Take And Transform

Library created for simple taking images/photos/videos from gallery or camera source and then apply transformations such as crop, fit, rotate, etc.

Download

Add repository to your root build.gradle

repositories {
    jcenter()
}

dependencies {
  implementation 'com.idapgroup:tnt:latest-version'
}

TAKE usage sample

Activity and Fragment have the next extension functions for most common cases:

takeImageFromGallery, takeVideoFromGallery - opens android picker and returns taken photo/video Uri.
takeImageFromCamera, takeVideoFromCamera - opens android camera and returns captured photo/video Uri.

class ExampleActivity : FragmentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        galleryButton.setOnClickListener {
            takeImageFromGallery {
                proccessImageUri(it)
            }
        }
        cameraButton.setOnClickListener {
            takeVideoFromCamera {
                proccessVideoUri(it)
            }
        }
    }

}

Advanced usage

"As a developer, I don't want to write boilerplate code for permissions or saving related data to instance state."

Functions that were described above are just an extension functions for take.
take(source: Source<*>, permissions: PermissionParams.() -> Unit = {}, callback: F.(Uri) -> Unit)

Where:

source - one of Gallery(MimeType) or Camera(MediaType);
permission - dispatches permission denied events ;
callback - receiver for selected data Uri.

class ExampleActivity : FragmentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        galleryButton.setOnClickListener {
            take(
                source = Source.Gallery(MimeType.Video.Any),
                permissions = {
                    onDenied { showToast("Permission denied") }
                    onPermanentlyDenied { showToast("Permission permanently denied") }
                }) {
                proccessVideoUri(it)
            }
        }
        cameraButton.setOnClickListener {
            take(
                source = Source.Camera(MediaType.Image),
                permissions = {
                    onDenied { showToast("Permission denied") }
                    onPermanentlyDenied { showToast("Permission permanently denied") }
                }) {
                proccessImageUri(it)
            }
        }
    }

}

Keep in mind: when you are trying to use local variables inside callback function it must be primitives or implements Serializable interface. Parcelable isn't supported yet.

open class User(var image: Uri? = null)

class SerializableUser : User(), Serializable

class MyFragment : Fragment() {
    
    val user = User()
    
    fun takePhotoForUser() {
        val localUser = User()
		val localSerializableUser = SerializableUser()
        takeImageFromGallery { 
            user.image = it // OK!
			localSerializableUser.image = it // OK!
            localUser.image = it // Wrong!! Runtime exception
        }
    }
    
}

TRANSFORM usage sample

Tramsormation functions:

resize(width, height, scaleType) - change origin size of bitmap.
square(size: Int?, scaleType) - if size null - takes origin bitmap smaller side
Supported scale types: cropStart, cropCenter, cropEnd, fitStart, fitCenter, fitEnd, fitXY
rotate(degrees: Float) - rotates bitmap by selected degrees
background(color: Int) - set bitmap background for fitStart, fitCenter, fitEnd modes
blur(radius, sampling)
colorFilter(color)

val bitmap = file.transformAsBitmap {
    resize(100, 200, cropEnd)
    rotate(43f)
    colorFilter(a = 89, r = 34, g = 120, b = 34)
    background(Color.RED)
    blur()
}

Best android open-source packages and libraries.