Android: Custom button OnClickListener is not getting invoked

Question

I have a custom button, on which I am capturing its onTouchEvent.

public class CustomNumber extends ToggleButton {
boolean drawGlow = false;
float glowX = 0;
float glowY = 0;
float radius = 30;


public CustomNumber(Context context) {
    super(context);
}


public CustomNumber(Context context, AttributeSet attrs) {
    super(context, attrs);
}


public CustomNumber(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}


Paint paint = new Paint();
{
    paint.setAntiAlias(true);
    paint.setColor(Color.WHITE);
    paint.setAlpha(70);
};

@Override
public void draw(Canvas canvas){
    super.draw(canvas);
    if(drawGlow)
        canvas.drawCircle(glowX, glowY, radius, paint);
}
@Override
**public boolean onTouchEvent(MotionEvent event)**{
    if(event.getAction() == MotionEvent.ACTION_DOWN){
        drawGlow = true;
    }else if(event.getAction() == MotionEvent.ACTION_UP)
        drawGlow = false;

    glowX = event.getX();
    glowY = event.getY();
    this.invalidate();
    return true;
}

}

This custom button is the part of a grid. When I am adding this button to the grid, I have set a OnClickListener to it. But, the code in the OnClickListener is never invoked.

//Grid Adapter code, where I am adding the button with listener.

public View getView(final int position, final View convertView, final ViewGroup parent) {
    CustomNumber tBtn;
    if (convertView == null) {
        tBtn = new CustomNumber(context);
        tBtn.setTextOff("");
        tBtn.setTextOn("");
        tBtn.setChecked(false);
        tBtn.setId(position);
        tBtn.setOnClickListener(tBtnListener);
        tBtn.setLayoutParams(new GridView.LayoutParams(35, 35));
    } else {
        tBtn = (CustomNumber) convertView;
    }
    return tBtn;
}

Please help.

Answer 1

I guess Mathias's comment is correct, you have to return false in your onTouchEvent method when you want the onClick() event listener to be triggered instead of a subsequent onTouch() event listener.

You can find more precision int UI Events documentation

Answer 2

Can you just execute your code in OnTouchEvent (a click is MotionEvent.ACTION_DOWN as you already know)?

Answer 3

Try impelementing OnTouchListener in your activity (instead of onClickListener) and change onClick() to onTouch(). This worked for me. Both onTouchEvent from my custom view and onTouch() from Activity are being called. Remeber to return "false" in onTouch() and "true" in OnTouchEvent of your custom view.