CODEWITHSUNDEEP
android
rajesh
rajesh

Reputation: 13

Class cast exception by onclick listener in android

I have written a code to implement onclick events of buttons in android. I have written the following line to set the listener in oncreate method. I want to recognize the touch event of a button in the application.i am getting a class cast exception in android.

mybtn[i].setOnClickListener( (OnClick Lisener)this);

for the alternatives to recognize the ontouch event i have looked at the SetKeylistener() , setonkeylistener() and setontouchlistener() methods. but i am not getting which one to use exactly.

What exactly i want to achieve is TTS should speak the number when the button is touched, and on the key release that number should be added to some textbox. so what methods should i use to accomplish these things.

Upvotes: 0

Views: 675

Answers (3)

jeet
jeet

Reputation: 29199

Implement interface in your activity class which ever listener you want to listen on button, like for onClickListener

public class A extends Activity implments OnClickListener

Upvotes: 0

JohnCookie
JohnCookie

Reputation: 671

use View.OnClickListener if you use setOnClickListener.

To accomplish your purpose you can btn.setOnTouchListener and do something according to the MotionEvent,such as event.getAction=MotionEvent.ACTION_UP ...

for example:

btn.setOnTouchListener(new OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_UP) {

            }
            if (event.getAction() == MotionEvent.ACTION_DOWN) {

            }
            return false;
        }
    });

Upvotes: 0

dor506
dor506

Reputation: 5414

You should accomplish the effect by doing this:

    mybtn[i].setOnTouchListener(new OnTouchListener()
    {

        @Override
        public boolean onTouch(View arg0, MotionEvent arg1)
        {
            switch (arg1.getAction())
            {
                case MotionEvent.ACTION_DOWN:
                    // Do some stuff
                    break;

                case MotionEvent.ACTION_UP:
                    // Do some stuff
                    break;
            }
            return false;
        }
    });

Upvotes: 1

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