Apps Android:How to run code depending on simultaneous hard key press?

[angelasim]

I am trying to implement a functionality when i press the VOLUME DOWN and POWER BUTTON simultaneously; i must be able to run a method code inside my Activity.

public boolean onKeyUp(int keyCode, KeyEvent event)
{
}
From my initial search; it seems that only one such key press event is acknowledged at a time in Android usng the onKeyUp method. Is it true?

In my Android phone, on simultaneously pressing POWER BUTTON as well as MENU BUTTON i am able to capture a screen shot.

Does this feature not acknowledge simultaneous key presses?

 

[aartsapp]

I have no idea if this might work - but how about you set a timer when either the volume down or power button is pressed - assume you wait 300 milliseconds. If the other button is pressed within that period you pass that as a simultaneous key press. I think the risk is pretty low that the user presses both buttons at the exact same millisecond.

 

[gerbyte]

Have two boolean flags, one for each button.
For each button, have key up and key down events, the key up making the relevant flag false and true when down.
A simple check of seeing whether both flags are true will allow you do what you wanted to happen.
For example:

Boolean powerFlag=false, volFlag=false;

public boolean onKeyUp(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_POWER) { powerFlag= false;
return true
} if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) { volFlag= false;
return true
} return super.onKeyUp(keyCode, event); }
public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) { volFlag=true; if (powerFlag) { //Do whatever }
return true; } if (keyCode == KeyEvent.KEYCODE_POWER) { powerFlag=true; if (volFlag) { //Do whatever }
return true; } return super.onKeyDown(keyCode, event); }

Something like this will probably work (I used something similar in my Shooting Watch app).

Thanks.