Set Intent to back key in TabActivity

Question

I have three Activities - A B and C, of which B is a Tab Activity. Activity A is launched first, and B is launched from A. I finish Activity A when B is launched using this code

public void onStop() {
   super.onStop();
   this.finish();
}

Now I want to launch Activity C when back key is pressed in B.

I tried overriding back key using this code

@Override 
public void onBackPressed() { this.getParent().onBackPressed();
}

This doesn't Help as the Parent Activity is finished while launching the Child Activity. What actually happens when I press back key is that the Activity exits to the Home screen.

I tried overriding the back key and setting an Intent to it

@Override
public void onBackPressed() {
    Intent backIntent = new Intent();
    backIntent.setClass(this, main.class);
    startActivity(backIntent);
}

This also doesn't help me. What could be a possible solution to this problem, How can I launch Activity C when back key is pressed ?

try.... backIntent.setClass(this, C.class); – dira May 04 '12 at 04:33 — dira, May 04 '12 at 04:33

Dharmendra · Accepted Answer · 2012-07-25T11:38:50.973

5

First you should not finish the activity A when Activity A stops this is completely wrong approach instead of it you have to finish activity when you start activity B.

For example

Intent i = new Intent(this, B.class);
startActivity(i);
finish();

Now you want to start the activity C when user press the back button so use the below code.

@Override
public void onBackPressed() {
    Intent backIntent = new Intent(this, C.class);
    startActivity(backIntent);
    super.onBackPressed();
}

edited Jul 25 '12 at 11:38

answered May 04 '12 at 04:39

Dharmendra

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Thanks for your effort. I tried this. The problem still persists. The activity C is not launched – darsh May 04 '12 at 06:29

score 1 · Answer 2 · answered May 04 '12 at 04:31

1

You have to override onKeyDown

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    // TODO Auto-generated method stub

    if (keyCode == event.KEYCODE_BACK)
    {
        //Do your code here
    }
    return super.onKeyDown(keyCode, event);
}
}

This will be called when user pressed Device Hard Back Button.

To navigate to next activity: StartActivity(new Intent(getApplicationContext(),main.class));

answered May 04 '12 at 04:31

Krishnakant Dalal

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Tried this. Unfortunately the problem persists. – darsh May 04 '12 at 06:31

score 0 · Answer 3 · edited Dec 23 '13 at 06:12

0

Override the below method and import event.....

public boolean onKeyDown(int keyCode, KeyEvent event) 
{
// TODO Auto-generated method stub

   if (keyCode == event.KEYCODE_BACK)
   {
      //Write your intent or other code here
   }
   return super.onKeyDown(keyCode, event);
}

edited Dec 23 '13 at 06:12

Nazik

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answered Dec 23 '13 at 05:52

Raghul Sugathan

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Set Intent to back key in TabActivity

3 Answers3