Spotlight

Gradle

dependencies {
    implementation 'com.github.takusemba:spotlight:x.x.x'
}

Usage

val spotlight = Spotlight.Builder(this)
    .setTargets(firstTarget, secondTarget, thirdTarget ...)
    .setBackgroundColor(R.color.spotlightBackground)
    .setDuration(1000L)
    .setAnimation(DecelerateInterpolator(2f))
    .setContainer(viewGroup)
    .setOnSpotlightListener(object : OnSpotlightListener {
      override fun onStarted() {
        Toast.makeText(this@MainActivity, "spotlight is started", Toast.LENGTH_SHORT).show()
      }
      override fun onEnded() {
        Toast.makeText(this@MainActivity, "spotlight is ended", Toast.LENGTH_SHORT).show()
      }
    })
    .build()         

If you want to show Spotlight immediately, you have to wait until views are laid out.

// with core-ktx method.
view.doOnPreDraw { Spotlight.Builder(this)...start() }

Target

Create a Target to add Spotlight.

Target is a spot to be casted by Spotlight. You can add multiple targets to Spotlight.

val target = Target.Builder()
    .setAnchor(100f, 100f)
    .setShape(Circle(100f))
    .setEffect(RippleEffect(100f, 200f, argb(30, 124, 255, 90)))
    .setOverlay(layout)
    .setOnTargetListener(object : OnTargetListener {
      override fun onStarted() {
        makeText(this@MainActivity, "first target is started", LENGTH_SHORT).show()
      }
      override fun onEnded() {
        makeText(this@MainActivity, "first target is ended", LENGTH_SHORT).show()
      }
    })
    .build()

Start/Finish Spotlight

val spotlight = Spotlight.Builder(this)...start()

spotlight.finish()

Next/Previous/Show Target

val spotlight = Spotlight.Builder(this)...start()

spotlight.next()

spotlight.previous()

spotlight.show(2)

Custom Shape

Shape defines how your target will look like. Circle and RoundedRectangle shapes are already implemented, but if you want your custom shape, it's arhivable by implementing Shape interface.

class CustomShape(
    override val duration: Long,
    override val interpolator: TimeInterpolator
) : Shape {

  override fun draw(canvas: Canvas, point: PointF, value: Float, paint: Paint) {
    // draw your shape here.
  }
}

Custom Effect

Effect allows you to decorates your target. RippleEffect and FlickerEffect shapes are already implemented, but if you want your custom effect, it's arhivable by implementing Effect interface.

class CustomEffect(
    override val duration: Long,
    override val interpolator: TimeInterpolator,
    override val repeatMode: Int
) : Effect {

  override fun draw(canvas: Canvas, point: PointF, value: Float, paint: Paint) {
    // draw your effect here.
  }
}

Sample

Clone this repo and check out the app module.

Author

• Taku Semba
  • Github - (https://github.com/takusemba)
  • Twitter - (https://twitter.com/takusemba)
  • Facebook - (https://www.facebook.com/takusemba)

Licence

Copyright 2017 Taku Semba.

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.