ColoredShadowImageView

ColoredShadowImageView allows you to create a beautiful shadow around the image based on corresponding area colors.

Download sample apk

The current minSDK version is API level 16.

Download

Gradle:

implementation 'com.github.armcha:ColoredShadowImageView:1.1.0'

Setup and usage

You also need to add RenderScript to your app module. Add these lines to the defaultConfig block of your build.gradle.
```
renderscriptTargetApi YOUR_TARGET_SDK_VERSION
renderscriptSupportModeEnabled true
```

Static image

<io.github.armcha.coloredshadow.ShadowImageView
     android:id="@+id/shadowImage"
     android:layout_width="300dp"
     android:layout_height="400dp"
     android:src="@drawable/android"></io.github.armcha.coloredshadow.ShadowImageView>

  findViewById<ShadowImageView>(R.id.shadowImage).apply {
       setImageResource(R.drawable.android)
  }

If you are using Glide, use it in this way.
Glide transformations are also supported.
Now we have some limitations for Glide transitions.

//shadowView.radiusOffset = 0.4f
//shadowView.shadowColor = ContextCompat.getColor(context,R.color.green)
GlideApp.with(itemView.context)
                    .load(item.imageUrl)
                    .placeholder(R.drawable.place_holder)
                    .error(R.drawable.place_holder)
                    //.transform(CircleCrop())
                    .into(object : ViewTarget<ImageView, Drawable>(shadowView) {
                        override fun onLoadStarted(placeholder: Drawable?) {
                            super.onLoadStarted(placeholder)
                            shadowView.setImageDrawable(placeholder, withShadow = false)
                        }
                        override fun onLoadCleared(placeholder: Drawable?) {
                            super.onLoadCleared(placeholder)
                            shadowView.setImageDrawable(placeholder, withShadow = false)
                        }
                        override fun onLoadFailed(errorDrawable: Drawable?) {
                            super.onLoadFailed(errorDrawable)
                            shadowView.setImageDrawable(errorDrawable, withShadow = false)
                        }
                        override fun onResourceReady(resource: Drawable, transition: Transition<in Drawable>?) {
                            shadowView.setImageDrawable(resource)
                        }
                    })

Customizations

You can change shadow radius.
Default radius is 0.5. You can change it between 0 and 1. (0 < radius ≤ 1)

  shadowImageView.radiusOffset = 0.4f
  shadowImageView.setImageResource(R.drawable.android)

You can also change the shadow color

  shadowImageView.shadowColor = ContextCompat.getColor(context,R.color.green) //or Color.RED
  shadowImageView.setImageResource(R.drawable.android)

or from xml

   app:radiusOffset="0.6"
   app:shadowColor="@color/colorAccent"

Current limitations:

You can’t use the library when setting width or height to WRAP_CONTENT

Add proguard rules if necessary:

-keep class android.support.v8.renderscript.** { *; }

Contact

Pull requests are more than welcome.

Email: chatikyana@gmail.com

Medium: @chatikyan"">https://medium.com/@chatikyan

Twitter: https://twitter.com/ArmanChatikyan

Facebook: https://web.facebook.com/chatikyana

Google +: https://plus.google.com/+ArmanChatikyan

Website: https://armcha.github.io/

License

  ColoredShadowImageView
  Copyright (c) 2018 Arman Chatikyan (https://github.com/armcha/ColoredShadowImageView).
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
     http://www.apache.org/licenses/LICENSE-2.0
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.