Sample demonstrates the use of MotionEvent properties to keep track of individual touches across multiple touch events.
This repository provides the same functionality as found in the official Google Samples BasicMultiTouch, but all Java code was ported to Scala.
The build still relies on gradle, using a special scala android plugin which allows to use the same workflow in Android Studio as for a normal Java project. For more serious Android Scala Development, I would recommend to try out sbt, as described on Scala on Android.
This is an example of keeping track of individual touches across multiple MotionEvents.
This sample uses a custom View (TouchDisplayView) that responds to
touch events and draws a colored circle for each touch point. The view holds
data related to a touch pointer, including its current position, pressure,
and its past touch history.
The View draws graphics based on data associated with each touch event to a canvas. A large circle indicates the current position of a touch, while smaller trailing circles represent previous positions for that touch. The size of the large circle is scaled depending on the pressure of the user's touch.
- Android SDK 24
- Android Build Tools v24.0.1
- Android Support Repository
This sample uses the Gradle build system. To build this project, use the "gradlew build" command or use "Import Project" in Android Studio.
- Google+ Community: https://plus.google.com/communities/105153134372062985968
- Stack Overflow: http://stackoverflow.com/questions/tagged/android
If you've found an error in this sample, please file an issue: https://github.com/googlesamples/android-BasicMultitouch
Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
Copyright 2016 The Android Open Source Project, Inc.
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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.