Android Open Source - Post List Activity

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The source code is released under:

Copyright (c) 2013 Karl Monaghan ( Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Soft...

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Java Source Code

/* ww  w . j  a v  a  2s .c  o  m*/
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;

 * An activity representing a list of Posts. This activity has different presentations for handset and tablet-size
 * devices. On handsets, the activity presents a list of items, which when touched, lead to a {@link PostDetailActivity}
 * representing item details. On tablets, the activity presents the list of items and item details side-by-side using
 * two vertical panes.
 * <p>
 * The activity makes heavy use of fragments. The list of items is a {@link PostListFragment} and the item details (if
 * present) is a {@link PostDetailFragment}.
 * <p>
 * This activity also implements the required {@link PostListFragment.Callbacks} interface to listen for item
 * selections.
public class PostListActivity extends BaseFragmentActivity implements PostListFragment.Callbacks {
    private static final String TAG = "PostListActivity";

     * Whether or not the activity is in two-pane mode, i.e. running on a tablet device.
    private boolean mTwoPane;

    protected void onCreate(Bundle savedInstanceState) {


        if (findViewById( != null) {
            Log.d(TAG, "Dual screen");
            // The detail container view will be present only in the
            // large-screen layouts (res/values-large and
            // res/values-sw600dp). If this view is present, then the
            // activity should be in two-pane mode.
            mTwoPane = true;

            // In two-pane mode, list items should be given the
            // 'activated' state when touched.
            ((PostListFragment) getSupportFragmentManager().findFragmentById(

        // TODO: If exposing deep links into your app, handle intents here.

     * Callback method from {@link PostListFragment.Callbacks} indicating that the item with the given ID was selected.
    public void onItemSelected(int id) {
        // Since we're using a pull to refresh, the posts are off by 1
        if (mTwoPane) {
            Log.d(TAG, "updating a fragment");
            // In two-pane mode, show the detail view in this activity by
            // adding or replacing the detail fragment using a
            // fragment transaction.
            Bundle arguments = new Bundle();
            arguments.putInt(PostDetailFragment.ARG_ITEM_ID, id);
            PostDetailFragment fragment = new PostDetailFragment();
            getSupportFragmentManager().beginTransaction().replace(, fragment).commit();

        } else {
            Log.d(TAG, "starting an activity for post at position: " + Integer.toString(id));
            // In single-pane mode, simply start the detail activity
            // for the selected item ID.
            Intent detailIntent = new Intent(this, PostDetailActivity.class);
            detailIntent.putExtra(PostDetailFragment.ARG_ITEM_ID, id);

    public boolean isDualScreen() {
        return mTwoPane;

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