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package course.labs.fragmentslab;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.util.Log;
public class MainActivity extends Activity implements
FriendsFragment.SelectionListener {
private static final String TAG = "Lab-Fragments";
private FriendsFragment mFriendsFragment;
private FeedFragment mFeedFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
// If the layout is single-pane, create the FriendsFragment
// and add it to the Activity
if (!isInTwoPaneMode()) {
mFriendsFragment = new FriendsFragment();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.fragment_container, mFriendsFragment);
fragmentTransaction.commit();
} else {
// Otherwise, save a reference to the FeedFragment for later use
mFeedFragment = (FeedFragment) getFragmentManager().findFragmentById(R.id.feed_frag);
}
}
// If there is no fragment_container ID, then the application is in
// two-pane mode
private boolean isInTwoPaneMode() {
return findViewById(R.id.fragment_container) == null;
}
// Display selected Twitter feed
public void onItemSelected(int position) {
Log.i(TAG, "Entered onItemSelected(" + position + ")");
// If there is no FeedFragment instance, then create one
if (mFeedFragment == null)
mFeedFragment = new FeedFragment();
// If in single-pane mode, replace single visible Fragment
if (!isInTwoPaneMode()) {
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, mFeedFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
getFragmentManager().executePendingTransactions();
}
// Update Twitter feed display on FriendFragment
mFeedFragment.updateFeedDisplay(position);
}
}
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