振る

shake

A Flutter package to detect phone shakes with directional information.

Features

• Shake detection with directional information (X, Y, Z axes)
• Force measurement
• Noise filtering option
• Configurable shake count and timing parameters

Installation

Add this to your package's pubspec.yaml file:

dependencies:
  shake: ^3.0.0

Usage

Basic Usage

ShakeDetector detector = ShakeDetector.autoStart(
  onPhoneShake: (ShakeEvent event) {
    // Access detailed shake information
    print('Shake direction: ${event.direction}');
    print('Shake force: ${event.force}');
    print('Shake timestamp: ${event.timestamp}');
  }
);

OR

ShakeDetector detector = ShakeDetector.waitForStart(
  onPhoneShake: (ShakeEvent event) {
    // Handle the shake event
  }
);
    
detector.startListening();

Breaking Changes in v3.0.0

Version 3.0.0 introduced a breaking change where onPhoneShake now receives a ShakeEvent parameter with information about direction, force, and timestamp.

If you're upgrading from v2.x, you need to update your callback to accept the ShakeEvent parameter:

// Before (v2.x)
ShakeDetector detector = ShakeDetector.autoStart(
  onPhoneShake: () {
    print('Shake detected!');
  }
);

// After (v3.x)
ShakeDetector detector = ShakeDetector.autoStart(
  onPhoneShake: (ShakeEvent event) {
    print('Shake detected!');
    // Now you can also access event.direction, event.force, etc.
  }
);

Noise Filtering

ShakeDetector detector = ShakeDetector.autoStart(
  onPhoneShake: (ShakeEvent event) {
    // Handle shake
  },
  useFilter: true, // Enable noise filtering for more reliable detection
);

Custom Configuration

ShakeDetector detector = ShakeDetector.autoStart(
  onPhoneShake: (ShakeEvent event) {
    // Handle shake
  },
  // Configure sensitivity - lower value makes it more sensitive
  shakeThresholdGravity: 2.0,
  // Minimum time between shake detections (ms)
  shakeSlopTimeMS: 300, 
  // Reset shake count after this time (ms)
  shakeCountResetTime: 2000,
  // Number of shakes required before triggering
  minimumShakeCount: 2,
);

Directional Shake Information

The ShakeEvent provides the direction of the shake through the direction property:

ShakeDetector detector = ShakeDetector.autoStart(
  onPhoneShake: (ShakeEvent event) {
    switch (event.direction) {
      case ShakeDirection.x:
        print('Shaken horizontally (left/right)');
        break;
      case ShakeDirection.y:
        print('Shaken vertically (up/down)');
        break;
      case ShakeDirection.z:
        print('Shaken forward/backward');
        break;
      case ShakeDirection.undefined:
        print('Complex shake pattern');
        break;
    }
  }
);

Stopping Detection

To stop listening:

detector.stopListening();

Configuration Parameters

Parameter	Description	Default
shakeThresholdGravity	Acceleration threshold for shake detection (in g)	2.7
shakeSlopTimeMS	Minimum time between shake detections (in ms)	500
shakeCountResetTime	Time before shake count resets (in ms)	3000
minimumShakeCount	Number of shakes required before shake is triggered	1
useFilter	Whether to apply noise filtering	false

License

This project is licensed under the MIT License - see your project's license file for details.