Question

I am a newbie in Android programming and I have this problem:

In this simple example, when I click on start button, I run a fragment. When I click on alarm button, I write in a log file.

Now, if I click first the start button, later the alarm button don’t run. I think the problem is the fragment don’t leave the interaction with user. Can you help me?
best regads
A.

public class MainActivity extends FragmentActivity {
private static final String FRAG1_TAG = MainActivity.class.getCanonicalName() +".fragment1";
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button buttonStart = (Button) findViewById(R.id.buttonStart);
    buttonStart.setOnClickListener(new OnClickListener() {

        public void onClick(View arg0) {
            Log.i("exemple", "start button Start !!!!!!");
            goFragment();

        }
    }); 
    Button buttonAllarm = (Button) findViewById(R.id.buttonAllarm);
    buttonAllarm.setOnClickListener(new OnClickListener() {

        public void onClick(View arg0) {            
        Log.i("exemple", "start button allarm !!!!!!");
        }// fine onClick    
    });// fine onClickListner
}

void goFragment() {

    FragmentManager fm = getSupportFragmentManager();
    FragmentTransaction xact = fm.beginTransaction();
    if (null == fm.findFragmentByTag(FRAG1_TAG)) {
        xact.replace(android.R.id.content, new ListFramment(), FRAG1_TAG);
         xact.addToBackStack (null);   // questo serve devi metterlo
            xact.commit();
    }
}

this is the fragment

      public class ListFramment extends ListFragment {
       // onCreate     
        @Override
   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
   }

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.activity_main, null);
    AppLog.logString("Parte onCreateView");
    return view;
}   

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    AppLog.logString("Parte onActivityCreated");
    ArrayList<Map<String, String>> list = buildData();

    String[] from = { "name", "purpose" };
    int[] to = { android.R.id.text1, android.R.id.text2 };

    SimpleAdapter adapter = new SimpleAdapter(getActivity(), list,
    android.R.layout.simple_list_item_2, from, to);
    setListAdapter(adapter);

}

    private ArrayList<Map<String, String>> buildData() {
    ArrayList<Map<String, String>> list = new ArrayList<Map<String, String>>();
    list.add(putData("Android", "Mobile"));
    list.add(putData("iPhone", "iPhone"));
    return list;
    // TODO Auto-generated method stub

}

private HashMap<String, String> putData(String name, String purpose) {
    HashMap<String, String> item = new HashMap<String, String>();
    item.put("name", name);
    item.put("purpose", purpose);
    return item;
}
}

Answer 1

Your problem is here:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
    Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_main, null);
AppLog.logString("Parte onCreateView");
return view;
}   

Your Fragment is inflating the same layout as the Activity that created it. But the Fragment does not have any onClickListeners. I suspect that the Fragment layout is covering up the Activity layout, duplicating it exactly, with non-functional buttons. That would explain why the button click works only the first time.

It would be normal for the Fragment to have its own layout, different from the Activity.