Android: startActivity() starting a "chain" of activities?

Yes, I know. It sounds weird, but I can't think of any other way to explain it.

I start Activity MainActivity. It calls startActivity(B). B calls startActivity(C). In C, I have a button with an onClickListener that looks like this:

startActivity(new Intent(getApplicationContext(), MainActivity.class));

When I hit the button, I get to activity B, not Main!

LogCat shows this:

Activitymanager Starting activity: ... MainActivity

ActivityManager Starting activity: ... B

So, it looks like my MainActivity (A) gets started and then something-or-someone-mysterious starts activity B immediately.

Ideas? I'm at a loss...

Thanks!

Llappall

EDIT: A couple of notes to clarify:

1) I'm not overriding any lifecycle methods in MainActivity. I just have onCreate.

2) MainActivity's layout shows an image that covers the whole screen. I capture where the user touches in the image's OnTouchListener and, depending on that, I call different intents. The code looks like this:

if (touchX > 0 && touchX < 0.5 && touchY > 0.25
    && touchY < 0.46) {
    Intent i = new Intent(conte开发者_运维知识库xt, ShowListsActivity.class);
    i.putExtra("option", 0);
    startActivity(i);
} else if // if the location of the click is different I call another .class

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In C, I have a button:
startActivity(new Intent(getApplicationContext(), MainActivity.class));

You should use this instead of getApplicationContext().

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I start Activity MainActivity. It calls startActivity(B).

Ok, so MainActivity (A) calls B as soon as it starts?
Therefore it seems completely reasonable that B starts when you call the MainActivity intent.

Presumably you're calling "start B" in the onResume method of MainActivity — that means, every time you return to A it will immediately start B again.

Instead, you should probably call "start B" only from onCreate.

Though as codelark says above, it would be helpful to detail the lifecycle methods you are employing.