Detecting a long press with Android

Question

I am currently using  onTouchEvent MotionEvent event       to detect when the user presses my glSurfaceView is there a way to detect when a long click is made  I m guessing if I can t find much in the dev docs then it will be some sort of work around method  Something like registering ACTION DOWN and seeing how long it is before ACTION UP   How do you detect long presses on android using opengl-es

User · Answer

I have a code which detects a click  a long click and movement  It is fairly a combination of the answer given above and the changes i made from peeping into every documentation page      Declare this flag globally boolean goneFlag   false     Put this into the class final Handler handler   new Handler         Runnable mLongPressed   new Runnable              public void run                  goneFlag   true                Code for long click                        onTouch code  Override     public boolean onTouch View v  MotionEvent event            switch  event getAction                  case MotionEvent ACTION DOWN              handler postDelayed mLongPressed  1000                 This is where my code for movement is initialized to get original location              break          case MotionEvent ACTION UP              handler removeCallbacks mLongPressed               if Math abs event getRawX   - initialTouchX   lt   2  amp  amp   goneFlag                      Code for single click                 return false                            break          case MotionEvent ACTION MOVE              handler removeCallbacks mLongPressed                 Code for movement here  This may include using a window manager to update the view             break                    return true          I confirm it s working as I have used it in my own application

User · Answer

option  custom detector class  abstract public class Long hold extends View OnTouchListener     public Override boolean   onTouch View view  MotionEvent touch          switch touch getAction              case ACTION DOWN  down touch   return true      case ACTION MOVE  move touch             return true         private long   time 0    private float   x 0  y 0     private void   down MotionEvent touch          time 0  touch getEventTime        x 0  touch getX        y 0  touch getY           private void   move MotionEvent touch          if held too short touch   return       if moved too much touch    return        long press touch         abstract protected void   long hold MotionEvent touch       use  private double moved too much MotionEvent touch      return Math hypot        x 0 -touch getX          y 0 -touch getY     gt TOLERANCE     private double held too short MotionEvent touch      return touch getEventTime  -time 0  lt DOWN PERIOD      where   TOLERANCE is the maximum tolerated movement DOWN PERIOD is the time one has to press   import  static android view MotionEvent ACTION MOVE  static android view MotionEvent ACTION DOWN    in code  setOnTouchListener new Long hold         protected Override boolean   long hold MotionEvent touch            your code on long hold

User · Answer

The solution by MSquare works only if you hold a specific pixel  but that s an unreasonable expectation for an end user unless they use a mouse  which they don t  they use fingers    So I added a bit of a threshold for the distance between the DOWN and the UP action in case there was a MOVE action inbetween   final Handler longPressHandler   new Handler    Runnable longPressedRunnable   new Runnable         public void run             Log e TAG   Long press detected in long press Handler             isLongPressHandlerActivated   true            private boolean isLongPressHandlerActivated   false   private boolean isActionMoveEventStored   false  private float lastActionMoveEventBeforeUpX  private float lastActionMoveEventBeforeUpY    Override public boolean dispatchTouchEvent MotionEvent event        if event getAction      MotionEvent ACTION DOWN            longPressHandler postDelayed longPressedRunnable  1000             if event getAction      MotionEvent ACTION MOVE    event getAction      MotionEvent ACTION HOVER MOVE            if  isActionMoveEventStored                isActionMoveEventStored   true              lastActionMoveEventBeforeUpX   event getX                lastActionMoveEventBeforeUpY   event getY              else               float currentX   event getX                float currentY   event getY                float firstX   lastActionMoveEventBeforeUpX              float firstY   lastActionMoveEventBeforeUpY              double distance   Math sqrt                       currentY - firstY     currentY - firstY      currentX - firstX     currentX - firstX                 if distance  gt  20                    longPressHandler removeCallbacks longPressedRunnable                                     if event getAction      MotionEvent ACTION UP            isActionMoveEventStored   false          longPressHandler removeCallbacks longPressedRunnable           if isLongPressHandlerActivated                Log d TAG   Long Press detected  halting propagation of motion event                isLongPressHandlerActivated   false              return false                      return super dispatchTouchEvent event

