1.Replace main menu Activity with FragmentActivity (This is mean that I'm using Android "support libraries" instead of real Fragment api. That because I need to back porting this to running on the old devices also)
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
Yes, there is not much things inside MainActivity class but just calling setContentView method to set view for R.layout.main which is ...
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment class="com.myapp.TitlesFragment"
android:id="@+id/titles"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
At res/layout/main.xml and ... <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment class="com.myapp.TitlesFragment"
android:id="@+id/titles"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<fragment class="com.myapp.TitlesFragment"
android:id="@+id/fragment1"
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<FrameLayout android:id="@+id/details"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
At res/layout-land/main.xml<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<fragment class="com.myapp.TitlesFragment"
android:id="@+id/fragment1"
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<FrameLayout android:id="@+id/details"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
2.Create TitlesFragment class (just like they described here)
3.Change others Activity type to Fragment type. Here is somethings you need to change ...
- onBackPressed() method must be remove.
- Add onCreateView() method. Move all code in onCreate() method to onCreateView() method.
- Change 'this.' to 'this.getActivity().'
- To access view components, use 'View view = inflater.inflate(R.layout.find_scanner_view, container, false);'
- Be careful about this.getActivity().finish(); because in this case it means go finish the application.
- They said to using onSaveInstanceState() method to saving UI state but it seems not working probably what I expected it will. So I using SharedPreferences to save UI state and restoring them at onCreateView() method.
- Add xxxFragmentActivity inside the Fragment class...
public class BFragment extends Fragment implements OnClickListener,Runnable{
....
public static class BFragmentActivity extends FragmentActivity {
....
}
5. To sending result between Fragment classes and TitlesFragment class, just override setTargetFragment() method and calling it to passing caller Fragment reference.
static int targetRequestCode;
@Override
public void setTargetFragment(Fragment fragment, int requestCode){
super.setTargetFragment(fragment, requestCode);
targetFragment=fragment;
targetRequestCode=requestCode;
}
OK, This is just the point of view. In details, May be you need more homework to do. For my opinion, I think to making new app with Fragment should be a better choice than trying to porting old app to it ... it was painful job ...
Cheers,
