Closing application in Android - delay

I programmed a button into my android app that called the finish() method when I click it. But somehow it does not close until after a 5-6 second delay.

I am recording sensor values for a particular movement of the phone. The problem is when there is a delay after I close, it records those unnecessary values and the analysis is messed up.

So any idea why the UI takes so long to respond? I am very new to Android and I can't find this online. I don't do too much computation- as and when 开发者_JAVA百科sensors change I record the value onto a file in the sdcard memory. Sometimes if I run the program for too long, it just crashes and I don't know why.

Please help! I would also like to know if there's a manual way to kill through the computer? something like Ctrl+C for DOS?

Is there a keyboard shortcut to close a running Android application?

There is no concept in Android of "close a running Android application".

The Esc key in the emulator behaves as the BACK button to (typically) close the current activity.

I have a button that I use to kill the application in my phone and that has a huge delay.

No, you don't.