Make the blog post pager usable for the feed and individual blogs

briar-android/src/org/briarproject/android/blogs/BasePostFragment.java

@@ -0,0 +1,99 @@
+package org.briarproject.android.blogs;
+
+import android.os.Bundle;
+import android.support.annotation.CallSuper;
+import android.support.annotation.Nullable;
+import android.view.LayoutInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.briarproject.R;
+import org.briarproject.android.fragment.BaseFragment;
+import org.briarproject.api.db.DbException;
+
+import java.util.logging.Logger;
+
+import static org.briarproject.android.util.AndroidUtils.MIN_RESOLUTION;
+
+public abstract class BasePostFragment extends BaseFragment {
+
+	private final Logger LOG =
+			Logger.getLogger(BasePostFragment.class.getName());
+
+	private View view;
+	private BlogPostViewHolder ui;
+	private BlogPostItem post;
+	private Runnable refresher;
+
+	@CallSuper
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater, ViewGroup container,
+			Bundle savedInstanceState) {
+		setHasOptionsMenu(true);
+
+		view = inflater.inflate(R.layout.fragment_blog_post, container,
+				false);
+		ui = new BlogPostViewHolder(view);
+		return view;
+	}
+
+	@CallSuper
+	@Override
+	public void onStart() {
+		super.onStart();
+		startPeriodicUpdate();
+	}
+
+	@Override
+	public void onStop() {
+		super.onStop();
+		stopPeriodicUpdate();
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(final MenuItem item) {
+		switch (item.getItemId()) {
+			case android.R.id.home:
+				getActivity().onBackPressed();
+				return true;
+			default:
+				return super.onOptionsItemSelected(item);
+		}
+	}
+
+	protected void onBlogPostLoaded(BlogPostItem post) {
+		listener.hideLoadingScreen();
+		this.post = post;
+		ui.bindItem(post);
+	}
+
+	protected void onBlogPostLoadException(DbException exception) {
+		// TODO: Decide how to handle errors in the UI
+		finish();
+	}
+
+	private void startPeriodicUpdate() {
+		refresher = new Runnable() {
+			@Override
+			public void run() {
+				if (ui == null) return;
+				LOG.info("Updating Content...");
+
+				ui.updateDate(post.getTimestamp());
+				view.postDelayed(refresher, MIN_RESOLUTION);
+			}
+		};
+		LOG.info("Adding Handler Callback");
+		view.postDelayed(refresher, MIN_RESOLUTION);
+	}
+
+	private void stopPeriodicUpdate() {
+		if (refresher != null && ui != null) {
+			LOG.info("Removing Handler Callback");
+			view.removeCallbacks(refresher);
+		}
+	}
+
+}