Sample demonstrates the use of MotionEvent properties to keep track of individual touches across multiple touch events.

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 28
• Android Build Tools v28.0.3
• 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.

• Stack Overflow: http://stackoverflow.com/questions/tagged/android

If you've found an error in this sample, please file an issue: https://github.com/android/input

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.