Question

In my app, I have a home screen with 4 buttons on it. If, for some obscure and unfathomable reason, a user were to click on more than one button at the same time, all of the target activities would open in the order they were clicked.

I have seen a couple of questions on here about something similar, but they don’t really answer the question. Hopefully, I don’t have to override multitouch methods to handle it.

How can I avoid this behaviour, thus preventing multiple click events at the same time?

Answer 1

I had this exact issue in an application I developed. I found in testing that it was relatively easy to mash the screen with my hand and fire off onClick events for multiple buttons at the same time.

I used the same OnClickListener for all the buttons on the activity. The code was something like this :

protected final android.view.View.OnClickListener m_clickListener = new android.view.View.OnClickListener() {

    @Override
    public void onClick(View v) 
    {
        if(!m_buttonsEnabled)
        {
            return;
        }

        switch(v.getId())
        {
            case R.layout.button1:
                    m_buttonsEnabled = false;
                    final Intent i = new Intent(MainScreenActivity.this, Button1Activity.class);
                    startActivity(i);
                }
                break;

            case R.layout.button2:
                    m_buttonsEnabled = false;
                    final Intent i = new Intent(MainScreenActivity.this, Button2Activity.class);
                    startActivity(i);
                }
                break;

        }
    }