User · Answer

setOnTouchListener new View OnTouchListener     public boolean onTouch View v  MotionEvent event                     int action   MotionEventCompat getActionMasked event                     switch  event getAction                          case MotionEvent ACTION DOWN                          longClick   false                          x1   event getX                            break                       case MotionEvent ACTION MOVE                          if  event getEventTime   - event getDownTime    gt  500  amp  amp  Math abs event getX   - x1   lt  MIN DISTANCE                                longClick   true                                                    break                       case MotionEvent ACTION UP                                  if  longClick                                        Toast makeText activity   Long preess   Toast LENGTH SHORT  show                                                                         return true

User · Answer

Here is an approach  based on MSquare s nice idea for detecting a long press of a button  that has an additional feature  not only is an operation performed in response to a long press  but the operation is repeated until a MotionEvent ACTION UP message is received  In this case  the long-press and short-press actions are the same  but they could be different    Note that  as others have reported  removing the callback in response to a MotionEvent ACTION MOVE message prevented the callback from ever getting executed since I could not keep my finger still enough  I got around that problem by ignoring that message      private void setIncrementButton         final Button btn    Button  findViewById R id btn       final Runnable repeater   new Runnable              Override         public void run                 increment                final int milliseconds   100              btn postDelayed this  milliseconds                        btn setOnTouchListener new View OnTouchListener              Override         public boolean onTouch View v  MotionEvent e                if  e getAction      MotionEvent ACTION DOWN                    increment                    v postDelayed repeater  ViewConfiguration getLongPressTimeout                   else if  e getAction      MotionEvent ACTION UP                    v removeCallbacks repeater                             return true                       private void increment         Log v  Long Press Example    TODO  implement increment operation

User · Answer

When you mean user presses  do you mean a click  A click is when the user presses down and then immediately lifts up finger  Therefore it is encompassing two onTouch Events  You should save the use of onTouchEvent for stuff that happens on the initial touch or the after release   Thus  you should be using onClickListener if it is a click   Your answer is analogous  Use onLongClickListener

User · Answer

I found one solution and it does not require to define runnable or other things and it s working fine       var lastTouchTime  Long   0           ViewConfiguration   DEFAULT LONG PRESS TIMEOUT  500      val longPressTime   500      var lastTouchX   0f     var lastTouchY   0f      view setOnTouchListener   v  event - gt           when  event action                MotionEvent ACTION DOWN - gt                    lastTouchTime   SystemClock elapsedRealtime                   lastTouchX   event x                 lastTouchY   event y                 return setOnTouchListener true                           MotionEvent ACTION UP - gt                    if  SystemClock elapsedRealtime   - lastTouchTime  gt  longPressTime                          amp  amp  Math abs event x - lastTouchX   lt  3                          amp  amp  Math abs event y - lastTouchY   lt  3                        Log d TAG   Long press                                     return setOnTouchListener true                           else - gt                    return setOnTouchListener false

User · Answer

GestureDetector is the best solution    Here is an interesting alternative  In onTouchEvent on every ACTION DOWN schedule a Runnable to run in 1 second  On every ACTION UP or ACTION MOVE  cancel scheduled Runnable  If cancelation happens less than 1s from ACTION DOWN event  Runnable won t run   final Handler handler   new Handler     Runnable mLongPressed   new Runnable          public void run              Log i      Long press                   Override public boolean onTouchEvent MotionEvent event  MapView mapView       if event getAction      MotionEvent ACTION DOWN          handler postDelayed mLongPressed  ViewConfiguration getLongPressTimeout         if  event getAction      MotionEvent ACTION MOVE    event getAction      MotionEvent ACTION UP           handler removeCallbacks mLongPressed       return super onTouchEvent event  mapView

