QueuedUiRunnableFragment

UiRunnablesFragment.java

import android.content.Intent;
import com.actionbarsherlock.app.SherlockFragment;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

/**
 * Created with Intellij with Android, BIZZBY product.
 * This file is Exclusivly licenced under Apache Commons Licence 2.0
 * <p/>
 * User: chris
 * Date: 22/12/2012
 * Time: 16:11
 */
public class BaseFragment extends SherlockFragment
{

    // UI Runnables
    private final List<Runnable> mUiRunnables = new LinkedList<Runnable>();
    private boolean mIsPaused = false;
    // ============

    @Override
    public void onResume()
    {
        super.onResume();
        mIsPaused = false;
        runQueuedUiRunnables();
    }

    @Override
    public void onPause()
    {
        mIsPaused = true;
        super.onPause();
    }

    /**
     * Is the fragment paused?
     *
     * @return
     */
    public boolean isPaused()
    {
        return mIsPaused;
    }

    /**
     * Add a runnable task that can only be run during the activity being alive, things like dismissing dialogs when a background
     * task completes when the user is away from the activity.
     *
     * @param runnable runnable to run during the ui being alive.
     */
    protected void postUiRunnable(final Runnable runnable)
    {
        QLog.v("UiRunnables = " + runnable);
        if (null == runnable){
            return;
        }
        if (!mIsPaused && BaseActivity.isUiThread())
        {
            runnable.run();
        }
        else if (!mIsPaused && !BaseActivity.isUiThread() && getActivity() != null)
        {
            getActivity().runOnUiThread(runnable);
        }
        else
        {
            mUiRunnables.add(runnable);
        }
    }

    /**
     * Will run any pending UiRunnables on resuming the activity
     */
    private void runQueuedUiRunnables()
    {
        if (mIsPaused) return;
        if (mUiRunnables.isEmpty()) return;

        QLog.d("UiRunnables Running");
        final Iterator<Runnable> it = mUiRunnables.iterator();
        Runnable run;
        while (it.hasNext())
        {
            run = it.next();
            run.run();
            it.remove();
        }
    }

}