檢測手勢是順時針還是逆時針

Question

我在課堂上使用OnGestureListener。 我想找出我做的手勢是順時針還是逆時針，並希望在這些手勢上執行不同的任務。 OnGestureListener是否提供此功能？我怎樣才能做到這一點？

Answer 1

看看這個例子能夠以任何方式幫助你！

http://mobile.tutsplus.com/tutorials/android/android-sdk-creating-a-rotating-dialer/

Answer 2

if(prediction.size() > 0){ 
    String gesturePerformed = prediction.get(0).name; 
    if(gesturePerformed.equals("up")){ 
    myForeground.canvasUp(); 
    Toast.makeText(MyGameActivity.this, 
    "up", Toast.LENGTH_LONG).show(); 
    }else if(gesturePerformed.equals("down")){ 
    myForeground.canvasDown(); 
    Toast.makeText(MyGameActivity.this, 
    "down", Toast.LENGTH_LONG).show(); 
    }else if(gesturePerformed.equals("left")){ 
    myForeground.canvasLeft(); 
    Toast.makeText(MyGameActivity.this, 
    "left", Toast.LENGTH_LONG).show(); 
    }else if(gesturePerformed.equals("right")){ 
    myForeground.canvasRight(); 
    Toast.makeText(MyGameActivity.this, 
    "right", Toast.LENGTH_LONG).show(); 
    }else if(gesturePerformed.equals("clockwise")){ 
    myForeground.canvasClockwise(); 
    Toast.makeText(MyGameActivity.this, 
    "clockwise", Toast.LENGTH_LONG).show(); 
    }else if(gesturePerformed.equals("anti-clockwise")){ 
    myForeground.canvasAntiClockwise(); 
    Toast.makeText(MyGameActivity.this, 
    "anti-clockwise", Toast.LENGTH_LONG).show(); 
    }else if(gesturePerformed.equals("enlarge")){ 
    myForeground.canvasEnlarge(); 
    Toast.makeText(MyGameActivity.this, 
    "enlarge", Toast.LENGTH_LONG).show(); 
    }else if(gesturePerformed.equals("reduce")){ 
    myForeground.canvasReduce(); 
    Toast.makeText(MyGameActivity.this, 
    "reduce", Toast.LENGTH_LONG).show(); 
    } 
} 

}

出處：http：//android-coding.blogspot.in/2012/03/gestures-detection-and-canvas-scale.html