问题

I am looking for a way for when a user long touches a mapview (lets say for 1000ms) that i can some how do a certain action.

How would i go about judging how long a user long touches a mapsview(or any view).

It would be similar to android google maps app, when you long touch, it brings up a balloon overlay item.

Edit added

mapView.setOnLongClickListener(new View.OnLongClickListener() {

        public boolean onLongClick(View v) {

            Toast.makeText(mapView.getContext(), "Hello 123", 2000);
            return false;
        }
    });

the above does not work... any ideas why?

Edit added

This is what i am trying at the moment, but it does not seem to work, even if i only press on the phone, it says the event is an action_move,

i am using an inner class in my MapActivity

    private long startTime=0;
private long endTime=0;

class MapOverlay extends Overlay {



    @Override
    public boolean onTouchEvent(MotionEvent ev, MapView mapView) {

        if(ev.getAction() == MotionEvent.ACTION_DOWN){
             //record the start time
             startTime = ev.getEventTime();

             Log.d("LC", "IN DOWN");
          }else if(ev.getAction() == MotionEvent.ACTION_UP){
             //record the end time
             endTime = ev.getEventTime();
             Log.d("LC", "IN UP");
          }else if(ev.getAction() == MotionEvent.ACTION_MOVE){
              Log.d("LC", "IN move");
              endTime=0;
          }

          //verify
          if(endTime - startTime > 1000){
             //we have a 1000ms duration touch
             //propagate your own event
              Log.d("LC", "time touched greater than 1000ms");
              Toast.makeText(getBaseContext(), "Hello 123", Toast.LENGTH_SHORT).show();
              startTime=0; 
              endTime=0;
             return true; //notify that you handled this event (do not propagate)
          }

        return false;//propogate to enable drag

    }

}

and here is my error log that does not make any sense to me

06-29 14:29:55.509: DEBUG/LC(7693): IN move
06-29 14:29:56.149: DEBUG/LC(7693): IN UP
06-29 14:29:56.149: DEBUG/LC(7693): 6346707 6349261
06-29 14:29:56.149: DEBUG/LC(7693): time touched greater than 1000ms

the end time should be set to zero...but it is not...any idea why?

回答1:

This is how do you normally create an onLongClickListener. Try this:

mapView.setOnLongClickListener(new OnLongClickListener() {

        @Override
        public boolean onLongClick(View arg0) {

            Toast.makeText(mapView.getContext(), "Hello 123", 2000);

            return false;

        }
    });

Reference to your edit:

This might be the way to get what you want.

private final Handler handler = new Handler();
private final Runnable runnable = new Runnable() {
public void run() {
     checkGlobalVariable();
}
};

// Other init stuff etc...

@Override
public void onTouchEvent(MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_DOWN) {
    // Execute your Runnable after 1000 milliseconds = 1 second.
    handler.postDelayed(runnable, 1000);
    mBooleanIsPressed = true;
}

if(event.getAction() == MotionEvent.ACTION_UP) {
    if(mBooleanIsPressed) {
        mBooleanIsPressed = false;
        handler.removeCallbacks(runnable);
    }
}
}

And now you can check with checkGlobalVariable function:

if(mBooleanIsPressed == true)

This is how you can handle this case. Good luck.

回答2:

Your are probably looking for a normal long click? You will have to set your view to be long clickable by adding android:longClickable to your views xml, or by calling setLongClickable(true). Then you can add an OnLongClickListener to the view. I dont know of a way to determine exactly how long the long click is. But the default long click is the same as the google maps long click that you mentioned.

OnLongClickListener

回答3:

You can set up a longClickListener and a touchListener. Add a boolean class data member variable longClicked and set it to false initially. This is how you can set the longClickListener.

    view.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {
            longClicked = true;
            return false;
        }
    });

For touchListener

    view.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if(longClicked){
                //Do whatever you want here!!
                longClicked = false;
            }
            return false;
        }
    });

It will give you the same effect as google maps long click. Hope it helps.

回答4:

use System.currentTimeMillis() instead of ev.getEventTime();

回答5:

When MotionEvent.ACTION_UP, endTime will be set to ev.getEventTime(), this make setting endTime to zero when MotionEvent.ACTION_MOVE be not affect. Instead of setting endTime to zero, you should set startTime to ev.getEventTime()

来源：https://stackoverflow.com/questions/6519748/how-to-determine-a-long-touch-on-android

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