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com.github.pwittchen:gesture-rx2

detects gestures on Android with listener and RxJava Observable.


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gesture Android Arsenal

detects gestures on Android with listener and RxJava Observable.

This project is a fork of better-gesture-detector by Polidea.

JavaDoc: http://pwittchen.github.io/gesture/RxJava2.x

Current BranchBranchArtifact IdBuild StatusMaven Central
RxJava1.xgestureBuild Status for RxJava1.xMaven Central
:ballot_box_with_check:RxJava2.xgesture-rx2Build Status for RxJava2.xMaven Central

Contents

Usage

Imperative way - Listener

Step 1: Create Gesture attribute in the Activity:

private Gesture gesture;

Step 2: Initialize Gesture object and add GestureListner:

gesture = new Gesture();

gesture.addListener(new GestureListener() {
  @Override public void onPress(MotionEvent motionEvent) {
    textView.setText("press");
  }

  @Override public void onTap(MotionEvent motionEvent) {
    textView.setText("tap");
  }

  @Override public void onDrag(MotionEvent motionEvent) {
    textView.setText("drag");
  }

  @Override public void onMove(MotionEvent motionEvent) {
    textView.setText("move");
  }

  @Override public void onRelease(MotionEvent motionEvent) {
    textView.setText("release");
  }

  @Override public void onLongPress(MotionEvent motionEvent) {
    textView.setText("longpress");
  }

  @Override public void onMultiTap(MotionEvent motionEvent, int clicks) {
    textView.setText("multitap [" + clicks + "]");
  }
});

Step 3: Override dispatchTouchEvent(MotionEvent) method:

@Override public boolean dispatchTouchEvent(MotionEvent event) {
  gesture.dispatchTouchEvent(event);
  return super.dispatchTouchEvent(event);
}

Reactive way - RxJava

Step 1: Create Gesture attribute and Subscription in the Activity:

private Gesture gesture;
private Disposable subscription;

Step 2: Initialize Gesture object and subscribe RxJava Observable:

gesture = new Gesture();

subscription = gesture.observe()
  .subscribeOn(Schedulers.computation())
  .observeOn(AndroidSchedulers.mainThread())
  .subscribe(event -> {
    textView.setText(event.toString());
  });

GestureEvent is an enum with the following API:

public enum GestureEvent {
  ON_PRESS,
  ON_TAP,
  ON_DRAG,
  ON_MOVE,
  ON_RELEASE,
  ON_LONG_PRESS,
  ON_MULTI_TAP;

  int getClicks();
  GestureEvent withClicks(int clicks);
}

Step 3: Override dispatchTouchEvent(MotionEvent) method:

@Override public boolean dispatchTouchEvent(MotionEvent event) {
  gesture.dispatchTouchEvent(event);
  return super.dispatchTouchEvent(event);
}

Step 4: Don't forget to dispose subscription when it's no longer needed:

@Override protected void onPause() {
  super.onPause();
  if (subscription != null && !subscription.isDisposed()) {
    subscription.dispose();
  }
}

Examples

Exemplary application is located in app directory of this repository.

If you would like to see sample app in Kotlin, check app-kotlin directory.

Download

latest version: Maven Central

replace x.y.z with the latest version

You can depend on library through Maven:

<dependency>
    <groupId>com.github.pwittchen</groupId>
    <artifactId>gesture-rx2</artifactId>
    <version>x.y.z</version>
</dependency>

or through Gradle:

dependencies {
  compile 'com.github.pwittchen:gesture-rx2:x.y.z'
}

Tests

To execute unit tests run:

./gradlew test

Code style

Code style used in the project is called SquareAndroid from Java Code Styles repository by Square available at: https://github.com/square/java-code-styles.

Static code analysis

Static code analysis runs Checkstyle, FindBugs, PMD and Lint. It can be executed with command:

./gradlew check

Reports from analysis are generated in library/build/reports/ directory.

Credits

Initial code base for this project is provided by Polidea.

License

Copyright 2012 Polidea
Copyright 2016 Piotr Wittchen

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

FAQs

Package last updated on 12 Mar 2020

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