romannurik

/**
 * Creates a 'ghost' bitmap version of the given source drawable (ideally a BitmapDrawable).
 * In the ghost bitmap, the RGB values take on the values from the 'color' argument, while
 * the alpha values are derived from the source's grayscaled RGB values. The effect is that
 * you can see through darker parts of the source bitmap, while lighter parts show up as
 * the given color. The 'invert' argument inverts the computation of alpha values, and looks
 * best when the given color is a dark.
 */
private Bitmap createGhostIcon(Drawable src, int color, boolean invert) {
    int width = src.getIntrinsicWidth();

LouisCAD

import android.arch.lifecycle.GenericLifecycleObserver
import android.arch.lifecycle.Lifecycle
import android.arch.lifecycle.Lifecycle.Event.ON_DESTROY
import android.arch.lifecycle.LifecycleOwner
import kotlinx.coroutines.experimental.CoroutineScope
import kotlinx.coroutines.experimental.Dispatchers
import kotlinx.coroutines.experimental.Job
import kotlinx.coroutines.experimental.android.Main

fun Lifecycle.createJob(cancelEvent: Lifecycle.Event = ON_DESTROY): Job {

nickbutcher

<?xml version="1.0" encoding="utf-8"?>
<!--
  Copyright 2018 Google Inc.
  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.

chrisbanes

/*
 * Copyright 2018 Google LLC
 *
 * 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

alexjlockwood

import android.content.Context
import android.graphics.Canvas
import android.graphics.Color
import android.graphics.Paint
import android.util.AttributeSet
import android.view.View
import androidx.annotation.ColorInt
import java.lang.Math.pow
import kotlin.math.cos