Android DroidGap disabling back button

Question

Please, anyone suggest, how can I disable back button press event while working with PhoneGap?

I need to do something in my Activity, (DroidGap code) for controlling the back button event.

Even, the following code works well in my Activity, but not working when being used with DroidGap.

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
     if (keyCode == KeyEvent.KEYCODE_BACK) {
         //preventing default implementation previous to android.os.Build.VERSION_CODES.ECLAIR
         return true;
     }
     return super.onKeyDown(keyCode, event);    
}

score 7 · Accepted Answer · edited Jun 29 '13 at 11:40

7

Calling setOnKeyListener on appView helped me out.

I just had to make a minor change in my above code snippet, which is as follows:

appView.setOnKeyListener(new OnKeyListener() { 
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            return true;
        }
        return onKeyDown(keyCode, event); 
    } 
});

EDITED

There actually occurs two actions while key-pressing event - Action Up & Action Down

So, the following should be used in order to get the key event.

appView.setOnKeyListener(new OnKeyListener() { 
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
            // Do Here whatever you want 
            return true;
        }
        return onKeyDown(keyCode, event); 
    } 
});

edited Jun 29 '13 at 11:40

stealthjong

10,858
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answered Apr 10 '13 at 10:44

Narendra Singh

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@PnestecDev: Are you trying to do something on your back button click? – Narendra Singh Apr 24 '13 at 11:45
Yes i am trying to navigate the pages on back click. – TechFanatic Apr 24 '13 at 11:46
@NarendraDroidWorm I implemented as per your answer... and the event is fired on click of device back button... when i click a device back button nothing should be happened.... Can u please help me how to acheive that? – Avadhani Y Jul 26 '13 at 07:34
just comment / remove the event you performed on back button click. – Narendra Singh Jul 26 '13 at 17:05
Also please remove -- event.getAction() == KeyEvent.ACTION_UP from the condition. – Narendra Singh Jul 27 '13 at 09:40

score 5 · Answer 2 · answered May 29 '13 at 07:23

Slightly better than Narendra's version. It can handle key up calls for key presses other than back button properly. Put the code below inside onCreate override for example.

appView.setOnKeyListener(new View.OnKeyListener() { 

        public boolean onKey(View v, int keyCode, KeyEvent event) {
            if (event.getAction() == KeyEvent.ACTION_UP) {
                if(keyCode == KeyEvent.KEYCODE_BACK) {
                    // Do Stuff Here
                    return true;
                }
                return onKeyUp(keyCode, event);
            }
            return onKeyDown(keyCode, event); 
        } 
   });

score 2 · Answer 3 · answered Apr 05 '13 at 13:03

2

In my case, I use Javascript + jquery like so:

$(document).on('backbutton',
     function(e){

         e.preventDefault();

         // do whatever you like here.

});

answered Apr 05 '13 at 13:03

wmfairuz

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does not work for me. jQ 1.8.3 + jQM 1.3.2 on Android (Motorola Razor) – Daniel Dec 20 '13 at 11:09

score 0 · Answer 4 · answered Oct 05 '13 at 05:11

0

// ************ stop the back button  *****************

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {

        return true;
    }
    return super.onKeyDown(keyCode, event);
}

answered Oct 05 '13 at 05:11

Rishi Gautam

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score 0 · Answer 5 · edited Feb 25 '14 at 06:55

0

if (keyCode == KeyEvent.KEYCODE_BACK) {

    return true;
}

edited Feb 25 '14 at 06:55

nielsbot

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answered Feb 25 '14 at 06:35

Malupet

1
4

Android DroidGap disabling back button

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