Single intent to let user take picture OR pick ima

问题:

I'm developing an app for Android 2.1 upwards. I want to enable my users to select a profile picture within my app (I'm not using the contacts framework).

The ideal solution would be to fire an intent that enables the user to select an image from the gallery, but if an appropriate image is not available then use the camera to take a picture (or vice-versa i.e. allow user to take picture but if they know they already have a suitable image already, let them drop into the gallery and pick said image).

Currently I can do one or the other but not both.

If I go directly into camera mode using MediaStore.ACTION_IMAGE_CAPTURE then there is no option to drop into the gallery.

If I go directly to the gallery using Intent.ACTION_PICK then I can pick an image but if I click the camera button (in top right hand corner of gallery) then a new camera intent is fired. So, any picture that is taken is not returned directly to my application. (Sure you can press the back button to drop back into the gallery and select image from there but this is an extra unnecessary step and is not at all intuitive).

So is there a way to combine both or am I going to have to offer a menu to do one or the other from within my application? Seems like it would be a common use case...surely I'm missing something?

回答1:

UPDATE: The other answer, using EXTRA_INITIAL_INTENTS, is a better one at this point. At the time I wrote my answer, EXTRA_INITIAL_INTENTS did not yet exist, as it was added in API Level 5.

So is there a way to combine both or am I going to have to offer a menu to do one or the other from within my application?

Write your own gallery that has the features you desire.

I would think a menu would be simpler.

Seems like it would be a common use case...surely I'm missing something?

The developer next to you will think the gallery should allow you to pick from the local gallery or else hop out to Flickr to make a selection from there. Another developer will think the camera should not only allow to "take a picture" via the camera but to "take a picture" via choosing something from the gallery, inverting things from the way you envision it. Yet another developer will think that the gallery should allow picking from the local gallery, or Flickr, or the camera, or a network-attached webcam. Still another developer will think that the gallery is stupid and users should just pick files via a file explorer. And so on.

All of this in an environment (mobile phones) where flash for the OS is at a premium.

Hence, IMHO, it is not completely shocking that the core Android team elected to provide building blocks for you to assemble as you see fit, rather than trying to accommodate every possible pattern.

回答2:

You can try doing something like this:

// ...
// 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);

To see how to handle the activitiy's result, please refer to this question

---

Note: a critical point is how to determine whether the camera or gallery was used. That is shown in this code example: https://stackoverflow.com/a/12347567/294884

回答3:

You can proceed in this way in your Activity:

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);
    }

Then, add always in your Activity the method 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();
            }
        }
    }

回答4:

My Answer is almost identical to @Macarse solution but I also add an additional intent to show gallery apps (Ex: Google Photos) and is written in 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)
}

Bonus example:

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")
        }
    }
}