Change long click delay

后端 未结 7 1600
不知归路
不知归路 2020-12-09 08:45

I am listening for a View\'s long click events via setOnLongClickListener(). Can I change the long click delay / duration?

相关标签:
7条回答
  • 2020-12-09 09:25

    This is my way for set duration to long press

    private int longClickDuration = 3000;
    private boolean isLongPress = false;
    
    numEquipeCheat.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if (event.getAction() == MotionEvent.ACTION_DOWN) {
                    isLongPress = true;
                    Handler handler = new Handler();
                    handler.postDelayed(new Runnable() {
                        @Override
                        public void run() {
                            if (isLongPress) {
                                Vibrator vibrator = (Vibrator) getActivity().getSystemService(Context.VIBRATOR_SERVICE);
                                vibrator.vibrate(100);
                                // set your code here
                                // Don't forgot to add <uses-permission android:name="android.permission.VIBRATE" /> to vibrate.
                            }
                        }
                    }, longClickDuration);
                } else if (event.getAction() == MotionEvent.ACTION_UP) {
                    isLongPress = false;
                }
                return true;
            }
        });
    
    0 讨论(0)
  • 2020-12-09 09:25

    I defined an extension function in Kotlin inspired by @Galoway answer:

    fun View.setOnVeryLongClickListener(listener: () -> Unit) {
        setOnTouchListener(object : View.OnTouchListener {
    
            private val longClickDuration = 2000L
            private val handler = Handler()
    
            override fun onTouch(v: View?, event: MotionEvent?): Boolean {
                if (event?.action == MotionEvent.ACTION_DOWN) {
                    handler.postDelayed({ listener.invoke() }, longClickDuration)
                } else if (event?.action == MotionEvent.ACTION_UP) {
                    handler.removeCallbacksAndMessages(null)
                }
                return true
            }
        })
    }
    

    Use it like this:

    button.setOnVeryLongClickListener {
        // Do something here
    }
    
    0 讨论(0)
  • 2020-12-09 09:30

    AFAIK, no. It is hard-wired in the framework via getLongPressTimeout() on ViewConfiguration.

    You are welcome to handle your own touch events and define your own "long click" concept. Just be sure that it is not too dramatically different from what the user expects, and most likely the user will expect what all the other apps use, which is the standard 500ms duration.

    0 讨论(0)
  • 2020-12-09 09:33

    This was the simplest working solution I found to this restriction:

    //Define these variables at the beginning of your Activity or Fragment:
    private long then;
    private int longClickDuration = 5000; //for long click to trigger after 5 seconds
    
    ...
    
    //This can be a Button, TextView, LinearLayout, etc. if desired
    ImageView imageView = (ImageView) findViewById(R.id.desired_longclick_view);
    imageView.setOnTouchListener(new OnTouchListener() {
          @Override
          public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
              then = (long) System.currentTimeMillis();
            } else if (event.getAction() == MotionEvent.ACTION_UP) {
              if ((System.currentTimeMillis() - then) > longClickDuration) {
                /* Implement long click behavior here */
                System.out.println("Long Click has happened!");
                return false;
              } else {
                /* Implement short click behavior here or do nothing */
                System.out.println("Short Click has happened...");
                return false;
              }
            }
            return true;
          }
        });
    
    0 讨论(0)
  • 2020-12-09 09:33

    This is what I use. It is similar to Cumulo Nimbus' answer, with two notable differences.

    1. Use the already stored event values for down time and current time. Aside from not duplicating effort, this has the nice effect of making the listener usable for multiple views at the same time without tracking start times for each individual event.
    2. Check view.isPressed to ensure the user has not moved away from the view during the touch event. This mimics the default system behavior for onClick and onLongClick.

    long longPressTimeout = 2000;
    
    @Override
    public boolean onTouch(View view, MotionEvent event) {
        if (view.isPressed() && event.getAction() == MotionEvent.ACTION_UP) {
            long eventDuration = event.getEventTime() - event.getDownTime();
            if (eventDuration > longPressTimeout) {
                onLongClick(view);
            } else {
                onClick(view);
            }
        }
        return false;
    }
    

    If the view is not normally clickable you will need to call view.setClickable(true) for the view.isPressed() check to work.

    0 讨论(0)
  • 2020-12-09 09:36

    This is what worked for me on API 29, while retaining the button's visual down state using Kotlin:

    fun AppCompatButton.setOnVeryLongClickListener(
      holdDuration: Long = 1000L, 
      listener: () -> Unit
    ) {
        val handler = Handler()
        val originalText = this.text
    
        setOnTouchListener { v, event ->
            if (event?.action == MotionEvent.ACTION_DOWN) {
                // update the copy of the button
                text = "$originalText (KEEP HOLDING)"
    
                // fire the listener after our hold duration
                handler.postDelayed({ listener.invoke() }, holdDuration)
            } else if(event?.action == MotionEvent.ACTION_UP) {
                // update the copy of the button
                text = "$originalText (TAP & HOLD)"
    
                // in case of an interruption, cancel everything
                handler.removeCallbacksAndMessages(null)
            }
    
            // return false in order to retain the button's visual down state
            false
        }
    }
    
    button.setOnVeryLongClickListener {
        println("very long!")
    }
    
    0 讨论(0)
提交回复
热议问题