How can I use the Android back button to move back within my app instead of closing my app?

Question

My app has three activities, A, B and C. I am moving from A to B through an OK button, and I want to move back from B to A by using the default back button of Android devices. W

Answer 1

In my onClick method (in Main Activity) I use the code:

 Intent intent = new Intent(context, SecondActivity.class);
 context.startActivityForResult(intent, SecondActivity.SECONDACTIVITY_REQUEST);

In the manifest I've got:

This works for me without any other settings that I can see. What events are you responding to?

Note that you can also go back an activity, in code like this:

super.setResult(Activity.RESULT_OK);
super.finish();

Edit... Make sure you're not swallowing the event in the Main Activitys onKeyDown event.

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    //your code here
    //if (keyCode ==
    //...
    //else
    return super.onKeyDown(keyCode, event);
}