How to detect Double Tap in Android

You could search harder...

http://docs.unity3d.com/Documentation/ScriptReference/Touch-tapCount.html

as in:

 for(touch in Input.touches){
 if(touch.tapCount == 2)
 //DoSomething();
 }

i'm using EasyTouch and it works great on android. check there gestures list they can handle (note On_DoubleTap...) http://www.blitz3dfr.com/Doc/ET3/class_easy_touch.html

just to make it clear, i'm not related to them... only suggest the as solution. :)

As Vandell suggests, tracking your own touches is the go.

For quick code sample - Check the Joystick.js file in the mobile standard assets. In a nutshell:

• Set a time window - say avg. human reaction time

• Store your own script level scoped 'tapCount' variable

• In update, on each tap, test if this tap occurred within the time window, if yes, tapCount++

From Joystick.js

     if ( tapTimeWindow > 0 ) {
         tapTimeWindow -= Time.deltaTime;
     }
     else {
         tapCount = 0;
     }
     if ( tapTimeWindow > 0 )
       tapCount++;
     else
     {
       tapCount = 1;
       tapTimeWindow = tapTimeDelta;
     }

HTH

I know this post i dead. But for the people still looking for an awnser, this is my shot at it. Im am still a beginner so gime me some feedback.

 public class JumpTowardsTap : MonoBehaviour {
 
     int TapCount;
     public float MaxDubbleTapTime;
     float NewTime;
 
     void Start () {
         TapCount = 0;
     }
 
     void Update () {
 if (Input.touchCount == 1) {
             Touch touch = Input.GetTouch (0);
             
             if (touch.phase == TouchPhase.Ended) {
                 TapCount += 1;
             }
 
             if (TapCount == 1) {
                 
                 NewTime = Time.time + MaxDubbleTapTime;
             }else if(TapCount == 2 && Time.time <= NewTime){
                 
                 //Whatever you want after a dubble tap    
                 print ("Dubble tap");
 
                     
                 TapCount = 0;
             }
 
         }
         if (Time.time > NewTime) {
             TapCount = 0;
         }
     }
 }
 

bellow function works well:

 public static bool IsDoubleTap(){
         bool result = false;
         float MaxTimeWait = 1;
         float VariancePosition = 1;
 
         if( Input.touchCount == 1  && Input.GetTouch(0).phase == TouchPhase.Began)
         {
             float DeltaTime = Input.GetTouch (0).deltaTime;
             float DeltaPositionLenght=Input.GetTouch (0).deltaPosition.magnitude;
 
             if ( DeltaTime> 0 && DeltaTime < MaxTimeWait && DeltaPositionLenght < VariancePosition)
                 result = true;                
         }
         return result;
     }