODE_GET_IMAGE)
}

exemple Bonus:

private var imageTempFile: File? = null
private var imageMimeType: String? = null

private fun extractImage(intent: Intent?) {
    val imageUri = intent?.data
    imageUri?.let {
        Glide.with(this)
                .load(imageUri)
                .into(profileImageCiv)
        imageTempFile = MediaUtils.copyContentFromUriToCacheFile(this, imageUri, Settings.DIRECTORY_CACHE_TEMP_PROFILE_IMAGE)
        imageMimeType = MediaUtils.getMimeType(this, imageUri)
    } ?: run {
        intent?.extras?.get("data")?.let { bitmap ->    // Bitmap was returned as raw bitmap
            Glide.with(this)
                    .load(bitmap)
                    .into(profileImageCiv)
            imageTempFile = MediaUtils.writeBitmapToCacheFile(this, bitmap as Bitmap, Settings.DIRECTORY_CACHE_TEMP_PROFILE_IMAGE)
            imageMimeType = "image/jpeg"    // The bitmap was compressed as JPEG format. The bitmap itself doesn't have any format associated to it
        } ?: run {
            imageTempFile = null
            imageMimeType = null
            Log.e("Intent data is null.")
            Log.d("Error during photo selection")
        }
    }
}