CODEWITHSUNDEEP
androidandroid-intentandroid-tabhosttabactivity
darsh
darsh

Reputation: 751

Set Intent to back key in TabActivity

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 ?

Upvotes: 3

Views: 2029

Answers (3)

Raghul Sugathan
Raghul Sugathan

Reputation: 370

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);
}

Upvotes: 0

Dharmendra
Dharmendra

Reputation: 33996

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();
}

Upvotes: 5

Krishnakant Dalal
Krishnakant Dalal

Reputation: 3578

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));

Upvotes: 1

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