User · Answer

I have created a snippet - inspired by the actual View source - that reliably detects long clicks presses with a custom delay  But it s in Kotlin   val LONG PRESS DELAY   500  val handler   Handler   var boundaries  Rect    null  var onTap   Runnable       handler postDelayed onLongPress  LONG PRESS DELAY - ViewConfiguration getTapTimeout   toLong       var onLongPress   Runnable           Long Press    override fun onTouch view  View  event  MotionEvent   Boolean       when  event action            MotionEvent ACTION DOWN - gt                boundaries   Rect view left  view top  view right  view bottom              handler postDelayed onTap  ViewConfiguration getTapTimeout   toLong                      MotionEvent ACTION UP  MotionEvent ACTION CANCEL - gt                handler removeCallbacks onLongPress              handler removeCallbacks onTap                    MotionEvent ACTION MOVE - gt                if   boundaries   contains view left   event x toInt    view top   event y toInt                       handler removeCallbacks onLongPress                  handler removeCallbacks onTap                                    return true

User · Answer

Try this   final GestureDetector gestureDetector   new GestureDetector new GestureDetector SimpleOnGestureListener         public void onLongPress MotionEvent e            Log e      Longpress detected               public boolean onTouchEvent MotionEvent event        return gestureDetector onTouchEvent event

User · Answer

The idea is creating a Runnable for execute long click in a future  but this execution can be canceled because of a click  or move   You also need to know  when long click was consumed  and when it is canceled because finger moved too much  We use initialTouchX  amp  initialTouchY for checking if the user exit a square area of 10 pixels  5 each side   Here is my complete code for delegating Click  amp  LongClick from Cell in ListView to Activity with OnTouchListener       ClickDelegate delegate       boolean goneFlag   false      float initialTouchX      float initialTouchY      final Handler handler   new Handler        Runnable mLongPressed   new Runnable             public void run                 Log i  TOUCH EVENT    Long press                 if  delegate    null                    goneFlag   delegate onItemLongClick index                 else                   goneFlag   true                                       OnTouch  R id layout       public boolean onTouch  View view  MotionEvent motionEvent            switch  motionEvent getAction                  case MotionEvent ACTION DOWN                  handler postDelayed mLongPressed  ViewConfiguration getLongPressTimeout                     initialTouchX   motionEvent getRawX                    initialTouchY   motionEvent getRawY                    return true              case MotionEvent ACTION MOVE              case MotionEvent ACTION CANCEL                  if  Math abs motionEvent getRawX   - initialTouchX   gt  5    Math abs motionEvent getRawY   - initialTouchY   gt  5                        handler removeCallbacks mLongPressed                       return true                                    return false              case MotionEvent ACTION UP                  handler removeCallbacks mLongPressed                   if  goneFlag    Math abs motionEvent getRawX   - initialTouchX   gt  5    Math abs motionEvent getRawY   - initialTouchY   gt  5                        goneFlag   false                      return true                                    break                    Log i  TOUCH EVENT    Short press             if  delegate    null                if  delegate onItemClick index                     return false                                  return false            ClickDelegateis an interface for sending click events to the handler class like an Activity      public interface ClickDelegate           boolean onItemClick int position           boolean onItemLongClick int position           And all what you need is to implement it in your Activity or parent Viewif you need to delegate the behavior   public class MyActivity extends Activity implements ClickDelegate          code          in some place of you code like onCreate         you need to set the delegate like this      SomeArrayAdapter delegate   this        or      SomeViewHolder delegate   this        or      SomeCustomView delegate   this        Override     public boolean onItemClick int position            Object obj   list get position           if  obj                return true    if you handle click           else               return false    if not  it could be another event                       Override     public boolean onItemLongClick int position            Object obj   list get position           if  obj                return true    if you handle long click           else               return false    if not  it s a click

[java] Detecting a long press with Android

Examples related to java

Examples related to android

Examples related to touchscreen

Examples related to long-click